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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
       aforementioned 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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