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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
14 hours ago DJ DelorieUpdate nss tests to new skeletonmaster
16 hours ago Adhemerval... Consolidate non cancellable open call
21 hours ago Wilco DijkstraAdd math benchmark latency test
24 hours ago H.J. LuSupport mcount/gprof test with GCC defaulting to PIE
27 hours ago Akhilesh KumarFix abmon for bem_ZM
27 hours ago Akhilesh KumarFix country name for xh_ZA
27 hours ago Thorsten GlaserRefresh generated charmap data and ChangeLog
27 hours ago Thorsten GlaserResolve some historically special cases of ambiguous...
27 hours ago Thorsten GlaserHandle more cases of combining characters
27 hours ago Thorsten GlaserUnicodeData has precedence over EastAsianWidth
28 hours ago Florian Weimer__opensock: Remove internal_function attribute
40 hours ago Joseph MyersFix sigval namespace (bug 21944).
42 hours ago H.J. LuRemove "[Add new features here]" for 2.27
43 hours ago Joseph MyersAllow abort PLT references in for SH.
44 hours ago H.J. LuMention x86-64 FMA optimization in NEWS
45 hours ago H.J. Lux86-64: Optimize e_expf with FMA [BZ #21912]
2 weeks ago glibc-2.26 FROM: Siddhesh Poyarekar <siddhesh...
6 months ago glibc-2.25 The GNU C Library ============...
12 months ago glibc-2.24 The GNU C Library ============...
17 months ago glibc-2.23 The GNU C Library ============...
2 years 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 ============...
4 years ago glibc-2.18 The GNU C Library ============...
4 years ago glibc-2.17 The GNU C Library ============...
5 years ago glibc-2.16-ports-merge libc and ports repositories merged...
5 years ago glibc-2.16.0 The GNU C Library ============...
5 years ago glibc-2.16 The GNU C Library ============...
5 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
14 hours ago master
42 hours ago hjl/pie/static
42 hours ago hjl/pie/hidden
45 hours ago hjl/fma/2.26
45 hours ago hjl/expf/master
2 days ago hjl/cet/property
3 days ago fw/tst-gmon
3 days ago release/2.25/master
4 days ago hjl/pr21864/master
6 days ago release/2.26/master
10 days ago hjl/pr21913/master
10 days ago hjl/fma/master
11 days ago release/2.24/master
13 days ago hjl/xgetbv/2.25
2 weeks ago ibm/2.26/master
2 weeks ago hjl/ifunc/x86
Cached version (223s 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