Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages


home | help
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 op­
     tion 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 rou­
		 tines, database routines, bit operators, string operators,
		 character tests and character operators, des encryption rou­
		 tines, storage allocation, time functions, signal handling
		 and more.

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

		 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 UNIX 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 prop­
		 er interface to use.

		 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 re­
		 quires the -lm flag.  (See math(3).)


		 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.

4th Berkeley Distribution	 June 5, 1993				     1


Want to link to this manual page? Use this URL:

home | help