1: @node Contributors, Free Manuals, Maintenance, Top
    2: @c %MENU% Who wrote what parts of the GNU C library
    3: @appendix Contributors to the GNU C Library
    4: 
    5: The GNU C library was written originally by Roland McGrath, and is
    6: currently maintained by Ulrich Drepper.  Some parts of the library were
    7: contributed or worked on by other people.
    8: 
    9: @itemize @bullet
   10: @item
   11: The @code{getopt} function and related code was written by
   12: Richard Stallman, @w{David J.} MacKenzie, and @w{Roland McGrath}.
   13: 
   14: @item
   15: The merge sort function @code{qsort} was written by Michael J. Haertel.
   16: 
   17: @item
   18: The quick sort function used as a fallback by @code{qsort} was written
   19: by Douglas C. Schmidt.
   20: 
   21: @item
   22: The memory allocation functions @code{malloc}, @code{realloc} and
   23: @code{free} and related code were written by Michael J. Haertel,
   24: @w{Wolfram Gloger}, and @w{Doug Lea}.
   25: 
   26: @item
   27: Fast implementations of many of the string functions (@code{memcpy},
   28: @code{strlen}, etc.) were written by Torbj@"orn Granlund.
   29: 
   30: @item
   31: The @file{tar.h} header file was written by David J. MacKenzie.
   32: 
   33: @item
   34: The port to the MIPS DECStation running Ultrix 4
   35: (@code{mips-dec-ultrix4})
   36: was contributed by Brendan Kehoe and Ian Lance Taylor.
   37: 
   38: @item
   39: The DES encryption function @code{crypt} and related functions were
   40: contributed by Michael Glad.
   41: 
   42: @item
   43: The @code{ftw} and @code{nftw} functions were contributed by Ulrich Drepper.
   44: 
   45: @item
   46: The startup code to support SunOS shared libraries was contributed by
   47: Tom Quinn.
   48: 
   49: @item
   50: The @code{mktime} function was contributed by Paul Eggert.
   51: 
   52: @item
   53: The port to the Sequent Symmetry running Dynix version 3
   54: (@code{i386-sequent-bsd}) was contributed by Jason Merrill.
   55: 
   56: @item
   57: The timezone support code is derived from the public-domain timezone
   58: package by Arthur David Olson and his many contributors.
   59: 
   60: @item
   61: The port to the DEC Alpha running OSF/1 (@code{alpha-dec-osf1}) was
   62: contributed by Brendan Kehoe, using some code written by Roland McGrath.
   63: 
   64: @item
   65: The port to SGI machines running Irix 4 (@code{mips-sgi-irix4}) was
   66: contributed by Tom Quinn.
   67: 
   68: @item
   69: The port of the Mach and Hurd code to the MIPS architecture
   70: (@code{mips-@var{anything}-gnu}) was contributed by Kazumoto Kojima.
   71: 
   72: @item
   73: The floating-point printing function used by @code{printf} and friends
   74: and the floating-point reading function used by @code{scanf},
   75: @code{strtod} and friends were written by Ulrich Drepper.  The
   76: multi-precision integer functions used in those functions are taken from
   77: GNU MP, which was contributed by Torbj@"orn Granlund.
   78: 
   79: @item
   80: The internationalization support in the library, and the support
   81: programs @code{locale} and @code{localedef}, were written by Ulrich
   82: Drepper.  Ulrich Drepper adapted the support code for message catalogs
   83: (@file{libintl.h}, etc.) from the GNU @code{gettext} package, which he
   84: also wrote.  He also contributed the @code{catgets} support and the
   85: entire suite of multi-byte and wide-character support functions
   86: (@file{wctype.h}, @file{wchar.h}, etc.).
   87: 
   88: @item
   89: The implementations of the @file{nsswitch.conf} mechanism and the files
   90: and DNS backends for it were designed and written by Ulrich Drepper and
   91: Roland McGrath, based on a backend interface defined by Peter Eriksson.
   92: 
   93: @item
   94: The port to Linux i386/ELF (@code{i386-@var{anything}-linux}) was
   95: contributed by Ulrich Drepper, based in large part on work done in
   96: Hongjiu Lu's Linux version of the GNU C Library.
   97: 
   98: @item
   99: The port to Linux/m68k (@code{m68k-@var{anything}-linux}) was
  100: contributed by Andreas Schwab.
  101: 
  102: @item
  103: The ports to Linux/ARM (@code{arm-@var{ANYTHING}-linuxaout}) and ARM
  104: standalone (@code{arm-@var{ANYTHING}-none}), as well as parts of the
  105: IPv6 support code, were contributed by Philip Blundell.
  106: 
  107: @item
  108: Richard Henderson contributed the ELF dynamic linking code and other
  109: support for the Alpha processor.
  110: 
  111: @item
  112: David Mosberger-Tang contributed the port to Linux/Alpha
  113: (@code{alpha-@var{anything}-linux}).
  114: 
  115: @item
  116: The port to Linux on PowerPC (@code{powerpc-@var{anything}-linux})
  117: was contributed by Geoffrey Keating.
  118: 
  119: @item
  120: Miles Bader wrote the argp argument-parsing package, and the argz/envz
  121: interfaces.
  122: 
  123: @item
  124: Stephen R. van den Berg contributed a highly-optimized @code{strstr} function.
  125: 
  126: @item
  127: Ulrich Drepper contributed the @code{hsearch} and @code{drand48}
  128: families of functions; reentrant @samp{@dots{}@code{_r}} versions of the
  129: @code{random} family; System V shared memory and IPC support code; and
  130: several highly-optimized string functions for i@var{x}86 processors.
  131: 
  132: @item
  133: The math functions are taken from @code{fdlibm-5.1} by Sun
  134: Microsystems, as modified by J.T. Conklin, Ian Lance Taylor,
  135: Ulrich Drepper, Andreas Schwab, and Roland McGrath.
  136: 
  137: @item
  138: The @code{libio} library used to implement @code{stdio} functions on
  139: some platforms was written by Per Bothner and modified by Ulrich Drepper.
  140: 
  141: @item
  142: Eric Youngdale and Ulrich Drepper implemented versioning of objects on
  143: the symbol level.
  144: 
  145: @item
  146: Thorsten Kukuk provided an implementation for NIS (YP) and NIS+,
  147: securelevel 0, 1 and 2.
  148: 
  149: @item
  150: Andreas Jaeger provided a test suite for the math library.
  151: 
  152: @item
  153: Mark Kettenis implemented the utmpx interface and an utmp daemon.
  154: 
  155: @item
  156: Ulrich Drepper added character conversion functions (@code{iconv}).
  157: 
  158: @item
  159: Thorsten Kukuk provided an implementation for a caching daemon for NSS
  160: (nscd).
  161: 
  162: @item
  163: Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
  164: 
  165: @item
  166: Mark Kettenis provided a Hesiod NSS module.
  167: 
  168: @item
  169: The Internet-related code (most of the @file{inet} subdirectory) and
  170: several other miscellaneous functions and header files have been
  171: included from 4.4 BSD with little or no modification.  The copying
  172: permission notice for this code can be found in the file @file{LICENSES}
  173: in the source distribution.
  174: 
  175: @item
  176: The random number generation functions @code{random}, @code{srandom},
  177: @code{setstate} and @code{initstate}, which are also the basis for the
  178: @code{rand} and @code{srand} functions, were written by Earl T. Cohen
  179: for the University of California at Berkeley and are copyrighted by the
  180: Regents of the University of California.  They have undergone minor
  181: changes to fit into the GNU C library and to fit the @w{ISO C} standard,
  182: but the functional code is Berkeley's.@refill
  183: 
  184: @item
  185: The DNS resolver code is taken directly from BIND 4.9.5, which
  186: includes copyrighted code from UC Berkeley and from Digital Equipment
  187: Corporation.  See the file @file{LICENSES} for the text of the DEC license.
  188: 
  189: @item
  190: The code to support Sun RPC is taken verbatim from Sun's
  191: @w{@sc{rpcsrc-4.0}} distribution; see the file @file{LICENSES} for the
  192: text of the license.
  193: 
  194: @item
  195: Some of the support code for Mach is taken from Mach 3.0 by CMU;
  196: the file if_ppp.h is also copyright by CMU, but under a different license;
  197: see the file @file{LICENSES} for the text of the licenses.
  198: 
  199: @item
  200: Many of the IA64 math functions are taken from a collection of
  201: ``Highly Optimized Mathematical Functions for Itanium'' that Intel
  202: makes available under a free license; see the file @file{LICENSES} for
  203: details.
  204: 
  205: @item
  206: The @code{getaddrinfo} and @code{getnameinfo} functions and supporting
  207: code were written by Craig Metz; see the file @file{LICENSES} for
  208: details on their licensing.
  209: 
  210: @item
  211: Many of the IEEE 64-bit double precision math functions
  212: (in the @file{sysdeps/ieee754/dbl-64} subdirectory) come
  213: from the IBM Accurate Mathematical Library, contributed by IBM.
  214: 
  215: @end itemize