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-.\" Copyright (c) 2009 Linux Foundation, written by Michael Kerrisk
-.\" <mtk.manpages@gmail.com>
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.TH libc 7 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-libc \- overview of standard C libraries on Linux
-.SH DESCRIPTION
-The term \[lq]libc\[rq] is commonly used as a shorthand for
-the \[lq]standard C library\[rq]
-a library of standard functions that can be used by all C programs
-(and sometimes by programs in other languages).
-Because of some history
-(see below),
-use of the term \[lq]libc\[rq]
-to refer to the standard C library is somewhat ambiguous on Linux.
-.SS glibc
-By far the most widely used C library on Linux is the
-.UR http://www.gnu.org\:/software\:/libc/
-GNU C Library
-.UE ,
-often referred to as
-.IR glibc .
-This is the C library that is nowadays used in all
-major Linux distributions.
-It is also the C library whose details are documented
-in the relevant pages of the
-.I man-pages
-project
-(primarily in Section 3 of the manual).
-Documentation of glibc is also available in the glibc manual,
-available via the command
-.IR "info libc" .
-Release 1.0 of glibc was made in September 1992.
-(There were earlier 0.x releases.)
-The next major release of glibc was 2.0,
-at the beginning of 1997.
-.P
-The pathname
-.I /lib/libc.so.6
-(or something similar)
-is normally a symbolic link that
-points to the location of the glibc library,
-and executing this pathname will cause glibc to display
-various information about the version installed on your system.
-.SS Linux libc
-In the early to mid 1990s,
-there was for a while
-.IR "Linux libc" ,
-a fork of glibc 1.x created by Linux developers who felt that glibc
-development at the time was not sufficing for the needs of Linux.
-Often,
-this library was referred to (ambiguously) as just \[lq]libc\[rq].
-Linux libc released major versions 2, 3, 4, and 5,
-as well as many minor versions of those releases.
-Linux libc4 was the last version to use the a.out binary format,
-and the first version to provide (primitive) shared library support.
-Linux libc 5 was the first version to support the ELF binary format;
-this version used the shared library soname
-.IR libc.so.5 .
-For a while,
-Linux libc was the standard C library in many Linux distributions.
-.P
-However,
-notwithstanding the original motivations of the Linux libc effort,
-by the time glibc 2.0 was released
-(in 1997),
-it was clearly superior to Linux libc,
-and all major Linux distributions that had been using Linux libc
-soon switched back to glibc.
-To avoid any confusion with Linux libc versions,
-glibc 2.0 and later used the shared library soname
-.IR libc.so.6 .
-.P
-Since the switch from Linux libc to glibc 2.0 occurred long ago,
-.I man-pages
-no longer takes care to document Linux libc details.
-Nevertheless,
-the history is visible in vestiges of information
-about Linux libc that remain in a few manual pages,
-in particular,
-references to
-.I libc4
-and
-.IR libc5 .
-.SS Other C libraries
-There are various other less widely used C libraries for Linux.
-These libraries are generally smaller than glibc,
-both in terms of features and memory footprint,
-and often intended for building small binaries,
-perhaps targeted at development for embedded Linux systems.
-Among such libraries are
-.UR http://www\:.uclibc\:.org/
-.I uClibc
-.UE ,
-.UR http://www\:.fefe\:.de/\:dietlibc/
-.I dietlibc
-.UE ,
-and
-.UR http://www\:.musl\-libc\:.org/
-.I "musl libc"
-.UE .
-Details of these libraries are covered by the
-.I man-pages
-project,
-where they are known.
-.SH SEE ALSO
-.BR syscalls (2),
-.BR getauxval (3),
-.BR proc (5),
-.BR feature_test_macros (7),
-.BR man\-pages (7),
-.BR standards (7),
-.BR vdso (7)