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XkbLibraryVersion(3)             XKB FUNCTIONS            XkbLibraryVersion(3)

NAME
       XkbLibraryVersion -  Determines the compatibility of a library at
       runtime.

SYNOPSIS
       Bool XkbLibraryVersion (int *lib_major_in_out, int *lib_minor_in_out);

ARGUMENTS
       lib_major_in_out
              Specifies and returns the major Xkb library version.

       lib_minor_in_out
              Specifies and returns the minor Xkb library version.

DESCRIPTION
       If an application is dynamically linked, both the X server and the
       client-side X library must contain the Xkb extension in order for the
       client to use the Xkb extension capabilities. Therefore a dynamically
       linked application must check both the library and the server for
       compatibility before using Xkb function calls. A properly written
       program must check for compatibility between the version of the Xkb
       library that is dynamically loaded and the one used when the
       application was built. It must then check the server version for
       compatibility with the version of Xkb in the library.

       If your application is statically linked, you must still check for
       server compatibility and may check library compatibility. (It is
       possible to compile against one set of header files and link against a
       different, incompatible, version of the library, although this should
       not normally occur.)

       Pass the symbolic value XkbMajorVersion in lib_major_in_out and
       XkbMinorVersion in lib_minor_in_out.  These arguments represent the
       version of the library used at compile time. The XkbLibraryVersion
       function backfills the major and minor version numbers of the library
       used at run time in lib_major_in_out and lib_minor_in_out.  If the
       versions of the compile time and run time libraries are compatible,
       XkbLibraryVersion returns True, otherwise, it returns False.

       In addition, in order to use the Xkb extension, you must ensure that
       the extension is present in the server and that the server supports the
       version of the extension expected by the client. Use XkbQueryExtension
       to do this, as described in the next section.

RETURN VALUES
       True           The XkbLibraryVersion returns True if the versions of
                      the compile time and run time libraries are compatible.

       False          The XkbLibraryVersion returns False if the versions of
                      the compile time and run time libraries are not
                      compatible.

SEE ALSO
       XkbMajorVersion(3), XkbMinorVersion(3), XkbQueryExtension(3)

X Version 11                     libX11 1.8.6             XkbLibraryVersion(3)