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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 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 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), math(3), stdio(3)

HISTORY

An intro manual appeared in Version 7 AT&T UNIX. DragonFly 3.7 May 29, 2010 DragonFly 3.7