1INTRO(3)                   Linux Programmer's Manual                  INTRO(3)
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NAME

6       intro - Introduction to library functions
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DESCRIPTION

9       Section  3  of the manual describes all library functions excluding the
10       library functions (system call wrappers) described in section 2,  which
11       implement system calls.
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13       Many of the functions described in the section are part of the Standard
14       C Library (libc).  Some functions are part of  other  libraries  (e.g.,
15       the  math library, libm, or the real-time library, librt) in which case
16       the manual page will indicate the linker option needed to link  against
17       the  required library (e.g., -lm and -lrt, respectively, for the afore‐
18       mentioned libraries).
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20       In some cases, the programmer must define a feature test macro in order
21       to  obtain the declaration of a function from the header file specified
22       in the man page SYNOPSIS section.  In such cases, the required macro is
23       described  in  the  man  page.  For further information on feature test
24       macros, see feature_test_macros(7).
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CONFORMING TO

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

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

37       intro(2), errno(3), feature_test_macros(7), libc(7), standards(7)
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COLOPHON

40       This  page  is  part of release 3.25 of the Linux man-pages project.  A
41       description of the project, and information about reporting  bugs,  can
42       be found at http://www.kernel.org/doc/man-pages/.
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46Linux                             2010-02-03                          INTRO(3)
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