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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 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
2 hours ago Samuel Thibaulthurd: Make mmap64 use vm_offset_t for overflow checkmaster
3 hours ago Thomas Schwingehurd: install correct number of send rights on fork
32 hours ago Maciej W. RozyckiMIPS: Wire FCSR.ABS2008 to FCSR.NAN2008
2 days ago Carlos O'DonellRename localedir to complocaledir (bug 14259).
2 days ago Andrew SenkevichBetter workaround for aliases of *_finite symbols in...
4 days ago Samuel Thibaulthurd: Initialize __libc_stack_end for hidden support
4 days ago Samuel ThibaultDo not add relro attribute to __libc_stack_end
4 days ago Samuel ThibaultRevert not defining NO_HIDDEN on hurd
4 days ago Samuel ThibaultFix hurd build with hidden support
4 days ago Samuel ThibaultFix RPC breakage when longjumping from signal handler
4 days ago Joseph MyersRefactor strtod parsing of NaN payloads.
4 days ago Joseph MyersFix strtod ("NAN(I)") in Turkish locales (bug 19266).
5 days ago Chris Metcalfmisc/tst-tsearch.c: bump up TIMEOUT to 10 seconds.
5 days ago Chris Metcalftile: define __NO_LONG_DOUBLE_MATH
5 days ago Gleb Fotengauer... malloc: remove redundant getenv call
5 days ago Florian WeimerRemove CPU set size checking from affinity functions...
3 months ago glibc-2.22 The GNU C Library ============...
9 months ago glibc-2.21 The GNU C Library ============...
14 months ago glibc-2.20 The GNU C Library ============...
21 months ago glibc-2.19 The GNU C Library ============...
2 years ago glibc-2.18 The GNU C Library ============...
2 years ago glibc-2.17 The GNU C Library ============...
3 years ago glibc-2.16-ports-merge libc and ports repositories merged...
3 years ago glibc-2.16.0 The GNU C Library ============...
3 years ago glibc-2.16 The GNU C Library ============...
3 years ago glibc-2.16-tps Translation project snapshot for...
3 years ago glibc-2.15 glibc 2.15 release
4 years ago glibc-2.14.1 glibc 2.14.1 release
4 years ago glibc-2.14 Tag 2.14 release
4 years ago glibc-2.13 glibc 2.13 release.
4 years ago glibc-2.12.2 glibc 2.12.2 release
5 years ago glibc-2.11.3 glibc-2.11.3 release
2 hours ago master
2 days ago release/2.22/master
3 days ago ibm/2.19/master
5 days ago release/2.19/master
7 days ago release/2.21/master
2 weeks ago hjl/pr19178/master
5 weeks ago ibm/2.22/master
5 weeks ago hjl/pr19122
5 weeks ago hjl/i386/master
6 weeks ago gentoo/2.22
6 weeks ago azanella/bz12683
2 months ago hjl/secondary/master
2 months ago hjl/pthread/2.22
2 months ago carlos/dlmopen
2 months ago hjl/pthread/2.21
2 months ago siddhesh/tunables
Cached version (5534s old)
 NaCl   glibc 
glibc/pb-stable.git Petr Baudis' queue of bugfixes... 5 years ago
glibc/nacl-glibc.git Port of glibc to Google Native... 5 years ago
glibc/history.git Unaltered CVS history 6 years ago