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1 | This directory contains the sources of the GNU C Library. |
2 | See the file "version.h" for what release version you have. | |
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3 | |
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. | |
9 | ||
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. | |
13 | ||
3858bf28 | 14 | The GNU C Library implements much of the POSIX.1 functionality in the |
a01f19c8 | 15 | GNU/Hurd system, using configurations i[4567]86-*-gnu. The current |
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16 | GNU/Hurd support requires out-of-tree patches that will eventually be |
17 | incorporated into an official GNU C Library release. | |
3858bf28 | 18 | |
7aab07e4 | 19 | When working with Linux kernels, this version of the GNU C Library |
139ace95 | 20 | requires Linux kernel version 3.2 or later. |
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22 | Also note that the shared version of the libgcc_s library must be |
23 | installed for the pthread library to work correctly. | |
24 | ||
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25 | The GNU C Library supports these configurations for using Linux kernels: |
26 | ||
75eff3fe | 27 | aarch64*-*-linux-gnu |
68b7efaa | 28 | alpha*-*-linux-gnu |
c6bfe5c4 | 29 | arm-*-linux-gnueabi |
caaf7804 | 30 | hppa-*-linux-gnu |
adae8f5e | 31 | i[4567]86-*-linux-gnu |
ee9247c3 | 32 | x86_64-*-linux-gnu Can build either x86_64 or x32 |
c70a4b1d | 33 | ia64-*-linux-gnu |
73588a72 | 34 | m68k-*-linux-gnu |
ef114eaf | 35 | microblaze*-*-linux-gnu |
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36 | mips-*-linux-gnu |
37 | mips64-*-linux-gnu | |
9ec1b13d | 38 | powerpc-*-linux-gnu Hardware or software floating point, BE only. |
8b7d57cd | 39 | powerpc64*-*-linux-gnu Big-endian and little-endian. |
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40 | s390-*-linux-gnu |
41 | s390x-*-linux-gnu | |
40ca951b | 42 | riscv64-*-linux-gnu |
6dad2c06 | 43 | sh[34]-*-linux-gnu |
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44 | sparc*-*-linux-gnu |
45 | sparc64*-*-linux-gnu | |
4372980f | 46 | tilegx-*-linux-gnu |
3858bf28 | 47 | |
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48 | If you are interested in doing a port, please contact the glibc |
49 | maintainers; see http://www.gnu.org/software/libc/ for more | |
50 | information. | |
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51 | |
52 | See the file INSTALL to find out how to configure, build, and install | |
53 | the GNU C Library. You might also consider reading the WWW pages for | |
54 | the C library at http://www.gnu.org/software/libc/. | |
55 | ||
56 | The GNU C Library is (almost) completely documented by the Texinfo manual | |
57 | found in the `manual/' subdirectory. The manual is still being updated | |
58 | and contains some known errors and omissions; we regret that we do not | |
59 | have the resources to work on the manual as much as we would like. For | |
60 | corrections to the manual, please file a bug in the `manual' component, | |
61 | following the bug-reporting instructions below. Please be sure to check | |
62 | the manual in the current development sources to see if your problem has | |
63 | already been corrected. | |
28f540f4 | 64 | |
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65 | Please see http://www.gnu.org/software/libc/bugs.html for bug reporting |
66 | information. We are now using the Bugzilla system to track all bug reports. | |
67 | This web page gives detailed information on how to report bugs properly. | |
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68 | |
69 | The GNU C Library is free software. See the file COPYING.LIB for copying | |
c6c6dd48 | 70 | conditions, and LICENSES for notices about a few contributions that require |
627145fd | 71 | these additional notices to be distributed. License copyright years may be |
ef0ffcfd | 72 | listed using range notation, e.g., 1996-2015, indicating that every year in |
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73 | the range, inclusive, is a copyrightable year that would otherwise be listed |
74 | individually. |