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INTRO(3)               FreeBSD 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 (see libc(3)).  Other
     libraries, such as the math library, libm, must be indicated at compile
     time with the -l option of the compiler.

     A subset of the libc(functions) are available from Fortran; they are
     described separately in intro(3f).

     The various libraries (followed by the loader flag):

     libc (-lc)  Standard C library functions. (See libc(3).) 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 curses(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.

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

     libm (-lm)  The math library, libm.  The math library is loaded as needed
                 by the Pascal compiler pc(1), but not by the C compiler which
                 requires the -lm flag.  (See math(3).)

     libmp (-lmp)

     libplot (-lplot)
                 Device independent plotting functions.  (See plot(3).)

     libplotf77 (-lplotf77)
                 The device independent plotting functions for fortran.  (See
                 plot(3).)

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

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

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

BSD 4                            July 31, 1991                           BSD 4

NAME | DESCRIPTION | FILES | SEE ALSO | HISTORY

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