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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
4 hours ago Gabriel F.... Remove conditional on LDBL_MANT_DIG from e_lgammal_r.cmaster
4 hours ago Gabriel F.... ldbl-128ibm: Automatic replacing of _Float128 and L()
4 hours ago Gabriel F.... ldbl-128ibm: Copy implementations from ldbl-128 instead...
4 hours ago Gabriel F.... powerpc: Add redirection for finitef128, isinf128,...
4 hours ago Gabriel F.... powerpc64le: Add -mfloat128 to tst-strtod-nan-locale...
5 hours ago Paul PluzhnikovFix BZ# 22180.
7 hours ago Joseph MyersRemove non-add-on Banner files.
22 hours ago Paul PluzhnikovImplement xdlopen, xdlsym and xdlclose routines which...
32 hours ago Joseph MyersAdd SSE4.1 trunc, truncf (bug 20142).
32 hours ago Paul PluzhnikovOops. stdlib/test-atexit-race-common.c should have...
32 hours ago Paul PluzhnikovFix BZ 14333
39 hours ago Szabolcs NagyAdd exp2f and log2f benchmark trace
2 days ago Joseph MyersFix fexecve build where syscall macros call sizeof.
2 days ago Andreas SchwabUse execveat syscall in fexecve (bug 22134)
2 days ago Wilco DijkstraAdd logf trace
2 days ago Wilco DijkstraAdd expf trace
7 weeks ago glibc-2.26 FROM: Siddhesh Poyarekar <siddhesh...
7 months ago glibc-2.25 The GNU C Library ============...
13 months ago glibc-2.24 The GNU C Library ============...
19 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 ============...
3 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
4 hours ago master
39 hours ago nsz/math
2 days ago azanella/memopt-power8
2 days ago release/2.26/master
6 days ago hjl/cet/property
9 days ago hjl/pie/static
10 days ago release/2.25/master
2 weeks ago hjl/pr18822
2 weeks ago arm/ilp32
3 weeks ago hjl/pr22053/master
3 weeks ago hjl/pr22051/master
3 weeks ago hjl/fma/master
3 weeks ago hjl/pr21967/master
4 weeks ago zack/dont-install-libio-h
4 weeks ago zack/anon-unions
4 weeks ago hjl/gmp
Cached version (4480s 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