DragonFly On-Line Manual Pages

Search: Section:  

INTRO(3)              DragonFly Library Functions Manual              INTRO(3)


NAME

     intro - introduction to the C libraries


DESCRIPTION

     This section provides an overview of the C library functions, their error
     returns and other common definitions and concepts.  Most of these
     functions are available from the C library, libc.  Other libraries, such
     as the math library, libm, must be indicated at compile time with the -l
     option of the compiler.

     The various libraries (followed by the loader flag):

     libc (-lc)                Standard C library functions.  When using the C
                               compiler cc(1), it is not necessary to supply
                               the loader flag -lc for these functions.  There
                               are several `libraries' or groups of functions
                               included inside of libc: the standard I/O
                               routines, database routines, bit operators,
                               string operators, character tests and character
                               operators, des encryption routines, storage
                               allocation, time functions, signal handling and
                               more.

     libcurses (-lcurses -ltermcap)
                               Terminal independent screen management routines
                               for two dimensional non-bitmap display
                               terminals.  (See ncurses(3).)

     libcompat (-lcompat)      Functions which are obsolete but are available
                               for compatibility with 4.3BSD.  In particular,
                               a number of system call interfaces provided in
                               previous releases of BSD have been included for
                               source code compatibility.  Use of these
                               routines should, for the most part, be avoided.
                               The manual page entry for each compatibility
                               routine indicates the proper interface to use.

     libkvm (-lkvm)            Functions used to access kernel memory are in
                               this library.  They can be used against both a
                               running system and a crash dump.  (See kvm(3).)

     libl (-ll)                The library for lex(1).

     libm (-lm)                The math library, libm.

     libmp (-lmp)

     libtermcap (-ltermcap)    The terminal independent operation library
                               package.  (See termcap(3).)

     liby (-ly)                The library for yacc(1).


FILES

     /usr/lib/libc.a          the C library
     /usr/lib/profile/libc.a  the C library compiled for profiling
     /usr/lib/libm.a          the math library
     /usr/lib/profile/libm.a  the math library compiled for profiling


SEE ALSO

     cc(1), ld(1), nm(1), intro(2), stdio(3)


HISTORY

     An intro manual appeared in Version 7 AT&T UNIX.

DragonFly 5.9-DEVELOPMENT       March 28, 2020       DragonFly 5.9-DEVELOPMENT

Search: Section: