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CMAKE-VARIABLES(7)                   CMake                  CMAKE-VARIABLES(7)

NAME
cmake-variables - CMake Variables Reference

This page documents variables that are provided by CMake or have
meaning to CMake when set by project code.

For general information on variables, see the Variables section in the
cmake-language manual.

NOTE:
CMake reserves identifiers that:

o begin with CMAKE_ (upper-, lower-, or mixed-case), or

o begin with _CMAKE_ (upper-, lower-, or mixed-case), or

o begin with _ followed by the name of any CMake Command.

VARIABLES THAT PROVIDE INFORMATION
CMAKE_AR
Name of archiving tool for static libraries.

This specifies the name of the program that creates archive or static
libraries.

CMAKE_ARGC
Number of command line arguments passed to CMake in script mode.

When run in -P script mode, CMake sets this variable to the number of
command line arguments.  See also CMAKE_ARGV0, 1, 2 ...

CMAKE_ARGV0
Command line argument passed to CMake in script mode.

When run in -P script mode, CMake sets this variable to the first
command line argument.  It then also sets CMAKE_ARGV1, CMAKE_ARGV2, ...
and so on, up to the number of command line arguments given.  See also
CMAKE_ARGC.

CMAKE_BINARY_DIR
The path to the top level of the build tree.

This is the full path to the top level of the current CMake build tree.
For an in-source build, this would be the same as CMAKE_SOURCE_DIR.

When run in -P script mode, CMake sets the variables CMAKE_BINARY_DIR,
CMAKE_SOURCE_DIR, CMAKE_CURRENT_BINARY_DIR and CMAKE_CURRENT_SOURCE_DIR
to the current working directory.

CMAKE_BUILD_TOOL
This variable exists only for backwards compatibility.  It contains the
same value as CMAKE_MAKE_PROGRAM.  Use that variable instead.

CMAKE_CACHE_MAJOR_VERSION
Major version of CMake used to create the CMakeCache.txt file

This stores the major version of CMake used to write a CMake cache
file.  It is only different when a different version of CMake is run on
a previously created cache file.

CMAKE_CACHE_MINOR_VERSION
Minor version of CMake used to create the CMakeCache.txt file

This stores the minor version of CMake used to write a CMake cache
file.  It is only different when a different version of CMake is run on
a previously created cache file.

CMAKE_CACHE_PATCH_VERSION
Patch version of CMake used to create the CMakeCache.txt file

This stores the patch version of CMake used to write a CMake cache
file.  It is only different when a different version of CMake is run on
a previously created cache file.

CMAKE_CACHEFILE_DIR
This variable is used internally by CMake, and may not be set during
the first configuration of a build tree.  When it is set, it has the
same value as CMAKE_BINARY_DIR.  Use that variable instead.

CMAKE_CFG_INTDIR
Deprecated since version 3.21: This variable has poor support on Ninja
Multi-Config, and predates the existence of the $<CONFIG> generator expression. Use$<CONFIG> instead.

Build-time reference to per-configuration output subdirectory.

For native build systems supporting multiple configurations in the
build tree (such as Visual Studio Generators and Xcode), the value is a
reference to a build-time variable specifying the name of the
per-configuration output subdirectory.  On Makefile Generators this
evaluates to . because there is only one configuration in a build tree.
Example values:

$(ConfigurationName) = Visual Studio 9$(Configuration)     = Visual Studio 10
$(CONFIGURATION) = Xcode . = Make-based tools . = Ninja${CONFIGURATION}     = Ninja Multi-Config

Since these values are evaluated by the native build system, this
variable is suitable only for use in command lines that will be
evaluated at build time.  Example of intended usage:

OUTPUT out.txt
COMMAND ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR}/mytool
${CMAKE_CURRENT_SOURCE_DIR}/in.txt out.txt DEPENDS mytool in.txt ) add_custom_target(drive ALL DEPENDS out.txt) Note that CMAKE_CFG_INTDIR is no longer necessary for this purpose but has been left for compatibility with existing projects. Instead add_custom_command() recognizes executable target names in its COMMAND option, so${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR}/mytool can be replaced by just mytool. This variable is read-only. Setting it is undefined behavior. In multi-configuration build systems the value of this variable is passed as the value of preprocessor symbol CMAKE_INTDIR to the compilation of all source files. CMAKE_COMMAND The full path to the cmake(1) executable. This is the full path to the CMake executable cmake(1) which is useful from custom commands that want to use the cmake -E option for portable system commands. (e.g. /usr/local/bin/cmake) CMAKE_CPACK_COMMAND New in version 3.13. Full path to cpack(1) command installed with CMake. This is the full path to the CPack executable cpack(1) which is useful from custom commands that want to use the cmake(1) -E option for portable system commands. CMAKE_CROSSCOMPILING Intended to indicate whether CMake is cross compiling, but note limitations discussed below. This variable will be set to true by CMake if the CMAKE_SYSTEM_NAME variable has been set manually (i.e. in a toolchain file or as a cache entry from the cmake command line). In most cases, manually setting CMAKE_SYSTEM_NAME will only be done when cross compiling, since it will otherwise be given the same value as CMAKE_HOST_SYSTEM_NAME if not manually set, which is correct for the non-cross-compiling case. In the event that CMAKE_SYSTEM_NAME is manually set to the same value as CMAKE_HOST_SYSTEM_NAME, then CMAKE_CROSSCOMPILING will still be set to true. Another case to be aware of is that builds targeting Apple platforms other than macOS are handled differently to other cross compiling scenarios. Rather than relying on CMAKE_SYSTEM_NAME to select the target platform, Apple device builds use CMAKE_OSX_SYSROOT to select the appropriate SDK, which indirectly determines the target platform. Furthermore, when using the Xcode generator, developers can switch between device and simulator builds at build time rather than having a single choice at configure time, so the concept of whether the build is cross compiling or not is more complex. Therefore, the use of CMAKE_CROSSCOMPILING is not recommended for projects targeting Apple devices. CMAKE_CROSSCOMPILING_EMULATOR New in version 3.3. This variable is only used when CMAKE_CROSSCOMPILING is on. It should point to a command on the host system that can run executable built for the target system. New in version 3.15: If this variable contains a semicolon-separated list, then the first value is the command and remaining values are its arguments. The command will be used to run try_run() generated executables, which avoids manual population of the TryRunResults.cmake file. It is also used as the default value for the CROSSCOMPILING_EMULATOR target property of executables. CMAKE_CTEST_COMMAND Full path to ctest(1) command installed with CMake. This is the full path to the CTest executable ctest(1) which is useful from custom commands that want to use the cmake(1) -E option for portable system commands. CMAKE_CURRENT_BINARY_DIR The path to the binary directory currently being processed. This is the full path to the build directory that is currently being processed by cmake. Each directory added by add_subdirectory() will create a binary directory in the build tree, and as it is being processed this variable will be set. For in-source builds this is the current source directory being processed. When run in -P script mode, CMake sets the variables CMAKE_BINARY_DIR, CMAKE_SOURCE_DIR, CMAKE_CURRENT_BINARY_DIR and CMAKE_CURRENT_SOURCE_DIR to the current working directory. CMAKE_CURRENT_FUNCTION New in version 3.17. When executing code inside a function(), this variable contains the name of the current function. It can be useful for diagnostic or debug messages. See also CMAKE_CURRENT_FUNCTION_LIST_DIR, CMAKE_CURRENT_FUNCTION_LIST_FILE and CMAKE_CURRENT_FUNCTION_LIST_LINE. CMAKE_CURRENT_FUNCTION_LIST_DIR New in version 3.17. When executing code inside a function(), this variable contains the full directory of the listfile that defined the current function. It is quite common practice in CMake for modules to use some additional files, such as templates to be copied in after substituting CMake variables. In such cases, a function needs to know where to locate those files in a way that doesn't depend on where the function is called. Without CMAKE_CURRENT_FUNCTION_LIST_DIR, the code to do that would typically use the following pattern: set(_THIS_MODULE_BASE_DIR "${CMAKE_CURRENT_LIST_DIR}")

function(foo)
configure_file(
"${_THIS_MODULE_BASE_DIR}/some.template.in" some.output ) endfunction() Using CMAKE_CURRENT_FUNCTION_LIST_DIR inside the function instead eliminates the need for the extra variable which would otherwise be visible outside the function's scope. The above example can be written in the more concise and more robust form: function(foo) configure_file( "${CMAKE_CURRENT_FUNCTION_LIST_DIR}/some.template.in"
some.output
)
endfunction()

CMAKE_CURRENT_FUNCTION_LIST_LINE.

CMAKE_CURRENT_FUNCTION_LIST_FILE
New in version 3.17.

When executing code inside a function(), this variable contains the
full path to the listfile that defined the current function.

CMAKE_CURRENT_FUNCTION_LIST_LINE.

CMAKE_CURRENT_FUNCTION_LIST_LINE
New in version 3.17.

When executing code inside a function(), this variable contains the
line number in the listfile where the current function was defined.

CMAKE_CURRENT_FUNCTION_LIST_FILE.

CMAKE_CURRENT_LIST_DIR
Full directory of the listfile currently being processed.

As CMake processes the listfiles in your project this variable will
always be set to the directory where the listfile which is currently
being processed (CMAKE_CURRENT_LIST_FILE) is located.  The value has
dynamic scope.  When CMake starts processing commands in a source file
it sets this variable to the directory where this file is located.
When CMake finishes processing commands from the file it restores the
previous value.  Therefore the value of the variable inside a macro or
function is the directory of the file invoking the bottom-most entry on
the call stack, not the directory of the file containing the macro or
function definition.

CMAKE_CURRENT_LIST_FILE
Full path to the listfile currently being processed.

As CMake processes the listfiles in your project this variable will
always be set to the one currently being processed.  The value has
dynamic scope.  When CMake starts processing commands in a source file
it sets this variable to the location of the file.  When CMake finishes
processing commands from the file it restores the previous value.
Therefore the value of the variable inside a macro or function is the
file invoking the bottom-most entry on the call stack, not the file
containing the macro or function definition.

CMAKE_CURRENT_LIST_LINE
The line number of the current file being processed.

This is the line number of the file currently being processed by cmake.

If CMake is currently processing deferred calls scheduled by the
cmake_language(DEFER) command, this variable evaluates to DEFERRED
instead of a specific line number.

CMAKE_CURRENT_SOURCE_DIR
The path to the source directory currently being processed.

This is the full path to the source directory that is currently being
processed by cmake.

When run in -P script mode, CMake sets the variables CMAKE_BINARY_DIR,
CMAKE_SOURCE_DIR, CMAKE_CURRENT_BINARY_DIR and CMAKE_CURRENT_SOURCE_DIR
to the current working directory.

CMAKE_DEBUG_TARGET_PROPERTIES
Enables tracing output for target properties.

This variable can be populated with a list of properties to generate
debug output for when evaluating target properties.  Currently it can
only be used when evaluating:

o AUTOUIC_OPTIONS

o COMPILE_DEFINITIONS

o COMPILE_FEATURES

o COMPILE_OPTIONS

o INCLUDE_DIRECTORIES

o POSITION_INDEPENDENT_CODE

o SOURCES

target properties and any other property listed in
COMPATIBLE_INTERFACE_STRING and other COMPATIBLE_INTERFACE_ properties.
It outputs an origin for each entry in the target property.  Default is
unset.

CMAKE_DIRECTORY_LABELS
New in version 3.10.

Specify labels for the current directory.

This is used to initialize the LABELS directory property.

CMAKE_DL_LIBS
Name of library containing dlopen and dlclose.

The name of the library that has dlopen and dlclose in it, usually -ldl
on most UNIX machines.

CMAKE_DOTNET_SDK
New in version 3.23.

Default value for DOTNET_SDK property of targets.

This variable is used to initialize the DOTNET_SDK property on all
targets. See that target property for additional information.

CMAKE_DOTNET_TARGET_FRAMEWORK
New in version 3.17.

Default value for DOTNET_TARGET_FRAMEWORK property  of targets.

This variable is used to initialize the DOTNET_TARGET_FRAMEWORK
property on all targets. See that target property for additional
information.

Setting CMAKE_DOTNET_TARGET_FRAMEWORK may be necessary when working
with C# and newer .NET framework versions to avoid referencing errors
with the ALL_BUILD CMake target.

This variable is only evaluated for Visual Studio Generators VS 2010
and above.

CMAKE_DOTNET_TARGET_FRAMEWORK_VERSION
New in version 3.12.

Default value for DOTNET_TARGET_FRAMEWORK_VERSION property of targets.

This variable is used to initialize the DOTNET_TARGET_FRAMEWORK_VERSION
property on all targets. See that target property for additional
information. When set, CMAKE_DOTNET_TARGET_FRAMEWORK takes precednece
over this variable. See that variable or the associated target property
DOTNET_TARGET_FRAMEWORK for additional information.

Setting CMAKE_DOTNET_TARGET_FRAMEWORK_VERSION may be necessary when
working with C# and newer .NET framework versions to avoid referencing
errors with the ALL_BUILD CMake target.

This variable is only evaluated for Visual Studio Generators VS 2010
and above.

CMAKE_EDIT_COMMAND
Full path to cmake-gui(1) or ccmake(1).  Defined only for Makefile
Generators when not using an "extra" generator for an IDE.

This is the full path to the CMake executable that can graphically edit
the cache.  For example, cmake-gui(1) or ccmake(1).

CMAKE_EXECUTABLE_SUFFIX
The suffix for executables on this platform.

The suffix to use for the end of an executable filename if any, .exe on
Windows.

CMAKE_EXECUTABLE_SUFFIX_<LANG> overrides this for language <LANG>.

CMAKE_EXECUTABLE_SUFFIX_<LANG>
The suffix to use for the end of an executable filename of <LANG>
compiler target architecture, if any.

It overrides CMAKE_EXECUTABLE_SUFFIX for language <LANG>.

CMAKE_EXTRA_GENERATOR
The extra generator used to build the project.  See
cmake-generators(7).

When using the Eclipse, CodeBlocks, CodeLite, Kate or Sublime
generators, CMake generates Makefiles (CMAKE_GENERATOR) and
additionally project files for the respective IDE.  This IDE project
file generator is stored in CMAKE_EXTRA_GENERATOR (e.g.  Eclipse CDT4).

CMAKE_EXTRA_SHARED_LIBRARY_SUFFIXES
Additional suffixes for shared libraries.

Extensions for shared libraries other than that specified by
CMAKE_SHARED_LIBRARY_SUFFIX, if any.  CMake uses this to recognize
external shared library files during analysis of libraries linked by a
target.

CMAKE_FIND_DEBUG_MODE
New in version 3.17.

Print extra find call information for the following commands to
standard error:

o find_program()

o find_library()

o find_file()

o find_path()

o find_package()

Output is designed for human consumption and not for parsing.  Enabling
this variable is equivalent to using cmake --debug-find with the added
ability to enable debugging for a subset of find calls.

set(CMAKE_FIND_DEBUG_MODE TRUE)
find_program(...)
set(CMAKE_FIND_DEBUG_MODE FALSE)

Default is unset.

CMAKE_FIND_PACKAGE_NAME
New in version 3.1.1.

Defined by the find_package() command while loading a find module to
record the caller-specified package name.  See command documentation
for details.

CMAKE_FIND_PACKAGE_REDIRECTS_DIR
New in version 3.24.

This read-only variable specifies a directory that the find_package()
command will check first before searching anywhere else for a module or
config package file.  A config package file in this directory will
always be found in preference to any other Find module file or config
package file.

The primary purpose of this variable is to facilitate integration
between find_package() and FetchContent_MakeAvailable().  The latter
command may create files in the CMAKE_FIND_PACKAGE_REDIRECTS_DIR
directory when it populates a dependency.  This allows subsequent calls
to find_package() for the same dependency to re-use the populated
contents instead of trying to satisfy the dependency from somewhere
external to the build.  Projects may also want to write files into this
directory in some situations (see Integrating With find_package() for
examples).

The directory that CMAKE_FIND_PACKAGE_REDIRECTS_DIR points to will
always be erased and recreated empty at the start of every CMake run.
Any files written into this directory during the CMake run will be lost
the next time CMake configures the project.

CMAKE_FIND_PACKAGE_REDIRECTS_DIR is only set in CMake project mode.  It
is not set when CMake is run in script mode (i.e. cmake -P ...).

CMAKE_FIND_PACKAGE_SORT_DIRECTION
New in version 3.7.

The sorting direction used by CMAKE_FIND_PACKAGE_SORT_ORDER.  It can
assume one of the following values:

DEC    Default.  Ordering is done in descending mode.  The highest
folder found will be tested first.

ASC    Ordering is done in ascending mode.  The lowest folder found
will be tested first.

If CMAKE_FIND_PACKAGE_SORT_ORDER is not set or is set to NONE this
variable has no effect.

CMAKE_FIND_PACKAGE_SORT_ORDER
New in version 3.7.

The default order for sorting packages found using find_package().  It
can assume one of the following values:

NONE   Default.  No attempt is done to sort packages.  The first valid
package found will be selected.

NAME   Sort packages lexicographically before selecting one.

NATURAL
Sort packages using natural order (see strverscmp(3) manual),
i.e. such that contiguous digits are compared as whole numbers.

Natural sorting can be employed to return the highest version when
multiple versions of the same library are found by find_package().  For
example suppose that the following libraries have been found:

o libX-1.1.0

o libX-1.2.9

o libX-1.2.10

By setting NATURAL order we can select the one with the highest version
number libX-1.2.10.

set(CMAKE_FIND_PACKAGE_SORT_ORDER NATURAL)
find_package(libX CONFIG)

The sort direction can be controlled using the
CMAKE_FIND_PACKAGE_SORT_DIRECTION variable (by default decrescent, e.g.
lib-B will be tested before lib-A).

CMAKE_GENERATOR
The generator used to build the project.  See cmake-generators(7).

The name of the generator that is being used to generate the build
files.  (e.g.  Unix Makefiles, Ninja, etc.)

The value of this variable should never be modified by project code.  A
generator may be selected via the cmake(1) -G option, interactively in
cmake-gui(1), or via the CMAKE_GENERATOR environment variable.

CMAKE_GENERATOR_INSTANCE
New in version 3.11.

Generator-specific instance specification provided by user.

Some CMake generators support selection of an instance of the native
build system when multiple instances are available.  If the user
specifies an instance (e.g. by setting this cache entry or via the
CMAKE_GENERATOR_INSTANCE environment variable), or after a default
instance is chosen when a build tree is first configured, the value
will be available in this variable.

The value of this variable should never be modified by project code.  A
toolchain file specified by the CMAKE_TOOLCHAIN_FILE variable may
initialize CMAKE_GENERATOR_INSTANCE as a cache entry.  Once a given
build tree has been initialized with a particular value for this
variable, changing the value has undefined behavior.

Instance specification is supported only on specific generators.

Visual Studio Instance Selection
Visual Studio Generators support instance specification for Visual
Studio 2017 and above.  The CMAKE_GENERATOR_INSTANCE variable may be
set as a cache entry selecting an instance of Visual Studio via one of
the following forms:

o location

o location[,key=value]*

o key=value[,key=value]*

The location specifies the absolute path to the top-level directory of
the VS installation.

The key=value pairs form a comma-separated list of options to specify
details of the instance selection.  Supported pairs are:

version=<major>.<minor>.<date>.<build>
New in version 3.23.

Specify the 4-component VS Build Version, a.k.a. Build Number.
The components are:

<major>.<minor>
The VS major and minor version numbers.  These are the same
as the release version numbers.

<date>
A build date in the format MMMDD, where MMM is a month index
since an epoch used by Microsoft, and DD is a day in that
month.

<build>
A build index on the day represented by <date>.

The build number is reported by vswhere as installationVersion.
For example, VS 16.11.10 has build number 16.11.32126.315.

New in version 3.23: A portable VS instance, which is not known to the
Visual Studio Installer, may be specified by providing both location
and version=.

If the value of CMAKE_GENERATOR_INSTANCE is not specified explicitly by
the user or a toolchain file, CMake queries the Visual Studio Installer
to locate VS instances, chooses one, and sets the variable as a cache
entry to hold the value persistently.  If an environment variable of
the form VS##0COMNTOOLS, where ## the Visual Studio major version
number, is set and points to the Common7/Tools directory within one of
the VS instances, that instance will be used.  Otherwise, if more than
one VS instance is installed we do not define which one is chosen by
default.

CMAKE_GENERATOR_PLATFORM
New in version 3.1.

Generator-specific target platform specification provided by user.

Some CMake generators support a target platform name to be given to the
native build system to choose a compiler toolchain.  If the user
specifies a platform name (e.g. via the cmake(1) -A option or via the
CMAKE_GENERATOR_PLATFORM environment variable) the value will be
available in this variable.

The value of this variable should never be modified by project code.  A
toolchain file specified by the CMAKE_TOOLCHAIN_FILE variable may
initialize CMAKE_GENERATOR_PLATFORM.  Once a given build tree has been
initialized with a particular value for this variable, changing the
value has undefined behavior.

Platform specification is supported only on specific generators:

o For Visual Studio Generators with VS 2005 and above this specifies
the target architecture.

o For Green Hills MULTI this specifies the target architecture.

See native build system documentation for allowed platform names.

Visual Studio Platform Selection
On Visual Studio Generators the selected platform name is provided in
the CMAKE_VS_PLATFORM_NAME variable.

CMAKE_GENERATOR_TOOLSET
Native build system toolset specification provided by user.

Some CMake generators support a toolset specification to tell the
native build system how to choose a compiler.  If the user specifies a
toolset (e.g. via the cmake(1) -T option or via the
CMAKE_GENERATOR_TOOLSET environment variable) the value will be
available in this variable.

The value of this variable should never be modified by project code.  A
toolchain file specified by the CMAKE_TOOLCHAIN_FILE variable may
initialize CMAKE_GENERATOR_TOOLSET.  Once a given build tree has been
initialized with a particular value for this variable, changing the
value has undefined behavior.

Toolset specification is supported only on specific generators:

o Visual Studio Generators for VS 2010 and above

o The Xcode generator for Xcode 3.0 and above

o The Green Hills MULTI generator

See native build system documentation for allowed toolset names.

Visual Studio Toolset Selection
The Visual Studio Generators support toolset specification using one of
these forms:

o toolset

o toolset[,key=value]*

o key=value[,key=value]*

The toolset specifies the toolset name.  The selected toolset name is
provided in the CMAKE_VS_PLATFORM_TOOLSET variable.

The key=value pairs form a comma-separated list of options to specify
generator-specific details of the toolset selection.  Supported pairs
are:

cuda=<version>|<path>
Specify the CUDA toolkit version to use or the path to a
standalone CUDA toolkit directory.  Supported by VS 2010 and
above. The version can only be used with the CUDA toolkit VS
integration globally installed.  See the
CMAKE_VS_PLATFORM_TOOLSET_CUDA and
CMAKE_VS_PLATFORM_TOOLSET_CUDA_CUSTOM_DIR variables.

host=<arch>
Specify the host tools architecture as x64 or x86.  Supported by
VS 2013 and above.  See the
CMAKE_VS_PLATFORM_TOOLSET_HOST_ARCHITECTURE variable.

version=<version>
Specify the toolset version to use.  Supported by VS 2017 and
above with the specified toolset installed.  See the
CMAKE_VS_PLATFORM_TOOLSET_VERSION variable.

VCTargetsPath=<path>
Specify an alternative VCTargetsPath value for Visual Studio
project files.  This allows use of VS platform extension
configuration files (.props and .targets) that are not installed
with VS.

Visual Studio Toolset Customization
These are unstable interfaces with no compatibility guarantees because
they hook into undocumented internal CMake implementation details.
Institutions may use these to internally maintain support for
non-public Visual Studio platforms and toolsets, but must accept
responsibility to make updates as changes are made to CMake.

Additional key=value pairs are available:

customFlagTableDir=<path>
New in version 3.21.

Specify the absolute path to a directory from which to load
custom flag tables stored as JSON documents with file names of
the form <platform>_<toolset>_<tool>.json or
<platform>_<tool>.json, where <platform> is the
CMAKE_VS_PLATFORM_NAME, <toolset> is the
CMAKE_VS_PLATFORM_TOOLSET, and <tool> is the tool for which the
flag table is meant.  This naming pattern is an internal CMake
implementation detail. The <tool> names are undocumented.  The
format of the .json flag table files is undocumented.

CMAKE_IMPORT_LIBRARY_PREFIX
The prefix for import libraries that you link to.

The prefix to use for the name of an import library if used on this
platform.

CMAKE_IMPORT_LIBRARY_PREFIX_<LANG> overrides this for language <LANG>.

CMAKE_IMPORT_LIBRARY_SUFFIX
The suffix for import libraries that you link to.

The suffix to use for the end of an import library filename if used on
this platform.

CMAKE_IMPORT_LIBRARY_SUFFIX_<LANG> overrides this for language <LANG>.

CMAKE_JOB_POOL_COMPILE
This variable is used to initialize the JOB_POOL_COMPILE property on
all the targets. See JOB_POOL_COMPILE for additional information.

This variable is used to initialize the JOB_POOL_LINK property on all
the targets. See JOB_POOL_LINK for additional information.

New in version 3.17.

This variable is used to initialize the JOB_POOL_PRECOMPILE_HEADER
property on all the targets. See JOB_POOL_PRECOMPILE_HEADER for

CMAKE_JOB_POOLS
New in version 3.11.

If the JOB_POOLS global property is not set, the value of this variable
is used in its place.  See JOB_POOLS for additional information.

CMAKE_<LANG>_COMPILER_AR
New in version 3.9.

A wrapper around ar adding the appropriate --plugin option for the
compiler.

CMAKE_<LANG>_COMPILER_FRONTEND_VARIANT
New in version 3.14.

Identification string of the compiler frontend variant.

Some compilers have multiple, different frontends for accepting command
line options.  (For example Clang originally only had a frontend
compatible with the GNU compiler but since its port to Windows
(Clang-Cl) it now also supports a frontend compatible with MSVC.) When
CMake detects such a compiler it sets this variable to what would have
been the CMAKE_<LANG>_COMPILER_ID for the compiler whose frontend it
resembles.

NOTE:
In other words, this variable describes what command line options
and language extensions the compiler frontend expects.

CMAKE_<LANG>_COMPILER_RANLIB
New in version 3.9.

A wrapper around ranlib adding the appropriate --plugin option for the
compiler.

New in version 3.16.

Language-specific suffix for libraries that you link to.

The suffix to use for the end of a library filename, .lib on Windows.

The suffix for libraries that you link to.

The suffix to use for the end of a library filename, .lib on Windows.

New in version 3.4.

End a link line such that static system libraries are used.

Some linkers support switches such as -Bstatic and -Bdynamic to
determine whether to use static or shared libraries for -lXXX options.
CMake uses these options to set the link type for libraries whose full
paths are not known or (in some cases) are in implicit link directories
for the platform.  By default CMake adds an option at the end of the
library list (if necessary) to set the linker search type back to its
starting type.  This property switches the final linker search type to
-Bstatic regardless of how it started.

This variable is used to initialize the target property
LINK_SEARCH_END_STATIC for all targets. If set, its value is also used
by the try_compile() command.

New in version 3.4.

Assume the linker looks for static libraries by default.

Some linkers support switches such as -Bstatic and -Bdynamic to
determine whether to use static or shared libraries for -lXXX options.
CMake uses these options to set the link type for libraries whose full
paths are not known or (in some cases) are in implicit link directories
for the platform.  By default the linker search type is assumed to be
-Bdynamic at the beginning of the library list.  This property switches
the assumption to -Bstatic.  It is intended for use when linking an
executable statically (e.g.  with the GNU -static option).

This variable is used to initialize the target property
LINK_SEARCH_START_STATIC for all targets.  If set, its value is also
used by the try_compile() command.

CMAKE_MAJOR_VERSION
First version number component of the CMAKE_VERSION variable.

CMAKE_MAKE_PROGRAM
Tool that can launch the native build system.  The value may be the
full path to an executable or just the tool name if it is expected to
be in the PATH.

The tool selected depends on the CMAKE_GENERATOR used to configure the
project:

o The Makefile Generators set this to make, gmake, or a
generator-specific tool (e.g. nmake for NMake Makefiles).

These generators store CMAKE_MAKE_PROGRAM in the CMake cache so that
it may be edited by the user.

o The Ninja generator sets this to ninja.

This generator stores CMAKE_MAKE_PROGRAM in the CMake cache so that
it may be edited by the user.

o The Xcode generator sets this to xcodebuild.

This generator prefers to lookup the build tool at build time rather
than to store CMAKE_MAKE_PROGRAM in the CMake cache ahead of time.
This is because xcodebuild is easy to find.

For compatibility with versions of CMake prior to 3.2, if a user or
project explicitly adds CMAKE_MAKE_PROGRAM to the CMake cache then
CMake will use the specified value.

o The Visual Studio Generators set this to the full path to MSBuild.exe
(VS >= 10), devenv.com (VS 7,8,9), or VCExpress.exe (VS Express 8,9).
CMAKE_VS_DEVENV_COMMAND.

These generators prefer to lookup the build tool at build time rather
than to store CMAKE_MAKE_PROGRAM in the CMake cache ahead of time.
This is because the tools are version-specific and can be located
using the Windows Registry.  It is also necessary because the proper
build tool may depend on the project content (e.g. the Intel Fortran
plugin to VS 10 and 11 requires devenv.com to build its .vfproj
project files even though MSBuild.exe is normally preferred to
support the CMAKE_GENERATOR_TOOLSET).

For compatibility with versions of CMake prior to 3.0, if a user or
project explicitly adds CMAKE_MAKE_PROGRAM to the CMake cache then
CMake will use the specified value if possible.

o The Green Hills MULTI generator sets this to the full path to
gbuild.exe(Windows) or gbuild(Linux) based upon the toolset being
used.

Once the generator has initialized a particular value for this
variable, changing the value has undefined behavior.

The CMAKE_MAKE_PROGRAM variable is set for use by project code.  The
value is also used by the cmake(1) --build and ctest(1)
--build-and-test tools to launch the native build process.

CMAKE_MATCH_COUNT
New in version 3.2.

The number of matches with the last regular expression.

When a regular expression match is used, CMake fills in CMAKE_MATCH_<n>
variables with the match contents.  The CMAKE_MATCH_COUNT variable
holds the number of match expressions when these are filled.

CMAKE_MATCH_<n>
New in version 3.9.

Capture group <n> matched by the last regular expression, for groups 0
through 9.  Group 0 is the entire match.  Groups 1 through 9 are the
subexpressions captured by () syntax.

When a regular expression match is used, CMake fills in CMAKE_MATCH_<n>
variables with the match contents.  The CMAKE_MATCH_COUNT variable
holds the number of match expressions when these are filled.

CMAKE_MINIMUM_REQUIRED_VERSION
The <min> version of CMake given to the most recent call to the
cmake_minimum_required(VERSION) command in the current variable scope
or any parent variable scope.

CMAKE_MINOR_VERSION
Second version number component of the CMAKE_VERSION variable.

CMAKE_NETRC
New in version 3.11.

This variable is used to initialize the NETRC option for the

This variable is also used by the ExternalProject and FetchContent

The local option takes precedence over this variable.

CMAKE_NETRC_FILE
New in version 3.11.

This variable is used to initialize the NETRC_FILE option for the

This variable is also used by the ExternalProject and FetchContent

The local option takes precedence over this variable.

CMAKE_PARENT_LIST_FILE
Full path to the CMake file that included the current one.

While processing a CMake file loaded by include() or find_package()
this variable contains the full path to the file including it.  The top
of the include stack is always the CMakeLists.txt for the current

CMAKE_PATCH_VERSION
Third version number component of the CMAKE_VERSION variable.

CMAKE_PROJECT_DESCRIPTION
New in version 3.9.

The description of the top level project.

This variable holds the description of the project as specified in the
top level CMakeLists.txt file by a project() command.  In the event
that the top level CMakeLists.txt contains multiple project() calls,
the most recently called one from that top level CMakeLists.txt will
determine the value that CMAKE_PROJECT_DESCRIPTION contains.  For
example, consider the following top level CMakeLists.txt:

cmake_minimum_required(VERSION 3.0)
project(First DESCRIPTION "I am First")
project(Second DESCRIPTION "I am Second")
project(Third DESCRIPTION "I am Third")

And sub/CMakeLists.txt with the following contents:

project(SubProj DESCRIPTION "I am SubProj")
message("CMAKE_PROJECT_DESCRIPTION = ${CMAKE_PROJECT_DESCRIPTION}") The most recently seen project() command from the top level CMakeLists.txt would be project(Second ...), so this will print: CMAKE_PROJECT_DESCRIPTION = I am Second To obtain the description from the most recent call to project() in the current directory scope or above, see the PROJECT_DESCRIPTION variable. CMAKE_PROJECT_HOMEPAGE_URL New in version 3.12. The homepage URL of the top level project. This variable holds the homepage URL of the project as specified in the top level CMakeLists.txt file by a project() command. In the event that the top level CMakeLists.txt contains multiple project() calls, the most recently called one from that top level CMakeLists.txt will determine the value that CMAKE_PROJECT_HOMEPAGE_URL contains. For example, consider the following top level CMakeLists.txt: cmake_minimum_required(VERSION 3.0) project(First HOMEPAGE_URL "http://first.example.com") project(Second HOMEPAGE_URL "http://second.example.com") add_subdirectory(sub) project(Third HOMEPAGE_URL "http://third.example.com") And sub/CMakeLists.txt with the following contents: project(SubProj HOMEPAGE_URL "http://subproj.example.com") message("CMAKE_PROJECT_HOMEPAGE_URL =${CMAKE_PROJECT_HOMEPAGE_URL}")

The most recently seen project() command from the top level
CMakeLists.txt would be project(Second ...), so this will print:

CMAKE_PROJECT_HOMEPAGE_URL = http://second.example.com

To obtain the homepage URL from the most recent call to project() in
the current directory scope or above, see the PROJECT_HOMEPAGE_URL
variable.

CMAKE_PROJECT_NAME
The name of the top level project.

This variable holds the name of the project as specified in the top
level CMakeLists.txt file by a project() command.  In the event that
the top level CMakeLists.txt contains multiple project() calls, the
most recently called one from that top level CMakeLists.txt will
determine the name that CMAKE_PROJECT_NAME contains.  For example,
consider the following top level CMakeLists.txt:

cmake_minimum_required(VERSION 3.0)
project(First)
project(Second)
project(Third)

And sub/CMakeLists.txt with the following contents:

project(SubProj)
message("CMAKE_PROJECT_NAME = ${CMAKE_PROJECT_NAME}") The most recently seen project() command from the top level CMakeLists.txt would be project(Second), so this will print: CMAKE_PROJECT_NAME = Second To obtain the name from the most recent call to project() in the current directory scope or above, see the PROJECT_NAME variable. CMAKE_PROJECT_VERSION New in version 3.12. The version of the top level project. This variable holds the version of the project as specified in the top level CMakeLists.txt file by a project() command. In the event that the top level CMakeLists.txt contains multiple project() calls, the most recently called one from that top level CMakeLists.txt will determine the value that CMAKE_PROJECT_VERSION contains. For example, consider the following top level CMakeLists.txt: cmake_minimum_required(VERSION 3.0) project(First VERSION 1.2.3) project(Second VERSION 3.4.5) add_subdirectory(sub) project(Third VERSION 6.7.8) And sub/CMakeLists.txt with the following contents: project(SubProj VERSION 1) message("CMAKE_PROJECT_VERSION =${CMAKE_PROJECT_VERSION}")

The most recently seen project() command from the top level
CMakeLists.txt would be project(Second ...), so this will print:

CMAKE_PROJECT_VERSION = 3.4.5

To obtain the version from the most recent call to project() in the
current directory scope or above, see the PROJECT_VERSION variable.

CMAKE_PROJECT_VERSION_MAJOR
New in version 3.12.

The major version of the top level project.

This variable holds the major version of the project as specified in
the top level CMakeLists.txt file by a project() command. Please see
CMAKE_PROJECT_VERSION documentation for the behavior when multiple
project() commands are used in the sources.

CMAKE_PROJECT_VERSION_MINOR
New in version 3.12.

The minor version of the top level project.

This variable holds the minor version of the project as specified in
the top level CMakeLists.txt file by a project() command. Please see
CMAKE_PROJECT_VERSION documentation for the behavior when multiple
project() commands are used in the sources.

CMAKE_PROJECT_VERSION_PATCH
New in version 3.12.

The patch version of the top level project.

This variable holds the patch version of the project as specified in
the top level CMakeLists.txt file by a project() command. Please see
CMAKE_PROJECT_VERSION documentation for the behavior when multiple
project() commands are used in the sources.

CMAKE_PROJECT_VERSION_TWEAK
New in version 3.12.

The tweak version of the top level project.

This variable holds the tweak version of the project as specified in
the top level CMakeLists.txt file by a project() command. Please see
CMAKE_PROJECT_VERSION documentation for the behavior when multiple
project() commands are used in the sources.

CMAKE_RANLIB
Name of randomizing tool for static libraries.

This specifies name of the program that randomizes libraries on UNIX,
not used on Windows, but may be present.

CMAKE_ROOT
Install directory for running cmake.

This is the install root for the running CMake and the Modules
directory can be found here.  This is commonly used in this format:
${CMAKE_ROOT}/Modules CMAKE_RULE_MESSAGES New in version 3.13. Specify whether to report a message for each make rule. If set in the cache it is used to initialize the value of the RULE_MESSAGES property. Users may disable the option in their local build tree to disable granular messages and report only as each target completes in Makefile builds. CMAKE_SCRIPT_MODE_FILE Full path to the cmake(1) -P script file currently being processed. When run in cmake(1) -P script mode, CMake sets this variable to the full path of the script file. When run to configure a CMakeLists.txt file, this variable is not set. CMAKE_SHARED_LIBRARY_PREFIX The prefix for shared libraries that you link to. The prefix to use for the name of a shared library, lib on UNIX. CMAKE_SHARED_LIBRARY_PREFIX_<LANG> overrides this for language <LANG>. CMAKE_SHARED_LIBRARY_SUFFIX The suffix for shared libraries that you link to. The suffix to use for the end of a shared library filename, .dll on Windows. CMAKE_SHARED_LIBRARY_SUFFIX_<LANG> overrides this for language <LANG>. CMAKE_SHARED_MODULE_PREFIX The prefix for loadable modules that you link to. The prefix to use for the name of a loadable module on this platform. CMAKE_SHARED_MODULE_PREFIX_<LANG> overrides this for language <LANG>. CMAKE_SHARED_MODULE_SUFFIX The suffix for shared libraries that you link to. The suffix to use for the end of a loadable module filename on this platform CMAKE_SHARED_MODULE_SUFFIX_<LANG> overrides this for language <LANG>. CMAKE_SIZEOF_VOID_P Size of a void pointer. This is set to the size of a pointer on the target machine, and is determined by a try compile. If a 64-bit size is found, then the library search path is modified to look for 64-bit libraries first. CMAKE_SKIP_INSTALL_RULES Whether to disable generation of installation rules. If TRUE, CMake will neither generate installation rules nor will it generate cmake_install.cmake files. This variable is FALSE by default. CMAKE_SKIP_RPATH If true, do not add run time path information. If this is set to TRUE, then the rpath information is not added to compiled executables. The default is to add rpath information if the platform supports it. This allows for easy running from the build tree. To omit RPATH in the install step, but not the build step, use CMAKE_SKIP_INSTALL_RPATH instead. CMAKE_SOURCE_DIR The path to the top level of the source tree. This is the full path to the top level of the current CMake source tree. For an in-source build, this would be the same as CMAKE_BINARY_DIR. When run in -P script mode, CMake sets the variables CMAKE_BINARY_DIR, CMAKE_SOURCE_DIR, CMAKE_CURRENT_BINARY_DIR and CMAKE_CURRENT_SOURCE_DIR to the current working directory. CMAKE_STATIC_LIBRARY_PREFIX The prefix for static libraries that you link to. The prefix to use for the name of a static library, lib on UNIX. CMAKE_STATIC_LIBRARY_PREFIX_<LANG> overrides this for language <LANG>. CMAKE_STATIC_LIBRARY_SUFFIX The suffix for static libraries that you link to. The suffix to use for the end of a static library filename, .lib on Windows. CMAKE_STATIC_LIBRARY_SUFFIX_<LANG> overrides this for language <LANG>. CMAKE_Swift_MODULE_DIRECTORY New in version 3.15. Swift module output directory. This variable is used to initialize the Swift_MODULE_DIRECTORY property on all the targets. See the target property for additional information. CMAKE_Swift_NUM_THREADS New in version 3.15.1. Number of threads for parallel compilation for Swift targets. This variable controls the number of parallel jobs that the swift driver creates for building targets. If not specified, it will default to the number of logical CPUs on the host. CMAKE_TOOLCHAIN_FILE Path to toolchain file supplied to cmake(1). This variable is specified on the command line when cross-compiling with CMake. It is the path to a file which is read early in the CMake run and which specifies locations for compilers and toolchain utilities, and other target platform and compiler related information. Relative paths are allowed and are interpreted first as relative to the build directory, and if not found, relative to the source directory. This is initialized by the CMAKE_TOOLCHAIN_FILE environment variable if it is set when a new build tree is first created. See the CMAKE_PROJECT_TOP_LEVEL_INCLUDES variable for setting other things not directly related to the toolchain. CMAKE_TWEAK_VERSION Defined to 0 for compatibility with code written for older CMake versions that may have defined higher values. NOTE: In CMake versions 2.8.2 through 2.8.12, this variable holds the fourth version number component of the CMAKE_VERSION variable. CMAKE_VERBOSE_MAKEFILE Enable verbose output from Makefile builds. This variable is a cache entry initialized (to FALSE) by the project() command. Users may enable the option in their local build tree to get more verbose output from Makefile builds and show each command line as it is launched. CMAKE_VERSION The CMake version string as three non-negative integer components separated by . and possibly followed by - and other information. The first two components represent the feature level and the third component represents either a bug-fix level or development date. Release versions and release candidate versions of CMake use the format: <major>.<minor>.<patch>[-rc<n>] where the <patch> component is less than 20000000. Development versions of CMake use the format: <major>.<minor>.<date>[-<id>] where the <date> component is of format CCYYMMDD and <id> may contain arbitrary text. This represents development as of a particular date following the <major>.<minor> feature release. Individual component values are also available in variables: o CMAKE_MAJOR_VERSION o CMAKE_MINOR_VERSION o CMAKE_PATCH_VERSION o CMAKE_TWEAK_VERSION Use the if() command VERSION_LESS, VERSION_GREATER, VERSION_EQUAL, VERSION_LESS_EQUAL, or VERSION_GREATER_EQUAL operators to compare version string values against CMAKE_VERSION using a component-wise test. Version component values may be 10 or larger so do not attempt to compare version strings as floating-point numbers. NOTE: CMake versions 2.8.2 through 2.8.12 used three components for the feature level. Release versions represented the bug-fix level in a fourth component, i.e. <major>.<minor>.<patch>[.<tweak>][-rc<n>]. Development versions represented the development date in the fourth component, i.e. <major>.<minor>.<patch>.<date>[-<id>]. CMake versions prior to 2.8.2 used three components for the feature level and had no bug-fix component. Release versions used an even-valued second component, i.e. <major>.<even-minor>.<patch>[-rc<n>]. Development versions used an odd-valued second component with the development date as the third component, i.e. <major>.<odd-minor>.<date>. The CMAKE_VERSION variable is defined by CMake 2.6.3 and higher. Earlier versions defined only the individual component variables. CMAKE_VS_DEVENV_COMMAND The generators for Visual Studio 9 2008 and above set this variable to the devenv.com command installed with the corresponding Visual Studio version. Note that this variable may be empty on Visual Studio Express editions because they do not provide this tool. This variable is not defined by other generators even if devenv.com is installed on the computer. The CMAKE_VS_MSBUILD_COMMAND is also provided for Visual Studio 10 2010 and above. See also the CMAKE_MAKE_PROGRAM variable. CMAKE_VS_MSBUILD_COMMAND The generators for Visual Studio 10 2010 and above set this variable to the MSBuild.exe command installed with the corresponding Visual Studio version. This variable is not defined by other generators even if MSBuild.exe is installed on the computer. The CMAKE_VS_DEVENV_COMMAND is also provided for the non-Express editions of Visual Studio. See also the CMAKE_MAKE_PROGRAM variable. CMAKE_VS_NsightTegra_VERSION New in version 3.1. When using a Visual Studio generator with the CMAKE_SYSTEM_NAME variable set to Android, this variable contains the version number of the installed NVIDIA Nsight Tegra Visual Studio Edition. CMAKE_VS_NUGET_PACKAGE_RESTORE New in version 3.23. When using a Visual Studio generator, this cache variable controls if msbuild should automatically attempt to restore NuGet packages prior to a build. NuGet packages can be defined using the VS_PACKAGE_REFERENCES property on a target. If no package references are defined, this setting will do nothing. The command line option --resolve-package-references can be used alternatively to control the resolve behavior globally. This option will take precedence over the cache variable. Targets that use the DOTNET_SDK are required to run a restore before building. Disabling this option may cause the build to fail in such projects. This setting is stored as a cache entry. Default value is ON. See also the VS_PACKAGE_REFERENCES property. CMAKE_VS_PLATFORM_NAME New in version 3.1. Visual Studio target platform name used by the current generator. VS 8 and above allow project files to specify a target platform. CMake provides the name of the chosen platform in this variable. See the CMAKE_GENERATOR_PLATFORM variable for details. See also the CMAKE_VS_PLATFORM_NAME_DEFAULT variable. CMAKE_VS_PLATFORM_NAME_DEFAULT New in version 3.14.3. Default for the Visual Studio target platform name for the current generator without considering the value of the CMAKE_GENERATOR_PLATFORM variable. For Visual Studio Generators for VS 2017 and below this is always Win32. For VS 2019 and above this is based on the host platform. See also the CMAKE_VS_PLATFORM_NAME variable. CMAKE_VS_PLATFORM_TOOLSET Visual Studio Platform Toolset name. VS 10 and above use MSBuild under the hood and support multiple compiler toolchains. CMake may specify a toolset explicitly, such as v110 for VS 11 or Windows7.1SDK for 64-bit support in VS 10 Express. CMake provides the name of the chosen toolset in this variable. See the CMAKE_GENERATOR_TOOLSET variable for details. CMAKE_VS_PLATFORM_TOOLSET_CUDA New in version 3.9. NVIDIA CUDA Toolkit version whose Visual Studio toolset to use. The Visual Studio Generators for VS 2010 and above support using a CUDA toolset provided by a CUDA Toolkit. The toolset version number may be specified by a field in CMAKE_GENERATOR_TOOLSET of the form cuda=8.0. Or it is automatically detected if a path to a standalone CUDA directory is specified in the form cuda=C:\path\to\cuda. If none is specified CMake will choose a default version. CMake provides the selected CUDA toolset version in this variable. The value may be empty if no CUDA Toolkit with Visual Studio integration is installed. CMAKE_VS_PLATFORM_TOOLSET_CUDA_CUSTOM_DIR New in version 3.16. Path to standalone NVIDIA CUDA Toolkit (eg. extracted from installer). The Visual Studio Generators for VS 2010 and above support using a standalone (non-installed) NVIDIA CUDA toolkit. The path may be specified by a field in CMAKE_GENERATOR_TOOLSET of the form cuda=C:\path\to\cuda. The given directory must at least contain the nvcc compiler in path .\bin and must provide Visual Studio integration files in path .\extras\visual_studio_integration\ MSBuildExtensions\. One can create a standalone CUDA toolkit directory by either opening a installer with 7zip or copying the files that are extracted by the running installer. The value may be empty if no path to a standalone CUDA Toolkit was specified. CMAKE_VS_PLATFORM_TOOLSET_HOST_ARCHITECTURE New in version 3.8. Visual Studio preferred tool architecture. The Visual Studio Generators for VS 2013 and above support using either the 32-bit or 64-bit host toolchains by specifying a host=x86 or host=x64 value in the CMAKE_GENERATOR_TOOLSET option. CMake provides the selected toolchain architecture preference in this variable (x86, x64, ARM64 or empty). CMAKE_VS_PLATFORM_TOOLSET_VERSION New in version 3.12. Visual Studio Platform Toolset version. The Visual Studio Generators for VS 2017 and above allow to select minor versions of the same toolset. The toolset version number may be specified by a field in CMAKE_GENERATOR_TOOLSET of the form version=14.11. If none is specified CMake will choose a default toolset. The value may be empty if no minor version was selected and the default is used. If the value is not empty, it is the version number that MSBuild uses in its Microsoft.VCToolsVersion.*.props file names. New in version 3.19.7: VS 16.9's toolset may also be specified as 14.28.16.9 because VS 16.10 uses the file name Microsoft.VCToolsVersion.14.28.16.9.props. Three-Component MSVC Toolset Versions New in version 3.19.7. The version= field may be given a three-component toolset version such as 14.28.29910, and CMake will convert it to the name used by MSBuild Microsoft.VCToolsVersion.*.props files. This is useful to distinguish between VS 16.8's 14.28.29333 toolset and VS 16.9's 14.28.29910 toolset. It also matches vcvarsall's -vcvars_ver= behavior. CMAKE_VS_TARGET_FRAMEWORK_VERSION New in version 3.22. Visual Studio target framework version. In some cases, the Visual Studio Generators may use an explicit value for the MSBuild TargetFrameworkVersion setting in .csproj files. CMake provides the chosen value in this variable. See the CMAKE_DOTNET_TARGET_FRAMEWORK_VERSION variable and DOTNET_TARGET_FRAMEWORK_VERSION target property to specify custom TargetFrameworkVersion values for project targets. See also CMAKE_VS_TARGET_FRAMEWORK_IDENTIFIER and CMAKE_VS_TARGET_FRAMEWORK_TARGETS_VERSION. CMAKE_VS_TARGET_FRAMEWORK_IDENTIFIER New in version 3.22. Visual Studio target framework identifier. In some cases, the Visual Studio Generators may use an explicit value for the MSBuild TargetFrameworkIdentifier setting in .csproj files. CMake provides the chosen value in this variable. See also CMAKE_VS_TARGET_FRAMEWORK_VERSION and CMAKE_VS_TARGET_FRAMEWORK_TARGETS_VERSION. CMAKE_VS_TARGET_FRAMEWORK_TARGETS_VERSION New in version 3.22. Visual Studio target framework targets version. In some cases, the Visual Studio Generators may use an explicit value for the MSBuild TargetFrameworkTargetsVersion setting in .csproj files. CMake provides the chosen value in this variable. See also CMAKE_VS_TARGET_FRAMEWORK_VERSION and CMAKE_VS_TARGET_FRAMEWORK_IDENTIFIER. CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION New in version 3.4. Visual Studio Windows Target Platform Version. When targeting Windows 10 and above Visual Studio 2015 and above support specification of a target Windows version to select a corresponding SDK. The CMAKE_SYSTEM_VERSION variable may be set to specify a version. Otherwise CMake computes a default version based on the Windows SDK versions available. The chosen Windows target version number is provided in CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION. If no Windows 10 SDK is available this value will be empty. One may set a CMAKE_WINDOWS_KITS_10_DIR environment variable to an absolute path to tell CMake to look for Windows 10 SDKs in a custom location. The specified directory is expected to contain Include/10.0.* directories. See also CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION_MAXIMUM. CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION_MAXIMUM New in version 3.19. Override the Windows 10 SDK Maximum Version for VS 2015 and beyond. The CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION_MAXIMUM variable may be set to a false value (e.g. OFF, FALSE, or 0) or the SDK version to use as the maximum (e.g. 10.0.14393.0). If unset, the default depends on which version of Visual Studio is targeted by the current generator. This can be used in conjunction with CMAKE_SYSTEM_VERSION, which CMake uses to select CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION. CMAKE_XCODE_BUILD_SYSTEM New in version 3.19. Xcode build system selection. The Xcode generator defines this variable to indicate which variant of the Xcode build system will be used. The value is the version of Xcode in which the corresponding build system first became mature enough for use by CMake. The possible values are: 1 The original Xcode build system. This is the default when using Xcode 11.x or below. 12 The Xcode "new build system" introduced by Xcode 10. It became mature enough for use by CMake in Xcode 12. This is the default when using Xcode 12.x or above. The CMAKE_XCODE_BUILD_SYSTEM variable is informational and should not be modified by project code. See the Toolset and Build System Selection documentation section to select the Xcode build system. CMAKE_XCODE_PLATFORM_TOOLSET Xcode compiler selection. Xcode supports selection of a compiler from one of the installed toolsets. CMake provides the name of the chosen toolset in this variable, if any is explicitly selected (e.g. via the cmake(1) -T option). <PROJECT-NAME>_BINARY_DIR Top level binary directory for the named project. A variable is created with the name used in the project() command, and is the binary directory for the project. This can be useful when add_subdirectory() is used to connect several projects. <PROJECT-NAME>_DESCRIPTION New in version 3.12. Value given to the DESCRIPTION option of the most recent call to the project() command with project name <PROJECT-NAME>, if any. <PROJECT-NAME>_HOMEPAGE_URL New in version 3.12. Value given to the HOMEPAGE_URL option of the most recent call to the project() command with project name <PROJECT-NAME>, if any. <PROJECT-NAME>_IS_TOP_LEVEL New in version 3.21. A boolean variable indicating whether the named project was called in a top level CMakeLists.txt file. To obtain the value from the most recent call to project() in the current directory scope or above, see the PROJECT_IS_TOP_LEVEL variable. The variable value will be true in: o the top-level directory of the project o the top-level directory of an external project added by ExternalProject o a directory added by add_subdirectory() that does not also contain a project() call o a directory added by FetchContent_MakeAvailable(), if the fetched content does not contain a project() call The variable value will be false in: o a directory added by add_subdirectory() that also contains a project() call o a directory added by FetchContent_MakeAvailable(), if the fetched content contains a project() call <PROJECT-NAME>_SOURCE_DIR Top level source directory for the named project. A variable is created with the name used in the project() command, and is the source directory for the project. This can be useful when add_subdirectory() is used to connect several projects. <PROJECT-NAME>_VERSION Value given to the VERSION option of the most recent call to the project() command with project name <PROJECT-NAME>, if any. See also the component-wise version variables <PROJECT-NAME>_VERSION_MAJOR, <PROJECT-NAME>_VERSION_MINOR, <PROJECT-NAME>_VERSION_PATCH, and <PROJECT-NAME>_VERSION_TWEAK. <PROJECT-NAME>_VERSION_MAJOR First version number component of the <PROJECT-NAME>_VERSION variable as set by the project() command. <PROJECT-NAME>_VERSION_MINOR Second version number component of the <PROJECT-NAME>_VERSION variable as set by the project() command. <PROJECT-NAME>_VERSION_PATCH Third version number component of the <PROJECT-NAME>_VERSION variable as set by the project() command. <PROJECT-NAME>_VERSION_TWEAK Fourth version number component of the <PROJECT-NAME>_VERSION variable as set by the project() command. PROJECT_BINARY_DIR Full path to build directory for project. This is the binary directory of the most recent project() command. PROJECT_DESCRIPTION New in version 3.9. Short project description given to the project command. This is the description given to the most recently called project() command in the current directory scope or above. To obtain the description of the top level project, see the CMAKE_PROJECT_DESCRIPTION variable. PROJECT_HOMEPAGE_URL New in version 3.12. The homepage URL of the project. This is the homepage URL given to the most recently called project() command in the current directory scope or above. To obtain the homepage URL of the top level project, see the CMAKE_PROJECT_HOMEPAGE_URL variable. PROJECT_IS_TOP_LEVEL New in version 3.21. A boolean variable indicating whether the most recently called project() command in the current scope or above was in the top level CMakeLists.txt file. Some modules should only be included as part of the top level CMakeLists.txt file to not cause unintended side effects in the build tree, and this variable can be used to conditionally execute such code. For example, consider the CTest module, which creates targets and options: project(MyProject) ... if(PROJECT_IS_TOP_LEVEL) include(CTest) endif() The variable value will be true in: o the top-level directory of the project o the top-level directory of an external project added by ExternalProject o a directory added by add_subdirectory() that does not also contain a project() call o a directory added by FetchContent_MakeAvailable(), if the fetched content does not contain a project() call The variable value will be false in: o a directory added by add_subdirectory() that also contains a project() call o a directory added by FetchContent_MakeAvailable(), if the fetched content contains a project() call PROJECT_NAME Name of the project given to the project command. This is the name given to the most recently called project() command in the current directory scope or above. To obtain the name of the top level project, see the CMAKE_PROJECT_NAME variable. PROJECT_SOURCE_DIR This is the source directory of the last call to the project() command made in the current directory scope or one of its parents. Note, it is not affected by calls to project() made within a child directory scope (i.e. from within a call to add_subdirectory() from the current scope). PROJECT_VERSION Value given to the VERSION option of the most recent call to the project() command, if any. See also the component-wise version variables PROJECT_VERSION_MAJOR, PROJECT_VERSION_MINOR, PROJECT_VERSION_PATCH, and PROJECT_VERSION_TWEAK. PROJECT_VERSION_MAJOR First version number component of the PROJECT_VERSION variable as set by the project() command. PROJECT_VERSION_MINOR Second version number component of the PROJECT_VERSION variable as set by the project() command. PROJECT_VERSION_PATCH Third version number component of the PROJECT_VERSION variable as set by the project() command. PROJECT_VERSION_TWEAK Fourth version number component of the PROJECT_VERSION variable as set by the project() command. VARIABLES THAT CHANGE BEHAVIOR BUILD_SHARED_LIBS Global flag to cause add_library() to create shared libraries if on. If present and true, this will cause all libraries to be built shared unless the library was explicitly added as a static library. This variable is often added to projects as an option() so that each user of a project can decide if they want to build the project using shared or static libraries. CMAKE_ABSOLUTE_DESTINATION_FILES List of files which have been installed using an ABSOLUTE DESTINATION path. This variable is defined by CMake-generated cmake_install.cmake scripts. It can be used (read-only) by programs or scripts that source those install scripts. This is used by some CPack generators (e.g. RPM). CMAKE_APPBUNDLE_PATH Semicolon-separated list of directories specifying a search path for macOS application bundles used by the find_program(), and find_package() commands. CMAKE_AUTOMOC_RELAXED_MODE Deprecated since version 3.15. Switch between strict and relaxed automoc mode. By default, AUTOMOC behaves exactly as described in the documentation of the AUTOMOC target property. When set to TRUE, it accepts more input and tries to find the correct input file for moc even if it differs from the documented behavior. In this mode it e.g. also checks whether a header file is intended to be processed by moc when a "foo.moc" file has been included. Relaxed mode has to be enabled for KDE4 compatibility. CMAKE_BACKWARDS_COMPATIBILITY Deprecated. See CMake Policy CMP0001 documentation. CMAKE_BUILD_TYPE Specifies the build type on single-configuration generators (e.g. Makefile Generators or Ninja). Typical values include Debug, Release, RelWithDebInfo and MinSizeRel, but custom build types can also be defined. This variable is initialized by the first project() or enable_language() command called in a project when a new build tree is first created. If the CMAKE_BUILD_TYPE environment variable is set, its value is used. Otherwise, a toolchain-specific default is chosen when a language is enabled. The default value is often an empty string, but this is usually not desirable and one of the other standard build types is usually more appropriate. Depending on the situation, the value of this variable may be treated case-sensitively or case-insensitively. See Build Configurations for discussion of this and other related topics. For multi-config generators, see CMAKE_CONFIGURATION_TYPES. CMAKE_CLANG_VFS_OVERLAY New in version 3.19. When cross compiling for windows with clang-cl, this variable can be an absolute path pointing to a clang virtual file system yaml file, which will enable clang-cl to resolve windows header names on a case sensitive file system. CMAKE_CODEBLOCKS_COMPILER_ID New in version 3.11. Change the compiler id in the generated CodeBlocks project files. CodeBlocks uses its own compiler id string which differs from CMAKE_<LANG>_COMPILER_ID. If this variable is left empty, CMake tries to recognize the CodeBlocks compiler id automatically. Otherwise the specified string is used in the CodeBlocks project file. See the CodeBlocks documentation for valid compiler id strings. Other IDEs like QtCreator that also use the CodeBlocks generator may ignore this setting. CMAKE_CODEBLOCKS_EXCLUDE_EXTERNAL_FILES New in version 3.10. Change the way the CodeBlocks generator creates project files. If this variable evaluates to ON the generator excludes from the project file any files that are located outside the project root. CMAKE_CODELITE_USE_TARGETS New in version 3.7. Change the way the CodeLite generator creates projectfiles. If this variable evaluates to ON at the end of the top-level CMakeLists.txt file, the generator creates projectfiles based on targets rather than projects. CMAKE_COLOR_DIAGNOSTICS New in version 3.24. Enable color diagnostics throughout. This variable uses three states: ON, OFF and not defined. When not defined: o Makefile Generators initialize the CMAKE_COLOR_MAKEFILE variable to ON. It controls color buildsystem messages. o GNU/Clang compilers are not invoked with any color diagnostics flag. When ON: o Makefile Generators produce color buildsystem messages by default. CMAKE_COLOR_MAKEFILE is not initialized, but may be explicitly set to OFF to disable color buildsystem messages. o GNU/Clang compilers are invoked with a flag enabling color diagnostics (-fcolor-diagnostics). When OFF: o Makefile Generators do not produce color buildsystem messages by default. CMAKE_COLOR_MAKEFILE is not initialized, but may be explicitly set to ON to enable color buildsystem messages. o GNU/Clang compilers are invoked with a flag disabling color diagnostics (-fno-color-diagnostics). If the CMAKE_COLOR_DIAGNOSTICS environment variable is set, its value is used. Otherwise, CMAKE_COLOR_DIAGNOSTICS is not defined by default. CMAKE_COLOR_MAKEFILE Enables color output when using the Makefile Generators. When enabled, the generated Makefiles will produce colored output. Default is ON. CMAKE_CONFIGURATION_TYPES Specifies the available build types (configurations) on multi-config generators (e.g. Visual Studio, Xcode, or Ninja Multi-Config). Typical values include Debug, Release, RelWithDebInfo and MinSizeRel, but custom build types can also be defined. This variable is initialized by the first project() or enable_language() command called in a project when a new build tree is first created. If the CMAKE_CONFIGURATION_TYPES environment variable is set, its value is used. Otherwise, the default value is generator-specific. Depending on the situation, the values in this variable may be treated case-sensitively or case-insensitively. See Build Configurations for discussion of this and other related topics. For single-config generators, see CMAKE_BUILD_TYPE. CMAKE_DEPENDS_IN_PROJECT_ONLY New in version 3.6. When set to TRUE in a directory, the build system produced by the Makefile Generators is set up to only consider dependencies on source files that appear either in the source or in the binary directories. Changes to source files outside of these directories will not cause rebuilds. This should be used carefully in cases where some source files are picked up through external headers during the build. CMAKE_DISABLE_FIND_PACKAGE_<PackageName> Variable for disabling find_package() calls. Every non-REQUIRED find_package() call in a project can be disabled by setting the variable CMAKE_DISABLE_FIND_PACKAGE_<PackageName> to TRUE. This can be used to build a project without an optional package, although that package is installed. This switch should be used during the initial CMake run. Otherwise if the package has already been found in a previous CMake run, the variables which have been stored in the cache will still be there. In that case it is recommended to remove the cache variables for this package from the cache using the cache editor or cmake(1) -U See also the CMAKE_REQUIRE_FIND_PACKAGE_<PackageName> variable. CMAKE_ECLIPSE_GENERATE_LINKED_RESOURCES New in version 3.6. This cache variable is used by the Eclipse project generator. See cmake-generators(7). The Eclipse project generator generates so-called linked resources e.g. to the subproject root dirs in the source tree or to the source files of targets. This can be disabled by setting this variable to FALSE. CMAKE_ECLIPSE_GENERATE_SOURCE_PROJECT New in version 3.6. This cache variable is used by the Eclipse project generator. See cmake-generators(7). If this variable is set to TRUE, the Eclipse project generator will generate an Eclipse project in CMAKE_SOURCE_DIR . This project can then be used in Eclipse e.g. for the version control functionality. CMAKE_ECLIPSE_GENERATE_SOURCE_PROJECT defaults to FALSE; so nothing is written into the source directory. CMAKE_ECLIPSE_MAKE_ARGUMENTS New in version 3.6. This cache variable is used by the Eclipse project generator. See cmake-generators(7). This variable holds arguments which are used when Eclipse invokes the make tool. By default it is initialized to hold flags to enable parallel builds (using -j typically). CMAKE_ECLIPSE_RESOURCE_ENCODING New in version 3.16. This cache variable tells the Eclipse CDT4 project generator to set the resource encoding to the given value in generated project files. If no value is given, no encoding will be set. CMAKE_ECLIPSE_VERSION New in version 3.6. This cache variable is used by the Eclipse project generator. See cmake-generators(7). When using the Eclipse project generator, CMake tries to find the Eclipse executable and detect the version of it. Depending on the version it finds, some features are enabled or disabled. If CMake doesn't find Eclipse, it assumes the oldest supported version, Eclipse Callisto (3.2). CMAKE_ERROR_DEPRECATED Whether to issue errors for deprecated functionality. If TRUE, use of deprecated functionality will issue fatal errors. If this variable is not set, CMake behaves as if it were set to FALSE. CMAKE_ERROR_ON_ABSOLUTE_INSTALL_DESTINATION Ask cmake_install.cmake script to error out as soon as a file with absolute INSTALL DESTINATION is encountered. The fatal error is emitted before the installation of the offending file takes place. This variable is used by CMake-generated cmake_install.cmake scripts. If one sets this variable to ON while running the script, it may get fatal error messages from the script. CMAKE_EXECUTE_PROCESS_COMMAND_ECHO New in version 3.15. If this variable is set to STDERR, STDOUT or NONE then commands in execute_process() calls will be printed to either stderr or stdout or not at all. CMAKE_EXPORT_COMPILE_COMMANDS New in version 3.5. Enable/Disable output of compile commands during generation. If enabled, generates a compile_commands.json file containing the exact compiler calls for all translation units of the project in machine-readable form. The format of the JSON file looks like: [ { "directory": "/home/user/development/project", "command": "/usr/bin/c++ ... -c ../foo/foo.cc", "file": "../foo/foo.cc" }, ... { "directory": "/home/user/development/project", "command": "/usr/bin/c++ ... -c ../foo/bar.cc", "file": "../foo/bar.cc" } ] This is initialized by the CMAKE_EXPORT_COMPILE_COMMANDS environment variable, and initializes the EXPORT_COMPILE_COMMANDS target property for all targets. NOTE: This option is implemented only by Makefile Generators and the Ninja. It is ignored on other generators. This option currently does not work well in combination with the UNITY_BUILD target property or the CMAKE_UNITY_BUILD variable. CMAKE_EXPORT_PACKAGE_REGISTRY New in version 3.15. Enables the export(PACKAGE) command when CMP0090 is set to NEW. The export(PACKAGE) command does nothing by default. In some cases it is desirable to write to the user package registry, so the CMAKE_EXPORT_PACKAGE_REGISTRY variable may be set to enable it. If CMP0090 is not set to NEW this variable does nothing, and the CMAKE_EXPORT_NO_PACKAGE_REGISTRY variable controls the behavior instead. See also Disabling the Package Registry. CMAKE_EXPORT_NO_PACKAGE_REGISTRY New in version 3.1. Disable the export(PACKAGE) command when CMP0090 is not set to NEW. In some cases, for example for packaging and for system wide installations, it is not desirable to write the user package registry. If the CMAKE_EXPORT_NO_PACKAGE_REGISTRY variable is enabled, the export(PACKAGE) command will do nothing. If CMP0090 is set to NEW this variable does nothing, and the CMAKE_EXPORT_PACKAGE_REGISTRY variable controls the behavior instead. See also Disabling the Package Registry. CMAKE_FIND_APPBUNDLE New in version 3.4. This variable affects how find_* commands choose between macOS Application Bundles and unix-style package components. On Darwin or systems supporting macOS Application Bundles, the CMAKE_FIND_APPBUNDLE variable can be set to empty or one of the following: FIRST Try to find application bundles before standard programs. This is the default on Darwin. LAST Try to find application bundles after standard programs. ONLY Only try to find application bundles. NEVER Never try to find application bundles. CMAKE_FIND_FRAMEWORK New in version 3.4. This variable affects how find_* commands choose between macOS Frameworks and unix-style package components. On Darwin or systems supporting macOS Frameworks, the CMAKE_FIND_FRAMEWORK variable can be set to empty or one of the following: FIRST Try to find frameworks before standard libraries or headers. This is the default on Darwin. LAST Try to find frameworks after standard libraries or headers. ONLY Only try to find frameworks. NEVER Never try to find frameworks. CMAKE_FIND_LIBRARY_CUSTOM_LIB_SUFFIX New in version 3.9. Specify a <suffix> to tell the find_library() command to search in a lib<suffix> directory before each lib directory that would normally be searched. This overrides the behavior of related global properties: o FIND_LIBRARY_USE_LIB32_PATHS o FIND_LIBRARY_USE_LIB64_PATHS o FIND_LIBRARY_USE_LIBX32_PATHS CMAKE_FIND_LIBRARY_PREFIXES Prefixes to prepend when looking for libraries. This specifies what prefixes to add to library names when the find_library() command looks for libraries. On UNIX systems this is typically lib, meaning that when trying to find the foo library it will look for libfoo. CMAKE_FIND_LIBRARY_SUFFIXES Suffixes to append when looking for libraries. This specifies what suffixes to add to library names when the find_library() command looks for libraries. On Windows systems this is typically .lib and, depending on the compiler, .dll.a, .a (e.g. GCC and Clang), so when it tries to find the foo library, it will look for [<prefix>]foo.lib and/or [<prefix>]foo[.dll].a, depending on the compiler used and the <prefix> specified in the CMAKE_FIND_LIBRARY_PREFIXES. CMAKE_FIND_NO_INSTALL_PREFIX Exclude the values of the CMAKE_INSTALL_PREFIX and CMAKE_STAGING_PREFIX variables from CMAKE_SYSTEM_PREFIX_PATH. CMake adds these project-destination prefixes to CMAKE_SYSTEM_PREFIX_PATH by default in order to support building a series of dependent packages and installing them into a common prefix. Set CMAKE_FIND_NO_INSTALL_PREFIX to TRUE to suppress this behavior. The CMAKE_SYSTEM_PREFIX_PATH is initialized on the first call to a project() or enable_language() command. Therefore one must set CMAKE_FIND_NO_INSTALL_PREFIX before this in order to take effect. A user may set the variable as a cache entry on the command line to achieve this. Note that the prefix(es) may still be searched for other reasons, such as being the same prefix as the CMake installation, or for being a built-in system prefix. CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY New in version 3.1. Deprecated since version 3.16: Use the CMAKE_FIND_USE_PACKAGE_REGISTRY variable instead. By default this variable is not set. If neither CMAKE_FIND_USE_PACKAGE_REGISTRY nor CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY is set, then find_package() will use the User Package Registry unless the NO_CMAKE_PACKAGE_REGISTRY option is provided. CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY is ignored if CMAKE_FIND_USE_PACKAGE_REGISTRY is set. In some cases, for example to locate only system wide installations, it is not desirable to use the User Package Registry when searching for packages. If the CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY variable is TRUE, all the find_package() commands will skip the User Package Registry as if they were called with the NO_CMAKE_PACKAGE_REGISTRY argument. See also Disabling the Package Registry. CMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY New in version 3.1. Deprecated since version 3.16: Use the CMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY variable instead. By default this variable is not set. If neither CMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY nor CMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY is set, then find_package() will use the System Package Registry unless the NO_CMAKE_SYSTEM_PACKAGE_REGISTRY option is provided. CMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY is ignored if CMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY is set. In some cases, it is not desirable to use the System Package Registry when searching for packages. If the CMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY variable is TRUE, all the find_package() commands will skip the System Package Registry as if they were called with the NO_CMAKE_SYSTEM_PACKAGE_REGISTRY argument. See also Disabling the Package Registry. CMAKE_FIND_PACKAGE_PREFER_CONFIG New in version 3.15. Tell find_package() to try "Config" mode before "Module" mode if no mode was specified. The command find_package() operates without an explicit mode when the reduced signature is used without the MODULE option. In this case, by default, CMake first tries Module mode by searching for a Find<pkg>.cmake module. If it fails, CMake then searches for the package using Config mode. Set CMAKE_FIND_PACKAGE_PREFER_CONFIG to TRUE to tell find_package() to first search using Config mode before falling back to Module mode. This variable may be useful when a developer has compiled a custom version of a common library and wishes to link it to a dependent project. If this variable is set to TRUE, it would prevent a dependent project's call to find_package() from selecting the default library located by the system's Find<pkg>.cmake module before finding the developer's custom built library. Once this variable is set, it is the responsibility of the exported <pkg>Config.cmake files to provide the same result variables as the Find<pkg>.cmake modules so that dependent projects can use them interchangeably. CMAKE_FIND_PACKAGE_RESOLVE_SYMLINKS New in version 3.14. Set to TRUE to tell find_package() calls to resolve symbolic links in the value of <PackageName>_DIR. This is helpful in use cases where the package search path points at a proxy directory in which symlinks to the real package locations appear. This is not enabled by default because there are also common use cases in which the symlinks should be preserved. CMAKE_FIND_PACKAGE_TARGETS_GLOBAL New in version 3.24. Setting to TRUE promotes all IMPORTED targets discoverd by find_package() to a GLOBAL scope. Setting this to TRUE is akin to specifying GLOBAL as an argument to find_package(). Default value is OFF. CMAKE_FIND_PACKAGE_WARN_NO_MODULE Tell find_package() to warn if called without an explicit mode. If find_package() is called without an explicit mode option (MODULE, CONFIG, or NO_MODULE) and no Find<pkg>.cmake module is in CMAKE_MODULE_PATH then CMake implicitly assumes that the caller intends to search for a package configuration file. If no package configuration file is found then the wording of the failure message must account for both the case that the package is really missing and the case that the project has a bug and failed to provide the intended Find module. If instead the caller specifies an explicit mode option then the failure message can be more specific. Set CMAKE_FIND_PACKAGE_WARN_NO_MODULE to TRUE to tell find_package() to warn when it implicitly assumes Config mode. This helps developers enforce use of an explicit mode in all calls to find_package() within a project. This variable has no effect if CMAKE_FIND_PACKAGE_PREFER_CONFIG is set to TRUE. CMAKE_FIND_ROOT_PATH Semicolon-separated list of root paths to search on the filesystem. This variable is most useful when cross-compiling. CMake uses the paths in this list as alternative roots to find filesystem items with find_package(), find_library() etc. CMAKE_FIND_ROOT_PATH_MODE_INCLUDE This variable controls whether the CMAKE_FIND_ROOT_PATH and CMAKE_SYSROOT are used by find_file() and find_path(). If set to ONLY, then only the roots in CMAKE_FIND_ROOT_PATH will be searched. If set to NEVER, then the roots in CMAKE_FIND_ROOT_PATH will be ignored and only the host system root will be used. If set to BOTH, then the host system paths and the paths in CMAKE_FIND_ROOT_PATH will be searched. CMAKE_FIND_ROOT_PATH_MODE_LIBRARY This variable controls whether the CMAKE_FIND_ROOT_PATH and CMAKE_SYSROOT are used by find_library(). If set to ONLY, then only the roots in CMAKE_FIND_ROOT_PATH will be searched. If set to NEVER, then the roots in CMAKE_FIND_ROOT_PATH will be ignored and only the host system root will be used. If set to BOTH, then the host system paths and the paths in CMAKE_FIND_ROOT_PATH will be searched. CMAKE_FIND_ROOT_PATH_MODE_PACKAGE This variable controls whether the CMAKE_FIND_ROOT_PATH and CMAKE_SYSROOT are used by find_package(). If set to ONLY, then only the roots in CMAKE_FIND_ROOT_PATH will be searched. If set to NEVER, then the roots in CMAKE_FIND_ROOT_PATH will be ignored and only the host system root will be used. If set to BOTH, then the host system paths and the paths in CMAKE_FIND_ROOT_PATH will be searched. CMAKE_FIND_ROOT_PATH_MODE_PROGRAM This variable controls whether the CMAKE_FIND_ROOT_PATH and CMAKE_SYSROOT are used by find_program(). If set to ONLY, then only the roots in CMAKE_FIND_ROOT_PATH will be searched. If set to NEVER, then the roots in CMAKE_FIND_ROOT_PATH will be ignored and only the host system root will be used. If set to BOTH, then the host system paths and the paths in CMAKE_FIND_ROOT_PATH will be searched. CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH New in version 3.16. Controls the default behavior of the following commands for whether or not to search paths provided by cmake-specific environment variables: o find_program() o find_library() o find_file() o find_path() o find_package() This is useful in cross-compiling environments. By default this variable is not set, which is equivalent to it having a value of TRUE. Explicit options given to the above commands take precedence over this variable. See also the CMAKE_FIND_USE_CMAKE_PATH, CMAKE_FIND_USE_CMAKE_SYSTEM_PATH, CMAKE_FIND_USE_INSTALL_PREFIX, CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH, CMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY, CMAKE_FIND_USE_PACKAGE_REGISTRY, and CMAKE_FIND_USE_PACKAGE_ROOT_PATH variables. CMAKE_FIND_USE_INSTALL_PREFIX New in version 3.24. Controls the default behavior of the following commands for whether or not to search the install location: o find_program() o find_library() o find_file() o find_path() o find_package() This is useful in cross-compiling environments. Due to backwards compatibility with CMAKE_FIND_NO_INSTALL_PREFIX, the behavior of the find command change based on if this variable exists. +------------------------------+------------------------------+--------+ |CMAKE_FIND_USE_INSTALL_PREFIX | CMAKE_FIND_NO_INSTALL_PREFIX | Search | +------------------------------+------------------------------+--------+ |Not Defined | On | NO | +------------------------------+------------------------------+--------+ |Not Defined | Off || Not Defined | YES | +------------------------------+------------------------------+--------+ |Off | On | NO | +------------------------------+------------------------------+--------+ |Off | Off || Not Defined | NO | +------------------------------+------------------------------+--------+ |On | On | YES | +------------------------------+------------------------------+--------+ |On | Off || Not Defined | YES | +------------------------------+------------------------------+--------+ By default this variable is not defined. Explicit options given to the above commands take precedence over this variable. See also the CMAKE_FIND_USE_CMAKE_PATH, CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH, CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH, CMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY, CMAKE_FIND_USE_PACKAGE_REGISTRY, and CMAKE_FIND_USE_PACKAGE_ROOT_PATH variables. CMAKE_FIND_USE_CMAKE_PATH New in version 3.16. Controls the default behavior of the following commands for whether or not to search paths provided by cmake-specific cache variables: o find_program() o find_library() o find_file() o find_path() o find_package() This is useful in cross-compiling environments. By default this variable is not set, which is equivalent to it having a value of TRUE. Explicit options given to the above commands take precedence over this variable. See also the CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH, CMAKE_FIND_USE_CMAKE_SYSTEM_PATH, CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH, CMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY, CMAKE_FIND_USE_PACKAGE_REGISTRY, and CMAKE_FIND_USE_PACKAGE_ROOT_PATH variables. CMAKE_FIND_USE_CMAKE_SYSTEM_PATH New in version 3.16. Controls the default behavior of the following commands for whether or not to search paths provided by platform-specific cmake variables: o find_program() o find_library() o find_file() o find_path() o find_package() This is useful in cross-compiling environments. By default this variable is not set, which is equivalent to it having a value of TRUE. Explicit options given to the above commands take precedence over this variable. See also the CMAKE_FIND_USE_CMAKE_PATH, CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH, CMAKE_FIND_USE_INSTALL_PREFIX, CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH, CMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY, CMAKE_FIND_USE_PACKAGE_REGISTRY, and CMAKE_FIND_USE_PACKAGE_ROOT_PATH variables. CMAKE_FIND_USE_PACKAGE_REGISTRY New in version 3.16. Controls the default behavior of the find_package() command for whether or not to search paths provided by the User Package Registry. By default this variable is not set and the behavior will fall back to that determined by the deprecated CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY variable. If that is also not set, then find_package() will use the User Package Registry unless the NO_CMAKE_PACKAGE_REGISTRY option is provided. This variable takes precedence over CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY when both are set. In some cases, for example to locate only system wide installations, it is not desirable to use the User Package Registry when searching for packages. If the CMAKE_FIND_USE_PACKAGE_REGISTRY variable is FALSE, all the find_package() commands will skip the User Package Registry as if they were called with the NO_CMAKE_PACKAGE_REGISTRY argument. See also Disabling the Package Registry and the CMAKE_FIND_USE_CMAKE_PATH, CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH, CMAKE_FIND_USE_INSTALL_PREFIX, CMAKE_FIND_USE_CMAKE_SYSTEM_PATH, CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH, CMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY, and CMAKE_FIND_USE_PACKAGE_ROOT_PATH variables. CMAKE_FIND_USE_PACKAGE_ROOT_PATH New in version 3.16. Controls the default behavior of the following commands for whether or not to search paths provided by <PackageName>_ROOT variables: o find_program() o find_library() o find_file() o find_path() o find_package() By default this variable is not set, which is equivalent to it having a value of TRUE. Explicit options given to the above commands take precedence over this variable. See also the CMAKE_FIND_USE_CMAKE_PATH, CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH, CMAKE_FIND_USE_INSTALL_PREFIX, CMAKE_FIND_USE_CMAKE_SYSTEM_PATH, CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH, CMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY, and CMAKE_FIND_USE_PACKAGE_REGISTRY variables. CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH New in version 3.16. Controls the default behavior of the following commands for whether or not to search paths provided by standard system environment variables: o find_program() o find_library() o find_file() o find_path() o find_package() This is useful in cross-compiling environments. By default this variable is not set, which is equivalent to it having a value of TRUE. Explicit options given to the above commands take precedence over this variable. See also the CMAKE_FIND_USE_CMAKE_PATH, CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH, CMAKE_FIND_USE_INSTALL_PREFIX, CMAKE_FIND_USE_CMAKE_SYSTEM_PATH, CMAKE_FIND_USE_PACKAGE_REGISTRY, CMAKE_FIND_USE_PACKAGE_ROOT_PATH, and CMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY variables. CMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY New in version 3.16. Controls searching the System Package Registry by the find_package() command. By default this variable is not set and the behavior will fall back to that determined by the deprecated CMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY variable. If that is also not set, then find_package() will use the System Package Registry unless the NO_CMAKE_SYSTEM_PACKAGE_REGISTRY option is provided. This variable takes precedence over CMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY when both are set. In some cases, for example to locate only user specific installations, it is not desirable to use the System Package Registry when searching for packages. If the CMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY variable is FALSE, all the find_package() commands will skip the System Package Registry as if they were called with the NO_CMAKE_SYSTEM_PACKAGE_REGISTRY argument. See also Disabling the Package Registry. See also the CMAKE_FIND_USE_CMAKE_PATH, CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH, CMAKE_FIND_USE_INSTALL_PREFIX, CMAKE_FIND_USE_CMAKE_SYSTEM_PATH, CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH, CMAKE_FIND_USE_PACKAGE_REGISTRY, and CMAKE_FIND_USE_PACKAGE_ROOT_PATH variables. CMAKE_FRAMEWORK_PATH Semicolon-separated list of directories specifying a search path for macOS frameworks used by the find_library(), find_package(), find_path(), and find_file() commands. CMAKE_IGNORE_PATH Semicolon-separated list of directories to be ignored by the various find...() commands. For find_program(), find_library(), find_file(), and find_path(), any file found in one of the listed directories will be ignored. The listed directories do not apply recursively, so any subdirectories to be ignored must also be explicitly listed. CMAKE_IGNORE_PATH does not affect the search prefixes used by these four commands. To ignore individual paths under a search prefix (e.g. bin, include, lib, etc.), each path must be listed in CMAKE_IGNORE_PATH as a full absolute path. CMAKE_IGNORE_PREFIX_PATH provides a more appropriate way to ignore a whole search prefix. find_package() is also affected by CMAKE_IGNORE_PATH, but only for Config mode searches. Any <Name>Config.cmake or <name>-config.cmake file found in one of the specified directories will be ignored. In addition, any search prefix found in CMAKE_IGNORE_PATH will be skipped for backward compatibility reasons, but new code should prefer to use CMAKE_IGNORE_PREFIX_PATH to ignore prefixes instead. Ignoring search locations can be useful in cross-compiling environments where some system directories contain incompatible but possibly linkable libraries. For example, on cross-compiled cluster environments, this allows a user to ignore directories containing libraries meant for the front-end machine. By default, CMAKE_IGNORE_PATH is empty. It is intended to be set by the project or the end user. See also the following variables: o CMAKE_IGNORE_PREFIX_PATH o CMAKE_SYSTEM_IGNORE_PATH o CMAKE_PREFIX_PATH o CMAKE_LIBRARY_PATH o CMAKE_INCLUDE_PATH o CMAKE_PROGRAM_PATH CMAKE_IGNORE_PREFIX_PATH New in version 3.23. Semicolon-separated list of search prefixes to be ignored by the find_program(), find_library(), find_file(), and find_path() commands. The prefixes are also ignored by the Config mode of the find_package() command (Module mode is unaffected). To ignore specific directories instead, see CMAKE_IGNORE_PATH. Ignoring search locations can be useful in cross-compiling environments where some system directories contain incompatible but possibly linkable libraries. For example, on cross-compiled cluster environments, this allows a user to ignore directories containing libraries meant for the front-end machine. By default, CMAKE_IGNORE_PREFIX_PATH is empty. It is intended to be set by the project or the end user. See also the following variables: o CMAKE_IGNORE_PATH o CMAKE_SYSTEM_IGNORE_PREFIX_PATH o CMAKE_PREFIX_PATH o CMAKE_LIBRARY_PATH o CMAKE_INCLUDE_PATH o CMAKE_PROGRAM_PATH CMAKE_INCLUDE_DIRECTORIES_BEFORE Whether to append or prepend directories by default in include_directories(). This variable affects the default behavior of the include_directories() command. Setting this variable to ON is equivalent to using the BEFORE option in all uses of that command. CMAKE_INCLUDE_DIRECTORIES_PROJECT_BEFORE Whether to force prepending of project include directories. This variable affects the order of include directories generated in compiler command lines. If set to ON, it causes the CMAKE_SOURCE_DIR and the CMAKE_BINARY_DIR to appear first. CMAKE_INCLUDE_PATH Semicolon-separated list of directories specifying a search path for the find_file() and find_path() commands. By default it is empty, it is intended to be set by the project. See also CMAKE_SYSTEM_INCLUDE_PATH and CMAKE_PREFIX_PATH. CMAKE_INSTALL_DEFAULT_COMPONENT_NAME Default component used in install() commands. If an install() command is used without the COMPONENT argument, these files will be grouped into a default component. The name of this default install component will be taken from this variable. It defaults to Unspecified. CMAKE_INSTALL_DEFAULT_DIRECTORY_PERMISSIONS New in version 3.11. Default permissions for directories created implicitly during installation of files by install() and file(INSTALL). If make install is invoked and directories are implicitly created they get permissions set by CMAKE_INSTALL_DEFAULT_DIRECTORY_PERMISSIONS variable or platform specific default permissions if the variable is not set. Implicitly created directories are created if they are not explicitly installed by install() command but are needed to install a file on a certain path. Example of such locations are directories created due to the setting of CMAKE_INSTALL_PREFIX. Expected content of the CMAKE_INSTALL_DEFAULT_DIRECTORY_PERMISSIONS variable is a list of permissions that can be used by install() command PERMISSIONS section. Example usage: set(CMAKE_INSTALL_DEFAULT_DIRECTORY_PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ ) CMAKE_INSTALL_MESSAGE New in version 3.1. Specify verbosity of installation script code generated by the install() command (using the file(INSTALL) command). For paths that are newly installed or updated, installation may print lines like: -- Installing: /some/destination/path For paths that are already up to date, installation may print lines like: -- Up-to-date: /some/destination/path The CMAKE_INSTALL_MESSAGE variable may be set to control which messages are printed: ALWAYS Print both Installing and Up-to-date messages. LAZY Print Installing but not Up-to-date messages. NEVER Print neither Installing nor Up-to-date messages. Other values have undefined behavior and may not be diagnosed. If this variable is not set, the default behavior is ALWAYS. CMAKE_INSTALL_PREFIX Install directory used by install(). If make install is invoked or INSTALL is built, this directory is prepended onto all install directories. This variable defaults to /usr/local on UNIX and c:/Program Files/${PROJECT_NAME} on Windows.
See CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT for how a project might
choose its own default.

On UNIX one can use the DESTDIR mechanism in order to relocate the
whole installation to a staging area.  See the DESTDIR environment

The installation prefix is also added to CMAKE_SYSTEM_PREFIX_PATH so
that find_package(), find_program(), find_library(), find_path(), and
find_file() will search the prefix for other software. This behavior
can be disabled by setting the CMAKE_FIND_NO_INSTALL_PREFIX to TRUE
before the first project() invocation.

NOTE:
Use the GNUInstallDirs module to provide GNU-style options for the
layout of directories within the installation.

The CMAKE_INSTALL_PREFIX may be defined when configuring a build tree
to set its installation prefix.  Or, when using the cmake(1)
command-line tool's --install mode, one may specify a different prefix
using the --prefix option:

cmake --install . --prefix /my/install/prefix

CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT
New in version 3.7.1.

CMake sets this variable to a TRUE value when the CMAKE_INSTALL_PREFIX
has just been initialized to its default value, typically on the first
run of CMake within a new build tree.  This can be used by project code
to change the default without overriding a user-provided value:

if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
set(CMAKE_INSTALL_PREFIX "/my/default" CACHE PATH "..." FORCE)
endif()

CMAKE_LIBRARY_PATH
Semicolon-separated list of directories specifying a search path for
the find_library() command.  By default it is empty, it is intended to
be set by the project.  See also CMAKE_SYSTEM_LIBRARY_PATH and
CMAKE_PREFIX_PATH.

New in version 3.13.

Whether to append or prepend directories by default in

This variable affects the default behavior of the link_directories()
command.  Setting this variable to ON is equivalent to using the BEFORE
option in all uses of that command.

New in version 3.23.

Set this variable to initialize the LINK_LIBRARIES_ONLY_TARGETS
property of non-imported targets when they are created.  Setting it to
true enables an additional check that all items named by
target_link_libraries() that can be target names are actually names of
existing targets.  See the target property documentation for details.

CMAKE_MFC_FLAG
Use the MFC library for an executable or dll.

Enables the use of the Microsoft Foundation Classes (MFC).  It should
be set to 1 for the static MFC library, and 2 for the shared MFC
library.  This is used in Visual Studio project files.

Usage example:

set(CMAKE_MFC_FLAG 2)
add_executable(CMakeSetup WIN32 ${SRCS}) Contents of CMAKE_MFC_FLAG may use generator expressions. CMAKE_MAXIMUM_RECURSION_DEPTH New in version 3.14. Maximum recursion depth for CMake scripts. It is intended to be set on the command line with -DCMAKE_MAXIMUM_RECURSION_DEPTH=<x>, or within CMakeLists.txt by projects that require a large recursion depth. Projects that set this variable should provide the user with a way to override it. For example: # About to perform deeply recursive actions if(NOT CMAKE_MAXIMUM_RECURSION_DEPTH) set(CMAKE_MAXIMUM_RECURSION_DEPTH 2000) endif() If it is not set, or is set to a non-integer value, a sensible default limit is used. If the recursion limit is reached, the script terminates immediately with a fatal error. Calling any of the following commands increases the recursion depth: o include() o find_package() o add_subdirectory() o try_compile() o ctest_read_custom_files() o ctest_run_script() (unless NEW_PROCESS is specified) o User-defined function()'s and macro()'s (note that function() and macro() themselves don't increase recursion depth) o Reading or writing variables that are being watched by a variable_watch() CMAKE_MESSAGE_CONTEXT New in version 3.17. When enabled by the cmake --log-context command line option or the CMAKE_MESSAGE_CONTEXT_SHOW variable, the message() command converts the CMAKE_MESSAGE_CONTEXT list into a dot-separated string surrounded by square brackets and prepends it to each line for messages of log levels NOTICE and below. For logging contexts to work effectively, projects should generally APPEND and POP_BACK an item to the current value of CMAKE_MESSAGE_CONTEXT rather than replace it. Projects should not assume the message context at the top of the source tree is empty, as there are scenarios where the context might have already been set (e.g. hierarchical projects). WARNING: Valid context names are restricted to anything that could be used as a CMake variable name. All names that begin with an underscore or the string cmake_ are also reserved for use by CMake and should not be used by projects. Example: function(bar) list(APPEND CMAKE_MESSAGE_CONTEXT "bar") message(VERBOSE "bar VERBOSE message") endfunction() function(baz) list(APPEND CMAKE_MESSAGE_CONTEXT "baz") message(DEBUG "baz DEBUG message") endfunction() function(foo) list(APPEND CMAKE_MESSAGE_CONTEXT "foo") bar() message(TRACE "foo TRACE message") baz() endfunction() list(APPEND CMAKE_MESSAGE_CONTEXT "top") message(VERBOSE "Before foo") foo() message(VERBOSE "After foo") list(POP_BACK CMAKE_MESSAGE_CONTEXT) Which results in the following output: -- [top] Before foo -- [top.foo.bar] bar VERBOSE message -- [top.foo] foo TRACE message -- [top.foo.baz] baz DEBUG message -- [top] After foo CMAKE_MESSAGE_CONTEXT_SHOW New in version 3.17. Setting this variable to true enables showing a context with each line logged by the message() command (see CMAKE_MESSAGE_CONTEXT for how the context itself is specified). This variable is an alternative to providing the --log-context option on the cmake command line. Whereas the command line option will apply only to that one CMake run, setting CMAKE_MESSAGE_CONTEXT_SHOW to true as a cache variable will ensure that subsequent CMake runs will continue to show the message context. Projects should not set CMAKE_MESSAGE_CONTEXT_SHOW. It is intended for users so that they may control whether or not to include context with messages. CMAKE_MESSAGE_INDENT New in version 3.16. The message() command joins the strings from this list and for log levels of NOTICE and below, it prepends the resultant string to each line of the message. Example: list(APPEND listVar one two three) message(VERBOSE [[Collected items in the "listVar":]]) list(APPEND CMAKE_MESSAGE_INDENT " ") foreach(item IN LISTS listVar) message(VERBOSE${item})
endforeach()

list(POP_BACK CMAKE_MESSAGE_INDENT)
message(VERBOSE "No more indent")

Which results in the following output:

-- Collected items in the "listVar":
--   one
--   two
--   three
-- No more indent

CMAKE_MESSAGE_LOG_LEVEL
New in version 3.17.

When set, this variable specifies the logging level used by the
message() command.  Valid values are the same as those for the
--log-level command line option of the cmake(1) program.  If this
variable is set and the --log-level command line option is given, the
command line option takes precedence.

The main advantage to using this variable is to make a log level
persist between CMake runs.  Setting it as a cache variable will ensure
that subsequent CMake runs will continue to use the chosen log level.

Projects should not set this variable, it is intended for users so that
they may control the log level according to their own needs.

CMAKE_MODULE_PATH
Semicolon-separated list of directories specifying a search path for
CMake modules to be loaded by the include() or find_package() commands
before checking the default modules that come with CMake.  By default
it is empty, it is intended to be set by the project.

CMAKE_POLICY_DEFAULT_CMP<NNNN>
Default for CMake Policy CMP<NNNN> when it is otherwise left unset.

Commands cmake_minimum_required(VERSION) and cmake_policy(VERSION) by
default leave policies introduced after the given version unset.  Set
CMAKE_POLICY_DEFAULT_CMP<NNNN> to OLD or NEW to specify the default for
policy CMP<NNNN>, where <NNNN> is the policy number.

This variable should not be set by a project in CMake code as a way to
set its own policies; use cmake_policy(SET) instead.  This variable is
meant to externally set policies for which a project has not itself
been updated:

o Users running CMake may set this variable in the cache (e.g.
-DCMAKE_POLICY_DEFAULT_CMP<NNNN>=<OLD|NEW>).  Set it to OLD to quiet
a policy warning while using old behavior or to NEW to try building
the project with new behavior.

o Projects may set this variable before a call to add_subdirectory()
that adds a third-party project in order to set its policies without
modifying third-party code.

CMAKE_POLICY_WARNING_CMP<NNNN>
Explicitly enable or disable the warning when CMake Policy CMP<NNNN>
has not been set explicitly by cmake_policy() or implicitly by
cmake_minimum_required(). This is meaningful only for the policies that
do not warn by default:

o CMAKE_POLICY_WARNING_CMP0025 controls the warning for policy CMP0025.

o CMAKE_POLICY_WARNING_CMP0047 controls the warning for policy CMP0047.

o CMAKE_POLICY_WARNING_CMP0056 controls the warning for policy CMP0056.

o CMAKE_POLICY_WARNING_CMP0060 controls the warning for policy CMP0060.

o CMAKE_POLICY_WARNING_CMP0065 controls the warning for policy CMP0065.

o CMAKE_POLICY_WARNING_CMP0066 controls the warning for policy CMP0066.

o CMAKE_POLICY_WARNING_CMP0067 controls the warning for policy CMP0067.

o CMAKE_POLICY_WARNING_CMP0082 controls the warning for policy CMP0082.

o CMAKE_POLICY_WARNING_CMP0089 controls the warning for policy CMP0089.

o CMAKE_POLICY_WARNING_CMP0102 controls the warning for policy CMP0102.

o CMAKE_POLICY_WARNING_CMP0112 controls the warning for policy CMP0112.

o CMAKE_POLICY_WARNING_CMP0116 controls the warning for policy CMP0116.

o CMAKE_POLICY_WARNING_CMP0126 controls the warning for policy CMP0126.

o CMAKE_POLICY_WARNING_CMP0128 controls the warning for policy CMP0128.

o CMAKE_POLICY_WARNING_CMP0129 controls the warning for policy CMP0129.

o CMAKE_POLICY_WARNING_CMP0133 controls the warning for policy CMP0133.

This variable should not be set by a project in CMake code.  Project
developers running CMake may set this variable in their cache to enable
the warning (e.g. -DCMAKE_POLICY_WARNING_CMP<NNNN>=ON).  Alternatively,
running cmake(1) with the --debug-output, --trace, or --trace-expand
option will also enable the warning.

CMAKE_PREFIX_PATH
Semicolon-separated list of directories specifying installation
prefixes to be searched by the find_package(), find_program(),
find_library(), find_file(), and find_path() commands.  Each command
will add appropriate subdirectories (like bin, lib, or include) as
specified in its own documentation.

By default this is empty.  It is intended to be set by the project.

CMAKE_LIBRARY_PATH, CMAKE_PROGRAM_PATH, and CMAKE_IGNORE_PATH.

CMAKE_PROGRAM_PATH
Semicolon-separated list of directories specifying a search path for
the find_program() command.  By default it is empty, it is intended to
be set by the project.  See also CMAKE_SYSTEM_PROGRAM_PATH and
CMAKE_PREFIX_PATH.

CMAKE_PROJECT_INCLUDE
New in version 3.15.

A CMake language file or module to be included as the last step of all
project() command calls.  This is intended for injecting custom code
into project builds without modifying their source.  See Code Injection
for a more detailed discussion of files potentially included during a
project() call.

CMAKE_PROJECT_<PROJECT-NAME>_INCLUDE_BEFORE,
CMAKE_PROJECT_INCLUDE_BEFORE, and CMAKE_PROJECT_TOP_LEVEL_INCLUDES
variables.

CMAKE_PROJECT_INCLUDE_BEFORE
New in version 3.15.

A CMake language file or module to be included as the first step of all
project() command calls.  This is intended for injecting custom code
into project builds without modifying their source.  See Code Injection
for a more detailed discussion of files potentially included during a
project() call.

CMAKE_PROJECT_<PROJECT-NAME>_INCLUDE_BEFORE, CMAKE_PROJECT_INCLUDE, and
CMAKE_PROJECT_TOP_LEVEL_INCLUDES variables.

CMAKE_PROJECT_<PROJECT-NAME>_INCLUDE
A CMake language file or module to be included as the last step of any
project() command calls that specify <PROJECT-NAME> as the project
name.  This is intended for injecting custom code into project builds
without modifying their source.  See Code Injection for a more detailed
discussion of files potentially included during a project() call.

CMAKE_PROJECT_INCLUDE, CMAKE_PROJECT_INCLUDE_BEFORE, and
CMAKE_PROJECT_TOP_LEVEL_INCLUDES variables.

CMAKE_PROJECT_<PROJECT-NAME>_INCLUDE_BEFORE
New in version 3.17.

A CMake language file or module to be included as the first step of any
project() command calls that specify <PROJECT-NAME> as the project
name.  This is intended for injecting custom code into project builds
without modifying their source.  See Code Injection for a more detailed
discussion of files potentially included during a project() call.

CMAKE_PROJECT_INCLUDE, CMAKE_PROJECT_INCLUDE_BEFORE, and
CMAKE_PROJECT_TOP_LEVEL_INCLUDES variables.

CMAKE_PROJECT_TOP_LEVEL_INCLUDES
New in version 3.24.

Semicolon-separated list of CMake language files to include as part of
the very first project() call.  The files will be included immediately
after the toolchain file has been read (if one is specified) and
platform variables have been set, but before any languages have been
enabled. Therefore, language-specific variables, including things like
CMAKE_<LANG>_COMPILER, might not be set.  See Code Injection for a more
detailed discussion of files potentially included during a project()
call.

This variable is intended for specifying files that perform one-time
setup for the build. It provides an injection point for things like
configuring package managers, adding logic the user shares between
projects (e.g. defining their own custom build types), and so on. It is
primarily for users to add things specific to their environment, but
not for specifying the toolchain details (use CMAKE_TOOLCHAIN_FILE for
that).

By default, this variable is empty.  It is intended to be set by the
user.

CMAKE_PROJECT_<PROJECT-NAME>_INCLUDE, and
CMAKE_PROJECT_<PROJECT-NAME>_INCLUDE_BEFORE variables.

CMAKE_REQUIRE_FIND_PACKAGE_<PackageName>
New in version 3.22.

Variable for making find_package() call REQUIRED.

Every non-REQUIRED find_package() call in a project can be turned into
REQUIRED by setting the variable
CMAKE_REQUIRE_FIND_PACKAGE_<PackageName> to TRUE.  This can be used to
assert assumptions about build environment and to ensure the build will
fail early if they do not hold.

CMAKE_SKIP_INSTALL_ALL_DEPENDENCY
Don't make the install target depend on the all target.

By default, the install target depends on the all target.  This has the
effect, that when make install is invoked or INSTALL is built, first
the all target is built, then the installation starts.  If
CMAKE_SKIP_INSTALL_ALL_DEPENDENCY is set to TRUE, this dependency is
not created, so the installation process will start immediately,
independent from whether the project has been completely built or not.

CMAKE_STAGING_PREFIX
This variable may be set to a path to install to when cross-compiling.
This can be useful if the path in CMAKE_SYSROOT is read-only, or
otherwise should remain pristine.

The CMAKE_STAGING_PREFIX location is also used as a search prefix by
the find_* commands. This can be controlled by setting the
CMAKE_FIND_NO_INSTALL_PREFIX variable.

If any RPATH/RUNPATH entries passed to the linker contain the
CMAKE_STAGING_PREFIX, the matching path fragments are replaced with the
CMAKE_INSTALL_PREFIX.

CMAKE_SUBLIME_TEXT_2_ENV_SETTINGS
New in version 3.8.

This variable contains a list of env vars as a list of tokens with the
syntax var=value.

Example:

set(CMAKE_SUBLIME_TEXT_2_ENV_SETTINGS
"FOO=FOO1\;FOO2\;FOON"
"BAR=BAR1\;BAR2\;BARN"
"BAZ=BAZ1\;BAZ2\;BAZN"
"FOOBAR=FOOBAR1\;FOOBAR2\;FOOBARN"
"VALID="
)

In case of malformed variables CMake will fail:

set(CMAKE_SUBLIME_TEXT_2_ENV_SETTINGS
"THIS_IS_NOT_VALID"
)

CMAKE_SUBLIME_TEXT_2_EXCLUDE_BUILD_TREE
New in version 3.8.

If this variable evaluates to ON at the end of the top-level
CMakeLists.txt file, the Sublime Text 2 extra generator excludes the
build tree from the .sublime-project if it is inside the source tree.

CMAKE_SUPPRESS_REGENERATION
New in version 3.12.

If CMAKE_SUPPRESS_REGENERATION is OFF, which is default, then CMake
adds a special target on which all other targets depend that checks the
build system and optionally re-runs CMake to regenerate the build
system when the target specification source changes.

If this variable evaluates to ON at the end of the top-level
CMakeLists.txt file, CMake will not add the regeneration target to the
build system or perform any build system checks.

CMAKE_SYSROOT
Path to pass to the compiler in the --sysroot flag.

The CMAKE_SYSROOT content is passed to the compiler in the --sysroot
flag, if supported.  The path is also stripped from the RPATH/RUNPATH
if necessary on installation.  The CMAKE_SYSROOT is also used to prefix
paths searched by the find_* commands.

This variable may only be set in a toolchain file specified by the
CMAKE_TOOLCHAIN_FILE variable.

CMAKE_SYSROOT_COMPILE
New in version 3.9.

Path to pass to the compiler in the --sysroot flag when compiling
source files.  This is the same as CMAKE_SYSROOT but is used only for
compiling sources and not linking.

This variable may only be set in a toolchain file specified by the
CMAKE_TOOLCHAIN_FILE variable.

New in version 3.9.

Path to pass to the compiler in the --sysroot flag when linking.  This
is the same as CMAKE_SYSROOT but is used only for linking and not
compiling sources.

This variable may only be set in a toolchain file specified by the
CMAKE_TOOLCHAIN_FILE variable.

CMAKE_SYSTEM_APPBUNDLE_PATH
New in version 3.4.

Search path for macOS application bundles used by the find_program(),
and find_package() commands.  By default it contains the standard
directories for the current system.  It is not intended to be modified
by the project, use CMAKE_APPBUNDLE_PATH for this.

CMAKE_SYSTEM_FRAMEWORK_PATH
New in version 3.4.

Search path for macOS frameworks used by the find_library(),
find_package(), find_path(), and find_file() commands.  By default it
contains the standard directories for the current system.  It is not
intended to be modified by the project, use CMAKE_FRAMEWORK_PATH for
this.

CMAKE_SYSTEM_IGNORE_PATH
Semicolon-separated list of directories to be ignored by the various
find...() commands.

For find_program(), find_library(), find_file(), and find_path(), any
file found in one of the listed directories will be ignored. The listed
directories do not apply recursively, so any subdirectories to be
ignored must also be explicitly listed.  CMAKE_SYSTEM_IGNORE_PATH does
not affect the search prefixes used by these four commands. To ignore
individual paths under a search prefix (e.g. bin, include, lib, etc.),
each path must be listed in CMAKE_SYSTEM_IGNORE_PATH as a full absolute
path. CMAKE_SYSTEM_IGNORE_PREFIX_PATH provides a more appropriate way
to ignore a whole search prefix.

find_package() is also affected by CMAKE_SYSTEM_IGNORE_PATH, but only
for Config mode searches. Any <Name>Config.cmake or <name>-config.cmake
file found in one of the specified directories will be ignored. In
addition, any search prefix found in CMAKE_SYSTEM_IGNORE_PATH will be
skipped for backward compatibility reasons, but new code should prefer
to use CMAKE_SYSTEM_IGNORE_PREFIX_PATH to ignore prefixes instead.

Ignoring search locations can be useful in cross-compiling environments
where some system directories contain incompatible but possibly
linkable libraries.  For example, on cross-compiled cluster
environments, this allows a user to ignore directories containing
libraries meant for the front-end machine.

CMAKE_SYSTEM_IGNORE_PATH is populated by CMake as part of its platform
and toolchain setup. Its purpose is to ignore locations containing
incompatible binaries meant for the host rather than the target
platform.  The project or end user should not modify this variable,
they should use CMAKE_IGNORE_PATH instead.

o CMAKE_SYSTEM_IGNORE_PREFIX_PATH

o CMAKE_SYSTEM_PREFIX_PATH

o CMAKE_SYSTEM_LIBRARY_PATH

o CMAKE_SYSTEM_INCLUDE_PATH

o CMAKE_SYSTEM_PROGRAM_PATH

CMAKE_SYSTEM_IGNORE_PREFIX_PATH
New in version 3.23.

Semicolon-separated list of search prefixes to be ignored by the
find_program(), find_library(), find_file(), and find_path() commands.
The prefixes are also ignored by the Config mode of the find_package()
command (Module mode is unaffected).  To ignore specific directories

Ignoring search locations can be useful in cross-compiling environments
where some system directories contain incompatible but possibly
linkable libraries.  For example, on cross-compiled cluster
environments, this allows a user to ignore directories containing
libraries meant for the front-end machine.

CMAKE_SYSTEM_IGNORE_PREFIX_PATH is populated by CMake as part of its
platform and toolchain setup. Its purpose is to ignore locations
containing incompatible binaries meant for the host rather than the
target platform.  The project or end user should not modify this
variable, they should use CMAKE_IGNORE_PREFIX_PATH instead.

o CMAKE_SYSTEM_IGNORE_PATH

o CMAKE_SYSTEM_PREFIX_PATH

o CMAKE_SYSTEM_LIBRARY_PATH

o CMAKE_SYSTEM_INCLUDE_PATH

o CMAKE_SYSTEM_PROGRAM_PATH

CMAKE_SYSTEM_INCLUDE_PATH
Semicolon-separated list of directories specifying a search path for
the find_file() and find_path() commands.  By default this contains the
standard directories for the current system.  It is not intended to be
modified by the project; use CMAKE_INCLUDE_PATH for this.  See also
CMAKE_SYSTEM_PREFIX_PATH.

CMAKE_SYSTEM_LIBRARY_PATH
Semicolon-separated list of directories specifying a search path for
the find_library() command.  By default this contains the standard
directories for the current system.  It is not intended to be modified
by the project; use CMAKE_LIBRARY_PATH for this.  See also
CMAKE_SYSTEM_PREFIX_PATH.

CMAKE_SYSTEM_PREFIX_PATH
Semicolon-separated list of directories specifying installation
prefixes to be searched by the find_package(), find_program(),
find_library(), find_file(), and find_path() commands.  Each command
will add appropriate subdirectories (like bin, lib, or include) as
specified in its own documentation.

By default this contains the system directories for the current system,
the CMAKE_INSTALL_PREFIX, and the CMAKE_STAGING_PREFIX.  The
installation and staging prefixes may be excluded by setting the
CMAKE_FIND_NO_INSTALL_PREFIX variable before the first project()
invocation.

The system directories that are contained in CMAKE_SYSTEM_PREFIX_PATH
are locations that typically include installed software. An example
being /usr/local for UNIX based platforms. In addition to standard
platform locations, CMake will also add values to
CMAKE_SYSTEM_PREFIX_PATH based on environment variables. The
environment variables and search locations that CMake uses may evolve
over time, as platforms and their conventions also evolve. The
following provides an indicative list of environment variables and
locations that CMake searches, but they are subject to change:

CrayLinuxEnvironment:

o ENV{SYSROOT_DIR}/

o ENV{SYSROOT_DIR}/usr

o ENV{SYSROOT_DIR}/usr/local

Darwin:

o ENV{SDKROOT}/usr When CMAKE_OSX_SYSROOT is not explicitly
specified.

OpenBSD:

o ENV{LOCALBASE}

Unix:

o ENV{CONDA_PREFIX} when using a conda compiler

Windows:

o ENV{ProgramW6432}

o ENV{ProgramFiles}

o ENV{ProgramFiles(x86)}

o ENV{SystemDrive}/Program Files

o ENV{SystemDrive}/Program Files (x86)

CMAKE_SYSTEM_PREFIX_PATH is not intended to be modified by the project;
use CMAKE_PREFIX_PATH for this.

CMAKE_SYSTEM_PROGRAM_PATH, and CMAKE_SYSTEM_IGNORE_PATH.

CMAKE_SYSTEM_PROGRAM_PATH
Semicolon-separated list of directories specifying a search path for
the find_program() command.  By default this contains the standard
directories for the current system.  It is not intended to be modified
by the project; use CMAKE_PROGRAM_PATH for this.  See also
CMAKE_SYSTEM_PREFIX_PATH.

CMAKE_TLS_CAINFO
commands' TLS_CAINFO options.  It is unset by default.

This variable is also used by the ExternalProject and FetchContent

CMAKE_TLS_VERIFY
commands' TLS_VERIFY options.  If not set, the default is off.

This variable is also used by the ExternalProject and FetchContent

TLS verification can help provide confidence that one is connecting to
the desired server.  When downloading known content, one should also
use file hashes to verify it.

set(CMAKE_TLS_VERIFY TRUE)

CMAKE_USER_MAKE_RULES_OVERRIDE
Specify a CMake file that overrides platform information.

CMake loads the specified file while enabling support for each language
from either the project() or enable_language() commands.  It is loaded
after CMake's builtin compiler and platform information modules have
been loaded but before the information is used.  The file may set
platform information variables to override CMake's defaults.  See
CMAKE_USER_MAKE_RULES_OVERRIDE_<LANG> for the language-specific version
of this variable.

This feature is intended for use only in overriding information
variables that must be set before CMake builds its first test project
to check that the compiler for a language works.  It should not be used
to load a file in cases that a normal include() will work.  Use it only
as a last resort for behavior that cannot be achieved any other way.
For example, one may set the CMAKE_C_FLAGS_INIT variable to change the
default value used to initialize the CMAKE_C_FLAGS variable before it
is cached.  The override file should NOT be used to set anything that
could be set after languages are enabled, such as variables like
CMAKE_RUNTIME_OUTPUT_DIRECTORY that affect the placement of binaries.
Information set in the file will be used for try_compile() and
try_run() builds too.

CMAKE_WARN_DEPRECATED
Whether to issue warnings for deprecated functionality.

If not FALSE, use of deprecated functionality will issue warnings.  If
this variable is not set, CMake behaves as if it were set to TRUE.

When running cmake(1), this option can be enabled with the -Wdeprecated
option, or disabled with the -Wno-deprecated option.

CMAKE_WARN_ON_ABSOLUTE_INSTALL_DESTINATION
Ask cmake_install.cmake script to warn each time a file with absolute
INSTALL DESTINATION is encountered.

This variable is used by CMake-generated cmake_install.cmake scripts.
If one sets this variable to ON while running the script, it may get
warning messages from the script.

CMAKE_XCODE_GENERATE_SCHEME
New in version 3.9.

If enabled, the Xcode generator will generate schema files.  These are
useful to invoke analyze, archive, build-for-testing and test actions
from the command line.

This variable initializes the XCODE_GENERATE_SCHEME target property on
all targets.

CMAKE_XCODE_GENERATE_TOP_LEVEL_PROJECT_ONLY
New in version 3.11.

If enabled, the Xcode generator will generate only a single Xcode
project file for the topmost project() command instead of generating
one for every project() command.

This could be useful to speed up the CMake generation step for large
projects and to work-around a bug in the ZERO_CHECK logic.

New in version 3.19.

This variable is used to initialize the XCODE_LINK_BUILD_PHASE_MODE
property on targets.  It affects the methods that the Xcode generator
uses to link different kinds of libraries.  Its default value is NONE.

New in version 3.13.

Whether to enable Address Sanitizer in the Diagnostics section of the
generated Xcode scheme.

This variable initializes the XCODE_SCHEME_ADDRESS_SANITIZER property
on all targets.

Please refer to the XCODE_GENERATE_SCHEME target property documentation
to see all Xcode schema related properties.

New in version 3.13.

Whether to enable Detect use of stack after return in the Diagnostics
section of the generated Xcode scheme.

This variable initializes the
XCODE_SCHEME_ADDRESS_SANITIZER_USE_AFTER_RETURN property on all
targets.

Please refer to the XCODE_GENERATE_SCHEME target property documentation
to see all Xcode schema related properties.

CMAKE_XCODE_SCHEME_DEBUG_DOCUMENT_VERSIONING
New in version 3.16.

Whether to enable Allow debugging when using document Versions Browser
in the Options section of the generated Xcode scheme.

This variable initializes the XCODE_SCHEME_DEBUG_DOCUMENT_VERSIONING
property on all targets.

Please refer to the XCODE_GENERATE_SCHEME target property documentation
to see all Xcode schema related properties.

CMAKE_XCODE_SCHEME_ENABLE_GPU_FRAME_CAPTURE_MODE
New in version 3.23.

Property value for GPU Frame Capture in the Options section of the
generated Xcode scheme. Example values are Metal and Disabled.

This variable initializes the
XCODE_SCHEME_ENABLE_GPU_FRAME_CAPTURE_MODE property on all targets.

Please refer to the XCODE_GENERATE_SCHEME target property documentation
to see all Xcode schema related properties.

New in version 3.13.

Whether to disable the Main Thread Checker in the Diagnostics section
of the generated Xcode scheme.

This variable initializes the XCODE_SCHEME_DISABLE_MAIN_THREAD_CHECKER
property on all targets.

Please refer to the XCODE_GENERATE_SCHEME target property documentation
to see all Xcode schema related properties.

New in version 3.13.

Whether to enable Dynamic Library Loads in the Diagnostics section of
the generated Xcode scheme.

This variable initializes the XCODE_SCHEME_DYNAMIC_LIBRARY_LOADS
property on all targets.

Please refer to the XCODE_GENERATE_SCHEME target property documentation
to see all Xcode schema related properties.

New in version 3.13.

Whether to enable Dynamic Linker API usage in the Diagnostics section
of the generated Xcode scheme.

This variable initializes the XCODE_SCHEME_DYNAMIC_LINKER_API_USAGE
property on all targets.

Please refer to the XCODE_GENERATE_SCHEME target property documentation
to see all Xcode schema related properties.

CMAKE_XCODE_SCHEME_ENVIRONMENT
New in version 3.17.

Specify environment variables that should be added to the Arguments
section of the generated Xcode scheme.

If set to a list of environment variables and values of the form
MYVAR=value those environment variables will be added to the scheme.

This variable initializes the XCODE_SCHEME_ENVIRONMENT property on all
targets.

Please refer to the XCODE_GENERATE_SCHEME target property documentation
to see all Xcode schema related properties.

CMAKE_XCODE_SCHEME_GUARD_MALLOC
New in version 3.13.

Whether to enable Guard Malloc in the Diagnostics section of the
generated Xcode scheme.

This variable initializes the XCODE_SCHEME_GUARD_MALLOC property on all
targets.

Please refer to the XCODE_GENERATE_SCHEME target property documentation
to see all Xcode schema related properties.

New in version 3.13.

Whether to enable the Main Thread Checker option Pause on issues in the
Diagnostics section of the generated Xcode scheme.

This variable initializes the XCODE_SCHEME_MAIN_THREAD_CHECKER_STOP
property on all targets.

Please refer to the XCODE_GENERATE_SCHEME target property documentation
to see all Xcode schema related properties.

CMAKE_XCODE_SCHEME_MALLOC_GUARD_EDGES
New in version 3.13.

Whether to enable Malloc Guard Edges in the Diagnostics section of the
generated Xcode scheme.

This variable initializes the XCODE_SCHEME_MALLOC_GUARD_EDGES property
on all targets.

Please refer to the XCODE_GENERATE_SCHEME target property documentation
to see all Xcode schema related properties.

CMAKE_XCODE_SCHEME_MALLOC_SCRIBBLE
New in version 3.13.

Whether to enable Malloc Scribble in the Diagnostics section of the
generated Xcode scheme.

This variable initializes the XCODE_SCHEME_MALLOC_SCRIBBLE property on
all targets.

Please refer to the XCODE_GENERATE_SCHEME target property documentation
to see all Xcode schema related properties.

CMAKE_XCODE_SCHEME_MALLOC_STACK
New in version 3.13.

Whether to enable Malloc Stack in the Diagnostics section of the
generated Xcode scheme.

This variable initializes the XCODE_SCHEME_MALLOC_STACK property on all
targets.

Please refer to the XCODE_GENERATE_SCHEME target property documentation
to see all Xcode schema related properties.

New in version 3.13.

Whether to enable Thread Sanitizer in the Diagnostics section of the
generated Xcode scheme.

This variable initializes the XCODE_SCHEME_THREAD_SANITIZER property on
all targets.

Please refer to the XCODE_GENERATE_SCHEME target property documentation
to see all Xcode schema related properties.

New in version 3.13.

Whether to enable Thread Sanitizer - Pause on issues in the Diagnostics
section of the generated Xcode scheme.

This variable initializes the XCODE_SCHEME_THREAD_SANITIZER_STOP
property on all targets.

Please refer to the XCODE_GENERATE_SCHEME target property documentation
to see all Xcode schema related properties.

CMAKE_XCODE_SCHEME_UNDEFINED_BEHAVIOUR_SANITIZER
New in version 3.13.

Whether to enable Undefined Behavior Sanitizer in the Diagnostics
section of the generated Xcode scheme.

This variable initializes the
XCODE_SCHEME_UNDEFINED_BEHAVIOUR_SANITIZER property on all targets.

Please refer to the XCODE_GENERATE_SCHEME target property documentation
to see all Xcode schema related properties.

CMAKE_XCODE_SCHEME_UNDEFINED_BEHAVIOUR_SANITIZER_STOP
New in version 3.13.

Whether to enable Undefined Behavior Sanitizer option Pause on issues
in the Diagnostics section of the generated Xcode scheme.

This variable initializes the
XCODE_SCHEME_UNDEFINED_BEHAVIOUR_SANITIZER_STOP property on all
targets.

Please refer to the XCODE_GENERATE_SCHEME target property documentation
to see all Xcode schema related properties.

CMAKE_XCODE_SCHEME_WORKING_DIRECTORY
New in version 3.17.

Specify the Working Directory of the Run and Profile actions in the
generated Xcode scheme.

This variable initializes the XCODE_SCHEME_WORKING_DIRECTORY property
on all targets.

Please refer to the XCODE_GENERATE_SCHEME target property documentation
to see all Xcode schema related properties.

CMAKE_XCODE_SCHEME_ZOMBIE_OBJECTS
New in version 3.13.

Whether to enable Zombie Objects in the Diagnostics section of the
generated Xcode scheme.

This variable initializes the XCODE_SCHEME_ZOMBIE_OBJECTS property on
all targets.

Please refer to the XCODE_GENERATE_SCHEME target property documentation
to see all Xcode schema related properties.

CMAKE_XCODE_XCCONFIG
New in version 3.24.

If set, the Xcode generator will register the specified file as a
global XCConfig file. For target-level XCConfig files see the
XCODE_XCCONFIG target property.

This feature is intended to ease migration from native Xcode projects
to CMake projects.

Contents of CMAKE_XCODE_XCCONFIG may use generator expressions.

<PackageName>_ROOT
New in version 3.12.

Calls to find_package(<PackageName>) will search in prefixes specified
by the <PackageName>_ROOT CMake variable, where <PackageName> is the
name given to the find_package() call and _ROOT is literal.  For
example, find_package(Foo) will search prefixes specified in the
Foo_ROOT CMake variable (if set).  See policy CMP0074.

This variable may hold a single prefix or a semicolon-separated list of
multiple prefixes.

VARIABLES THAT DESCRIBE THE SYSTEM
ANDROID
New in version 3.7.

Set to 1 when the target system (CMAKE_SYSTEM_NAME) is Android.

APPLE
Set to True when the target system is an Apple platform (macOS, iOS,
tvOS or watchOS).

BORLAND
True if the Borland compiler is being used.

This is set to true if the Borland compiler is being used.

CMAKE_ANDROID_NDK_VERSION
New in version 3.20.

When Cross Compiling for Android with the NDK and using an Android NDK
version 11 or higher, this variable is provided by CMake to report the
NDK version number.

CMAKE_CL_64
Discouraged.  Use CMAKE_SIZEOF_VOID_P instead.

Set to a true value when using a Microsoft Visual Studio cl compiler
that targets a 64-bit architecture.

CMAKE_COMPILER_2005
Using the Visual Studio 2005 compiler from Microsoft

Set to true when using the Visual Studio 2005 compiler from Microsoft.

CMAKE_HOST_APPLE
True for Apple macOS operating systems.

Set to true when the host system is Apple macOS.

CMAKE_HOST_SOLARIS
New in version 3.6.

True for Oracle Solaris operating systems.

Set to true when the host system is Oracle Solaris.

CMAKE_HOST_SYSTEM
Composite Name of OS CMake is being run on.

This variable is the composite of CMAKE_HOST_SYSTEM_NAME and
CMAKE_HOST_SYSTEM_VERSION, e.g.
${CMAKE_HOST_SYSTEM_NAME}-${CMAKE_HOST_SYSTEM_VERSION}.  If
CMAKE_HOST_SYSTEM_VERSION is not set, then this variable is the same as
CMAKE_HOST_SYSTEM_NAME.

CMAKE_HOST_SYSTEM_NAME
Name of the OS CMake is running on.

On systems that have the uname command, this variable is set to the
output of uname -s.  Linux, Windows, and Darwin for macOS are the
values found on the big three operating systems.

CMAKE_HOST_SYSTEM_PROCESSOR
The name of the CPU CMake is running on.

Windows Platforms
On Windows, this variable is set to the value of the environment
variable PROCESSOR_ARCHITECTURE.

Unix Platforms
On systems that support uname, this variable is set to the output of:

o uname -m on GNU, Linux, Cygwin, Android, or

o arch on OpenBSD, or

o on other systems,

o uname -p if its exit code is nonzero, or

o uname -m otherwise.

macOS Platforms
The value of uname -m is used by default.

On Apple Silicon hosts, the architecture printed by uname -m may vary
based on CMake's own architecture and that of the invoking process
tree.

New in version 3.19.2: On Apple Silicon hosts:

o The CMAKE_APPLE_SILICON_PROCESSOR variable or the
CMAKE_APPLE_SILICON_PROCESSOR environment variable may be set to
specify the host architecture explicitly.

o If CMAKE_OSX_ARCHITECTURES is not set, CMake adds explicit flags to
tell the compiler to build for the host architecture so the toolchain
does not have to guess based on the process tree's architecture.

CMAKE_HOST_SYSTEM_VERSION
The OS version CMake is running on.

A numeric version string for the system.  On systems that support
uname, this variable is set to the output of uname -r. On other systems
this is set to major-minor version numbers.

CMAKE_HOST_UNIX
True for UNIX and UNIX like operating systems.

Set to true when the host system is UNIX or UNIX like (i.e.  APPLE and
CYGWIN).

CMAKE_HOST_WIN32
True if the host system is running Windows, including Windows 64-bit
and MSYS.

Set to false on Cygwin.

CMAKE_LIBRARY_ARCHITECTURE
Target architecture library directory name, if detected.

This is the value of CMAKE_<LANG>_LIBRARY_ARCHITECTURE as detected for
one of the enabled languages.

CMAKE_LIBRARY_ARCHITECTURE_REGEX
Regex matching possible target architecture library directory names.

This is used to detect CMAKE_<LANG>_LIBRARY_ARCHITECTURE from the
implicit linker search path by matching the <arch> name.

CMAKE_OBJECT_PATH_MAX
Maximum object file full-path length allowed by native build tools.

CMake computes for every source file an object file name that is unique
to the source file and deterministic with respect to the full path to
the source file.  This allows multiple source files in a target to
share the same name if they lie in different directories without
rebuilding when one is added or removed.  However, it can produce long
full paths in a few cases, so CMake shortens the path using a hashing
scheme when the full path to an object file exceeds a limit.  CMake has
a built-in limit for each platform that is sufficient for common tools,
but some native tools may have a lower limit.  This variable may be set
to specify the limit explicitly.  The value must be an integer no less
than 128.

CMAKE_SYSTEM
Composite name of operating system CMake is compiling for.

This variable is the composite of CMAKE_SYSTEM_NAME and
CMAKE_SYSTEM_VERSION, e.g.
${CMAKE_SYSTEM_NAME}-${CMAKE_SYSTEM_VERSION}.  If CMAKE_SYSTEM_VERSION
is not set, then this variable is the same as CMAKE_SYSTEM_NAME.

CMAKE_SYSTEM_NAME
The name of the operating system for which CMake is to build.  See the
CMAKE_SYSTEM_VERSION variable for the OS version.

Note that CMAKE_SYSTEM_NAME is not set to anything by default when
running in script mode, since it's not building anything.

System Name for Host Builds
CMAKE_SYSTEM_NAME is by default set to the same value as the
CMAKE_HOST_SYSTEM_NAME variable so that the build targets the host
system.

System Name for Cross Compiling
CMAKE_SYSTEM_NAME may be set explicitly when first configuring a new
build tree in order to enable cross compiling.  In this case the
CMAKE_SYSTEM_VERSION variable must also be set explicitly.

CMAKE_SYSTEM_PROCESSOR
When not cross-compiling, this variable has the same value as the
CMAKE_HOST_SYSTEM_PROCESSOR variable.  In many cases, this will
correspond to the target architecture for the build, but this is not
guaranteed.  (E.g. on Windows, the host may be AMD64 even when using a
MSVC cl compiler with a 32-bit target.)

When cross-compiling, a CMAKE_TOOLCHAIN_FILE should set the
CMAKE_SYSTEM_PROCESSOR variable to match target architecture that it
specifies (via CMAKE_<LANG>_COMPILER and perhaps
CMAKE_<LANG>_COMPILER_TARGET).

CMAKE_SYSTEM_VERSION
The version of the operating system for which CMake is to build.  See
the CMAKE_SYSTEM_NAME variable for the OS name.

System Version for Host Builds
When the CMAKE_SYSTEM_NAME variable takes its default value then
CMAKE_SYSTEM_VERSION is by default set to the same value as the
CMAKE_HOST_SYSTEM_VERSION variable so that the build targets the host
system version.

In the case of a host build then CMAKE_SYSTEM_VERSION may be set
explicitly when first configuring a new build tree in order to enable
targeting the build for a different version of the host operating
system than is actually running on the host.  This is allowed and not
considered cross compiling so long as the binaries built for the
specified OS version can still run on the host.

System Version for Cross Compiling
When the CMAKE_SYSTEM_NAME variable is set explicitly to enable cross
compiling then the value of CMAKE_SYSTEM_VERSION must also be set
explicitly to specify the target system version.

CYGWIN
True for Cygwin.

Set to true when using Cygwin.

GHSMULTI
New in version 3.3.

1 when using Green Hills MULTI generator.

Also, Set to 1 when the target system is a Green Hills platform (i.e.
When CMAKE_SYSTEM_NAME is GHS-MULTI).

IOS
New in version 3.14.

Set to 1 when the target system (CMAKE_SYSTEM_NAME) is iOS.

MINGW
New in version 3.2.

True when using MinGW

Set to true when the compiler is some version of MinGW.

MSVC
Set to true when the compiler is some version of Microsoft Visual C++
or another compiler simulating the Visual C++ cl command-line syntax.

MSVC10
Discouraged.  Use the MSVC_VERSION variable instead.

True when using the Microsoft Visual Studio v100 toolset (cl version
16) or another compiler that simulates it.

MSVC11
Discouraged.  Use the MSVC_VERSION variable instead.

True when using the Microsoft Visual Studio v110 toolset (cl version
17) or another compiler that simulates it.

MSVC12
Discouraged.  Use the MSVC_VERSION variable instead.

True when using the Microsoft Visual Studio v120 toolset (cl version
18) or another compiler that simulates it.

MSVC14
New in version 3.1.

Discouraged.  Use the MSVC_VERSION variable instead.

True when using the Microsoft Visual Studio v140 or v141 toolset (cl
version 19) or another compiler that simulates it.

MSVC60
Discouraged.  Use the MSVC_VERSION variable instead.

True when using Microsoft Visual C++ 6.0.

Set to true when the compiler is version 6.0 of Microsoft Visual C++.

MSVC70
Discouraged.  Use the MSVC_VERSION variable instead.

True when using Microsoft Visual C++ 7.0.

Set to true when the compiler is version 7.0 of Microsoft Visual C++.

MSVC71
Discouraged.  Use the MSVC_VERSION variable instead.

True when using Microsoft Visual C++ 7.1.

Set to true when the compiler is version 7.1 of Microsoft Visual C++.

MSVC80
Discouraged.  Use the MSVC_VERSION variable instead.

True when using the Microsoft Visual Studio v80 toolset (cl version 14)
or another compiler that simulates it.

MSVC90
Discouraged.  Use the MSVC_VERSION variable instead.

True when using the Microsoft Visual Studio v90 toolset (cl version 15)
or another compiler that simulates it.

MSVC_IDE
True when using the Microsoft Visual C++ IDE.

Set to true when the target platform is the Microsoft Visual C++ IDE,
as opposed to the command line compiler.

NOTE:
This variable is only available after compiler detection has been
performed, so it is not available to toolchain files or before the
first project() or enable_language() call which uses an MSVC-like
compiler.

MSVC_TOOLSET_VERSION
New in version 3.12.

The toolset version of Microsoft Visual C/C++ being used if any.  If
MSVC-like is being used, this variable is set based on the version of
the compiler as given by the MSVC_VERSION variable.

Known toolset version numbers are:

80        = VS 2005 (8.0)
90        = VS 2008 (9.0)
100       = VS 2010 (10.0)
110       = VS 2012 (11.0)
120       = VS 2013 (12.0)
140       = VS 2015 (14.0)
141       = VS 2017 (15.0)
142       = VS 2019 (16.0)
143       = VS 2022 (17.0)

Compiler versions newer than those known to CMake will be reported as
the latest known toolset version.

MSVC_VERSION
The version of Microsoft Visual C/C++ being used if any.  If a compiler
simulating Visual C++ is being used, this variable is set to the
toolset version simulated as given by the _MSC_VER preprocessor
definition.

Known version numbers are:

1200      = VS  6.0
1300      = VS  7.0
1310      = VS  7.1
1400      = VS  8.0 (v80 toolset)
1500      = VS  9.0 (v90 toolset)
1600      = VS 10.0 (v100 toolset)
1700      = VS 11.0 (v110 toolset)
1800      = VS 12.0 (v120 toolset)
1900      = VS 14.0 (v140 toolset)
1910-1919 = VS 15.0 (v141 toolset)
1920-1929 = VS 16.0 (v142 toolset)
1930-1939 = VS 17.0 (v143 toolset)

variable.

MSYS
New in version 3.14.

True when using the MSYS Makefiles generator.

UNIX
Set to True when the target system is UNIX or UNIX-like (e.g. APPLE and
CYGWIN).  The CMAKE_SYSTEM_NAME variable should be queried if a more
specific understanding of the target system is required.

WIN32
Set to True when the target system is Windows, including Win64.

WINCE
New in version 3.1.

True when the CMAKE_SYSTEM_NAME variable is set to WindowsCE.

WINDOWS_PHONE
New in version 3.1.

True when the CMAKE_SYSTEM_NAME variable is set to WindowsPhone.

WINDOWS_STORE
New in version 3.1.

True when the CMAKE_SYSTEM_NAME variable is set to WindowsStore.

XCODE
New in version 3.7.

True when using Xcode generator.

XCODE_VERSION
Version of Xcode (Xcode generator only).

Under the Xcode generator, this is the version of Xcode as specified in
Xcode.app/Contents/version.plist (such as 3.1.2).

VARIABLES THAT CONTROL THE BUILD
New in version 3.24.

When Cross Compiling for ADSP SHARC/Blackfin, this variable holds the
absolute path to the latest CCES or VDSP++ install.  The directory is
expected to contain the cc21k.exe and ccblkfn.exe compilers.  This will
be set automatically if a default install of CCES or VDSP++ can be
found.

CMAKE_AIX_EXPORT_ALL_SYMBOLS
New in version 3.17.

Default value for AIX_EXPORT_ALL_SYMBOLS target property.  This
variable is used to initialize the property on each target as it is
created.

New in version 3.4.

Default value for the ANDROID_ANT_ADDITIONAL_OPTIONS target property.
See that target property for additional information.

CMAKE_ANDROID_API
New in version 3.1.

When Cross Compiling for Android with NVIDIA Nsight Tegra Visual Studio
Edition, this variable may be set to specify the default value for the
ANDROID_API target property.  See that target property for additional
information.

Otherwise, when Cross Compiling for Android, this variable provides the
Android API version number targeted.  This will be the same value as
the CMAKE_SYSTEM_VERSION variable for Android platforms.

CMAKE_ANDROID_API_MIN
New in version 3.2.

Default value for the ANDROID_API_MIN target property.  See that target
property for additional information.

CMAKE_ANDROID_ARCH
New in version 3.4.

When Cross Compiling for Android with NVIDIA Nsight Tegra Visual Studio
Edition, this variable may be set to specify the default value for the
ANDROID_ARCH target property.  See that target property for additional
information.

Otherwise, when Cross Compiling for Android, this variable provides the
name of the Android architecture corresponding to the value of the
CMAKE_ANDROID_ARCH_ABI variable.  The architecture name may be one of:

o arm

o arm64

o mips

o mips64

o x86

o x86_64

CMAKE_ANDROID_ARCH_ABI
New in version 3.7.

When Cross Compiling for Android, this variable specifies the target
architecture and ABI to be used.  Valid values are:

o arm64-v8a

o armeabi-v7a

o armeabi-v6

o armeabi

o mips

o mips64

o x86

o x86_64

variables.

CMAKE_ANDROID_ARM_MODE
New in version 3.7.

When Cross Compiling for Android and CMAKE_ANDROID_ARCH_ABI is set to
one of the armeabi architectures, set CMAKE_ANDROID_ARM_MODE to ON to
target 32-bit ARM processors (-marm).  Otherwise, the default is to
target the 16-bit Thumb processors (-mthumb).

CMAKE_ANDROID_ARM_NEON
New in version 3.7.

When Cross Compiling for Android and CMAKE_ANDROID_ARCH_ABI is set to
armeabi-v7a set CMAKE_ANDROID_ARM_NEON to ON to target ARM NEON
devices.

CMAKE_ANDROID_ASSETS_DIRECTORIES
New in version 3.4.

Default value for the ANDROID_ASSETS_DIRECTORIES target property.  See
that target property for additional information.

CMAKE_ANDROID_EXCEPTIONS
New in version 3.20.

When Cross Compiling for Android with the NDK, this variable may be set
to specify whether exceptions are enabled.

CMAKE_ANDROID_GUI
New in version 3.1.

Default value for the ANDROID_GUI target property of executables.  See
that target property for additional information.

CMAKE_ANDROID_JAR_DEPENDENCIES
New in version 3.4.

Default value for the ANDROID_JAR_DEPENDENCIES target property.  See
that target property for additional information.

CMAKE_ANDROID_JAR_DIRECTORIES
New in version 3.4.

Default value for the ANDROID_JAR_DIRECTORIES target property.  See
that target property for additional information.

CMAKE_ANDROID_JAVA_SOURCE_DIR
New in version 3.4.

Default value for the ANDROID_JAVA_SOURCE_DIR target property.  See
that target property for additional information.

CMAKE_ANDROID_NATIVE_LIB_DEPENDENCIES
New in version 3.4.

Default value for the ANDROID_NATIVE_LIB_DEPENDENCIES target property.
See that target property for additional information.

CMAKE_ANDROID_NATIVE_LIB_DIRECTORIES
New in version 3.4.

Default value for the ANDROID_NATIVE_LIB_DIRECTORIES target property.
See that target property for additional information.

CMAKE_ANDROID_NDK
New in version 3.7.

When Cross Compiling for Android with the NDK, this variable holds the
absolute path to the root directory of the NDK.  The directory must
contain a platforms subdirectory holding the android-<api> directories.

New in version 3.9.

When Cross Compiling for Android with the NDK, this variable may be set
to specify whether to use the deprecated per-api-level headers instead
of the unified headers.

If not specified, the default will be false if using a NDK version that
provides the unified headers and true otherwise.

CMAKE_ANDROID_NDK_TOOLCHAIN_HOST_TAG
New in version 3.7.1.

When Cross Compiling for Android with the NDK, this variable provides
the NDK's "host tag" used to construct the path to prebuilt toolchains
that run on the host.

CMAKE_ANDROID_NDK_TOOLCHAIN_VERSION
New in version 3.7.

When Cross Compiling for Android with the NDK, this variable may be set
to specify the version of the toolchain to be used as the compiler.

On NDK r19 or above, this variable must be unset or set to clang.

On NDK r18 or below, this variable must be set to one of these forms:

o <major>.<minor>: GCC of specified version

o clang<major>.<minor>: Clang of specified version

o clang: Clang of most recent available version

A toolchain of the requested version will be selected automatically to
match the ABI named in the CMAKE_ANDROID_ARCH_ABI variable.

If not specified, the default will be a value that selects the latest
available GCC toolchain.

CMAKE_ANDROID_PROCESS_MAX
New in version 3.4.

Default value for the ANDROID_PROCESS_MAX target property.  See that
target property for additional information.

CMAKE_ANDROID_PROGUARD
New in version 3.4.

Default value for the ANDROID_PROGUARD target property.  See that
target property for additional information.

CMAKE_ANDROID_PROGUARD_CONFIG_PATH
New in version 3.4.

Default value for the ANDROID_PROGUARD_CONFIG_PATH target property.
See that target property for additional information.

CMAKE_ANDROID_RTTI
New in version 3.20.

When Cross Compiling for Android with the NDK, this variable may be set
to specify whether RTTI is enabled.

CMAKE_ANDROID_SECURE_PROPS_PATH
New in version 3.4.

Default value for the ANDROID_SECURE_PROPS_PATH target property.  See
that target property for additional information.

CMAKE_ANDROID_SKIP_ANT_STEP
New in version 3.4.

Default value for the ANDROID_SKIP_ANT_STEP target property.  See that
target property for additional information.

CMAKE_ANDROID_STANDALONE_TOOLCHAIN
New in version 3.7.

When Cross Compiling for Android with a Standalone Toolchain, this
variable holds the absolute path to the root directory of the
toolchain.  The specified directory must contain a sysroot
subdirectory.

CMAKE_ANDROID_STL_TYPE
New in version 3.4.

When Cross Compiling for Android with NVIDIA Nsight Tegra Visual Studio
Edition, this variable may be set to specify the default value for the
ANDROID_STL_TYPE target property.  See that target property for

When Cross Compiling for Android with the NDK, this variable may be set
to specify the STL variant to be used.  The value may be one of:

none   No C++ Support

system Minimal C++ without STL

gabi++_static
GAbi++ Static

gabi++_shared
GAbi++ Shared

gnustl_static
GNU libstdc++ Static

gnustl_shared
GNU libstdc++ Shared

c++_static
LLVM libc++ Static

c++_shared
LLVM libc++ Shared

stlport_static
STLport Static

stlport_shared
STLport Shared

The default value is gnustl_static on NDK versions that provide it and
otherwise c++_static.  Note that this default differs from the native
NDK build system because CMake may be used to build projects for
Android that are not natively implemented for it and use the C++
standard library.

CMAKE_APPLE_SILICON_PROCESSOR
New in version 3.19.2.

On Apple Silicon hosts running macOS, set this variable to tell CMake
what architecture to use for CMAKE_HOST_SYSTEM_PROCESSOR.  The value
must be either arm64 or x86_64.

The value of this variable should never be modified by project code.
It is meant to be set as a cache entry provided by the user, e.g. via
-DCMAKE_APPLE_SILICON_PROCESSOR=....

CMAKE_ARCHIVE_OUTPUT_DIRECTORY
Where to put all the ARCHIVE target files when built.

This variable is used to initialize the ARCHIVE_OUTPUT_DIRECTORY
property on all the targets.  See that target property for additional
information.

CMAKE_ARCHIVE_OUTPUT_DIRECTORY_<CONFIG>
New in version 3.3.

Where to put all the ARCHIVE target files when built for a specific
configuration.

This variable is used to initialize the
ARCHIVE_OUTPUT_DIRECTORY_<CONFIG> property on all the targets.  See
that target property for additional information.

CMAKE_AUTOGEN_ORIGIN_DEPENDS
New in version 3.14.

Switch for forwarding origin target dependencies to the corresponding
_autogen targets.

This variable is used to initialize the AUTOGEN_ORIGIN_DEPENDS property
on all the targets.  See that target property for additional
information.

By default CMAKE_AUTOGEN_ORIGIN_DEPENDS is ON.

CMAKE_AUTOGEN_PARALLEL
New in version 3.11.

Number of parallel moc or uic processes to start when using AUTOMOC and
AUTOUIC.

This variable is used to initialize the AUTOGEN_PARALLEL property on
all the targets.  See that target property for additional information.

By default CMAKE_AUTOGEN_PARALLEL is unset.

CMAKE_AUTOGEN_VERBOSE
New in version 3.13.

Sets the verbosity of AUTOMOC, AUTOUIC and AUTORCC.  A positive integer
value or a true boolean value lets the AUTO* generators output

Setting CMAKE_AUTOGEN_VERBOSE has the same effect as setting the
VERBOSE environment variable during generation (e.g. by calling make
VERBOSE=1).  The extra verbosity is limited to the AUTO* generators
though.

By default CMAKE_AUTOGEN_VERBOSE is unset.

CMAKE_AUTOMOC
Whether to handle moc automatically for Qt targets.

This variable is used to initialize the AUTOMOC property on all the
targets.  See that target property for additional information.

CMAKE_AUTOMOC_COMPILER_PREDEFINES
New in version 3.10.

This variable is used to initialize the AUTOMOC_COMPILER_PREDEFINES
property on all the targets. See that target property for additional
information.

By default it is ON.

CMAKE_AUTOMOC_DEPEND_FILTERS
New in version 3.9.

Filter definitions used by CMAKE_AUTOMOC to extract file names from
source code as additional dependencies for the moc file.

This variable is used to initialize the AUTOMOC_DEPEND_FILTERS property
on all the targets. See that target property for additional
information.

By default it is empty.

CMAKE_AUTOMOC_MACRO_NAMES
New in version 3.10.

Semicolon-separated list list of macro names used by CMAKE_AUTOMOC to
determine if a C++ file needs to be processed by moc.

This variable is used to initialize the AUTOMOC_MACRO_NAMES property on
all the targets. See that target property for additional information.

The default value is Q_OBJECT;Q_GADGET;Q_NAMESPACE;Q_NAMESPACE_EXPORT.

Example
Let CMake know that source files that contain CUSTOM_MACRO must be moc
processed as well:

set(CMAKE_AUTOMOC ON)
list(APPEND CMAKE_AUTOMOC_MACRO_NAMES "CUSTOM_MACRO")

CMAKE_AUTOMOC_MOC_OPTIONS
Additional options for moc when using CMAKE_AUTOMOC.

This variable is used to initialize the AUTOMOC_MOC_OPTIONS property on
all the targets.  See that target property for additional information.

CMAKE_AUTOMOC_PATH_PREFIX
New in version 3.16.

Whether to generate the -p path prefix option for moc on AUTOMOC
enabled Qt targets.

This variable is used to initialize the AUTOMOC_PATH_PREFIX property on
all the targets.  See that target property for additional information.

The default value is OFF.

CMAKE_AUTORCC
Whether to handle rcc automatically for Qt targets.

This variable is used to initialize the AUTORCC property on all the
targets.  See that target property for additional information.

CMAKE_AUTORCC_OPTIONS
Additional options for rcc when using CMAKE_AUTORCC.

This variable is used to initialize the AUTORCC_OPTIONS property on all
the targets.  See that target property for additional information.

EXAMPLE

# ...
set(CMAKE_AUTORCC_OPTIONS "--compress;9")
# ...

CMAKE_AUTOUIC
Whether to handle uic automatically for Qt targets.

This variable is used to initialize the AUTOUIC property on all the
targets.  See that target property for additional information.

CMAKE_AUTOUIC_OPTIONS
Additional options for uic when using CMAKE_AUTOUIC.

This variable is used to initialize the AUTOUIC_OPTIONS property on all
the targets.  See that target property for additional information.

EXAMPLE

# ...
set_property(CMAKE_AUTOUIC_OPTIONS "--no-protection")
# ...

CMAKE_AUTOUIC_SEARCH_PATHS
New in version 3.9.

Search path list used by CMAKE_AUTOUIC to find included .ui files.

This variable is used to initialize the AUTOUIC_SEARCH_PATHS property
on all the targets. See that target property for additional
information.

By default it is empty.

CMAKE_BUILD_RPATH
New in version 3.8.

Semicolon-separated list specifying runtime path (RPATH) entries to add
to binaries linked in the build tree (for platforms that support it).
The entries will not be used for binaries in the install tree.  See
also the CMAKE_INSTALL_RPATH variable.

This is used to initialize the BUILD_RPATH target property for all
targets.

CMAKE_BUILD_RPATH_USE_ORIGIN
New in version 3.14.

Whether to use relative paths for the build RPATH.

This is used to initialize the BUILD_RPATH_USE_ORIGIN target property
for all targets, see that property for more details.

CMAKE_BUILD_WITH_INSTALL_NAME_DIR
New in version 3.9.

Whether to use INSTALL_NAME_DIR on targets in the build tree.

This variable is used to initialize the BUILD_WITH_INSTALL_NAME_DIR
property on all targets.

CMAKE_BUILD_WITH_INSTALL_RPATH
Use the install path for the RPATH.

Normally CMake uses the build tree for the RPATH when building
executables etc on systems that use RPATH.  When the software is
installed the executables etc are relinked by CMake to have the install
RPATH.  If this variable is set to true then the software is always
built with the install path for the RPATH and does not need to be

CMAKE_COMPILE_PDB_OUTPUT_DIRECTORY
New in version 3.1.

Output directory for MS debug symbol .pdb files generated by the
compiler while building source files.

This variable is used to initialize the COMPILE_PDB_OUTPUT_DIRECTORY
property on all the targets.

CMAKE_COMPILE_PDB_OUTPUT_DIRECTORY_<CONFIG>
New in version 3.1.

Per-configuration output directory for MS debug symbol .pdb files
generated by the compiler while building source files.

This is a per-configuration version of
CMAKE_COMPILE_PDB_OUTPUT_DIRECTORY.  This variable is used to
initialize the COMPILE_PDB_OUTPUT_DIRECTORY_<CONFIG> property on all
the targets.

CMAKE_COMPILE_WARNING_AS_ERROR
New in version 3.24.

Specify whether to treat warnings on compile as errors.

This variable is used to initialize the COMPILE_WARNING_AS_ERROR
property on all the targets.

CMAKE_<CONFIG>_POSTFIX
Default filename postfix for libraries under configuration <CONFIG>.

When a non-executable target is created its <CONFIG>_POSTFIX target
property is initialized with the value of this variable if it is set.

CMAKE_CROSS_CONFIGS
New in version 3.17.

Specifies a semicolon-separated list of configurations available from
all build-<Config>.ninja files in the Ninja Multi-Config generator.
This variable activates cross-config mode. Targets from each config
specified in this variable can be built from any build-<Config>.ninja
file. Custom commands will use the configuration native to
build-<Config>.ninja. If it is set to all, all configurations from
CMAKE_CONFIGURATION_TYPES are cross-configs. If it is not specified, or
empty, each build-<Config>.ninja file will only contain build rules for
its own configuration.

The value of this variable must be a subset of
CMAKE_CONFIGURATION_TYPES.

CMAKE_CTEST_ARGUMENTS
New in version 3.17.

Set this to a semicolon-separated list of command-line arguments to
pass to ctest(1) when running tests through the test (or RUN_TESTS)
target of the generated build system.

CMAKE_CUDA_RESOLVE_DEVICE_SYMBOLS
New in version 3.16.

Default value for CUDA_RESOLVE_DEVICE_SYMBOLS target property. This
variable is used to initialize the property on each target as it is
created.

CMAKE_CUDA_RUNTIME_LIBRARY
New in version 3.17.

Select the CUDA runtime library for use when compiling and linking
CUDA.  This variable is used to initialize the CUDA_RUNTIME_LIBRARY
property on all targets as they are created.

The allowed case insensitive values are:

None   Link with -cudart=none or equivalent flag(s) to use no CUDA
runtime library.

Shared Link with -cudart=shared or equivalent flag(s) to use a
dynamically-linked CUDA runtime library.

Static Link with -cudart=static or equivalent flag(s) to use a
statically-linked CUDA runtime library.

Contents of CMAKE_CUDA_RUNTIME_LIBRARY may use generator expressions.

If this variable is not set then the CUDA_RUNTIME_LIBRARY target
property will not be set automatically.  If that property is not set
then CMake uses an appropriate default value based on the compiler to
select the CUDA runtime library.

NOTE:
This property has effect only when the CUDA language is enabled. To
control the CUDA runtime linking when only using the CUDA SDK with
the C or C++ language we recommend using the FindCUDAToolkit module.

CMAKE_CUDA_SEPARABLE_COMPILATION
New in version 3.11.

Default value for CUDA_SEPARABLE_COMPILATION target property.  This
variable is used to initialize the property on each target as it is
created.

CMAKE_DEBUG_POSTFIX
See variable CMAKE_<CONFIG>_POSTFIX.

This variable is a special case of the more-general
CMAKE_<CONFIG>_POSTFIX variable for the DEBUG configuration.

CMAKE_DEFAULT_BUILD_TYPE
New in version 3.17.

Specifies the configuration to use by default in a build.ninja file in
the Ninja Multi-Config generator. If this variable is specified,
build.ninja uses build rules from build-<Config>.ninja by default. All
custom commands are executed with this configuration. If the variable
is not specified, the first item from CMAKE_CONFIGURATION_TYPES is used

The value of this variable must be one of the items from
CMAKE_CONFIGURATION_TYPES.

CMAKE_DEFAULT_CONFIGS
New in version 3.17.

Specifies a semicolon-separated list of configurations to build for a
target in build.ninja if no :<Config> suffix is specified in the Ninja
Multi-Config generator. If it is set to all, all configurations from
CMAKE_CROSS_CONFIGS are used. If it is not specified, it defaults to
CMAKE_DEFAULT_BUILD_TYPE.

For example, if you set CMAKE_DEFAULT_BUILD_TYPE to Release, but set
CMAKE_DEFAULT_CONFIGS to Debug or all, all <target> aliases in
build.ninja will resolve to <target>:Debug or <target>:all, but custom
commands will still use the Release configuration.

The value of this variable must be a subset of CMAKE_CROSS_CONFIGS or
be the same as CMAKE_DEFAULT_BUILD_TYPE. It must not be specified if
CMAKE_DEFAULT_BUILD_TYPE or CMAKE_CROSS_CONFIGS is not used.

New in version 3.16.

Default value for DISABLE_PRECOMPILE_HEADERS of targets.

By default CMAKE_DISABLE_PRECOMPILE_HEADERS is OFF.

CMAKE_DEPENDS_USE_COMPILER
New in version 3.20.

For the Makefile Generators, source dependencies are now, for a
selection of compilers, generated by the compiler itself. By defining
this variable with value FALSE, you can restore the legacy behavior
(i.e. using CMake for dependencies discovery).

CMAKE_ENABLE_EXPORTS
New in version 3.4.

Specify whether executables export symbols for loadable modules.

This variable is used to initialize the ENABLE_EXPORTS target property
for executable targets when they are created by calls to the
add_executable() command.  See the property documentation for details.

Linker flags to be used to create executables.

These flags will be used by the linker when creating an executable.

Flags to be used when linking an executable.

Same as CMAKE_C_FLAGS_* but used by the linker when creating
executables.

New in version 3.7.

Value used to initialize the CMAKE_EXE_LINKER_FLAGS_<CONFIG> cache
entry the first time a build tree is configured.  This variable is
meant to be set by a toolchain file.  CMake may prepend or append
content to the value based on the environment and target platform.

New in version 3.7.

Value used to initialize the CMAKE_EXE_LINKER_FLAGS cache entry the
first time a build tree is configured.  This variable is meant to be
set by a toolchain file.  CMake may prepend or append content to the
value based on the environment and target platform.

CMAKE_FOLDER
New in version 3.12.

Set the folder name. Use to organize targets in an IDE.

This variable is used to initialize the FOLDER property on all the
targets.  See that target property for additional information.

CMAKE_FRAMEWORK
New in version 3.15.

Default value for FRAMEWORK of targets.

This variable is used to initialize the FRAMEWORK property on all the
targets.  See that target property for additional information.

CMAKE_FRAMEWORK_MULTI_CONFIG_POSTFIX_<CONFIG>
New in version 3.18.

Default framework filename postfix under configuration <CONFIG> when
using a multi-config generator.

When a framework target is created its
FRAMEWORK_MULTI_CONFIG_POSTFIX_<CONFIG> target property is initialized
with the value of this variable if it is set.

CMAKE_Fortran_FORMAT
Set to FIXED or FREE to indicate the Fortran source layout.

This variable is used to initialize the Fortran_FORMAT property on all
the targets.  See that target property for additional information.

CMAKE_Fortran_MODULE_DIRECTORY
Fortran module output directory.

This variable is used to initialize the Fortran_MODULE_DIRECTORY
property on all the targets.  See that target property for additional
information.

CMAKE_Fortran_PREPROCESS
New in version 3.18.

Default value for Fortran_PREPROCESS of targets.

This variable is used to initialize the Fortran_PREPROCESS property on
all the targets.  See that target property for additional information.

CMAKE_GHS_NO_SOURCE_GROUP_FILE
New in version 3.14.

ON / OFF boolean to control if the project file for a target should be
one single file or multiple files.  Refer to GHS_NO_SOURCE_GROUP_FILE
for further details.

CMAKE_GLOBAL_AUTOGEN_TARGET
New in version 3.14.

Switch to enable generation of a global autogen target.

When CMAKE_GLOBAL_AUTOGEN_TARGET is enabled, a custom target autogen is
generated.  This target depends on all AUTOMOC and AUTOUIC generated
<ORIGIN>_autogen targets in the project.  By building the global
autogen target, all AUTOMOC and AUTOUIC files in the project will be
generated.

The name of the global autogen target can be changed by setting
CMAKE_GLOBAL_AUTOGEN_TARGET_NAME.

By default CMAKE_GLOBAL_AUTOGEN_TARGET is unset.

See the cmake-qt(7) manual for more information on using CMake with Qt.

Note
<ORIGIN>_autogen targets by default inherit their origin target's
dependencies.  This might result in unintended dependency target builds
when only <ORIGIN>_autogen targets are built.  A solution is to disable
AUTOGEN_ORIGIN_DEPENDS on the respective origin targets.

CMAKE_GLOBAL_AUTOGEN_TARGET_NAME
New in version 3.14.

Change the name of the global autogen target.

When CMAKE_GLOBAL_AUTOGEN_TARGET is enabled, a global custom target
named autogen is created.  CMAKE_GLOBAL_AUTOGEN_TARGET_NAME allows to
set a different name for that target.

By default CMAKE_GLOBAL_AUTOGEN_TARGET_NAME is unset.

See the cmake-qt(7) manual for more information on using CMake with Qt.

CMAKE_GLOBAL_AUTORCC_TARGET
New in version 3.14.

Switch to enable generation of a global autorcc target.

When CMAKE_GLOBAL_AUTORCC_TARGET is enabled, a custom target autorcc is
generated. This target depends on all AUTORCC generated
<ORIGIN>_arcc_<QRC> targets in the project.  By building the global
autorcc target, all AUTORCC files in the project will be generated.

The name of the global autorcc target can be changed by setting
CMAKE_GLOBAL_AUTORCC_TARGET_NAME.

By default CMAKE_GLOBAL_AUTORCC_TARGET is unset.

See the cmake-qt(7) manual for more information on using CMake with Qt.

CMAKE_GLOBAL_AUTORCC_TARGET_NAME
New in version 3.14.

Change the name of the global autorcc target.

When CMAKE_GLOBAL_AUTORCC_TARGET is enabled, a global custom target
named autorcc is created.  CMAKE_GLOBAL_AUTORCC_TARGET_NAME allows to
set a different name for that target.

By default CMAKE_GLOBAL_AUTOGEN_TARGET_NAME is unset.

See the cmake-qt(7) manual for more information on using CMake with Qt.

CMAKE_GNUtoMS
Convert GNU import libraries (.dll.a) to MS format (.lib).

This variable is used to initialize the GNUtoMS property on targets
when they are created.  See that target property for additional
information.

CMAKE_INCLUDE_CURRENT_DIR
Automatically add the current source and build directories to the
include path.

If this variable is enabled, CMake automatically adds
CMAKE_CURRENT_SOURCE_DIR and CMAKE_CURRENT_BINARY_DIR to the include
path for each directory.  These additional include directories do not
propagate down to subdirectories.  This is useful mainly for
out-of-source builds, where files generated into the build tree are
included by files located in the source tree.

By default CMAKE_INCLUDE_CURRENT_DIR is OFF.

CMAKE_INCLUDE_CURRENT_DIR_IN_INTERFACE
Automatically add the current source and build directories to the
INTERFACE_INCLUDE_DIRECTORIES target property.

If this variable is enabled, CMake automatically adds for each shared
library target, static library target, module target and executable
target, CMAKE_CURRENT_SOURCE_DIR and CMAKE_CURRENT_BINARY_DIR to the
INTERFACE_INCLUDE_DIRECTORIES target property.  By default
CMAKE_INCLUDE_CURRENT_DIR_IN_INTERFACE is OFF.

CMAKE_INSTALL_NAME_DIR
Directory name for installed targets on Apple platforms.

CMAKE_INSTALL_NAME_DIR is used to initialize the INSTALL_NAME_DIR
property on all targets.  See that target property for more
information.

CMAKE_INSTALL_REMOVE_ENVIRONMENT_RPATH
New in version 3.16.

Sets the default for whether toolchain-defined rpaths should be removed
during installation.

CMAKE_INSTALL_REMOVE_ENVIRONMENT_RPATH is a boolean that provides the
default value for the INSTALL_REMOVE_ENVIRONMENT_RPATH property of all
subsequently created targets.

CMAKE_INSTALL_RPATH
The rpath to use for installed targets.

A semicolon-separated list specifying the rpath to use in installed
targets (for platforms that support it).  This is used to initialize
the target property INSTALL_RPATH for all targets.

Add paths to linker search and installed rpath.

CMAKE_INSTALL_RPATH_USE_LINK_PATH is a boolean that if set to True will
append to the runtime search path (rpath) of installed binaries any
directories outside the project that are in the linker search path or
contain linked library files.  The directories are appended after the
value of the INSTALL_RPATH target property.

This variable is used to initialize the target property
INSTALL_RPATH_USE_LINK_PATH for all targets.

CMAKE_INTERPROCEDURAL_OPTIMIZATION
New in version 3.9.

Default value for INTERPROCEDURAL_OPTIMIZATION of targets.

This variable is used to initialize the INTERPROCEDURAL_OPTIMIZATION
property on all the targets.  See that target property for additional
information.

CMAKE_INTERPROCEDURAL_OPTIMIZATION_<CONFIG>
New in version 3.9.

Default value for INTERPROCEDURAL_OPTIMIZATION_<CONFIG> of targets.

This variable is used to initialize the
INTERPROCEDURAL_OPTIMIZATION_<CONFIG> property on all the targets.  See
that target property for additional information.

CMAKE_IOS_INSTALL_COMBINED
New in version 3.5.

Default value for IOS_INSTALL_COMBINED of targets.

This variable is used to initialize the IOS_INSTALL_COMBINED property
on all the targets.  See that target property for additional
information.

CMAKE_<LANG>_CLANG_TIDY
New in version 3.6.

Default value for <LANG>_CLANG_TIDY target property when <LANG> is C,
CXX, OBJC or OBJCXX.

This variable is used to initialize the property on each target as it
is created.  For example:

CMAKE_<LANG>_COMPILER_LAUNCHER
New in version 3.4.

Default value for <LANG>_COMPILER_LAUNCHER target property.  This
variable is used to initialize the property on each target as it is
created.  This is done only when <LANG> is C, CXX, Fortran, HIP, ISPC,
OBJC, OBJCXX, or CUDA.

This variable is initialized to the CMAKE_<LANG>_COMPILER_LAUNCHER
environment variable if it is set.

CMAKE_<LANG>_CPPCHECK
New in version 3.10.

Default value for <LANG>_CPPCHECK target property. This variable is
used to initialize the property on each target as it is created.  This
is done only when <LANG> is C or CXX.

CMAKE_<LANG>_CPPLINT
New in version 3.8.

Default value for <LANG>_CPPLINT target property. This variable is used
to initialize the property on each target as it is created.  This is
done only when <LANG> is C or CXX.

CMAKE_<LANG>_INCLUDE_WHAT_YOU_USE
New in version 3.3.

Default value for <LANG>_INCLUDE_WHAT_YOU_USE target property.  This
variable is used to initialize the property on each target as it is
created.  This is done only when <LANG> is C or CXX.

New in version 3.24.

This variable defines how to link a library or framework for the
specified <FEATURE> when a LINK_LIBRARY generator expression is used
and the link language for the target is <LANG>.  For this variable to
have any effect, the associated
CMAKE_<LANG>_LINK_LIBRARY_USING_<FEATURE>_SUPPORTED variable must be
set to true.

The CMAKE_LINK_LIBRARY_USING_<FEATURE> variable should be defined
instead for features that are independent of the link language.

Feature names are case-sensitive and may only contain letters, numbers
and underscores.  Feature names defined in all uppercase are reserved
for CMake's own built-in features (see Predefined Features further
below).

Feature Definitions
A library feature definition is a list that contains one or three
elements:

[<PREFIX>] <LIBRARY_EXPRESSION> [<SUFFIX>]

When <PREFIX> and <SUFFIX> are specified, they precede and follow
respectively the whole list of libraries specified in the LINK_LIBRARY
expression, not each library item individually.  There is no guarantee
that the list of specified libraries will be kept grouped together
though, so the <PREFIX> and <SUFFIX> may appear more than once if the
library list is reorganized by CMake to satisfy other constraints.
This means constructs like --start-group and --end-group, as supported
by the GNU ld linker, cannot be used in this way.  The LINK_GROUP
generator expression should be used instead for such constructs.

<LIBRARY_EXPRESSION> is used to specify the pattern for constructing
the corresponding fragment on the linker command line for each library.
The following placeholders can be used in the expression:

o <LIBRARY> is expanded to the full path to the library for CMake
targets, or to a platform-specific value based on the item otherwise
(the same as <LINK_ITEM> on Windows, or the library base name for
other platforms).

o <LINK_ITEM> is expanded to how the library would normally be linked
on the linker command line.

o <LIB_ITEM> is expanded to the full path to the library for CMake
targets, or the item itself exactly as specified in the
<LIBRARY_EXPRESSION> otherwise.

In addition to the above, it is possible to have one pattern for paths
(CMake targets and external libraries specified with file paths) and
another for other items specified by name only.  The PATH{} and NAME{}
wrappers can be used to provide the expansion for those two cases,
respectively.  When wrappers are used, both must be present.  For
example:

)

For all three elements of this variable (<PREFIX>,
<LIBRARY_EXPRESSION>, and <SUFFIX>), the LINKER: prefix can be used.

To pass options to the linker tool, each compiler driver has its own
syntax.  The LINKER: prefix and , separator can be used to specify, in
a portable way, options to pass to the linker tool. LINKER: is replaced
by the appropriate driver option and , by the appropriate driver
separator.  The driver prefix and driver separator are given by the
values of the CMAKE_<LANG>_LINKER_WRAPPER_FLAG and

Clang and -Wl,-z,defs for GNU GCC.

The LINKER: prefix can be specified as part of a SHELL: prefix
expression.

The LINKER: prefix supports, as an alternative syntax, specification of
arguments using the SHELL: prefix and space as separator. The previous
example then becomes "LINKER:SHELL:-z defs".

NOTE:
Specifying the SHELL: prefix anywhere other than at the beginning of
the LINKER: prefix is not supported.

Examples
A common need is to prevent the linker from discarding any symbols from
a static library.  Different linkers use different syntax for achieving
this.  The following example shows how this may be implemented for some
linkers.  Note that this is for illustration purposes only.  Projects
should use the built-in WHOLE_ARCHIVE feature instead (see Predefined
Features), which provides a more complete and more robust
implementation of this functionality.

if(CMAKE_C_COMPILER_ID STREQUAL "AppleClang")
elseif(CMAKE_C_COMPILER_ID STREQUAL "GNU" AND CMAKE_SYSTEM_NAME STREQUAL "Linux")
)
elseif(CMAKE_C_COMPILER_ID STREQUAL "MSVC")
else()
# feature not yet supported for the other environments
endif()

# The -force_load Apple linker option requires a file name
set(external_lib
"$<IF:$<LINK_LANG_AND_ID:C,AppleClang>,libexternal.a,external>"
)
"$<LINK_LIBRARY:load_archive,lib1,${external_lib}>"
)
else()
target_link_libraries(lib2 PRIVATE lib1 external)
endif()

CMake will generate the following link expressions:

o GNU: -Wl,--push-state,--whole-archive /path/to/lib1.a -lexternal
-Wl,--pop-state

o MSVC: /WHOLEARCHIVE:/path/to/lib1.lib /WHOLEARCHIVE:external.lib

Linking a library as weak
On macOS, it is possible to link a library in weak mode (the library
and all references are marked as weak imports).  Different flags must
be used for a library specified by file path compared to one specified
by name.  This constraint can be solved using PATH{} and NAME{}
wrappers.  Again, the following example shows how this may be
implemented for some linkers, but it is for illustration purposes only.
Projects should use the built-in WEAK_FRAMEWORK or WEAK_LIBRARY
features instead (see Predefined Features), which provide more complete
and more robust implementations of this functionality.

if (CMAKE_C_COMPILER_ID STREQUAL "AppleClang")
)
endif()

target_link_libraries(main PRIVATE "$<LINK_LIBRARY:weak_library,lib,external>") else() target_link_libraries(main PRIVATE lib external) endif() CMake will generate the following linker command line fragment when linking main using the AppleClang toolchain: -weak_library /path/to/lib -Xlinker -weak-lexternal. Predefined Features The following built-in library features are pre-defined by CMake: DEFAULT This feature corresponds to standard linking, essentially equivalent to using no feature at all. It is typically only used with the LINK_LIBRARY_OVERRIDE and LINK_LIBRARY_OVERRIDE_<LIBRARY> target properties. WHOLE_ARCHIVE Force inclusion of all members of a static library. This feature is only supported for the following platforms, with limitations as noted: o Linux. o All BSD variants. o SunOS. o All Apple variants. The library must be specified as a CMake target name, a library file name (such as libfoo.a), or a library file path (such as /path/to/libfoo.a). Due to a limitation of the Apple linker, it cannot be specified as a plain library name like foo, where foo is not a CMake target. o Windows. When using a MSVC or MSVC-like toolchain, the MSVC version must be greater than 1900. o Cygwin. o MSYS. FRAMEWORK This option tells the linker to search for the specified framework using the -framework linker option. It can only be used on Apple platforms, and only with a linker that understands the option used (i.e. the linker provided with Xcode, or one compatible with it). The framework can be specified as a CMake framework target, a bare framework name, or a file path. If a target is given, that target must have the FRAMEWORK target property set to true. For a file path, if it contains a directory part, that directory will be added as a framework search path. add_library(lib SHARED ...) target_link_libraries(lib PRIVATE "$<LINK_LIBRARY:FRAMEWORK,/path/to/my_framework>")

# The constructed linker command line will contain:
#   -F/path/to -framework my_framework

File paths must conform to one of the following patterns (* is a
wildcard, and optional parts are shown as [...]):

o [/path/to/]FwName[.framework]

o [/path/to/]FwName.framework/FwName

o [/path/to/]FwName.framework/Versions/*/FwName

Note that CMake recognizes and automatically handles framework
targets, even without using the $<LINK_LIBRARY:FRAMEWORK,...> expression. The generator expression can still be used with a CMake target if the project wants to be explicit about it, but it is not required to do so. The linker command line may have some differences between using the generator expression or not, but the final result should be the same. On the other hand, if a file path is given, CMake will recognize some paths automatically, but not all cases. The project may want to use$<LINK_LIBRARY:FRAMEWORK,...> for file paths so that the
expected behavior is clear.

NEEDED_FRAMEWORK
This is similar to the FRAMEWORK feature, except it forces the
linker to link with the framework even if no symbols are used
from it.  It uses the -needed_framework option and has the same
linker constraints as FRAMEWORK.

REEXPORT_FRAMEWORK
This is similar to the FRAMEWORK feature, except it tells the
linker that the framework should be available to clients linking
to the library being created.  It uses the -reexport_framework
option and has the same linker constraints as FRAMEWORK.

WEAK_FRAMEWORK
This is similar to the FRAMEWORK feature, except it forces the
linker to mark the framework and all references to it as weak
imports.  It uses the -weak_framework option and has the same
linker constraints as FRAMEWORK.

NEEDED_LIBRARY
This is similar to the NEEDED_FRAMEWORK feature, except it is
for use with non-framework targets or libraries (Apple platforms
only).  It uses the -needed_library or -needed-l option as
appropriate, and has the same linker constraints as
NEEDED_FRAMEWORK.

REEXPORT_LIBRARY
This is similar to the REEXPORT_FRAMEWORK feature,  except it is
for use with non-framework targets or libraries (Apple platforms
only).  It uses the -reexport_library or -reexport-l option as
appropriate, and has the same linker constraints as
REEXPORT_FRAMEWORK.

WEAK_LIBRARY
This is similar to the WEAK_FRAMEWORK feature, except it is for
use with non-framework targets or libraries (Apple platforms
only).  It uses the -weak_library or -weak-l option as
appropriate, and has the same linker constraints as
WEAK_FRAMEWORK.

New in version 3.24.

Set to TRUE if the <FEATURE>, as defined by variable
language <LANG>.

NOTE:
This variable is evaluated before the more generic variable

New in version 3.21.

Default value for <LANG>_LINKER_LAUNCHER target property. This variable
is used to initialize the property on each target as it is created.
This is done only when <LANG> is C, CXX, OBJC, or OBJCXX.

This variable is initialized to the CMAKE_<LANG>_LINKER_LAUNCHER
environment variable if it is set.

New in version 3.24.

This variable defines how to link a group of libraries for the
specified <FEATURE> when a LINK_GROUP generator expression is used and
the link language for the target is <LANG>.  For this variable to have
any effect, the associated
CMAKE_<LANG>_LINK_GROUP_USING_<FEATURE>_SUPPORTED variable must be set
to true.

The CMAKE_LINK_GROUP_USING_<FEATURE> variable should be defined instead
for features that are independent of the link language.

Feature names are case-sensitive and may only contain letters, numbers
and underscores.  Feature names defined in all uppercase are reserved
for CMake's own built-in features (see Predefined Features further
below).

Feature Definitions
A group feature definition is a list that contains exactly two
elements:

<PREFIX> <SUFFIX>

On the linker command line, <PREFIX> will precede the list of libraries
in the group and <SUFFIX> will follow after.

For the elements of this variable, the LINKER: prefix can be used.

To pass options to the linker tool, each compiler driver has its own
syntax.  The LINKER: prefix and , separator can be used to specify, in
a portable way, options to pass to the linker tool. LINKER: is replaced
by the appropriate driver option and , by the appropriate driver
separator.  The driver prefix and driver separator are given by the
values of the CMAKE_<LANG>_LINKER_WRAPPER_FLAG and

Clang and -Wl,-z,defs for GNU GCC.

The LINKER: prefix can be specified as part of a SHELL: prefix
expression.

The LINKER: prefix supports, as an alternative syntax, specification of
arguments using the SHELL: prefix and space as separator. The previous
example then becomes "LINKER:SHELL:-z defs".

NOTE:
Specifying the SHELL: prefix anywhere other than at the beginning of
the LINKER: prefix is not supported.

Examples
Solving cross-references between two static libraries
A project may define two or more static libraries which have circular
dependencies between them.  In order for the linker to resolve all
symbols at link time, it may need to search repeatedly among the
libraries until no new undefined references are created.  Different
linkers use different syntax for achieving this.  The following example
shows how this may be implemented for some linkers.  Note that this is
for illustration purposes only.  Projects should use the built-in
RESCAN group feature instead (see Predefined Features), which provides
a more complete and more robust implementation of this functionality.

if(CMAKE_C_COMPILER_ID STREQUAL "GNU" AND CMAKE_SYSTEM_NAME STREQUAL "Linux")
)
elseif(CMAKE_C_COMPILER_ID STREQUAL "SunPro" AND CMAKE_SYSTEM_NAME STREQUAL "SunOS")
)
else()
# feature not yet supported for the other environments
endif()

target_link_libraries(lib2 PRIVATE "$<LINK_GROUP:cross_refs,lib1,external>") else() target_link_libraries(lib2 PRIVATE lib1 external) endif() CMake will generate the following linker command line fragments when linking lib2: o GNU: -Wl,--start-group /path/to/lib1.a -lexternal -Wl,--end-group o SunPro: -Wl,-z,rescan-start /path/to/lib1.a -lexternal -Wl,-z,rescan-end Predefined Features The following built-in group features are pre-defined by CMake: RESCAN Some linkers are single-pass only. For such linkers, circular references between libraries typically result in unresolved symbols. This feature instructs the linker to search the specified static libraries repeatedly until no new undefined references are created. Normally, a static library is searched only once in the order that it is specified on the command line. If a symbol in that library is needed to resolve an undefined symbol referred to by an object in a library that appears later on the command line, the linker would not be able to resolve that reference. By grouping the static libraries with the RESCAN feature, they will all be searched repeatedly until all possible references are resolved. This will use linker options like --start-group and --end-group, or on SunOS, -z rescan-start and -z rescan-end. Using this feature has a significant performance cost. It is best to use it only when there are unavoidable circular references between two or more static libraries. This feature is available when using toolchains that target Linux, BSD, and SunOS. It can also be used when targeting Windows platforms if the GNU toolchain is used. CMAKE_<LANG>_LINK_GROUP_USING_<FEATURE>_SUPPORTED New in version 3.24. This variable specifies whether the <FEATURE> is supported for the link language <LANG>. If this variable is true, then the <FEATURE> must be defined by CMAKE_<LANG>_LINK_GROUP_USING_<FEATURE>, and the more generic CMAKE_LINK_GROUP_USING_<FEATURE>_SUPPORTED and CMAKE_LINK_GROUP_USING_<FEATURE> variables are not used. If CMAKE_<LANG>_LINK_GROUP_USING_<FEATURE>_SUPPORTED is false or is not set, then the CMAKE_LINK_GROUP_USING_<FEATURE>_SUPPORTED variable will determine whether <FEATURE> is deemed to be supported. CMAKE_<LANG>_LINK_LIBRARY_FILE_FLAG New in version 3.16. Language-specific flag to be used to link a library specified by a path to its file. The flag will be used before a library file path is given to the linker. This is needed only on very few platforms. CMAKE_<LANG>_LINK_LIBRARY_FLAG New in version 3.16. Flag to be used to link a library into a shared library or executable. This flag will be used to specify a library to link to a shared library or an executable for the specific language. On most compilers this is -l. CMAKE_<LANG>_LINK_WHAT_YOU_USE_FLAG New in version 3.22. Linker flag to be used to configure linker so that all specified libraries on the command line will be linked into the target. See also variable CMAKE_LINK_WHAT_YOU_USE_CHECK. CMAKE_<LANG>_VISIBILITY_PRESET Default value for the <LANG>_VISIBILITY_PRESET target property when a target is created. CMAKE_LIBRARY_OUTPUT_DIRECTORY Where to put all the LIBRARY target files when built. This variable is used to initialize the LIBRARY_OUTPUT_DIRECTORY property on all the targets. See that target property for additional information. CMAKE_LIBRARY_OUTPUT_DIRECTORY_<CONFIG> New in version 3.3. Where to put all the LIBRARY target files when built for a specific configuration. This variable is used to initialize the LIBRARY_OUTPUT_DIRECTORY_<CONFIG> property on all the targets. See that target property for additional information. CMAKE_LIBRARY_PATH_FLAG The flag to be used to add a library search path to a compiler. The flag will be used to specify a library directory to the compiler. On most compilers this is -L. CMAKE_LINK_DEF_FILE_FLAG Linker flag to be used to specify a .def file for dll creation. The flag will be used to add a .def file when creating a dll on Windows; this is only defined on Windows. CMAKE_LINK_DEPENDS_NO_SHARED Whether to skip link dependencies on shared library files. This variable initializes the LINK_DEPENDS_NO_SHARED property on targets when they are created. See that target property for additional information. CMAKE_LINK_GROUP_USING_<FEATURE> New in version 3.24. This variable defines how to link a group of libraries for the specified <FEATURE> when a LINK_GROUP generator expression is used. Both of the following conditions must be met for this variable to have any effect: o The associated CMAKE_LINK_GROUP_USING_<FEATURE>_SUPPORTED variable must be set to true. o There is no language-specific definition for the same <FEATURE>. This means CMAKE_<LANG>_LINK_GROUP_USING_<FEATURE>_SUPPORTED cannot be true for the link language used by the target for which the LINK_GROUP generator expression is evaluated. The CMAKE_<LANG>_LINK_GROUP_USING_<FEATURE> variable should be defined instead for features that are dependent on the link language. Feature names are case-sensitive and may only contain letters, numbers and underscores. Feature names defined in all uppercase are reserved for CMake's own built-in features (see Predefined Features further below). Feature Definitions A group feature definition is a list that contains exactly two elements: <PREFIX> <SUFFIX> On the linker command line, <PREFIX> will precede the list of libraries in the group and <SUFFIX> will follow after. For the elements of this variable, the LINKER: prefix can be used. To pass options to the linker tool, each compiler driver has its own syntax. The LINKER: prefix and , separator can be used to specify, in a portable way, options to pass to the linker tool. LINKER: is replaced by the appropriate driver option and , by the appropriate driver separator. The driver prefix and driver separator are given by the values of the CMAKE_<LANG>_LINKER_WRAPPER_FLAG and CMAKE_<LANG>_LINKER_WRAPPER_FLAG_SEP variables. For example, "LINKER:-z,defs" becomes -Xlinker -z -Xlinker defs for Clang and -Wl,-z,defs for GNU GCC. The LINKER: prefix can be specified as part of a SHELL: prefix expression. The LINKER: prefix supports, as an alternative syntax, specification of arguments using the SHELL: prefix and space as separator. The previous example then becomes "LINKER:SHELL:-z defs". NOTE: Specifying the SHELL: prefix anywhere other than at the beginning of the LINKER: prefix is not supported. Examples Solving cross-references between two static libraries A project may define two or more static libraries which have circular dependencies between them. In order for the linker to resolve all symbols at link time, it may need to search repeatedly among the libraries until no new undefined references are created. Different linkers use different syntax for achieving this. The following example shows how this may be implemented for some linkers. Note that this is for illustration purposes only. Projects should use the built-in RESCAN group feature instead (see Predefined Features), which provides a more complete and more robust implementation of this functionality. set(CMAKE_C_LINK_GROUP_USING_cross_refs_SUPPORTED TRUE) if(CMAKE_C_COMPILER_ID STREQUAL "GNU" AND CMAKE_SYSTEM_NAME STREQUAL "Linux") set(CMAKE_C_LINK_GROUP_USING_cross_refs "LINKER:--start-group" "LINKER:--end-group" ) elseif(CMAKE_C_COMPILER_ID STREQUAL "SunPro" AND CMAKE_SYSTEM_NAME STREQUAL "SunOS") set(CMAKE_C_LINK_GROUP_USING_cross_refs "LINKER:-z,rescan-start" "LINKER:-z,rescan-end" ) else() # feature not yet supported for the other environments set(CMAKE_C_LINK_GROUP_USING_cross_refs_SUPPORTED FALSE) endif() add_library(lib1 STATIC ...) add_library(lib2 SHARED ...) if(CMAKE_C_LINK_GROUP_USING_cross_refs_SUPPORTED) target_link_libraries(lib2 PRIVATE "$<LINK_GROUP:cross_refs,lib1,external>")
else()
target_link_libraries(lib2 PRIVATE lib1 external)
endif()

CMake will generate the following linker command line fragments when

o GNU: -Wl,--start-group /path/to/lib1.a -lexternal -Wl,--end-group

o SunPro: -Wl,-z,rescan-start /path/to/lib1.a -lexternal
-Wl,-z,rescan-end

Predefined Features
The following built-in group features are pre-defined by CMake:

RESCAN Some linkers are single-pass only.  For such linkers, circular
references between libraries typically result in unresolved
symbols.  This feature instructs the linker to search the
specified static libraries repeatedly until no new undefined
references are created.

Normally, a static library is searched only once in the order
that it is specified on the command line.  If a symbol in that
library is needed to resolve an undefined symbol referred to by
an object in a library that appears later on the command line,
the linker would not be able to resolve that reference.  By
grouping the static libraries with the RESCAN feature, they will
all be searched repeatedly until all possible references are
resolved.  This will use linker options like --start-group and
--end-group, or on SunOS, -z rescan-start and -z rescan-end.

Using this feature has a significant performance cost. It is
best to use it only when there are unavoidable circular
references between two or more static libraries.

This feature is available when using toolchains that target
Linux, BSD, and SunOS.  It can also be used when targeting
Windows platforms if the GNU toolchain is used.

New in version 3.24.

This variable specifies whether the <FEATURE> is supported regardless
of the link language.  If this variable is true, then the <FEATURE>
must be defined by CMAKE_LINK_GROUP_USING_<FEATURE>.

Note that this variable has no effect if
language of the target.

Default value for LINK_INTERFACE_LIBRARIES of targets.

This variable is used to initialize the LINK_INTERFACE_LIBRARIES
property on all the targets.  See that target property for additional
information.

Flag to be used to link a library specified by a path to its file.

The flag will be used before a library file path is given to the
linker.  This is needed only on very few platforms.

Flag to be used to link a library into an executable.

The flag will be used to specify a library to link to an executable.
On most compilers this is -l.

New in version 3.24.

This variable defines how to link a library or framework for the
specified <FEATURE> when a LINK_LIBRARY generator expression is used.
Both of the following conditions must be met for this variable to have
any effect:

o The associated CMAKE_LINK_LIBRARY_USING_<FEATURE>_SUPPORTED variable
must be set to true.

o There is no language-specific definition for the same <FEATURE>.
This means CMAKE_<LANG>_LINK_LIBRARY_USING_<FEATURE>_SUPPORTED cannot
be true for the link language used by the target for which the
LINK_LIBRARY generator expression is evaluated.

Feature names are case-sensitive and may only contain letters, numbers
and underscores.  Feature names defined in all uppercase are reserved
for CMake's own built-in features (see Predefined Features further
below).

Feature Definitions
A library feature definition is a list that contains one or three
elements:

[<PREFIX>] <LIBRARY_EXPRESSION> [<SUFFIX>]

When <PREFIX> and <SUFFIX> are specified, they precede and follow
respectively the whole list of libraries specified in the LINK_LIBRARY
expression, not each library item individually.  There is no guarantee
that the list of specified libraries will be kept grouped together
though, so the <PREFIX> and <SUFFIX> may appear more than once if the
library list is reorganized by CMake to satisfy other constraints.
This means constructs like --start-group and --end-group, as supported
by the GNU ld linker, cannot be used in this way.  The LINK_GROUP
generator expression should be used instead for such constructs.

<LIBRARY_EXPRESSION> is used to specify the pattern for constructing
the corresponding fragment on the linker command line for each library.
The following placeholders can be used in the expression:

o <LIBRARY> is expanded to the full path to the library for CMake
targets, or to a platform-specific value based on the item otherwise
(the same as <LINK_ITEM> on Windows, or the library base name for
other platforms).

o <LINK_ITEM> is expanded to how the library would normally be linked
on the linker command line.

o <LIB_ITEM> is expanded to the full path to the library for CMake
targets, or the item itself exactly as specified in the
<LIBRARY_EXPRESSION> otherwise.

In addition to the above, it is possible to have one pattern for paths
(CMake targets and external libraries specified with file paths) and
another for other items specified by name only.  The PATH{} and NAME{}
wrappers can be used to provide the expansion for those two cases,
respectively.  When wrappers are used, both must be present.  For
example:

)

For all three elements of this variable (<PREFIX>,
<LIBRARY_EXPRESSION>, and <SUFFIX>), the LINKER: prefix can be used.

To pass options to the linker tool, each compiler driver has its own
syntax.  The LINKER: prefix and , separator can be used to specify, in
a portable way, options to pass to the linker tool. LINKER: is replaced
by the appropriate driver option and , by the appropriate driver
separator.  The driver prefix and driver separator are given by the
values of the CMAKE_<LANG>_LINKER_WRAPPER_FLAG and

Clang and -Wl,-z,defs for GNU GCC.

The LINKER: prefix can be specified as part of a SHELL: prefix
expression.

The LINKER: prefix supports, as an alternative syntax, specification of
arguments using the SHELL: prefix and space as separator. The previous
example then becomes "LINKER:SHELL:-z defs".

NOTE:
Specifying the SHELL: prefix anywhere other than at the beginning of
the LINKER: prefix is not supported.

Examples
A common need is to prevent the linker from discarding any symbols from
a static library.  Different linkers use different syntax for achieving
this.  The following example shows how this may be implemented for some
linkers.  Note that this is for illustration purposes only.  Projects
should use the built-in WHOLE_ARCHIVE feature instead (see Predefined
Features), which provides a more complete and more robust
implementation of this functionality.

if(CMAKE_C_COMPILER_ID STREQUAL "AppleClang")
elseif(CMAKE_C_COMPILER_ID STREQUAL "GNU" AND CMAKE_SYSTEM_NAME STREQUAL "Linux")
)
elseif(CMAKE_C_COMPILER_ID STREQUAL "MSVC")
else()
# feature not yet supported for the other environments
endif()

# The -force_load Apple linker option requires a file name
set(external_lib
"$<IF:$<LINK_LANG_AND_ID:C,AppleClang>,libexternal.a,external>"
)
"$<LINK_LIBRARY:load_archive,lib1,${external_lib}>"
)
else()
target_link_libraries(lib2 PRIVATE lib1 external)
endif()

CMake will generate the following link expressions:

o GNU: -Wl,--push-state,--whole-archive /path/to/lib1.a -lexternal
-Wl,--pop-state

o MSVC: /WHOLEARCHIVE:/path/to/lib1.lib /WHOLEARCHIVE:external.lib

Linking a library as weak
On macOS, it is possible to link a library in weak mode (the library
and all references are marked as weak imports).  Different flags must
be used for a library specified by file path compared to one specified
by name.  This constraint can be solved using PATH{} and NAME{}
wrappers.  Again, the following example shows how this may be
implemented for some linkers, but it is for illustration purposes only.
Projects should use the built-in WEAK_FRAMEWORK or WEAK_LIBRARY
features instead (see Predefined Features), which provide more complete
and more robust implementations of this functionality.

if (CMAKE_C_COMPILER_ID STREQUAL "AppleClang")
)
endif()

target_link_libraries(main PRIVATE "$<LINK_LIBRARY:weak_library,lib,external>") else() target_link_libraries(main PRIVATE lib external) endif() CMake will generate the following linker command line fragment when linking main using the AppleClang toolchain: -weak_library /path/to/lib -Xlinker -weak-lexternal. Predefined Features The following built-in library features are pre-defined by CMake: DEFAULT This feature corresponds to standard linking, essentially equivalent to using no feature at all. It is typically only used with the LINK_LIBRARY_OVERRIDE and LINK_LIBRARY_OVERRIDE_<LIBRARY> target properties. WHOLE_ARCHIVE Force inclusion of all members of a static library. This feature is only supported for the following platforms, with limitations as noted: o Linux. o All BSD variants. o SunOS. o All Apple variants. The library must be specified as a CMake target name, a library file name (such as libfoo.a), or a library file path (such as /path/to/libfoo.a). Due to a limitation of the Apple linker, it cannot be specified as a plain library name like foo, where foo is not a CMake target. o Windows. When using a MSVC or MSVC-like toolchain, the MSVC version must be greater than 1900. o Cygwin. o MSYS. FRAMEWORK This option tells the linker to search for the specified framework using the -framework linker option. It can only be used on Apple platforms, and only with a linker that understands the option used (i.e. the linker provided with Xcode, or one compatible with it). The framework can be specified as a CMake framework target, a bare framework name, or a file path. If a target is given, that target must have the FRAMEWORK target property set to true. For a file path, if it contains a directory part, that directory will be added as a framework search path. add_library(lib SHARED ...) target_link_libraries(lib PRIVATE "$<LINK_LIBRARY:FRAMEWORK,/path/to/my_framework>")

# The constructed linker command line will contain:
#   -F/path/to -framework my_framework

File paths must conform to one of the following patterns (* is a
wildcard, and optional parts are shown as [...]):

o [/path/to/]FwName[.framework]

o [/path/to/]FwName.framework/FwName

o [/path/to/]FwName.framework/Versions/*/FwName

Note that CMake recognizes and automatically handles framework
targets, even without using the $<LINK_LIBRARY:FRAMEWORK,...> expression. The generator expression can still be used with a CMake target if the project wants to be explicit about it, but it is not required to do so. The linker command line may have some differences between using the generator expression or not, but the final result should be the same. On the other hand, if a file path is given, CMake will recognize some paths automatically, but not all cases. The project may want to use$<LINK_LIBRARY:FRAMEWORK,...> for file paths so that the
expected behavior is clear.

NEEDED_FRAMEWORK
This is similar to the FRAMEWORK feature, except it forces the
linker to link with the framework even if no symbols are used
from it.  It uses the -needed_framework option and has the same
linker constraints as FRAMEWORK.

REEXPORT_FRAMEWORK
This is similar to the FRAMEWORK feature, except it tells the
linker that the framework should be available to clients linking
to the library being created.  It uses the -reexport_framework
option and has the same linker constraints as FRAMEWORK.

WEAK_FRAMEWORK
This is similar to the FRAMEWORK feature, except it forces the
linker to mark the framework and all references to it as weak
imports.  It uses the -weak_framework option and has the same
linker constraints as FRAMEWORK.

NEEDED_LIBRARY
This is similar to the NEEDED_FRAMEWORK feature, except it is
for use with non-framework targets or libraries (Apple platforms
only).  It uses the -needed_library or -needed-l option as
appropriate, and has the same linker constraints as
NEEDED_FRAMEWORK.

REEXPORT_LIBRARY
This is similar to the REEXPORT_FRAMEWORK feature,  except it is
for use with non-framework targets or libraries (Apple platforms
only).  It uses the -reexport_library or -reexport-l option as
appropriate, and has the same linker constraints as
REEXPORT_FRAMEWORK.

WEAK_LIBRARY
This is similar to the WEAK_FRAMEWORK feature, except it is for
use with non-framework targets or libraries (Apple platforms
only).  It uses the -weak_library or -weak-l option as
appropriate, and has the same linker constraints as
WEAK_FRAMEWORK.

New in version 3.24.

Set to TRUE if the <FEATURE>, as defined by variable
language.

NOTE:
This variable is evaluated if, and only if, the variable
CMAKE_<LANG>_LINK_LIBRARY_USING_<FEATURE>_SUPPORTED is not defined.

New in version 3.7.

Default value for LINK_WHAT_YOU_USE target property.  This variable is
used to initialize the property on each target as it is created.

New in version 3.22.

Defines the command executed after the link step to check libraries
usage.  This check is currently only defined on ELF platforms with
value ldd -u -r.

CMAKE_MACOSX_BUNDLE
Default value for MACOSX_BUNDLE of targets.

This variable is used to initialize the MACOSX_BUNDLE property on all
the targets.  See that target property for additional information.

This variable is set to ON by default if CMAKE_SYSTEM_NAME equals to
iOS, tvOS or watchOS.

CMAKE_MACOSX_RPATH
Whether to use rpaths on macOS and iOS.

This variable is used to initialize the MACOSX_RPATH property on all
targets.

CMAKE_MAP_IMPORTED_CONFIG_<CONFIG>
Default value for MAP_IMPORTED_CONFIG_<CONFIG> of targets.

This variable is used to initialize the MAP_IMPORTED_CONFIG_<CONFIG>
property on all the targets.  See that target property for additional
information.

Linker flags to be used to create modules.

These flags will be used by the linker when creating a module.

Flags to be used when linking a module.

Same as CMAKE_C_FLAGS_* but used by the linker when creating modules.

New in version 3.7.

Value used to initialize the CMAKE_MODULE_LINKER_FLAGS_<CONFIG> cache
entry the first time a build tree is configured.  This variable is
meant to be set by a toolchain file.  CMake may prepend or append
content to the value based on the environment and target platform.

New in version 3.7.

Value used to initialize the CMAKE_MODULE_LINKER_FLAGS cache entry the
first time a build tree is configured.  This variable is meant to be
set by a toolchain file.  CMake may prepend or append content to the
value based on the environment and target platform.

CMAKE_MSVCIDE_RUN_PATH
New in version 3.10.

Extra PATH locations that should be used when executing
add_custom_command() or add_custom_target() when using the Visual
Studio 9 2008 (or above) generator. This allows for running commands
and using dll's that the IDE environment is not aware of.

If not set explicitly the value is initialized by the
CMAKE_MSVCIDE_RUN_PATH environment variable, if set, and otherwise left
empty.

CMAKE_MSVC_RUNTIME_LIBRARY
New in version 3.15.

Select the MSVC runtime library for use by compilers targeting the MSVC
ABI.  This variable is used to initialize the MSVC_RUNTIME_LIBRARY
property on all targets as they are created.  It is also propagated by
calls to the try_compile() command into the test project.

The allowed values are:

Compile with -MT or equivalent flag(s) to use a multi-threaded

Compile with -MD or equivalent flag(s) to use a multi-threaded

Compile with -MTd or equivalent flag(s) to use a multi-threaded

Compile with -MDd or equivalent flag(s) to use a multi-threaded

The value is ignored on non-MSVC compilers but an unsupported value
will be rejected as an error when using a compiler targeting the MSVC
ABI.

The value may also be the empty string ("") in which case no runtime
library selection flag will be added explicitly by CMake.  Note that
with Visual Studio Generators the native build system may choose to add
its own default runtime library selection flag.

Use generator expressions to support per-configuration specification.
For example, the code:

set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")

selects for all following targets a multi-threaded statically-linked
runtime library with or without debug information depending on the
configuration.

If this variable is not set then the MSVC_RUNTIME_LIBRARY target
property will not be set automatically.  If that property is not set
then CMake uses the default value
MultiThreaded$<$<CONFIG:Debug>:Debug>DLL to select a MSVC runtime
library.

NOTE:
This variable has effect only when policy CMP0091 is set to NEW
prior to the first project() or enable_language() command that
enables a language using a compiler targeting the MSVC ABI.

CMAKE_NINJA_OUTPUT_PATH_PREFIX
New in version 3.6.

Set output files path prefix for the Ninja generator.

Every output files listed in the generated build.ninja will be prefixed
by the contents of this variable (a trailing slash is appended if
missing).  This is useful when the generated ninja file is meant to be
embedded as a subninja file into a super ninja project.  For example, a
ninja build file generated with a command like:

cd top-build-dir/sub &&
cmake -G Ninja -DCMAKE_NINJA_OUTPUT_PATH_PREFIX=sub/ path/to/source

can be embedded in top-build-dir/build.ninja with a directive like
this:

subninja sub/build.ninja

The auto-regeneration rule in top-build-dir/build.ninja must have an
order-only dependency on sub/build.ninja.

NOTE:
When CMAKE_NINJA_OUTPUT_PATH_PREFIX is set, the project generated by
CMake cannot be used as a standalone project.  No default targets
are specified.

CMAKE_NO_BUILTIN_CHRPATH
Do not use the builtin binary editor to fix runtime library search
paths on installation.

When an ELF or XCOFF binary needs to have a different runtime library
search path after installation than it does in the build tree, CMake
uses a builtin editor to change the runtime search path in the
installed copy.  If this variable is set to true then CMake will relink
the binary before installation instead of using its builtin editor.

New in version 3.20: This variable also applies to XCOFF binaries'
LIBPATH.  Prior to the addition of the XCOFF editor in CMake 3.20, this
variable applied only to ELF binaries' RPATH/RUNPATH.

CMAKE_NO_SYSTEM_FROM_IMPORTED
Default value for NO_SYSTEM_FROM_IMPORTED of targets.

This variable is used to initialize the NO_SYSTEM_FROM_IMPORTED
property on all the targets.  See that target property for additional
information.

CMAKE_OPTIMIZE_DEPENDENCIES
New in version 3.19.

Initializes the OPTIMIZE_DEPENDENCIES target property.

CMAKE_OSX_ARCHITECTURES
Target specific architectures for macOS and iOS.

This variable is used to initialize the OSX_ARCHITECTURES property on
each target as it is created.  See that target property for additional
information.

The value of this variable should be set prior to the first project()
or enable_language() command invocation because it may influence
configuration of the toolchain and flags.  It is intended to be set
locally by the user creating a build tree.  This variable should be set
as a CACHE entry (or else CMake may remove it while initializing a
cache entry of the same name) unless policy CMP0126 is set to NEW.

Despite the OSX part in the variable name(s) they apply also to other
SDKs than macOS like iOS, tvOS, or watchOS.

This variable is ignored on platforms other than Apple.

CMAKE_OSX_DEPLOYMENT_TARGET
Specify the minimum version of the target platform (e.g. macOS or iOS)
on which the target binaries are to be deployed.  CMake uses this
variable value for the -mmacosx-version-min flag or their respective
target platform equivalents.  For older Xcode versions that shipped
multiple macOS SDKs this variable also helps to choose the SDK in case
CMAKE_OSX_SYSROOT is unset.

If not set explicitly the value is initialized by the
MACOSX_DEPLOYMENT_TARGET environment variable, if set, and otherwise
computed based on the host platform.

The value of this variable should be set prior to the first project()
or enable_language() command invocation because it may influence
configuration of the toolchain and flags.  It is intended to be set
locally by the user creating a build tree.  This variable should be set
as a CACHE entry (or else CMake may remove it while initializing a
cache entry of the same name) unless policy CMP0126 is set to NEW.

Despite the OSX part in the variable name(s) they apply also to other
SDKs than macOS like iOS, tvOS, or watchOS.

This variable is ignored on platforms other than Apple.

CMAKE_OSX_SYSROOT
Specify the location or name of the macOS platform SDK to be used.
CMake uses this value to compute the value of the -isysroot flag or
equivalent and to help the find_* commands locate files in the SDK.

If not set explicitly the value is initialized by the SDKROOT
environment variable, if set, and otherwise computed based on the
CMAKE_OSX_DEPLOYMENT_TARGET or the host platform.

The value of this variable should be set prior to the first project()
or enable_language() command invocation because it may influence
configuration of the toolchain and flags.  It is intended to be set
locally by the user creating a build tree.  This variable should be set
as a CACHE entry (or else CMake may remove it while initializing a
cache entry of the same name) unless policy CMP0126 is set to NEW.

Despite the OSX part in the variable name(s) they apply also to other
SDKs than macOS like iOS, tvOS, or watchOS.

This variable is ignored on platforms other than Apple.

CMAKE_PCH_WARN_INVALID
New in version 3.18.

This variable is used to initialize the PCH_WARN_INVALID property of
targets when they are created.

CMAKE_PCH_INSTANTIATE_TEMPLATES
New in version 3.19.

This variable is used to initialize the PCH_INSTANTIATE_TEMPLATES
property of targets when they are created.

CMAKE_PDB_OUTPUT_DIRECTORY
Output directory for MS debug symbol .pdb files generated by the linker
for executable and shared library targets.

This variable is used to initialize the PDB_OUTPUT_DIRECTORY property
on all the targets.  See that target property for additional
information.

CMAKE_PDB_OUTPUT_DIRECTORY_<CONFIG>
Per-configuration output directory for MS debug symbol .pdb files
generated by the linker for executable and shared library targets.

This is a per-configuration version of CMAKE_PDB_OUTPUT_DIRECTORY.
This variable is used to initialize the PDB_OUTPUT_DIRECTORY_<CONFIG>
property on all the targets.  See that target property for additional
information.

CMAKE_PLATFORM_NO_VERSIONED_SONAME
New in version 3.1.

This variable is used to globally control whether the VERSION and
SOVERSION target properties should be used for shared libraries.  When
set to true, adding version information to each shared library target
is disabled.

By default this variable is set only on platforms where CMake knows it
is needed.   On other platforms, the specified properties will be used
for shared libraries.

CMAKE_POSITION_INDEPENDENT_CODE
Default value for POSITION_INDEPENDENT_CODE of targets.

This variable is used to initialize the POSITION_INDEPENDENT_CODE
property on all the targets.  See that target property for additional
information.  If set, its value is also used by the try_compile()
command.

CMAKE_RUNTIME_OUTPUT_DIRECTORY
Where to put all the RUNTIME target files when built.

This variable is used to initialize the RUNTIME_OUTPUT_DIRECTORY
property on all the targets.  See that target property for additional
information.

CMAKE_RUNTIME_OUTPUT_DIRECTORY_<CONFIG>
New in version 3.3.

Where to put all the RUNTIME target files when built for a specific
configuration.

This variable is used to initialize the
RUNTIME_OUTPUT_DIRECTORY_<CONFIG> property on all the targets.  See
that target property for additional information.

Linker flags to be used to create shared libraries.

These flags will be used by the linker when creating a shared library.

Flags to be used when linking a shared library.

Same as CMAKE_C_FLAGS_* but used by the linker when creating shared
libraries.

New in version 3.7.

Value used to initialize the CMAKE_SHARED_LINKER_FLAGS_<CONFIG> cache
entry the first time a build tree is configured.  This variable is
meant to be set by a toolchain file.  CMake may prepend or append
content to the value based on the environment and target platform.

New in version 3.7.

Value used to initialize the CMAKE_SHARED_LINKER_FLAGS cache entry the
first time a build tree is configured.  This variable is meant to be
set by a toolchain file.  CMake may prepend or append content to the
value based on the environment and target platform.

CMAKE_SKIP_BUILD_RPATH
Do not include RPATHs in the build tree.

Normally CMake uses the build tree for the RPATH when building
executables etc on systems that use RPATH.  When the software is
installed the executables etc are relinked by CMake to have the install
RPATH.  If this variable is set to true then the software is always
built with no RPATH.

CMAKE_SKIP_INSTALL_RPATH
Do not include RPATHs in the install tree.

Normally CMake uses the build tree for the RPATH when building
executables etc on systems that use RPATH.  When the software is
installed the executables etc are relinked by CMake to have the install
RPATH.  If this variable is set to true then the software is always
installed without RPATH, even if RPATH is enabled when building.  This
can be useful for example to allow running tests from the build
directory with RPATH enabled before the installation step.  To omit
RPATH in both the build and install steps, use CMAKE_SKIP_RPATH

Flags to be used to create static libraries.  These flags will be
passed to the archiver when creating a static library.

NOTE:
Static libraries do not actually link.  They are essentially
archives of object files.  The use of the name "linker" in the name
of this variable is kept for compatibility.

Flags to be used to create static libraries.  These flags will be
passed to the archiver when creating a static library in the <CONFIG>
configuration.

NOTE:
Static libraries do not actually link.  They are essentially
archives of object files.  The use of the name "linker" in the name
of this variable is kept for compatibility.

New in version 3.7.

Value used to initialize the CMAKE_STATIC_LINKER_FLAGS_<CONFIG> cache
entry the first time a build tree is configured.  This variable is
meant to be set by a toolchain file.  CMake may prepend or append
content to the value based on the environment and target platform.

New in version 3.7.

Value used to initialize the CMAKE_STATIC_LINKER_FLAGS cache entry the
first time a build tree is configured.  This variable is meant to be
set by a toolchain file.  CMake may prepend or append content to the
value based on the environment and target platform.

CMAKE_TRY_COMPILE_CONFIGURATION
Build configuration used for try_compile() and try_run() projects.

Projects built by try_compile() and try_run() are built synchronously
during the CMake configuration step.  Therefore a specific build
configuration must be chosen even if the generated build system
supports multiple configurations.

CMAKE_TRY_COMPILE_NO_PLATFORM_VARIABLES
New in version 3.24.

Set to a true value to tell the try_compile() command not to propagate
any platform variables into the test project.

The try_compile() command normally passes some CMake variables that
configure the platform and toolchain behavior into test projects.  See
policy CMP0137.  This variable may be set to disable that behavior.

CMAKE_TRY_COMPILE_PLATFORM_VARIABLES
New in version 3.6.

List of variables that the try_compile() command source file signature
must propagate into the test project in order to target the same
platform as the host project.

This variable should not be set by project code.  It is meant to be set
by CMake's platform information modules for the current toolchain, or
by a toolchain file when used with CMAKE_TOOLCHAIN_FILE.

Variables meaningful to CMake, such as CMAKE_<LANG>_FLAGS, are
propagated automatically.  The CMAKE_TRY_COMPILE_PLATFORM_VARIABLES
variable may be set to pass custom variables meaningful to a toolchain
file.  For example, a toolchain file may contain:

set(CMAKE_SYSTEM_NAME ...)
set(CMAKE_TRY_COMPILE_PLATFORM_VARIABLES MY_CUSTOM_VARIABLE)
# ... use MY_CUSTOM_VARIABLE ...

If a user passes -DMY_CUSTOM_VARIABLE=SomeValue to CMake then this
setting will be made visible to the toolchain file both for the main
project and for test projects generated by the try_compile() command
source file signature.

Changed in version 3.24: Listed variables are propagated to the
try_compile() whole-project signature too.  See CMP0137.

New in version 3.24: The CMAKE_TRY_COMPILE_NO_PLATFORM_VARIABLES
variable may be set to disable passing platform variables into the test
project.

CMAKE_TRY_COMPILE_TARGET_TYPE
New in version 3.6.

Type of target generated for try_compile() calls using the source file
signature.  Valid values are:

EXECUTABLE
Use add_executable() to name the source file in the generated
project.  This is the default if no value is given.

STATIC_LIBRARY
Use add_library() with the STATIC option to name the source file
in the generated project.  This avoids running the linker and is
intended for use with cross-compiling toolchains that cannot
link without custom flags or linker scripts.

CMAKE_UNITY_BUILD
New in version 3.16.

This variable is used to initialize the UNITY_BUILD property of targets
when they are created.  Setting it to true enables batch compilation of
multiple sources within each target.  This feature is known as a Unity
or Jumbo build.

Projects should not set this variable, it is intended as a developer
control to be set on the cmake(1) command line or other equivalent
methods.  The developer must have the ability to enable or disable
unity builds according to the capabilities of their own machine and
compiler.

By default, this variable is not set, which will result in unity builds
being disabled.

NOTE:
This option currently does not work well in combination with the
CMAKE_EXPORT_COMPILE_COMMANDS variable.

CMAKE_UNITY_BUILD_BATCH_SIZE
New in version 3.16.

This variable is used to initialize the UNITY_BUILD_BATCH_SIZE property
of targets when they are created.  It specifies the default upper limit
on the number of source files that may be combined in any one unity
source file when unity builds are enabled for a target.

CMAKE_UNITY_BUILD_UNIQUE_ID
New in version 3.20.

This variable is used to initialize the UNITY_BUILD_UNIQUE_ID property
of targets when they are created.  It specifies the name of the unique
identifier generated per file in a unity build.

CMAKE_USE_RELATIVE_PATHS
This variable has no effect.  The partially implemented effect it had
in previous releases was removed in CMake 3.4.

New in version 3.24.

This variable is used to initialize the VERIFY_INTERFACE_HEADER_SETS
property of targets when they are created.  Setting it to true enables

Projects should not normally set this variable, it is intended as a
developer control to be set on the cmake(1) command line or other
equivalent methods.  The developer must have the ability to enable or
disable header set verification according to the capabilities of their
own machine and compiler.

Verification of a dependency's header sets is not typically of interest
to developers.  Therefore, FetchContent_MakeAvailable() explicitly sets
CMAKE_VERIFY_INTERFACE_HEADER_SETS to false for the duration of its
call, but restores its original value before returning.  If a project
brings a dependency directly into the main build (e.g. calling
add_subdirectory() on a vendored project from a git submodule), it
should also do likewise.  For example:

# Save original setting so we can restore it later
set(want_header_set_verification ${CMAKE_VERIFY_INTERFACE_HEADER_SETS}) # Include the vendored dependency with header set verification disabled set(CMAKE_VERIFY_INTERFACE_HEADER_SETS OFF) add_subdirectory(...) # Vendored sources, e.g. from git submodules # Add the project's own sources. Restore the developer's original choice # for whether to enable header set verification. set(CMAKE_VERIFY_INTERFACE_HEADER_SETS${want_header_set_verification})

By default, this variable is not set, which will result in header set
verification being disabled.

CMAKE_VISIBILITY_INLINES_HIDDEN
Default value for the VISIBILITY_INLINES_HIDDEN target property when a
target is created.

CMAKE_VS_GLOBALS
New in version 3.13.

List of Key=Value records to be set per target as target properties
VS_GLOBAL_<variable> with variable=Key and value Value.

For example:

set(CMAKE_VS_GLOBALS
"DefaultLanguage=en-US"
"MinimumVisualStudioVersion=14.0"
)

will set properties VS_GLOBAL_DefaultLanguage to en-US and
VS_GLOBAL_MinimumVisualStudioVersion to 14.0 for all targets (except
for INTERFACE libraries).

This variable is meant to be set by a toolchain file.

CMAKE_VS_INCLUDE_INSTALL_TO_DEFAULT_BUILD
New in version 3.3.

Include INSTALL target to default build.

In Visual Studio solution, by default the INSTALL target will not be
part of the default build. Setting this variable will enable the
INSTALL target to be part of the default build.

CMAKE_VS_INCLUDE_PACKAGE_TO_DEFAULT_BUILD
New in version 3.8.

Include PACKAGE target to default build.

In Visual Studio solution, by default the PACKAGE target will not be
part of the default build. Setting this variable will enable the
PACKAGE target to be part of the default build.

CMAKE_VS_JUST_MY_CODE_DEBUGGING
New in version 3.15.

Enable Just My Code with Visual Studio debugger.

This variable is used to initialize the VS_JUST_MY_CODE_DEBUGGING
property on all targets when they are created.  See that target
property for additional information.

CMAKE_VS_NO_COMPILE_BATCHING
New in version 3.24.

Turn off compile batching when using Visual Studio Generators.

This variable is used to initialize the VS_NO_COMPILE_BATCHING property
on all targets when they are created.  See that target property for

Example
This shows setting the property for the target foo using the variable.

set(CMAKE_VS_NO_COMPILE_BATCHING ON)

CMAKE_VS_SDK_EXCLUDE_DIRECTORIES
New in version 3.12.

This variable allows to override Visual Studio default Exclude
Directories.

CMAKE_VS_SDK_EXECUTABLE_DIRECTORIES
New in version 3.12.

This variable allows to override Visual Studio default Executable
Directories.

CMAKE_VS_SDK_INCLUDE_DIRECTORIES
New in version 3.12.

This variable allows to override Visual Studio default Include
Directories.

CMAKE_VS_SDK_LIBRARY_DIRECTORIES
New in version 3.12.

This variable allows to override Visual Studio default Library
Directories.

CMAKE_VS_SDK_LIBRARY_WINRT_DIRECTORIES
New in version 3.12.

This variable allows to override Visual Studio default Library WinRT
Directories.

CMAKE_VS_SDK_REFERENCE_DIRECTORIES
New in version 3.12.

This variable allows to override Visual Studio default Reference
Directories.

CMAKE_VS_SDK_SOURCE_DIRECTORIES
New in version 3.12.

This variable allows to override Visual Studio default Source
Directories.

CMAKE_VS_WINRT_BY_DEFAULT
New in version 3.13.

Inform Visual Studio Generators for VS 2010 and above that the target
platform enables WinRT compilation by default and it needs to be
explicitly disabled if /ZW or VS_WINRT_COMPONENT is omitted (as opposed
to enabling it when either of those options is present)

This makes cmake configuration consistent in terms of WinRT among
platforms - if you did not enable the WinRT compilation explicitly, it
will be disabled (by either not enabling it or explicitly disabling it)

Note: WinRT compilation is always explicitly disabled for C language
source files, even if it is expliclty enabled for a project

This variable is meant to be set by a toolchain file for such
platforms.

CMAKE_WATCOM_RUNTIME_LIBRARY
New in version 3.24.

Select the Watcom runtime library for use by compilers targeting the
Watcom ABI.  This variable is used to initialize the
WATCOM_RUNTIME_LIBRARY property on all targets as they are created.  It
is also propagated by calls to the try_compile() command into the test
project.

The allowed values are:

Compile without additional flags to use a single-threaded

Compile with -br or equivalent flag(s) to use a single-threaded
dynamically-linked runtime library. This is not available for
Linux targets.

Compile with -bm or equivalent flag(s) to use a multi-threaded

Compile with -bm -br or equivalent flag(s) to use a
multi-threaded dynamically-linked runtime library. This is not
available for Linux targets.

The value is ignored on non-Watcom compilers but an unsupported value
will be rejected as an error when using a compiler targeting the Watcom
ABI.

The value may also be the empty string ("") in which case no runtime
library selection flag will be added explicitly by CMake.

Use generator expressions to support per-configuration specification.

For example, the code:

selects for all following targets a multi-threaded statically-linked
runtime library.

If this variable is not set then the WATCOM_RUNTIME_LIBRARY target
property will not be set automatically.  If that property is not set
then CMake uses the default value MultiThreadedDLL on Windows and
SingleThreaded on other platforms to select a Watcom runtime library.

NOTE:
This variable has effect only when policy CMP0136 is set to NEW
prior to the first project() or enable_language() command that
enables a language using a compiler targeting the Watcom ABI.

CMAKE_WIN32_EXECUTABLE
Default value for WIN32_EXECUTABLE of targets.

This variable is used to initialize the WIN32_EXECUTABLE property on
all the targets.  See that target property for additional information.

CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS
New in version 3.4.

Default value for WINDOWS_EXPORT_ALL_SYMBOLS target property.  This
variable is used to initialize the property on each target as it is
created.

CMAKE_XCODE_ATTRIBUTE_<an-attribute>
New in version 3.1.

Set Xcode target attributes directly.

Tell the Xcode generator to set <an-attribute> to a given value in the
generated Xcode project.  Ignored on other generators.

This offers low-level control over the generated Xcode project file.
It is meant as a last resort for specifying settings that CMake does
not otherwise have a way to control.  Although this can override a
setting CMake normally produces on its own, doing so bypasses CMake's
model of the project and can break things.

See the XCODE_ATTRIBUTE_<an-attribute> target property to set
attributes on a specific target.

Contents of CMAKE_XCODE_ATTRIBUTE_<an-attribute> may use "generator
expressions" with the syntax $<...>. See the cmake-generator-expressions(7) manual for available expressions. See the cmake-buildsystem(7) manual for more on defining buildsystem properties. EXECUTABLE_OUTPUT_PATH Old executable location variable. The target property RUNTIME_OUTPUT_DIRECTORY supersedes this variable for a target if it is set. Executable targets are otherwise placed in this directory. LIBRARY_OUTPUT_PATH Old library location variable. The target properties ARCHIVE_OUTPUT_DIRECTORY, LIBRARY_OUTPUT_DIRECTORY, and RUNTIME_OUTPUT_DIRECTORY supersede this variable for a target if they are set. Library targets are otherwise placed in this directory. VARIABLES FOR LANGUAGES CMAKE_COMPILER_IS_GNUCC True if the C compiler is GNU. This variable is deprecated. Use CMAKE_C_COMPILER_ID instead. CMAKE_COMPILER_IS_GNUCXX True if the C++ (CXX) compiler is GNU. This variable is deprecated. Use CMAKE_CXX_COMPILER_ID instead. CMAKE_COMPILER_IS_GNUG77 True if the Fortran compiler is GNU. This variable is deprecated. Use CMAKE_Fortran_COMPILER_ID instead. CMAKE_CUDA_ARCHITECTURES New in version 3.18. Default value for CUDA_ARCHITECTURES property of targets. Initialized by the CUDAARCHS environment variable if set. Otherwise as follows depending on CMAKE_CUDA_COMPILER_ID: o For Clang: the oldest architecture that works. o For NVIDIA: the default architecture chosen by the compiler. See policy CMP0104. Users are encouraged to override this, as the default varies across compilers and compiler versions. This variable is used to initialize the CUDA_ARCHITECTURES property on all targets. See the target property for additional information. Examples cmake_minimum_required(VERSION) if(NOT DEFINED CMAKE_CUDA_ARCHITECTURES) set(CMAKE_CUDA_ARCHITECTURES 75) endif() project(example LANGUAGES CUDA) CMAKE_CUDA_ARCHITECTURES will default to 75 unless overridden by the user. CMAKE_CUDA_COMPILE_FEATURES New in version 3.17. List of features known to the CUDA compiler These features are known to be available for use with the CUDA compiler. This list is a subset of the features listed in the CMAKE_CUDA_KNOWN_FEATURES global property. See the cmake-compile-features(7) manual for information on compile features and a list of supported compilers. CMAKE_CUDA_EXTENSIONS New in version 3.8. Default value for CUDA_EXTENSIONS target property if set when a target is created. See the cmake-compile-features(7) manual for information on compile features and a list of supported compilers. CMAKE_CUDA_HOST_COMPILER New in version 3.10. When CMAKE_CUDA_COMPILER_ID is NVIDIA, CMAKE_CUDA_HOST_COMPILER selects the compiler executable to use when compiling host code for CUDA language files. This maps to the nvcc -ccbin option. The CMAKE_CUDA_HOST_COMPILER variable may be set explicitly before CUDA is first enabled by a project() or enable_language() command. This can be done via -DCMAKE_CUDA_HOST_COMPILER=... on the command line or in a toolchain file. Or, one may set the CUDAHOSTCXX environment variable to provide a default value. Once the CUDA language is enabled, the CMAKE_CUDA_HOST_COMPILER variable is read-only and changes to it are undefined behavior. NOTE: Since CMAKE_CUDA_HOST_COMPILER is meaningful only when the CMAKE_CUDA_COMPILER_ID is NVIDIA, it does not make sense to set CMAKE_CUDA_HOST_COMPILER without also setting CMAKE_CUDA_COMPILER to NVCC. NOTE: Ignored when using Visual Studio Generators. CMAKE_CUDA_STANDARD New in version 3.8. Default value for CUDA_STANDARD target property if set when a target is created. See the cmake-compile-features(7) manual for information on compile features and a list of supported compilers. CMAKE_CUDA_STANDARD_REQUIRED New in version 3.8. Default value for CUDA_STANDARD_REQUIRED target property if set when a target is created. See the cmake-compile-features(7) manual for information on compile features and a list of supported compilers. CMAKE_CUDA_TOOLKIT_INCLUDE_DIRECTORIES New in version 3.8. When the CUDA language has been enabled, this provides a semicolon-separated list of include directories provided by the CUDA Toolkit. The value may be useful for C++ source files to include CUDA headers. CMAKE_CXX_COMPILE_FEATURES New in version 3.1. List of features known to the C++ compiler These features are known to be available for use with the C++ compiler. This list is a subset of the features listed in the CMAKE_CXX_KNOWN_FEATURES global property. See the cmake-compile-features(7) manual for information on compile features and a list of supported compilers. CMAKE_CXX_EXTENSIONS New in version 3.1. Default value for CXX_EXTENSIONS target property if set when a target is created. See the cmake-compile-features(7) manual for information on compile features and a list of supported compilers. CMAKE_CXX_STANDARD New in version 3.1. Default value for CXX_STANDARD target property if set when a target is created. See the cmake-compile-features(7) manual for information on compile features and a list of supported compilers. CMAKE_CXX_STANDARD_REQUIRED New in version 3.1. Default value for CXX_STANDARD_REQUIRED target property if set when a target is created. See the cmake-compile-features(7) manual for information on compile features and a list of supported compilers. CMAKE_C_COMPILE_FEATURES New in version 3.1. List of features known to the C compiler These features are known to be available for use with the C compiler. This list is a subset of the features listed in the CMAKE_C_KNOWN_FEATURES global property. See the cmake-compile-features(7) manual for information on compile features and a list of supported compilers. CMAKE_C_EXTENSIONS New in version 3.1. Default value for C_EXTENSIONS target property if set when a target is created. See the cmake-compile-features(7) manual for information on compile features and a list of supported compilers. CMAKE_C_STANDARD New in version 3.1. Default value for C_STANDARD target property if set when a target is created. See the cmake-compile-features(7) manual for information on compile features and a list of supported compilers. CMAKE_C_STANDARD_REQUIRED New in version 3.1. Default value for C_STANDARD_REQUIRED target property if set when a target is created. See the cmake-compile-features(7) manual for information on compile features and a list of supported compilers. CMAKE_Fortran_MODDIR_DEFAULT Fortran default module output directory. Most Fortran compilers write .mod files to the current working directory. For those that do not, this is set to . and used when the Fortran_MODULE_DIRECTORY target property is not set. CMAKE_Fortran_MODDIR_FLAG Fortran flag for module output directory. This stores the flag needed to pass the value of the Fortran_MODULE_DIRECTORY target property to the compiler. CMAKE_Fortran_MODOUT_FLAG Fortran flag to enable module output. Most Fortran compilers write .mod files out by default. For others, this stores the flag needed to enable module output. CMAKE_HIP_ARCHITECTURES New in version 3.21. Default value for HIP_ARCHITECTURES property of targets. This is initialized to the architectures reported by rocm_agent_enumerator, if available, and otherwise to the default chosen by the compiler. This variable is used to initialize the HIP_ARCHITECTURES property on all targets. See the target property for additional information. CMAKE_HIP_EXTENSIONS New in version 3.21. Default value for HIP_EXTENSIONS target property if set when a target is created. See the cmake-compile-features(7) manual for information on compile features and a list of supported compilers. CMAKE_HIP_STANDARD New in version 3.21. Default value for HIP_STANDARD target property if set when a target is created. See the cmake-compile-features(7) manual for information on compile features and a list of supported compilers. CMAKE_HIP_STANDARD_REQUIRED New in version 3.21. Default value for HIP_STANDARD_REQUIRED target property if set when a target is created. See the cmake-compile-features(7) manual for information on compile features and a list of supported compilers. CMAKE_ISPC_HEADER_DIRECTORY New in version 3.19. ISPC generated header output directory. This variable is used to initialize the ISPC_HEADER_DIRECTORY property on all the targets. See the target property for additional information. CMAKE_ISPC_HEADER_SUFFIX New in version 3.19.2. Output suffix to be used for ISPC generated headers. This variable is used to initialize the ISPC_HEADER_SUFFIX property on all the targets. See the target property for additional information. CMAKE_ISPC_INSTRUCTION_SETS New in version 3.19. Default value for ISPC_INSTRUCTION_SETS property of targets. This variable is used to initialize the ISPC_INSTRUCTION_SETS property on all targets. See the target property for additional information. CMAKE_<LANG>_ANDROID_TOOLCHAIN_MACHINE New in version 3.7.1. When Cross Compiling for Android this variable contains the toolchain binutils machine name (e.g. gcc -dumpmachine). The binutils typically have a <machine>- prefix on their name. See also CMAKE_<LANG>_ANDROID_TOOLCHAIN_PREFIX and CMAKE_<LANG>_ANDROID_TOOLCHAIN_SUFFIX. CMAKE_<LANG>_ANDROID_TOOLCHAIN_PREFIX New in version 3.7. When Cross Compiling for Android this variable contains the absolute path prefixing the toolchain GNU compiler and its binutils. See also CMAKE_<LANG>_ANDROID_TOOLCHAIN_SUFFIX and CMAKE_<LANG>_ANDROID_TOOLCHAIN_MACHINE. For example, the path to the linker is:${CMAKE_CXX_ANDROID_TOOLCHAIN_PREFIX}ld${CMAKE_CXX_ANDROID_TOOLCHAIN_SUFFIX} CMAKE_<LANG>_ANDROID_TOOLCHAIN_SUFFIX New in version 3.7. When Cross Compiling for Android this variable contains the host platform suffix of the toolchain GNU compiler and its binutils. See also CMAKE_<LANG>_ANDROID_TOOLCHAIN_PREFIX and CMAKE_<LANG>_ANDROID_TOOLCHAIN_MACHINE. CMAKE_<LANG>_ARCHIVE_APPEND Rule variable to append to a static archive. This is a rule variable that tells CMake how to append to a static archive. It is used in place of CMAKE_<LANG>_CREATE_STATIC_LIBRARY on some platforms in order to support large object counts. See also CMAKE_<LANG>_ARCHIVE_CREATE and CMAKE_<LANG>_ARCHIVE_FINISH. CMAKE_<LANG>_ARCHIVE_CREATE Rule variable to create a new static archive. This is a rule variable that tells CMake how to create a static archive. It is used in place of CMAKE_<LANG>_CREATE_STATIC_LIBRARY on some platforms in order to support large object counts. See also CMAKE_<LANG>_ARCHIVE_APPEND and CMAKE_<LANG>_ARCHIVE_FINISH. CMAKE_<LANG>_ARCHIVE_FINISH Rule variable to finish an existing static archive. This is a rule variable that tells CMake how to finish a static archive. It is used in place of CMAKE_<LANG>_CREATE_STATIC_LIBRARY on some platforms in order to support large object counts. See also CMAKE_<LANG>_ARCHIVE_CREATE and CMAKE_<LANG>_ARCHIVE_APPEND. CMAKE_<LANG>_BYTE_ORDER New in version 3.20. Byte order of <LANG> compiler target architecture, if known. If defined and not empty, the value is one of: BIG_ENDIAN The target architecture is Big Endian. LITTLE_ENDIAN The target architecture is Little Endian. This is defined for languages C, CXX, OBJC, OBJCXX, and CUDA. If CMAKE_OSX_ARCHITECTURES specifies multiple architectures, the value of CMAKE_<LANG>_BYTE_ORDER is non-empty only if all architectures share the same byte order. CMAKE_<LANG>_COMPILER The full path to the compiler for LANG. This is the command that will be used as the <LANG> compiler. Once set, you can not change this variable. Usage This variable can be set by the user during the first time a build tree is configured. If a non-full path value is supplied then CMake will resolve the full path of the compiler. The variable could be set in a user supplied toolchain file or via -D on the command line. NOTE: Options that are required to make the compiler work correctly can be included as items in a list; they can not be changed. #set within user supplied toolchain file set(CMAKE_C_COMPILER /full/path/to/qcc --arg1 --arg2) or$ cmake ... -DCMAKE_C_COMPILER='qcc;--arg1;--arg2'

CMAKE_<LANG>_COMPILER_EXTERNAL_TOOLCHAIN
The external toolchain for cross-compiling, if supported.

Some compiler toolchains do not ship their own auxiliary utilities such
as archivers and linkers.  The compiler driver may support a
command-line argument to specify the location of such tools.
CMAKE_<LANG>_COMPILER_EXTERNAL_TOOLCHAIN may be set to a path to the
external toolchain and will be passed to the compiler driver if
supported.

This variable may only be set in a toolchain file specified by the
CMAKE_TOOLCHAIN_FILE variable.

CMAKE_<LANG>_COMPILER_ID
Compiler identification string.

A short string unique to the compiler vendor.  Possible values include:

Absoft = Absoft Fortran (absoft.com)
ADSP = Analog VisualDSP++ (analog.com)
AppleClang = Apple Clang (apple.com)
ARMCC = ARM Compiler (arm.com)
ARMClang = ARM Compiler based on Clang (arm.com)
Bruce = Bruce C Compiler
CCur = Concurrent Fortran (ccur.com)
Clang = LLVM Clang (clang.llvm.org)
Cray = Cray Compiler (cray.com)
Flang = Classic Flang Fortran Compiler (https://github.com/flang-compiler/flang)
LLVMFlang = LLVM Flang Fortran Compiler (https://github.com/llvm/llvm-project/tree/main/flang)
Fujitsu = Fujitsu HPC compiler (Trad mode)
FujitsuClang = Fujitsu HPC compiler (Clang mode)
G95 = G95 Fortran (g95.org)
GNU = GNU Compiler Collection (gcc.gnu.org)
GHS = Green Hills Software (www.ghs.com)
HP = Hewlett-Packard Compiler (hp.com)
IAR = IAR Systems (iar.com)
Intel = Intel Compiler (intel.com)
IntelLLVM = Intel LLVM-Based Compiler (intel.com)
LCC = MCST Elbrus C/C++/Fortran Compiler (mcst.ru)
MSVC = Microsoft Visual Studio (microsoft.com)
NVHPC = NVIDIA HPC SDK Compiler (nvidia.com)
NVIDIA = NVIDIA CUDA Compiler (nvidia.com)
OpenWatcom = Open Watcom (openwatcom.org)
PGI = The Portland Group (pgroup.com)
PathScale = PathScale (pathscale.com)
SDCC = Small Device C Compiler (sdcc.sourceforge.net)
SunPro = Oracle Solaris Studio (oracle.com)
TI = Texas Instruments (ti.com)
TinyCC = Tiny C Compiler (tinycc.org)
XL, VisualAge, zOS = IBM XL (ibm.com)
XLClang = IBM Clang-based XL (ibm.com)
IBMClang = IBM LLVM-based Compiler (ibm.com)

This variable is not guaranteed to be defined for all compilers or
languages.

Defined to true if the language is enabled.

When language <LANG> is enabled by project() or enable_language() this
variable is defined to 1.

CMAKE_<LANG>_COMPILER_PREDEFINES_COMMAND
New in version 3.10.

Command that outputs the compiler pre definitions.

See AUTOMOC which uses CMAKE_CXX_COMPILER_PREDEFINES_COMMAND to
generate the AUTOMOC_COMPILER_PREDEFINES.

CMAKE_<LANG>_COMPILER_TARGET
The target for cross-compiling, if supported.

Some compiler drivers are inherently cross-compilers, such as clang and
QNX qcc. These compiler drivers support a command-line argument to
specify the target to cross-compile for.

This variable may only be set in a toolchain file specified by the
CMAKE_TOOLCHAIN_FILE variable.

CMAKE_<LANG>_COMPILER_VERSION
Compiler version string.

Compiler version in major[.minor[.patch[.tweak]]] format.  This
variable is not guaranteed to be defined for all compilers or
languages.

For example CMAKE_C_COMPILER_VERSION and CMAKE_CXX_COMPILER_VERSION
might indicate the respective C and C++ compiler version.

CMAKE_<LANG>_COMPILE_OBJECT
Rule variable to compile a single object file.

This is a rule variable that tells CMake how to compile a single object
file for the language <LANG>.

CMAKE_<LANG>_CREATE_SHARED_LIBRARY
Rule variable to create a shared library.

This is a rule variable that tells CMake how to create a shared library
for the language <LANG>.  This rule variable is a ; delimited list of
commands to run to perform the linking step.

CMAKE_<LANG>_CREATE_SHARED_MODULE
Rule variable to create a shared module.

This is a rule variable that tells CMake how to create a shared library
for the language <LANG>.  This rule variable is a ; delimited list of
commands to run.

CMAKE_<LANG>_CREATE_STATIC_LIBRARY
Rule variable to create a static library.

This is a rule variable that tells CMake how to create a static library
for the language <LANG>.

CMAKE_<LANG>_EXTENSIONS
The variations are:

o CMAKE_C_EXTENSIONS

o CMAKE_CXX_EXTENSIONS

o CMAKE_CUDA_EXTENSIONS

o CMAKE_HIP_EXTENSIONS

o CMAKE_OBJC_EXTENSIONS

o CMAKE_OBJCXX_EXTENSIONS

Default values for <LANG>_EXTENSIONS target properties if set when a
target is created.  For the compiler's default setting see
CMAKE_<LANG>_EXTENSIONS_DEFAULT.

For supported CMake versions see the respective pages.

See the cmake-compile-features(7) manual for information on compile
features and a list of supported compilers.

CMAKE_<LANG>_EXTENSIONS_DEFAULT
New in version 3.22.

Compiler's default extensions mode. Used as the default for the
<LANG>_EXTENSIONS target property when CMAKE_<LANG>_EXTENSIONS is not
set (see CMP0128).

This variable is read-only.  Modifying it is undefined behavior.

CMAKE_<LANG>_FLAGS
Flags for all build types.

<LANG> flags used regardless of the value of CMAKE_BUILD_TYPE.

This is initialized for each language from environment variables:

o CMAKE_C_FLAGS: Initialized by the CFLAGS environment variable.

o CMAKE_CXX_FLAGS: Initialized by the CXXFLAGS environment variable.

o CMAKE_CUDA_FLAGS: Initialized by the CUDAFLAGS environment variable.

o CMAKE_Fortran_FLAGS: Initialized by the FFLAGS environment variable.

This value is a command-line string fragment. Therefore, multiple
options should be separated by spaces, and options with spaces should
be quoted.

The flags in this variable will be passed to the compiler before those
in the per-configuration CMAKE_<LANG>_FLAGS_<CONFIG> variant, and
before flags added by the add_compile_options() or
target_compile_options() commands.

CMAKE_<LANG>_FLAGS_<CONFIG>
Flags for language <LANG> when building for the <CONFIG> configuration.

The flags in this variable will be passed to the compiler after those
in the CMAKE_<LANG>_FLAGS variable, but before flags added by the
add_compile_options() or target_compile_options() commands.

CMAKE_<LANG>_FLAGS_<CONFIG>_INIT
New in version 3.11.

Value used to initialize the CMAKE_<LANG>_FLAGS_<CONFIG> cache entry
the first time a build tree is configured for language <LANG>.  This
variable is meant to be set by a toolchain file.  CMake may prepend or
append content to the value based on the environment and target
platform.

CMAKE_<LANG>_FLAGS_DEBUG
This variable is the Debug variant of the CMAKE_<LANG>_FLAGS_<CONFIG>
variable.

CMAKE_<LANG>_FLAGS_DEBUG_INIT
New in version 3.7.

This variable is the Debug variant of the
CMAKE_<LANG>_FLAGS_<CONFIG>_INIT variable.

CMAKE_<LANG>_FLAGS_INIT
New in version 3.7.

Value used to initialize the CMAKE_<LANG>_FLAGS cache entry the first
time a build tree is configured for language <LANG>.  This variable is
meant to be set by a toolchain file.  CMake may prepend or append
content to the value based on the environment and target platform.  For
example, the contents of a xxxFLAGS environment variable will be
prepended, where xxx will be language-specific but not necessarily the
same as <LANG> (e.g. CXXFLAGS for CXX, FFLAGS for Fortran, and so on).
This value is a command-line string fragment. Therefore, multiple
options should be separated by spaces, and options with spaces should
be quoted.

variable.

CMAKE_<LANG>_FLAGS_MINSIZEREL
This variable is the MinSizeRel variant of the
CMAKE_<LANG>_FLAGS_<CONFIG> variable.

CMAKE_<LANG>_FLAGS_MINSIZEREL_INIT
New in version 3.7.

This variable is the MinSizeRel variant of the
CMAKE_<LANG>_FLAGS_<CONFIG>_INIT variable.

CMAKE_<LANG>_FLAGS_RELEASE
This variable is the Release variant of the CMAKE_<LANG>_FLAGS_<CONFIG>
variable.

CMAKE_<LANG>_FLAGS_RELEASE_INIT
New in version 3.7.

This variable is the Release variant of the
CMAKE_<LANG>_FLAGS_<CONFIG>_INIT variable.

CMAKE_<LANG>_FLAGS_RELWITHDEBINFO
This variable is the RelWithDebInfo variant of the
CMAKE_<LANG>_FLAGS_<CONFIG> variable.

CMAKE_<LANG>_FLAGS_RELWITHDEBINFO_INIT
New in version 3.7.

This variable is the RelWithDebInfo variant of the
CMAKE_<LANG>_FLAGS_<CONFIG>_INIT variable.

CMAKE_<LANG>_IGNORE_EXTENSIONS
File extensions that should be ignored by the build.

This is a list of file extensions that may be part of a project for a
given language but are not compiled.

CMAKE_<LANG>_IMPLICIT_INCLUDE_DIRECTORIES
Directories implicitly searched by the compiler for header files.

CMake does not explicitly specify these directories on compiler command
lines for language <LANG>.  This prevents system include directories
from being treated as user include directories on some compilers, which
is important for C, CXX, and CUDA to avoid overriding standard library

This value is not used for Fortran because it has no standard library
headers and some compilers do not search their implicit include
directories for module .mod files.

Implicit linker search path detected for language <LANG>.

Compilers typically pass directories containing language runtime
libraries and default library search paths when they invoke a linker.
These paths are implicit linker search directories for the compiler's
language.  For each language enabled by the project() or
enable_language() command, CMake automatically detects these
directories and reports the results in this variable.

When linking to a static library, CMake adds the implicit link
directories from this variable for each language used in the static
library (except the language whose compiler is used to drive linking).
In the case of an imported static library, the
IMPORTED_LINK_INTERFACE_LANGUAGES target property lists the languages
whose implicit link information is needed.  If any of the languages is
not enabled, its value for the CMAKE_<LANG>_IMPLICIT_LINK_DIRECTORIES
variable may instead be provided by the project.  Or, a toolchain file
may set the variable to a value known for the specified toolchain.  It
will either be overridden when the language is enabled, or used as a
fallback.

Some toolchains read implicit directories from an environment variable
such as LIBRARY_PATH.  If using such an environment variable, keep its
value consistent when operating in a given build tree because CMake
saves the value detected when first creating a build tree.

If policy CMP0060 is not set to NEW, then when a library in one of
these directories is given by full path to target_link_libraries()
CMake will generate the -l<name> form on link lines for historical
purposes.

Implicit linker framework search path detected for language <LANG>.

These paths are implicit linker framework search directories for the
compiler's language.  CMake automatically detects these directories for
each language and reports the results in this variable.

Implicit link libraries and flags detected for language <LANG>.

Compilers typically pass language runtime library names and other flags
when they invoke a linker.  These flags are implicit link options for
the compiler's language.  For each language enabled by the project() or
enable_language() command, CMake automatically detects these libraries
and flags and reports the results in this variable.

When linking to a static library, CMake adds the implicit link
libraries and flags from this variable for each language used in the
static library (except the language whose compiler is used to drive
linking).  In the case of an imported static library, the
IMPORTED_LINK_INTERFACE_LANGUAGES target property lists the languages
whose implicit link information is needed.  If any of the languages is
not enabled, its value for the CMAKE_<LANG>_IMPLICIT_LINK_LIBRARIES
variable may instead be provided by the project.  Or, a toolchain file
may set the variable to a value known for the specified toolchain.  It
will either be overridden when the language is enabled, or used as a
fallback.

CMAKE_<LANG>_LIBRARY_ARCHITECTURE
Target architecture library directory name detected for <LANG>.

If the <LANG> compiler passes to the linker an architecture-specific
system library search directory such as <prefix>/lib/<arch> this
variable contains the <arch> name if/as detected by CMake.

Rule variable to link an executable.

Rule variable to link an executable for the given language.

New in version 3.13.

Defines the syntax of compiler driver option to pass options to the
linker tool. It will be used to translate the LINKER: prefix in the

This variable holds a semicolon-separated list of tokens.  If a space
(i.e. " ") is specified as last token, flag and LINKER: arguments will
be specified as separate arguments to the compiler driver.  The
CMAKE_<LANG>_LINKER_WRAPPER_FLAG_SEP variable can be specified to
manage concatenation of arguments.

For example, for Clang we have:

defs.

For GNU GCC:

Specifying "LINKER:-z,defs" will be transformed in -Wl,-z,defs.

And for SunPro:

set (CMAKE_C_LINKER_WRAPPER_FLAG "-Qoption" "ld" " ")

Specifying "LINKER:-z,defs" will be transformed in -Qoption ld -z,defs.

New in version 3.13.

This variable is used with CMAKE_<LANG>_LINKER_WRAPPER_FLAG variable to

When specified, arguments of the LINKER: prefix will be concatenated
using this value as separator.

CMAKE_<LANG>_OUTPUT_EXTENSION
Extension for the output of a compile for a single file.

This is the extension for an object file for the given <LANG>.  For
example .obj for C on Windows.

CMAKE_<LANG>_SIMULATE_ID
Identification string of the "simulated" compiler.

Some compilers simulate other compilers to serve as drop-in
replacements.  When CMake detects such a compiler it sets this variable
to what would have been the CMAKE_<LANG>_COMPILER_ID for the simulated
compiler.

NOTE:
In other words, this variable describes the ABI compatibility of the
generated code.

CMAKE_<LANG>_SIMULATE_VERSION
Version string of "simulated" compiler.

Some compilers simulate other compilers to serve as drop-in
replacements.  When CMake detects such a compiler it sets this variable
to what would have been the CMAKE_<LANG>_COMPILER_VERSION for the
simulated compiler.

CMAKE_<LANG>_SIZEOF_DATA_PTR
Size of pointer-to-data types for language <LANG>.

This holds the size (in bytes) of pointer-to-data types in the target
platform ABI.  It is defined for languages C and CXX (C++).

CMAKE_<LANG>_SOURCE_FILE_EXTENSIONS
Extensions of source files for the given language.

This is the list of extensions for a given language's source files.

CMAKE_<LANG>_STANDARD
The variations are:

o CMAKE_C_STANDARD

o CMAKE_CXX_STANDARD

o CMAKE_CUDA_STANDARD

o CMAKE_HIP_STANDARD

o CMAKE_OBJC_STANDARD

o CMAKE_OBJCXX_STANDARD

Default values for <LANG>_STANDARD target properties if set when a
target is created.

For supported CMake versions see the respective pages.

See the cmake-compile-features(7) manual for information on compile
features and a list of supported compilers.

CMAKE_<LANG>_STANDARD_DEFAULT
New in version 3.9.

The compiler's default standard for the language <LANG>. Empty if the
compiler has no conception of standard levels.

CMAKE_<LANG>_STANDARD_INCLUDE_DIRECTORIES
New in version 3.6.

Include directories to be used for every source file compiled with the
<LANG> compiler.  This is meant for specification of system include
directories needed by the language for the current platform.  The
directories always appear at the end of the include path passed to the
compiler.

This variable should not be set by project code.  It is meant to be set
by CMake's platform information modules for the current toolchain, or
by a toolchain file when used with CMAKE_TOOLCHAIN_FILE.

CMAKE_<LANG>_STANDARD_LIBRARIES
New in version 3.6.

Libraries linked into every executable and shared library linked for
language <LANG>.  This is meant for specification of system libraries
needed by the language for the current platform.

This variable should not be set by project code.  It is meant to be set
by CMake's platform information modules for the current toolchain, or
by a toolchain file when used with CMAKE_TOOLCHAIN_FILE.

CMAKE_<LANG>_STANDARD_REQUIRED
The variations are:

o CMAKE_C_STANDARD_REQUIRED

o CMAKE_CXX_STANDARD_REQUIRED

o CMAKE_CUDA_STANDARD_REQUIRED

o CMAKE_HIP_STANDARD_REQUIRED

o CMAKE_OBJC_STANDARD_REQUIRED

o CMAKE_OBJCXX_STANDARD_REQUIRED

Default values for <LANG>_STANDARD_REQUIRED target properties if set
when a target is created.

For supported CMake versions see the respective pages.

See the cmake-compile-features(7) manual for information on compile
features and a list of supported compilers.

CMAKE_OBJC_EXTENSIONS
New in version 3.16.

Default value for OBJC_EXTENSIONS target property if set when a target
is created.

See the cmake-compile-features(7) manual for information on compile
features and a list of supported compilers.

CMAKE_OBJC_STANDARD
New in version 3.16.

Default value for OBJC_STANDARD target property if set when a target is
created.

See the cmake-compile-features(7) manual for information on compile
features and a list of supported compilers.

CMAKE_OBJC_STANDARD_REQUIRED
New in version 3.16.

Default value for OBJC_STANDARD_REQUIRED target property if set when a
target is created.

See the cmake-compile-features(7) manual for information on compile
features and a list of supported compilers.

CMAKE_OBJCXX_EXTENSIONS
New in version 3.16.

Default value for OBJCXX_EXTENSIONS target property if set when a
target is created.

See the cmake-compile-features(7) manual for information on compile
features and a list of supported compilers.

CMAKE_OBJCXX_STANDARD
New in version 3.16.

Default value for OBJCXX_STANDARD target property if set when a target
is created.

See the cmake-compile-features(7) manual for information on compile
features and a list of supported compilers.

CMAKE_OBJCXX_STANDARD_REQUIRED
New in version 3.16.

Default value for OBJCXX_STANDARD_REQUIRED target property if set when
a target is created.

See the cmake-compile-features(7) manual for information on compile
features and a list of supported compilers.

CMAKE_Swift_LANGUAGE_VERSION
New in version 3.7.

Set to the Swift language version number.  If not set, the oldest
legacy version known to be available in the host Xcode version is
assumed:

o Swift 4.0 for Xcode 10.2 and above.

o Swift 3.0 for Xcode 8.3 and above.

o Swift 2.3 for Xcode 8.2 and below.

CMAKE_USER_MAKE_RULES_OVERRIDE_<LANG>
Specify a CMake file that overrides platform information for <LANG>.

This is a language-specific version of CMAKE_USER_MAKE_RULES_OVERRIDE
loaded only when enabling language <LANG>.

VARIABLES FOR CTEST
CTEST_BINARY_DIRECTORY
New in version 3.1.

Specify the CTest BuildDirectory setting in a ctest(1) dashboard client
script.

CTEST_BUILD_COMMAND
New in version 3.1.

Specify the CTest MakeCommand setting in a ctest(1) dashboard client
script.

CTEST_BUILD_NAME
New in version 3.1.

Specify the CTest BuildName setting in a ctest(1) dashboard client
script.

CTEST_BZR_COMMAND
New in version 3.1.

Specify the CTest BZRCommand setting in a ctest(1) dashboard client
script.

CTEST_BZR_UPDATE_OPTIONS
New in version 3.1.

Specify the CTest BZRUpdateOptions setting in a ctest(1) dashboard
client script.

CTEST_CHANGE_ID
New in version 3.4.

Specify the CTest ChangeId setting in a ctest(1) dashboard client
script.

This setting allows CTest to pass arbitrary information about this
build up to CDash.  One use of this feature is to allow CDash to post
comments on your pull request if anything goes wrong with your build.

CTEST_CHECKOUT_COMMAND
New in version 3.1.

Tell the ctest_start() command how to checkout or initialize the source
directory in a ctest(1) dashboard client script.

CTEST_CONFIGURATION_TYPE
New in version 3.1.

Specify the CTest DefaultCTestConfigurationType setting in a ctest(1)
dashboard client script.

If the configuration type is set via -C <cfg> from the command line
then this variable is populated accordingly.

CTEST_CONFIGURE_COMMAND
New in version 3.1.

Specify the CTest ConfigureCommand setting in a ctest(1) dashboard
client script.

CTEST_COVERAGE_COMMAND
New in version 3.1.

Specify the CTest CoverageCommand setting in a ctest(1) dashboard
client script.

Cobertura
Using Cobertura as the coverage generation within your multi-module
Java project can generate a series of XML files.

The Cobertura Coverage parser expects to read the coverage data from a
single XML file which contains the coverage data for all modules.
Cobertura has a program with the ability to merge given cobertura.ser
files and then another program to generate a combined XML file from the
previous merged file.  For command line testing, this can be done by
hand prior to CTest looking for the coverage files. For script builds,
set the CTEST_COVERAGE_COMMAND variable to point to a file which will
perform these same steps, such as a .sh or .bat file.

set(CTEST_COVERAGE_COMMAND .../run-coverage-and-consolidate.sh)

where the run-coverage-and-consolidate.sh script is perhaps created by
the configure_file() command and might contain the following code:

#!/usr/bin/env bash
CoberturaFiles="$(find "/path/to/source" -name "cobertura.ser")" SourceDirs="$(find "/path/to/source" -name "java" -type d)"
cobertura-merge --datafile coberturamerge.ser $CoberturaFiles cobertura-report --datafile coberturamerge.ser --destination . \ --format xml$SourceDirs

The script uses find to capture the paths to all of the cobertura.ser
files found below the project's source directory.  It keeps the list of
files and supplies it as an argument to the cobertura-merge program.
The --datafile argument signifies where the result of the merge will be
kept.

The combined coberturamerge.ser file is then used to generate the XML
report using the cobertura-report program.  The call to the
cobertura-report program requires some named arguments.

--datafila
path to the merged .ser file

--destination
path to put the output files(s)

--format
file format to write output in: xml or html

The rest of the supplied arguments consist of the full paths to the
/src/main/java directories of each module within the source tree. These
directories are needed and should not be forgotten.

CTEST_COVERAGE_EXTRA_FLAGS
New in version 3.1.

Specify the CTest CoverageExtraFlags setting in a ctest(1) dashboard
client script.

CTEST_CURL_OPTIONS
New in version 3.1.

Specify the CTest CurlOptions setting in a ctest(1) dashboard client
script.

CTEST_CUSTOM_COVERAGE_EXCLUDE
A list of regular expressions which will be used to exclude files by
their path from coverage output by the ctest_coverage() command.

It is initialized by ctest(1), but may be edited in a CTestCustom file.

CTEST_CUSTOM_ERROR_EXCEPTION
A list of regular expressions which will be used to exclude when
detecting error messages in build outputs by the ctest_test() command.

It is initialized by ctest(1), but may be edited in a CTestCustom file.

CTEST_CUSTOM_ERROR_MATCH
A list of regular expressions which will be used to detect error
messages in build outputs by the ctest_test() command.

It is initialized by ctest(1), but may be edited in a CTestCustom file.

CTEST_CUSTOM_ERROR_POST_CONTEXT
The number of lines to include as context which follow an error message
by the ctest_test() command. The default is 10.

It is initialized by ctest(1), but may be edited in a CTestCustom file.

CTEST_CUSTOM_ERROR_PRE_CONTEXT
The number of lines to include as context which precede an error
message by the ctest_test() command. The default is 10.

It is initialized by ctest(1), but may be edited in a CTestCustom file.

CTEST_CUSTOM_MAXIMUM_FAILED_TEST_OUTPUT_SIZE
When saving a failing test's output, this is the maximum size, in
bytes, that will be collected by the ctest_test() command. Defaults to
307200 (300 KiB). See CTEST_CUSTOM_TEST_OUTPUT_TRUNCATION for possible
truncation modes.

If a test's output contains the literal string "CTEST_FULL_OUTPUT", the
output will not be truncated and may exceed the maximum size.

It is initialized by ctest(1), but may be edited in a CTestCustom file.

For controlling the output collection of passing tests, see
CTEST_CUSTOM_MAXIMUM_PASSED_TEST_OUTPUT_SIZE.

CTEST_CUSTOM_MAXIMUM_NUMBER_OF_ERRORS
The maximum number of errors in a single build step which will be
detected.  After this, the ctest_test() command will truncate the
output.  Defaults to 50.

It is initialized by ctest(1), but may be edited in a CTestCustom file.

CTEST_CUSTOM_MAXIMUM_NUMBER_OF_WARNINGS
The maximum number of warnings in a single build step which will be
detected.  After this, the ctest_test() command will truncate the
output.  Defaults to 50.

It is initialized by ctest(1), but may be edited in a CTestCustom file.

CTEST_CUSTOM_MAXIMUM_PASSED_TEST_OUTPUT_SIZE
When saving a passing test's output, this is the maximum size, in
bytes, that will be collected by the ctest_test() command. Defaults to
1024 (1 KiB). See CTEST_CUSTOM_TEST_OUTPUT_TRUNCATION for possible
truncation modes.

If a test's output contains the literal string "CTEST_FULL_OUTPUT", the
output will not be truncated and may exceed the maximum size.

It is initialized by ctest(1), but may be edited in a CTestCustom file.

For controlling the output collection of failing tests, see
CTEST_CUSTOM_MAXIMUM_FAILED_TEST_OUTPUT_SIZE.

CTEST_CUSTOM_TEST_OUTPUT_TRUNCATION
New in version 3.24.

Set the test output truncation mode in case a maximum size is
configured via the CTEST_CUSTOM_MAXIMUM_PASSED_TEST_OUTPUT_SIZE or
CTEST_CUSTOM_MAXIMUM_FAILED_TEST_OUTPUT_SIZE variables.  By default the
tail of the output will be truncated. Other possible values are middle

It is initialized by ctest(1), but may be edited in a CTestCustom file.

CTEST_CUSTOM_MEMCHECK_IGNORE
A list of regular expressions to use to exclude tests during the
ctest_memcheck() command.

It is initialized by ctest(1), but may be edited in a CTestCustom file.

CTEST_CUSTOM_POST_MEMCHECK
A list of commands to run at the end of the ctest_memcheck() command.

It is initialized by ctest(1), but may be edited in a CTestCustom file.

CTEST_CUSTOM_POST_TEST
A list of commands to run at the end of the ctest_test() command.

It is initialized by ctest(1), but may be edited in a CTestCustom file.

CTEST_CUSTOM_PRE_MEMCHECK
A list of commands to run at the start of the ctest_memcheck() command.

It is initialized by ctest(1), but may be edited in a CTestCustom file.

CTEST_CUSTOM_PRE_TEST
A list of commands to run at the start of the ctest_test() command.

It is initialized by ctest(1), but may be edited in a CTestCustom file.

CTEST_CUSTOM_TESTS_IGNORE
A list of test names to be excluded from the set of tests run by the
ctest_test() command.

It is initialized by ctest(1), but may be edited in a CTestCustom file.

CTEST_CUSTOM_WARNING_EXCEPTION
A list of regular expressions which will be used to exclude when
detecting warning messages in build outputs by the ctest_build()
command.

It is initialized by ctest(1), but may be edited in a CTestCustom file.

CTEST_CUSTOM_WARNING_MATCH
A list of regular expressions which will be used to detect warning
messages in build outputs by the ctest_build() command.

It is initialized by ctest(1), but may be edited in a CTestCustom file.

CTEST_CVS_CHECKOUT
New in version 3.1.

Deprecated.  Use CTEST_CHECKOUT_COMMAND instead.

CTEST_CVS_COMMAND
New in version 3.1.

Specify the CTest CVSCommand setting in a ctest(1) dashboard client
script.

CTEST_CVS_UPDATE_OPTIONS
New in version 3.1.

Specify the CTest CVSUpdateOptions setting in a ctest(1) dashboard
client script.

CTEST_DROP_LOCATION
New in version 3.1.

Specify the CTest DropLocation setting in a ctest(1) dashboard client
script.

CTEST_DROP_METHOD
New in version 3.1.

Specify the CTest DropMethod setting in a ctest(1) dashboard client
script.

CTEST_DROP_SITE
New in version 3.1.

Specify the CTest DropSite setting in a ctest(1) dashboard client
script.

CTEST_DROP_SITE_CDASH
New in version 3.1.

Specify the CTest IsCDash setting in a ctest(1) dashboard client
script.

New in version 3.1.

Specify the CTest DropSitePassword setting in a ctest(1) dashboard
client script.

CTEST_DROP_SITE_USER
New in version 3.1.

Specify the CTest DropSiteUser setting in a ctest(1) dashboard client
script.

CTEST_EXTRA_COVERAGE_GLOB
New in version 3.4.

A list of regular expressions which will be used to find files which
should be covered by the ctest_coverage() command.

It is initialized by ctest(1), but may be edited in a CTestCustom file.

CTEST_GIT_COMMAND
New in version 3.1.

Specify the CTest GITCommand setting in a ctest(1) dashboard client
script.

CTEST_GIT_INIT_SUBMODULES
New in version 3.6.

Specify the CTest GITInitSubmodules setting in a ctest(1) dashboard
client script.

CTEST_GIT_UPDATE_CUSTOM
New in version 3.1.

Specify the CTest GITUpdateCustom setting in a ctest(1) dashboard
client script.

CTEST_GIT_UPDATE_OPTIONS
New in version 3.1.

Specify the CTest GITUpdateOptions setting in a ctest(1) dashboard
client script.

CTEST_HG_COMMAND
New in version 3.1.

Specify the CTest HGCommand setting in a ctest(1) dashboard client
script.

CTEST_HG_UPDATE_OPTIONS
New in version 3.1.

Specify the CTest HGUpdateOptions setting in a ctest(1) dashboard
client script.

CTEST_LABELS_FOR_SUBPROJECTS
New in version 3.10.

Specify the CTest LabelsForSubprojects setting in a ctest(1) dashboard
client script.

CTEST_MEMORYCHECK_COMMAND
New in version 3.1.

Specify the CTest MemoryCheckCommand setting in a ctest(1) dashboard
client script.

CTEST_MEMORYCHECK_COMMAND_OPTIONS
New in version 3.1.

Specify the CTest MemoryCheckCommandOptions setting in a ctest(1)
dashboard client script.

CTEST_MEMORYCHECK_SANITIZER_OPTIONS
New in version 3.1.

Specify the CTest MemoryCheckSanitizerOptions setting in a ctest(1)
dashboard client script.

CTest prepends correct sanitizer options *_OPTIONS environment variable
to executed command. CTests adds its own log_path to sanitizer options,
don't provide your own log_path.

CTEST_MEMORYCHECK_SUPPRESSIONS_FILE
New in version 3.1.

Specify the CTest MemoryCheckSuppressionFile setting in a ctest(1)
dashboard client script.

CTEST_MEMORYCHECK_TYPE
New in version 3.1.

Specify the CTest MemoryCheckType setting in a ctest(1) dashboard
client script.  Valid values are Valgrind, Purify, BoundsChecker,
LeakSanitizer, MemorySanitizer and UndefinedBehaviorSanitizer.

CTEST_NIGHTLY_START_TIME
New in version 3.1.

Specify the CTest NightlyStartTime setting in a ctest(1) dashboard
client script.

Note that this variable must always be set for a nightly build in a
dashboard script. It is needed so that nightly builds can be properly
grouped together in CDash.

CTEST_P4_CLIENT
New in version 3.1.

Specify the CTest P4Client setting in a ctest(1) dashboard client
script.

CTEST_P4_COMMAND
New in version 3.1.

Specify the CTest P4Command setting in a ctest(1) dashboard client
script.

CTEST_P4_OPTIONS
New in version 3.1.

Specify the CTest P4Options setting in a ctest(1) dashboard client
script.

CTEST_P4_UPDATE_OPTIONS
New in version 3.1.

Specify the CTest P4UpdateOptions setting in a ctest(1) dashboard
client script.

CTEST_RESOURCE_SPEC_FILE
New in version 3.18.

Specify the CTest ResourceSpecFile setting in a ctest(1) dashboard
client script.

This can also be used to specify the resource spec file from a CMake
build. If no RESOURCE_SPEC_FILE is passed to ctest_test(), and
CTEST_RESOURCE_SPEC_FILE is not specified in the dashboard script, the
value of this variable from the build is used.

CTEST_RUN_CURRENT_SCRIPT
New in version 3.11.

Setting this to 0 prevents ctest(1) from being run again when it
reaches the end of a script run by calling ctest -S.

CTEST_SCP_COMMAND
New in version 3.1.

Legacy option.  Not used.

CTEST_SCRIPT_DIRECTORY
The directory containing the top-level CTest script.  The concept is
similar to CMAKE_SOURCE_DIR.

CTEST_SITE
New in version 3.1.

Specify the CTest Site setting in a ctest(1) dashboard client script.

CTEST_SUBMIT_INACTIVITY_TIMEOUT
New in version 3.23.

Specify the CTest SubmitInactivityTimeout setting in a ctest(1)
dashboard client script.

CTEST_SUBMIT_URL
New in version 3.14.

Specify the CTest SubmitURL setting in a ctest(1) dashboard client
script.

CTEST_SOURCE_DIRECTORY
New in version 3.1.

Specify the CTest SourceDirectory setting in a ctest(1) dashboard
client script.

CTEST_SVN_COMMAND
New in version 3.1.

Specify the CTest SVNCommand setting in a ctest(1) dashboard client
script.

CTEST_SVN_OPTIONS
New in version 3.1.

Specify the CTest SVNOptions setting in a ctest(1) dashboard client
script.

CTEST_SVN_UPDATE_OPTIONS
New in version 3.1.

Specify the CTest SVNUpdateOptions setting in a ctest(1) dashboard
client script.

New in version 3.4.

Specify the TestLoad setting in the CTest Test Step of a ctest(1)
dashboard client script.  This sets the default value for the TEST_LOAD
option of the ctest_test() command.

CTEST_TEST_TIMEOUT
New in version 3.1.

Specify the CTest TimeOut setting in a ctest(1) dashboard client
script.

CTEST_TRIGGER_SITE
New in version 3.1.

Legacy option.  Not used.

CTEST_UPDATE_COMMAND
New in version 3.1.

Specify the CTest UpdateCommand setting in a ctest(1) dashboard client
script.

CTEST_UPDATE_OPTIONS
New in version 3.1.

Specify the CTest UpdateOptions setting in a ctest(1) dashboard client
script.

CTEST_UPDATE_VERSION_ONLY
New in version 3.1.

Specify the CTest UpdateVersionOnly setting in a ctest(1) dashboard
client script.

CTEST_UPDATE_VERSION_OVERRIDE
New in version 3.15.

Specify the CTest UpdateVersionOverride setting in a ctest(1) dashboard
client script.

CTEST_USE_LAUNCHERS
New in version 3.1.

Specify the CTest UseLaunchers setting in a ctest(1) dashboard client
script.

VARIABLES FOR CPACK
CPACK_ABSOLUTE_DESTINATION_FILES
List of files which have been installed using an ABSOLUTE DESTINATION
path.

This variable is a Read-Only variable which is set internally by CPack
during installation and before packaging using
CMAKE_ABSOLUTE_DESTINATION_FILES defined in cmake_install.cmake
scripts.  The value can be used within CPack project configuration file
and/or CPack<GEN>.cmake file of <GEN> generator.

CPACK_COMPONENT_INCLUDE_TOPLEVEL_DIRECTORY
Boolean toggle to include/exclude top level directory (component case).

Similar usage as CPACK_INCLUDE_TOPLEVEL_DIRECTORY but for the component
case.  See CPACK_INCLUDE_TOPLEVEL_DIRECTORY documentation for the
detail.

CPACK_CUSTOM_INSTALL_VARIABLES
New in version 3.21.

CPack variables (set via e.g. cpack -D, CPackConfig.cmake or
CPACK_PROJECT_CONFIG_FILE scripts) are not directly visible in
installation scripts.  Instead, one can pass a list of varName=value
pairs in the CPACK_CUSTOM_INSTALL_VARIABLES variable.  At install time,
each list item will result in a variable of the specified name
(varName) being set to the given value.  The = can be omitted for an
empty value.

CPACK_CUSTOM_INSTALL_VARIABLES allows the packaging installation to be
influenced by the user or driving script at CPack runtime without
having to regenerate the install scripts.

Example

install(FILES large.txt DESTINATION data)

install(CODE [[
if(ENABLE_COMPRESSION)
# "run-compressor" is a fictional tool that produces
# large.txt.xz from large.txt and then removes the input file
execute_process(COMMAND run-compressor $ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/large.txt)
endif()
]])

With the above example snippet, cpack will by default run the
installation script with ENABLE_COMPRESSION unset, resulting in a
package containing the uncompressed large.txt.  This can be overridden
when invoking cpack like so:

cpack -D "CPACK_CUSTOM_INSTALL_VARIABLES=ENABLE_COMPRESSION=TRUE"

The installation script will then run with ENABLE_COMPRESSION set to
TRUE, resulting in a package containing the compressed large.txt.xz

CPACK_ERROR_ON_ABSOLUTE_INSTALL_DESTINATION
Ask CPack to error out as soon as a file with absolute INSTALL
DESTINATION is encountered.

The fatal error is emitted before the installation of the offending
file takes place.  Some CPack generators, like NSIS, enforce this
internally.  This variable triggers the definition of
CMAKE_ERROR_ON_ABSOLUTE_INSTALL_DESTINATION when CPack runs.

CPACK_INCLUDE_TOPLEVEL_DIRECTORY
Boolean toggle to include/exclude top level directory.

When preparing a package CPack installs the item under the so-called
top level directory.  The purpose of is to include (set to 1 or ON or
TRUE) the top level directory in the package or not (set to 0 or OFF or
FALSE).

Each CPack generator has a built-in default value for this variable.
E.g.  Archive generators (ZIP, TGZ, ...) includes the top level whereas
RPM or DEB don't.  The user may override the default value by setting
this variable.

There is a similar variable CPACK_COMPONENT_INCLUDE_TOPLEVEL_DIRECTORY
which may be used to override the behavior for the component packaging
case which may have different default value for historical (now
backward compatibility) reason.

CPACK_INSTALL_DEFAULT_DIRECTORY_PERMISSIONS
New in version 3.11.

Default permissions for implicitly created directories during
packaging.

This variable serves the same purpose during packaging as the
CMAKE_INSTALL_DEFAULT_DIRECTORY_PERMISSIONS variable serves during
installation (e.g. make install).

If include(CPack) is used then by default this variable is set to the
content of CMAKE_INSTALL_DEFAULT_DIRECTORY_PERMISSIONS.

CPACK_PACKAGING_INSTALL_PREFIX
The prefix used in the built package.

Each CPack generator has a default value (like /usr).  This default
value may be overwritten from the CMakeLists.txt or the cpack(1)
command line by setting an alternative value.  Example:

set(CPACK_PACKAGING_INSTALL_PREFIX "/opt")

This is not the same purpose as CMAKE_INSTALL_PREFIX which is used when
installing from the build tree without building a package.

CPACK_SET_DESTDIR
Boolean toggle to make CPack use DESTDIR mechanism when packaging.

DESTDIR means DESTination DIRectory.  It is commonly used by makefile
users in order to install software at non-default location.  It is a
basic relocation mechanism that should not be used on Windows (see
CMAKE_INSTALL_PREFIX documentation).  It is usually invoked like this:

make DESTDIR=/home/john install

which will install the concerned software using the installation
prefix, e.g. /usr/local prepended with the DESTDIR value which finally
gives /home/john/usr/local.  When preparing a package, CPack first
installs the items to be packaged in a local (to the build tree)
directory by using the same DESTDIR mechanism.  Nevertheless, if
CPACK_SET_DESTDIR is set then CPack will set DESTDIR before doing the
local install.  The most noticeable difference is that without
CPACK_SET_DESTDIR, CPack uses CPACK_PACKAGING_INSTALL_PREFIX as a
prefix whereas with CPACK_SET_DESTDIR set, CPack will use
CMAKE_INSTALL_PREFIX as a prefix.

Manually setting CPACK_SET_DESTDIR may help (or simply be necessary) if
some install rules uses absolute DESTINATION (see CMake install()
command).  However, starting with CPack/CMake 2.8.3 RPM and DEB
installers tries to handle DESTDIR automatically so that it is seldom
necessary for the user to set it.

CPACK_WARN_ON_ABSOLUTE_INSTALL_DESTINATION
Ask CPack to warn each time a file with absolute INSTALL DESTINATION is
encountered.

This variable triggers the definition of
CMAKE_WARN_ON_ABSOLUTE_INSTALL_DESTINATION when CPack runs
cmake_install.cmake scripts.

VARIABLE EXPANSION OPERATORS
CACHE
New in version 3.13.

Operator to read cache variables.

Use the syntax $CACHE{VAR} to read cache entry VAR. See the cmake-language(7) variables documentation for more complete documentation of the interaction of normal variables and cache entries. When evaluating Variable References of the form${VAR}, CMake first
searches for a normal variable with that name, and if not found CMake
will search for a cache entry with that name.  The $CACHE{VAR} syntax can be used to do direct cache lookup and ignore any existing normal variable. See the set() and unset() commands to see how to write or remove cache variables. ENV Operator to read environment variables. Use the syntax$ENV{VAR} to read environment variable VAR.

To test whether an environment variable is defined, use the signature
if(DEFINED ENV{<name>}) of the if() command.

For general information on environment variables, see the Environment
Variables section in the cmake-language(7) manual.

INTERNAL VARIABLES
CMake has many internal variables.  Most of them are undocumented.
Some of them, however, were at some point described as normal
variables, and therefore may be encountered in legacy code. They are
subject to change, and not recommended for use in project code.

CMAKE_HOME_DIRECTORY
Path to top of source tree. Same as CMAKE_SOURCE_DIR.

This is an internal cache entry used to locate the source directory
when loading a CMakeCache.txt from a build tree.  It should not be used
in project code.  The variable CMAKE_SOURCE_DIR has the same value and
should be preferred.

CMAKE_INTERNAL_PLATFORM_ABI
An internal variable subject to change.

This is used in determining the compiler ABI and is subject to change.

CMAKE_<LANG>_COMPILER_ABI
An internal variable subject to change.

This is used in determining the compiler ABI and is subject to change.

CMAKE_<LANG>_COMPILER_ARCHITECTURE_ID
New in version 3.10.

An internal variable subject to change.

This is used to identify the variant of a compiler based on its target
architecture.  For some compilers this is needed to determine the
correct usage.

CMAKE_<LANG>_COMPILER_VERSION_INTERNAL
New in version 3.10.

An internal variable subject to change.

This is used to identify the variant of a compiler based on an internal
version number.  For some compilers this is needed to determine the
correct usage.

An internal variable subject to change.

Preference value for linker language selection.

The "linker language" for executable, shared library, and module
targets is the language whose compiler will invoke the linker.  The
LINKER_LANGUAGE target property sets the language explicitly.
Otherwise, the linker language is that whose linker preference value is
highest among languages compiled and linked into the target.  See also

An internal variable subject to change.

True if CMAKE_<LANG>_LINKER_PREFERENCE propagates across targets.

This is used when CMake selects a linker language for a target.
Languages compiled directly into the target are always considered.  A
language compiled into static libraries linked by the target is
considered if this variable is true.

CMAKE_<LANG>_PLATFORM_ID
An internal variable subject to change.

This is used in determining the platform and is subject to change.

CMAKE_NOT_USING_CONFIG_FLAGS
Skip _BUILD_TYPE flags if true.

This is an internal flag used by the generators in CMake to tell CMake
to skip the _BUILD_TYPE flags.

CMAKE_VS_INTEL_Fortran_PROJECT_VERSION
When generating for Visual Studio 9 2008 or greater with the Intel
Fortran plugin installed, this specifies the .vfproj project file
format version.  This is intended for internal use by CMake and should
not be used by project code.