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INTRO(3)               FreeBSD Library Functions Manual               INTRO(3)

     intro -- introduction to the C libraries

     This section provides an overview of the C library functions, their error
     returns and other common definitions and concepts.  Most of these func-
     tions 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, stor-
                 age 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 compati-
                 bility 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 rou-
                 tines 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.  The math library is loaded as needed
                 by the Pascal compiler, but not by the C compiler which
                 requires the -lm flag.  (See math(3).)

     libmp (-lmp)

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

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

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

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

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

FreeBSD 4.10                     June 5, 1993                     FreeBSD 4.10


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