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lh9ed821d2023-04-07 01:36:19 -07001This directory contains the sources of the GNU C Library.
2See the file "version.h" for what release version you have.
3
4The GNU C Library is the standard system C library for all GNU systems,
5and is an important part of what makes up a GNU system. It provides the
6system API for all programs written in C and C-compatible languages such
7as C++ and Objective C; the runtime facilities of other programming
8languages use the C library to access the underlying operating system.
9
10In GNU/Linux systems, the C library works with the Linux kernel to
11implement the operating system behavior seen by user applications.
12In GNU/Hurd systems, it works with a microkernel and Hurd servers.
13
14The GNU C Library implements much of the POSIX.1 functionality in the
15GNU/Hurd system, using configurations i[4567]86-*-gnu. The current
16GNU/Hurd support requires out-of-tree patches that will eventually be
17incorporated into an official GNU C Library release.
18
19When working with Linux kernels, this version of the GNU C Library
20requires Linux kernel version 2.6.32 or later.
21
22Also note that the shared version of the libgcc_s library must be
23installed for the pthread library to work correctly.
24
25The GNU C Library supports these configurations for using Linux kernels:
26
27 aarch64*-*-linux-gnu
28 alpha*-*-linux-gnu
29 arm-*-linux-gnueabi
30 hppa-*-linux-gnu Not currently functional without patches.
31 i[4567]86-*-linux-gnu
32 x86_64-*-linux-gnu Can build either x86_64 or x32
33 ia64-*-linux-gnu
34 m68k-*-linux-gnu
35 microblaze*-*-linux-gnu
36 mips-*-linux-gnu
37 mips64-*-linux-gnu
38 powerpc-*-linux-gnu Hardware or software floating point, BE only.
39 powerpc64*-*-linux-gnu Big-endian and little-endian.
40 s390-*-linux-gnu
41 s390x-*-linux-gnu
42 sh[34]-*-linux-gnu
43 sparc*-*-linux-gnu
44 sparc64*-*-linux-gnu
45 tilegx-*-linux-gnu
46 tilepro-*-linux-gnu
47
48If you are interested in doing a port, please contact the glibc
49maintainers; see http://www.gnu.org/software/libc/ for more
50information.
51
52See the file INSTALL to find out how to configure, build, and install
53the GNU C Library. You might also consider reading the WWW pages for
54the C library at http://www.gnu.org/software/libc/.
55
56The GNU C Library is (almost) completely documented by the Texinfo manual
57found in the `manual/' subdirectory. The manual is still being updated
58and contains some known errors and omissions; we regret that we do not
59have the resources to work on the manual as much as we would like. For
60corrections to the manual, please file a bug in the `manual' component,
61following the bug-reporting instructions below. Please be sure to check
62the manual in the current development sources to see if your problem has
63already been corrected.
64
65Please see http://www.gnu.org/software/libc/bugs.html for bug reporting
66information. We are now using the Bugzilla system to track all bug reports.
67This web page gives detailed information on how to report bugs properly.
68
69The GNU C Library is free software. See the file COPYING.LIB for copying
70conditions, and LICENSES for notices about a few contributions that require
71these additional notices to be distributed. License copyright years may be
72listed using range notation, e.g., 1996-2015, indicating that every year in
73the range, inclusive, is a copyrightable year that would otherwise be listed
74individually.