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@(#)intro.3 8.1 (Berkeley) 6/5/93
$FreeBSD: src/share/man/man3/intro.3,v 1.14 2001/08/07 15:48:38 ru Exp $
.Dd Aug 17, 2006 .Dt INTRO 3 .Os .Sh NAME .Nm intro .Nd introduction to the C libraries .Sh 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 System library, .Em libSystem . Other libraries must be indicated at compile time with the .Fl l option of the compiler.
p The various libraries (followed by the loader flag): l -tag -width "libSystem (-lSystem)" t Xr libSystem Pq Fl l Ns Ar System Standard C library functions. When using the C compiler .Xr cc 1 , it is not necessary to supply the loader flag .Fl l Ns Ar System for these functions. There are several `libraries' or groups of functions included inside of .Xr libSystem : the standard .Tn 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.
p
For compatibility with other systems, which provide these capabilities in
separate libraries (such as
.Xr libc ) ,
symbolic links are provided for
.Fl l Ns Ar c ,
.Fl l Ns Ar dbm ,
.Fl l Ns Ar dl ,
.Fl l Ns Ar info ,
.Fl l Ns Ar m ,
.Fl l Ns Ar poll ,
.Fl l Ns Ar pthread
and
.Fl l Ns Ar rpcsvc ;
they all point to
.Xr libSystem .
t Xr libcurses Pq Fl l Ns Ar curses Fl l Ns Ar termcap Terminal independent screen management routines
for two dimensional non-bitmap display terminals.
(See
.Xr ncurses 3 . )
t Xr libl Pq Fl l Ns Ar l The library for
.Xr lex 1 .
t Xr libtermcap Pq Fl l Ns Ar termcap The terminal independent operation library package.
(See
.Xr termcap 3 . )
.It libvt0.a
t Xr liby Pq Fl l Ns Ar y The library for
.Xr yacc 1 .
.El
.Sh FILES
l -tag -width /usr/lib/libSystem_profile.dylib -compact t Pa /usr/lib/libSystem.dylib the main System library
t Pa /usr/lib/libSystem_debug.dylib the main System library compiled with debug support
t Pa /usr/lib/libSystem_profile.dylib the main System library compiled for profiling
.El
.Sh SEE ALSO
.Xr libc 3 ,
.Xr cc 1 ,
.Xr ld 1 ,
.Xr nm 1 ,
.Xr intro 2 ,
.Xr stdio 3
.Sh LIST OF FUNCTIONS
.Bl -column "strncasecmpxxx" "system"
.Sy Name Description
.El
.Sh HISTORY
An
.Nm
manual appeared in
.At v7 .