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
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.
11 The @code{getopt} function and related code was written by
12 Richard Stallman, @w{David J.} MacKenzie, and @w{Roland McGrath}.
15 The merge sort function @code{qsort} was written by Michael J. Haertel.
18 The quick sort function used as a fallback by @code{qsort} was written
19 by Douglas C. Schmidt.
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}.
27 Fast implementations of many of the string functions (@code{memcpy},
28 @code{strlen}, etc.) were written by Torbj@"orn Granlund.
31 The @file{tar.h} header file was written by David J. MacKenzie.
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.
39 The DES encryption function @code{crypt} and related functions were
40 contributed by Michael Glad.
43 The @code{ftw} and @code{nftw} functions were contributed by Ulrich Drepper.
46 The startup code to support SunOS shared libraries was contributed by
50 The @code{mktime} function was contributed by Paul Eggert.
53 The port to the Sequent Symmetry running Dynix version 3
54 (@code{i386-sequent-bsd}) was contributed by Jason Merrill.
57 The timezone support code is derived from the public-domain timezone
58 package by Arthur David Olson and his many contributors.
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.
65 The port to SGI machines running Irix 4 (@code{mips-sgi-irix4}) was
66 contributed by Tom Quinn.
69 The port of the Mach and Hurd code to the MIPS architecture
70 (@code{mips-@var{anything}-gnu}) was contributed by Kazumoto Kojima.
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.
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.).
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.
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.
99 The port to Linux/m68k (@code{m68k-@var{anything}-linux}) was
100 contributed by Andreas Schwab.
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.
108 Richard Henderson contributed the ELF dynamic linking code and other
109 support for the Alpha processor.
112 David Mosberger-Tang contributed the port to Linux/Alpha
113 (@code{alpha-@var{anything}-linux}).
116 The port to Linux on PowerPC (@code{powerpc-@var{anything}-linux})
117 was contributed by Geoffrey Keating.
120 Miles Bader wrote the argp argument-parsing package, and the argz/envz
124 Stephen R. van den Berg contributed a highly-optimized @code{strstr} function.
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.
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.
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.
142 Eric Youngdale and Ulrich Drepper implemented versioning of objects on
146 Thorsten Kukuk provided an implementation for NIS (YP) and NIS+,
147 securelevel 0, 1 and 2.
150 Andreas Jaeger provided a test suite for the math library.
153 Mark Kettenis implemented the utmpx interface and an utmp daemon.
156 Ulrich Drepper added character conversion functions (@code{iconv}).
159 Thorsten Kukuk provided an implementation for a caching daemon for NSS
163 Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
166 Mark Kettenis provided a Hesiod NSS module.
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.
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
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.
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
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.
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
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.
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.