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. (Where required, these
feature test macros must be defined before including any header
files.) 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), capabilities(7), credentials(7), environ(7),
feature_test_macros(7), libc(7), math_error(7), path_resolution(7),
pthreads(7), signal(7), standards(7)
COLOPHON
This page is part of release 3.77 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
http://www.kernel.org/doc/man-pages/.
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