1 This directory contains the sources of the GNU C Library.
2 See the file "version.h" for what release version you have.
4 The GNU C Library is the standard system C library for all GNU systems,
5 and is an important part of what makes up a GNU system. It provides the
6 system API for all programs written in C and C-compatible languages such
7 as C++ and Objective C; the runtime facilities of other programming
8 languages use the C library to access the underlying operating system.
10 In GNU/Linux systems, the C library works with the Linux kernel to
11 implement the operating system behavior seen by user applications.
12 In GNU/Hurd systems, it works with a microkernel and Hurd servers.
14 The GNU C Library implements much of the POSIX.1 functionality in the
15 GNU/Hurd system, using configurations i[4567]86-*-gnu and x86_64-gnu.
17 When working with Linux kernels, this version of the GNU C Library
18 requires Linux kernel version 3.2 or later.
20 Also note that the shared version of the libgcc_s library must be
21 installed for the pthread library to work correctly.
23 The GNU C Library supports these configurations for using Linux kernels:
32 x86_64-*-linux-gnu Can build either x86_64 or x32
33 loongarch64-*-linux-gnu Hardware floating point, LE only.
35 microblaze*-*-linux-gnu
39 powerpc-*-linux-gnu Hardware or software floating point, BE only.
40 powerpc64*-*-linux-gnu Big-endian and little-endian.
49 If you are interested in doing a port, please contact the glibc
50 maintainers; see https://www.gnu.org/software/libc/ for more
53 See the file INSTALL to find out how to configure, build, and install
54 the GNU C Library. You might also consider reading the WWW pages for
55 the C library at https://www.gnu.org/software/libc/.
57 The GNU C Library is (almost) completely documented by the Texinfo manual
58 found in the `manual/' subdirectory. The manual is still being updated
59 and contains some known errors and omissions; we regret that we do not
60 have the resources to work on the manual as much as we would like. For
61 corrections to the manual, please file a bug in the `manual' component,
62 following the bug-reporting instructions below. Please be sure to check
63 the manual in the current development sources to see if your problem has
64 already been corrected.
66 Please see https://www.gnu.org/software/libc/bugs.html for bug reporting
67 information. We are now using the Bugzilla system to track all bug reports.
68 This web page gives detailed information on how to report bugs properly.
70 The GNU C Library is free software. See the file COPYING.LIB for copying
71 conditions, and LICENSES for notices about a few contributions that require
72 these additional notices to be distributed. License copyright years may be
73 listed using range notation, e.g., 1996-2015, indicating that every year in
74 the range, inclusive, is a copyrightable year that would otherwise be listed