94 lines
4.5 KiB
Plaintext
94 lines
4.5 KiB
Plaintext
This directory contains the version VERSION release of the GNU C Library.
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The GNU C Library is the standard system C library for all GNU systems,
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and is an important part of what makes up a GNU system. It provides the
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system API for all programs written in C and C-compatible languages such
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as C++ and Objective C; the runtime facilities of other programming
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languages use the C library to access the underlying operating system.
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In GNU/Linux systems, the C library works with the Linux kernel to
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implement the operating system behavior seen by user applications.
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In GNU/Hurd systems, it works with a microkernel and Hurd servers.
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The GNU C Library implements much of the POSIX.1 functionality in the
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GNU/Hurd system, using configurations i[34567]86-*-gnu.
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When working with Linux kernels, the GNU C Library version 2.4 is
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intended primarily for use with Linux kernel version 2.6.0 and later.
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We only support using the NPTL implementation of pthreads, which is now
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the default configuration. Most of the C library will continue to work
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on older Linux kernels and many programs will not require a 2.6 kernel
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to run correctly. However, pthreads and related functionality will not
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work at all on old kernels and we do not recommend using glibc 2.4 with
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any Linux kernel prior to 2.6.
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All Linux kernel versions prior to 2.6.16 are known to have some bugs that
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may cause some of the tests related to pthreads in "make check" to fail.
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If you see such problems, please try the test suite on the most recent
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Linux kernel version that you can use, before pursuing those bugs further.
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The old LinuxThreads add-on implementation of pthreads for older Linux
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kernels is no longer supported, and we are not distributing it with this
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release. Someone has volunteered to revive its maintenance unofficially
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for at least a short time for the benefit of those using Linux kernels
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older than 2.6, but a working version is not presently available. When
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it is in working condition, we will make it available alongside future
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glibc releases. LinuxThreads will not be supported.
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The GNU C Library supports these configurations for using Linux kernels:
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i[34567]86-*-linux-gnu
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x86_64-*-linux-gnu
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powerpc-*-linux-gnu
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powerpc64-*-linux-gnu
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s390-*-linux-gnu
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s390x-*-linux-gnu
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ia64-*-linux-gnu
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sparc*-*-linux-gnu
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sparc64*-*-linux-gnu
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alpha*-*-linux-gnu Requires Linux 2.6.9 for NPTL
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sh[34]-*-linux-gnu Requires Linux 2.6.11
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The code for other CPU configurations supported by volunteers outside of
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the core glibc maintenance effort is contained in the separate `ports'
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add-on. You can find glibc-ports-VERSION distributed separately in the
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same place where you got the main glibc distribution files.
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Currently these configurations are known to work using the `ports' add-on:
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arm-*-linux-gnu Requires Linux 2.6.15 for NPTL, no SMP support
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arm-*-linux-gnueabi Requires Linux 2.6.16-rc1 for NPTL, no SMP
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mips-*-linux-gnu Requires Linux 2.6.12 for NPTL
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mips64-*-linux-gnu Requires Linux 2.6.12 for NPTL
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The ports distribution also contains code for other configurations that
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do not work or have not been maintained recently, but will be of use to
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anyone trying to make a new configuration work. If you are interested
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in doing a port, please contact the glibc maintainers; see
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http://www.gnu.org/software/libc/ for more information.
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See the file INSTALL to find out how to configure, build, and install
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the GNU C Library. You might also consider reading the WWW pages for
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the C library at http://www.gnu.org/software/libc/.
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The GNU C Library is (almost) completely documented by the Texinfo manual
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found in the `manual/' subdirectory. The manual is still being updated
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and contains some known errors and omissions; we regret that we do not
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have the resources to work on the manual as much as we would like. For
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corrections to the manual, please file a bug in the `manual' component,
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following the bug-reporting instructions below. Please be sure to check
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the manual in the current development sources to see if your problem has
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already been corrected.
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The file NOTES contains a description of the feature-test macros used
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in the GNU C library, explaining how you can tell the library what
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facilities you want it to make available.
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Please see http://www.gnu.org/software/libc/bugs.html for bug reporting
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information. We are now using the Bugzilla system to track all bug reports.
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This web page gives detailed information on how to report bugs properly.
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The GNU C Library is free software. See the file COPYING.LIB for copying
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conditions, and LICENSES for notices about a few contributions that require
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these additional notices to be distributed.
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