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INTRO(3)		   Linux Programmer's Manual		      INTRO(3)

NAME
       intro - Introduction to library functions

DESCRIPTION
       Section	3  of the manual describes all library functions excluding the
       library functions (system call wrappers)	described in section 2,	 which
       implement system	calls.

       Many of the functions described in the section are part of the Standard
       C Library (libc).  Some functions are part of  other  libraries	(e.g.,
       the  math library, libm,	or the real-time library, librt) in which case
       the manual page will indicate the linker	option needed to link  against
       the  required library (e.g., -lm	and -lrt, respectively,	for the	afore-
       mentioned libraries).

       In some cases, the programmer must define a feature test	macro in order
       to  obtain the declaration of a function	from the header	file specified
       in the man page SYNOPSIS	section.  In such cases, the required macro is
       described  in  the  man	page.  For further information on feature test
       macros, see feature_test_macros(7).

CONFORMING TO
       Certain terms and abbreviations are used	to indicate Unix variants  and
       standards to which calls	in this	section	conform.  See standards(7).

NOTES
   Authors and Copyright Conditions
       Look  at	 the  header  of  the manual page source for the author(s) and
       copyright conditions.  Note that	these can be different	from  page  to
       page!

SEE ALSO
       intro(2), errno(3), feature_test_macros(7), libc(7), standards(7)

COLOPHON
       This  page  is  part of release 3.25 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found	at http://www.kernel.org/doc/man-pages/.

Linux				  2010-02-03			      INTRO(3)

NAME | DESCRIPTION | CONFORMING TO | NOTES | SEE ALSO | COLOPHON

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