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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 |
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20 | requires Linux kernel version 3.2 or later on all architectures except |
21 | i[4567]86 and x86_64, where Linux kernel version 2.6.32 or later | |
22 | suffices. | |
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24 | Also note that the shared version of the libgcc_s library must be |
25 | installed for the pthread library to work correctly. | |
26 | ||
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27 | The GNU C Library supports these configurations for using Linux kernels: |
28 | ||
75eff3fe | 29 | aarch64*-*-linux-gnu |
68b7efaa | 30 | alpha*-*-linux-gnu |
c6bfe5c4 | 31 | arm-*-linux-gnueabi |
5abebba4 | 32 | hppa-*-linux-gnu Not currently functional without patches. |
adae8f5e | 33 | i[4567]86-*-linux-gnu |
ee9247c3 | 34 | x86_64-*-linux-gnu Can build either x86_64 or x32 |
c70a4b1d | 35 | ia64-*-linux-gnu |
73588a72 | 36 | m68k-*-linux-gnu |
ef114eaf | 37 | microblaze*-*-linux-gnu |
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38 | mips-*-linux-gnu |
39 | mips64-*-linux-gnu | |
9ec1b13d | 40 | powerpc-*-linux-gnu Hardware or software floating point, BE only. |
8b7d57cd | 41 | powerpc64*-*-linux-gnu Big-endian and little-endian. |
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42 | s390-*-linux-gnu |
43 | s390x-*-linux-gnu | |
6dad2c06 | 44 | sh[34]-*-linux-gnu |
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45 | sparc*-*-linux-gnu |
46 | sparc64*-*-linux-gnu | |
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47 | tilegx-*-linux-gnu |
48 | tilepro-*-linux-gnu | |
3858bf28 | 49 | |
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50 | If you are interested in doing a port, please contact the glibc |
51 | maintainers; see http://www.gnu.org/software/libc/ for more | |
52 | information. | |
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53 | |
54 | See the file INSTALL to find out how to configure, build, and install | |
55 | the GNU C Library. You might also consider reading the WWW pages for | |
56 | the C library at http://www.gnu.org/software/libc/. | |
57 | ||
58 | The GNU C Library is (almost) completely documented by the Texinfo manual | |
59 | found in the `manual/' subdirectory. The manual is still being updated | |
60 | and contains some known errors and omissions; we regret that we do not | |
61 | have the resources to work on the manual as much as we would like. For | |
62 | corrections to the manual, please file a bug in the `manual' component, | |
63 | following the bug-reporting instructions below. Please be sure to check | |
64 | the manual in the current development sources to see if your problem has | |
65 | already been corrected. | |
28f540f4 | 66 | |
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67 | Please see http://www.gnu.org/software/libc/bugs.html for bug reporting |
68 | information. We are now using the Bugzilla system to track all bug reports. | |
69 | This web page gives detailed information on how to report bugs properly. | |
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70 | |
71 | The GNU C Library is free software. See the file COPYING.LIB for copying | |
c6c6dd48 | 72 | conditions, and LICENSES for notices about a few contributions that require |
627145fd | 73 | these additional notices to be distributed. License copyright years may be |
ef0ffcfd | 74 | listed using range notation, e.g., 1996-2015, indicating that every year in |
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75 | the range, inclusive, is a copyrightable year that would otherwise be listed |
76 | individually. |