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intro.3

INTRO

Section: Linux Programmer's Manual (3)
Updated: 2009-02-01
Index Return to Main Contents
 

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 Terms

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 3.21 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/.


 

Index

NAME
DESCRIPTION
CONFORMING TO
NOTES
Authors and Copyright Terms
SEE ALSO
COLOPHON

 

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