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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
3 hours ago Rafal LuzynskiChangeLog: Fix an entry for [BZ #22657]master
3 hours ago Rafal Luzynskilocales bho_NP, mai_IN, mai_NP: Fix an obvious typo...
6 hours ago Dmitry V. LevinUpdate translations from the Translation Project
14 hours ago Joseph MyersFix backtrace for hppa (bug 22719).
15 hours ago H.J. Lux86-64: Properly align La_x86_64_retval to VEC_SIZE...
31 hours ago Joseph MyersUse LIBGCC_S_SO in x86_64 backtrace.
31 hours ago Florian Weimernptl/tst-thread-exit-clobber: Run with any C++ compiler
33 hours ago Szabolcs Nagyaarch64: Update bits/hwcap.h for Linux 4.15.
33 hours ago Szabolcs Nagyaarch64: make HWCAP updates less error prone
45 hours ago Florian Weimernptl/tst-minstack-throw: Compile in C++11 mode with...
2 days ago Alan HaywardAdd NT_ARM_SVE to elf.h
2 days ago Florian Weimernptl: Add PTHREAD_MIN_STACK C++ throw test [BZ #22636]
2 days ago Joseph MyersUpdate binutils, mpfr, mpc versions.
3 days ago Carlos O'DonellSynchronize DF_1_* flags with binutils (Bug 22707)
5 days ago Tulio Magno... powerpc: Fix llround spurious inexact on 32-bit POWER4...
5 days ago Dmitry V. LevinUpdate translations from the Translation Project
3 months ago glibc-2.26.9000 Open master branch for glibc 2...
3 months ago glibc-2.16.90 Open master branch for glibc 2...
3 months ago glibc-2.25.90 Open master branch for glibc 2...
3 months ago glibc-2.24.90 Open master branch for glibc 2...
3 months ago glibc-2.23.90 Open master branch for glibc 2...
3 months ago glibc-2.22.90 Open master branch for glibc 2...
3 months ago glibc-2.21.90 Open master branch for glibc 2...
3 months ago glibc-2.20.90 Open master branch for glibc 2...
3 months ago glibc-2.19.90 Open master branch for glibc 2...
3 months ago glibc-2.18.90 Open master branch for glibc 2...
3 months ago glibc-2.17.90 Open master branch for glibc 2...
3 months ago glibc-2.16-ports-before-merge Last change to the ports tree befor...
5 months ago glibc-2.26 FROM: Siddhesh Poyarekar <siddhesh...
11 months ago glibc-2.25 The GNU C Library ============...
17 months ago glibc-2.24 The GNU C Library ============...
22 months ago glibc-2.23 The GNU C Library ============...
3 hours ago master
8 hours ago azanella/qsort-refactor
13 hours ago hjl/pr22715/2.24
15 hours ago hjl/pr22715/2.25
15 hours ago hjl/pr22715/2.26
16 hours ago azanella/aarch64-split-stack
18 hours ago release/2.25/master
18 hours ago release/2.26/master
40 hours ago hjl/pr22715/master
2 days ago azanella/generic-strings
6 days ago release/2.23/master
8 days ago hjl/cet/master
9 days ago hjl/x86/sincosf
2 weeks ago release/2.24/master
3 weeks ago zack/libio-minimization
4 weeks ago ibm/2.24/master
Cached version (1294s old)
 NaCl   glibc 
glibc/pb-stable.git Petr Baudis' queue of bugfixes for stable... 7 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