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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
17 hours ago Joseph MyersAdd _Float128 function aliases.master
18 hours ago Szabolcs Nagy[AARCH64] Rewrite elf_machine_load_address using _DYNAM...
20 hours ago Paul Clarkepowerpc: fix check-before-set in SET_RESTORE_ROUND
22 hours ago Mike FABIANUse U+202F NARROW NO-BREAK SPACE as thousands separator...
23 hours ago Wilco DijkstraFix build failure on tilepro due to unsupported atomics
38 hours ago Joseph MyersUse __f128 to define FLT128_* constants in include...
39 hours ago Adhemerval... posix: Add p{readv,writev}2 flags to generic uio-ext.h
41 hours ago Wilco DijkstraImprove malloc initialization sequence
41 hours ago Wilco DijkstraUse relaxed atomics for malloc have_fastchunks
41 hours ago Wilco DijkstraInline tcache functions
43 hours ago Adhemerval... Fix armv7-a compiler option name
43 hours ago Aurelien JarnoNew locale ca_ES@valencia [BZ #2522]
44 hours ago Romain NaourLet signbit use the builtin in C++ mode with gcc <...
44 hours ago Adhemerval... Add arm-linux-gnueabihf-v7{-disabl...
44 hours ago Adhemerval... Add common ifunc-init.h header
45 hours ago Mike FABIANPlace monetary symbol in el_GR and el_CY after the...
2 days ago glibc-2.26.9000 Open master branch for glibc 2...
2 days ago glibc-2.16.90 Open master branch for glibc 2...
2 days ago glibc-2.25.90 Open master branch for glibc 2...
2 days ago glibc-2.24.90 Open master branch for glibc 2...
2 days ago glibc-2.23.90 Open master branch for glibc 2...
2 days ago glibc-2.22.90 Open master branch for glibc 2...
2 days ago glibc-2.21.90 Open master branch for glibc 2...
2 days ago glibc-2.20.90 Open master branch for glibc 2...
2 days ago glibc-2.19.90 Open master branch for glibc 2...
2 days ago glibc-2.18.90 Open master branch for glibc 2...
2 days ago glibc-2.17.90 Open master branch for glibc 2...
2 days ago glibc-2.16-ports-before-merge Last change to the ports tree befor...
2 months ago glibc-2.26 FROM: Siddhesh Poyarekar <siddhesh...
8 months ago glibc-2.25 The GNU C Library ============...
14 months ago glibc-2.24 The GNU C Library ============...
20 months ago glibc-2.23 The GNU C Library ============...
2 hours ago release/2.26/master
17 hours ago master
26 hours ago hjl/x86/math
39 hours ago azanella/ifunc-c
3 days ago hjl/pie/static
3 days ago hjl/pr22298/master
6 days ago hjl/pr22284/2.26
7 days ago release/2.25/master
11 days ago release/2.24/master
2 weeks ago arm/ilp32
2 weeks ago azanella/memcpy-power8
2 weeks ago hjl/pr18822
2 weeks ago hjl/nsz/math
2 weeks ago nsz/math
3 weeks ago aaribaud/y2038-2.26-rfc-2
4 weeks ago hjl/cet/property
Cached version (6944s 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