README

   1 This directory contains the sources of the GNU C Library.
   2 See the file "version.h" for what release version you have.
   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
  14 The GNU C Library implements much of the POSIX.1 functionality in the
  15 GNU/Hurd system, using configurations i[4567]86-*-gnu.  The current
  16 GNU/Hurd support requires out-of-tree patches that will eventually be
  17 incorporated into an official GNU C Library release.
  18
  19 When working with Linux kernels, this version of the GNU C Library
  20 requires Linux kernel version 3.2 or later.
  21
  22 Also note that the shared version of the libgcc_s library must be
  23 installed for the pthread library to work correctly.
  24
  25 The 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
  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.
  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.
  64
  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.
  68
  69 The GNU C Library is free software.  See the file COPYING.LIB for copying
  70 conditions, and LICENSES for notices about a few contributions that require
  71 these additional notices to be distributed.  License copyright years may be
  72 listed using range notation, e.g., 1996-2015, indicating that every year in
  73 the range, inclusive, is a copyrightable year that would otherwise be listed
  74 individually.