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This directory contains the sources of the GNU C Library.
See the file "version.h" for what release version you have.

The GNU C Library is the standard system C library for all GNU systems,
and is an important part of what makes up a GNU system.  It provides the
system API for all programs written in C and C-compatible languages such
as C++ and Objective C; the runtime facilities of other programming
languages use the C library to access the underlying operating system.

In GNU/Linux systems, the C library works with the Linux kernel to
implement the operating system behavior seen by user applications.
In GNU/Hurd systems, it works with a microkernel and Hurd servers.

The GNU C Library implements much of the POSIX.1 functionality in the
GNU/Hurd system, using configurations i[4567]86-*-gnu.  The current
GNU/Hurd support requires out-of-tree patches that will eventually be
incorporated into an official GNU C Library release.

When working with Linux kernels, this version of the GNU C Library
requires Linux kernel version 3.2 or later on all architectures except
i[4567]86 and x86_64, where Linux kernel version 2.6.32 or later

Also note that the shared version of the libgcc_s library must be
installed for the pthread library to work correctly.

The GNU C Library supports these configurations for using Linux kernels:

	hppa-*-linux-gnu	Not currently functional without patches.
	x86_64-*-linux-gnu	Can build either x86_64 or x32
	powerpc-*-linux-gnu	Hardware or software floating point, BE only.
	powerpc64*-*-linux-gnu	Big-endian and little-endian.

If you are interested in doing a port, please contact the glibc
maintainers; see for more

See the file INSTALL to find out how to configure, build, and install
the GNU C Library.  You might also consider reading the WWW pages for
the C library at

The GNU C Library is (almost) completely documented by the Texinfo manual
found in the `manual/' subdirectory.  The manual is still being updated
and contains some known errors and omissions; we regret that we do not
have the resources to work on the manual as much as we would like.  For
corrections to the manual, please file a bug in the `manual' component,
following the bug-reporting instructions below.  Please be sure to check
the manual in the current development sources to see if your problem has
already been corrected.

Please see for bug reporting
information.  We are now using the Bugzilla system to track all bug reports.
This web page gives detailed information on how to report bugs properly.

The GNU C Library is free software.  See the file COPYING.LIB for copying
conditions, and LICENSES for notices about a few contributions that require
these additional notices to be distributed.  License copyright years may be
listed using range notation, e.g., 1996-2015, indicating that every year in
the range, inclusive, is a copyrightable year that would otherwise be listed
7 hours ago Wilco DijkstraAdd a new randomized memcpy test for copies up to 256... master
7 hours ago Tulio Magno... Change the order of function attributes in printf.h
11 hours ago Wainer dos... Update string tests to use the support test driver.
37 hours ago Zack WeinbergAnother round of inclusion fixes for _ISOMAC testsuite.
2 days ago H.J. Lux86-64: Improve branch predication in _dl_runtime_resol...
2 days ago Joseph MyersRegenerate INSTALL.
2 days ago Thorsten KukukMerge branch 'master' of ssh://
2 days ago Stefan LieblerFix failing test malloc/tst-interpose-nothread with...
2 days ago Thorsten KukukDeprecate libnsl by default (only shared library will be
3 days ago Joseph Myersconformtest: Add x32 XFAILs for mq_attr element types...
3 days ago Joseph Myersconformtest: Add mips XFAIL for struct stat st_rdev...
3 days ago Joseph MyersFix alpha termios.h NL2, NL3 namespace (bug 21268).
3 days ago Mike Frysingerposix_spawn: fix stack setup on ia64 [BZ #21275]
4 days ago Christian Braunerlinux ttyname and ttyname_r: do not return wrong results
6 days ago Joseph Myersconformtest: XFAIL tv_nsec tests for x32 (bug 16437).
6 days ago Joseph MyersFix sparc64 bits/setjmp.h namespace (bug 21261).
6 weeks ago glibc-2.25 The GNU C Library ============...
7 months ago glibc-2.24 The GNU C Library ============...
13 months ago glibc-2.23 The GNU C Library ============...
19 months ago glibc-2.22 The GNU C Library ============...
2 years ago glibc-2.21 The GNU C Library ============...
2 years ago glibc-2.20 The GNU C Library ============...
3 years ago glibc-2.19 The GNU C Library ============...
3 years ago glibc-2.18 The GNU C Library ============...
4 years ago glibc-2.17 The GNU C Library ============...
4 years ago glibc-2.16-ports-merge libc and ports repositories merged...
4 years ago glibc-2.16.0 The GNU C Library ============...
4 years ago glibc-2.16 The GNU C Library ============...
4 years ago glibc-2.16-tps Translation project snapshot for...
5 years ago glibc-2.15 glibc 2.15 release
5 years ago glibc-2.14.1 glibc 2.14.1 release
5 years ago glibc-2.14 Tag 2.14 release
7 hours ago master
35 hours ago zack/headers-cleanups
37 hours ago zack/testsuite-isomac
3 days ago gentoo/2.25
3 days ago gentoo/2.24
3 days ago release/2.25/master
3 days ago release/2.24/master
13 days ago fw/out_buffer
13 days ago dj/malloc-tcache
2 weeks ago fw/bug16145
4 weeks ago aaribaud/y2038-pre-5th-draft
4 weeks ago aaribaud/y2038
4 weeks ago release/2.19/master
4 weeks ago fw/math-split-tests
5 weeks ago tuliom/float128
6 weeks ago azanella/bz12683
Cached version (5261s old)
 NaCl   glibc 
glibc/pb-stable.git Petr Baudis' queue of bugfixes for stable... 6 years ago
glibc/nacl-glibc.git Port of glibc to Google Native Client (NaCl) 6 years ago
glibc/history.git Unaltered CVS history 7 years ago