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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.

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
10 hours ago Andreas Schwabm68k: handle default PIEmaster
3 days ago H.J. LuAdd memchr tests for n == 0
3 days ago Tulio Magno... Move tst-mutex*8* to tests-internal
4 days ago H.J. LuMake __tunables_init hidden and avoid PLT
4 days ago H.J. LuSupport dl-tunables.list in subdirectories
4 days ago Paul E. Murphyfloat128: Add wrappers to override ldbl-128 as float128.
4 days ago Steve Ellceyaarch64: Thunderx specific memcpy and memmove
5 days ago Siddhesh Poyarekararm: Fix typo in array count
5 days ago H.J. Lux86: Don't include cacheinfo.c in
5 days ago H.J. Lux86: Use __get_cpu_features to get cpu_features
6 days ago Joseph MyersFix sigstack namespace (bug 21511).
6 days ago Joseph MyersFix sys/ucontext.h namespace from signal.h etc. inclusi...
6 days ago Zack WeinbergFix a bug in 'Remove __need macros from signal.h' ...
6 days ago Adhemerval... libio: Avoid dup already opened file descriptor [BZ...
6 days ago Siddhesh PoyarekarRemove useless comment from sysdeps/sparc/sparc32/dl...
8 days ago Zack WeinbergAdd one more header to be installed, missed from previo...
3 months ago glibc-2.25 The GNU C Library ============...
9 months ago glibc-2.24 The GNU C Library ============...
15 months ago glibc-2.23 The GNU C Library ============...
21 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
6 years ago glibc-2.14 Tag 2.14 release
3 hours ago hjl/master
10 hours ago master
43 hours ago hjl/tunables/master
2 days ago ibm/2.24/master
3 days ago tuliom/float128
5 days ago hjl/cacheinfo/master
5 days ago aaribaud/y2038-2.23
5 days ago aaribaud/y2038-2.25
7 days ago hjl/wcslen/master
8 days ago zack/no-inline-string-opts
8 days ago zack/no-libio-h
8 days ago zack/headers-cleanups
9 days ago hjl/x86/optimize
2 weeks ago dj/malloc-tcache
4 weeks ago release/2.25/master
4 weeks ago fw/syscall-list
Cached version (3212s 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) 7 years ago
glibc/history.git Unaltered CVS history 8 years ago