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1 GNU C Library NEWS -- history of user-visible changes. 2007-2-1
2 Copyright (C) 1992-2006, 2007 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sources.redhat.com/bugzilla/>
6 using `glibc' in the "product" field.
7 \f
8 Version 2.6
10 * New Linux interfaces: epoll_pwait.
12 * New generic interfaces: strerror_l.
14 * nscd can now cache the services database. Implemented by Ulrich Drepper.
16 \f
17 Version 2.5
19 * For Linux, the sorting of addresses returned by getaddrinfo now also
20 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
21 Implemented by Ulrich Drepper.
23 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
24 Implemented by Ulrich Drepper.
26 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
28 * New iconv module for MIK. Contributed by Alexander Shopov.
30 * For sites with broken group and/or passwd database, the auto-propagate
31 option of nscd can prevent creating ID lookup entries from the results
32 of a name lookup and vice versa. This usually is no problem but some
33 site might have problems with the default behavior.
34 Implemented by Ulrich Drepper.
36 * Iterating over entire database in NIS can be slow. With the
37 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
38 to trade time for memory. The entire database will be read at once.
39 Implemented by Ulrich Drepper.
41 * The interfaces introduced in RFC 3542 have been implemented by
42 Ulrich Drepper.
44 * Support for the new ELF hash table format was added by Ulrich Drepper.
46 * Support for priority inheritance mutexes added by Jakub Jelinek and
47 Ulrich Drepper.
49 * Support for priority protected mutexes added by Jakub Jelinek.
51 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
52 or_IN, csb_PL, fy_NL, sr_ME.
53 \f
54 Version 2.4
56 * More overflow detection functions.
58 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
59 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
61 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
62 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
63 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
64 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
65 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
66 by Masahide Washizawa.
68 * It is now possible to install audit libraries for the dynamic linker using
69 LD_AUDIT. Implemented by Ulrich Drepper.
71 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
72 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
73 For a libc and libpthread that works well on Linux 2.4 kernels, we
74 recommend using the stable 2.3 branch.
76 * The new function open_wmemstream acts like open_memstream,
77 but uses a wchar_t wide character buffer.
79 * The new function ppoll is an improved version of poll, similar to pselect.
81 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
82 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
83 renameat, unlinkat, linkat, symlinkat, readlinkat.
85 * New Linux kernel system calls: unshare,
86 inotify_init, inotify_add_watch, inotify_rm_watch.
88 * The euidaccess function is now also known by the alias eaccess,
89 for compatibility with some other systems.
91 * Timezone data updated to 2006b version.
92 \f
93 Version 2.3.6
95 * The following bugs are resolved with this release:
97 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
98 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
99 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
100 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
101 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
102 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
104 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
106 * As of this release, GCC 4 can be used to compile the C Library.
108 * Timezone data updated to 2005m version.
109 \f
110 Version 2.3.5
112 * The following bugs are resolved with this release:
114 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
115 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
116 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
117 777, 787, 821, 822, 823, 825
119 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
120 \f
121 Version 2.3.4
123 * Support for RFC 3678. Real implementations exist only for Linux so far.
124 Implemented by Ulrich Drepper.
126 * nscd can now cache entries persistently. Expiring entries are reloaded.
127 For speedups the cache can be shared in memory with client processes.
128 Implemented by Ulrich Drepper.
130 * nscd can now perform SELinux checks.
131 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
133 * getaddrinfo queries are now cached. Canonical name lookup is performed
134 efficiently.
135 Implemented by Ulrich Drepper.
137 * The nothrow function attribute is used when headers are used by gcc when
138 compiling C code. This can avoid significant amounts of exception
139 handling data.
141 * The malloc functions perform more error checking and are stricter when
142 it comes to reacting on errors. The default action is to terminate
143 the process after showing an error message. Implemented by Ulrich Drepper.
145 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
146 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
148 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
149 namespaces using the new function dlmopen(). This feature is of course,
150 like most other dynamic loading functionality, not available in statically
151 linked applications. Implemented by Ulrich Drepper.
153 * Low-overhead boundary checking variants of string and some stdio functions
154 were added. These are to be used in conjunction with a gcc patch by
155 Jakub Jelinek which adds calls to these functions if possible.
156 Implemented by Jakub Jelinek and Ulrich Drepper.
158 * Old code for several operating systems and machine architectures that
159 have not been in working condition in a long time have been removed from
160 the main source tree maintained by the GNU C Library's maintainers.
161 These files are now reside in the separate `ports' source module
162 that is usable as an add-on when building the library.
163 \f
164 Version 2.3.3
166 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
167 interrogate the dynamic linker, compatible with the Solaris interface.
169 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
170 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
172 * getifaddrs now uses the netlink interface on Linux to get its information.
173 Implemented by Thorsten Kukuk.
175 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
176 Implemented by Ulrich Drepper.
178 * support for non-executable stacks on x86 has been added. Changes mostly
179 by Roland McGrath.
181 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
182 and Ulrich Drepper.
184 * getaddrinfo now performs destination address selection according to
185 RFC 3484.
186 \f
187 Version 2.3.2
189 * Thread-safe interfaces for many functions that access locale data
190 were added in version 2.3, but these features were omitted from NEWS.
191 Many functions have variants with an `_l' suffix that take a `locale_t'
192 object as a parameter rather than consulting the current locale.
193 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
194 create and maintain `locale_t' objects. Additionally, the new function
195 `uselocale' sets "the current locale" (as used by functions not so
196 parameterized) set for an individual thread. These features were added
197 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
199 * The functions getresuid, getresgid, setresuid, and setresgid, which
200 have long been available on Linux, are now declared in <unistd.h>
201 and are now also available on the Hurd.
203 * ELF thread-local storage support (TLS) now works on x86-64.
205 * The new dynamic string token $LIB is expanded in shared library names.
206 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
208 * Aldy Hernandez contributed complete software floating point support for
209 PowerPC machines with no FPU.
211 * fexecve is implemented on Linux.
213 * The `btowc' function should work at least twice as fast due to
214 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
216 * With approriate thread add-ons cancelable functions are now implemented
217 in libc.so as well. No need to call the function in libpthread. This
218 change allowed to finally disable the incorrect and expensive handling
219 of weak definition in ld.so.
221 * Yet more PLT entries in libc.so have been removed. We finally arrived
222 at the bare minimum. Startup times improved appropriately.
224 * Support for the new Linux/x86 system call interface was added. The
225 AT_SYSINFO auxiliary vector entry is recognized and handled.
226 \f
227 Version 2.3
229 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
230 charsets.
232 * iconv (the program and the interface) now accepts empty names (excluding
233 options like //TRANSLIT) to mean "use charset of current locale".
235 * localedef can now transliterate characters in strings which are not in
236 the provided charmap. The information from the input locale is used.
238 * Prelinking support was added for ELF targets. This requires additional
239 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
241 * Read-only stdio streams now use mmap to speed up operation by eliminating
242 copying and buffer underflows. To use add 'm' to the mode string of
243 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
245 * The malloc functions were completely rewritten by Wolfram Gloger based
246 on Doug Lea's malloc-2.7.0.c.
248 * Isamu Hasegawa contributed a completely new and POSIX-conformant
249 implementation of regex.
251 * Bruno Haible upgraded the iconv and locale implementation to support
252 Unicode 3.2.
254 * Contents of the LC_* and LANG environment variables in the CEN style are
255 not recognized anymore. It never was used. Change by Ulrich Drepper.
257 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
258 thread-local storage (TLS) ABI on some platforms.
259 Changes by Ulrich Drepper. SH support by Kaz Kojima.
261 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
262 EUC-JISX0213, and TSCII.
264 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
265 BSD-compatible interface for getting all network interface addresses.
266 Implementation for IPv4 by Roland McGrath.
268 * Loading of locale data is faster due to the introduction of a locale
269 archive. Implemented by Roland McGrath and Ulrich Drepper.
271 * Startup times are significantly reduced by not using exported functions
272 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
273 and Ulrich Drepper.
275 * Steven Munroe contributed a port to PowerPC64/Linux.
276 \f
277 Version 2.2.6
279 * The Hurd now uses the GNU libio implementation of stdio rather than the
280 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
282 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
283 with the same behavior as the Linux system call of the same name.
284 \f
285 Version 2.2.5
287 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
288 128-bit long double format.
290 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
291 IBM1161, and IBM1162 charsets.
293 * Andreas Jaeger contributed a port to x86-64/Linux.
295 * Peter Bruin contributed a port to PowerPC/Hurd.
297 * libc functions using I/O streams now can handle wide-oriented streams
298 as well.
300 * optimizations in the dynamic linker. Binaries created by recent binutils
301 versions start up quicker due to reduced time spent on relocations.
303 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
304 \f
305 Version 2.2.4
307 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
308 asinh, atanh, j0 for the 128-bit long double format.
310 * Bruno Haible updated all the code handling Unicode in some form to
311 support Unicode 3.1.
313 * Speed of regex for single-byte locales is back to previous levels.
314 Patch by Isamu Hasegawa.
316 * Alpha, SPARC, and IA-64 now also using floating stacks.
318 * Startup time of internationalized applications greatly improved through
319 iconv cache. Use iconvconfig to generate the cache file.
320 Contributed by Ulrich Drepper.
322 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
323 severe performance problems. Patch by David Mosberger.
325 * The Hurd port got a lot more functionality like AIO, various stdio
326 extensions, etc. Mainly done by Roland McGrath.
328 * mtrace can now lookup symbols in shared libraries.
329 \f
330 Version 2.2.3
332 * Intel's IA-64 math library is largely integrated. It provides fast and
333 accurate implementatations for most basic and standard math functions
334 in float, double, and long double format.
336 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
337 and asin for the 96-bit long double format and asin, log, tan for the
338 128-bit long double format.
340 * The beginning of a last-bit accurate math library by IBM Haifa were added.
341 The basic double functions exist today. Contributed by Abraham Ziv
342 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
343 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
345 * An asynchronous name lookup library was added. The interface is designed
346 after POSIX AIO. The proposal was circulated beforehand to get comments.
347 No negative ones came in. Implemented by Ulrich Drepper.
349 * Port to S390/64bit contributed by Martin Schwidefsky
350 <schwidefsky@de.ibm.com>.
352 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
353 of functions for Linux/IA-64.
355 * The RPC code is now thread safe. Threads can now use the same service
356 of different services at the same time. Patch by Eric Norum
357 <eric.norum@usask.ca> with some help by Ulrich Drepper.
359 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
360 family of functions for Linux/S390.
362 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
363 of functions for Linux/x86.
365 * Port to Linux/CRIS contributed by Axis Communications.
366 \f
367 Version 2.2.2
369 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
370 we can now check for namespace violations and missing declarations. The
371 result is that almost all headers are now Unix-compliant (as defined in
372 the upcoming XPG6). The negative side is that some programs might need
373 corrections, too, if they depend on the incorrect form of the headers in
374 previous versions which defined too many symbols and included too many
375 other headers.
377 * regex now handles multibyte character sets correctly.
378 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
380 * iconv (the program) does now conform to the upcoming XPG6 and handles
381 charmaps. Instead of the charset names the path of charmaps can be
382 provided and the conversion happens based on this data.
383 Contributed by Ulrich Drepper.
385 * The locale program now provides detailed information about the installed
386 locales. While
388 locale -a
390 only lists the names of the supported locales
392 locale -a --verbose
394 provides details such as country, language, and codeset name.
395 Contributed by Ulrich Drepper.
396 \f
397 Version 2.2.1
399 * The gencat program now parses the input file according to the charset
400 selected by the LC_CTYPE category. This is important for stateful
401 character sets. To make generating catalogs easier there is a way
402 to overwrite the charset selected by the locale: before the first
403 message or $ quote line the catalog can contain a line like
405 $ codeset=ISO-8859-2
407 to select the charset (ISO-8859-2 in this case).
409 Implemented by Shinya Hanataka and Ulrich Drepper.
411 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
412 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
413 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
415 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
416 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
418 * The LANGUAGE environment variable is now ignored unless the locale is
419 changed from the default "C" locale.
421 * The usual bug fixes.
422 \f
423 Version 2.2
425 * Greg McGary added runtime support for bounds checking using gcc's
426 new -fbounded-pointers option. ix86 target is complete. PowerPC
427 is in progress.
429 * Thorsten Kukuk added secure mode support to nscd.
431 * The Berkeley db libraries have been removed.
433 Related, the nss_db module is now in a separate package since it
434 obviously requires a database library being available.
436 * Wide character I/O streams implemented by Ulrich Drepper.
438 * Functions from the extended socket API added by Ulrich Drepper.
440 * Functions feenableexcept and fedisableexcept to control the
441 behaviour of individual exceptions have been added by Andreas Jaeger.
443 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
445 * The resolver code has been updated from bind 8.2.3-T5B which supports
446 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
447 and Mark Kettenis.
449 This change could in some situations effect backward compatibility. Since
450 now `_res' is a thread-local instead of a global variable, modifying it
451 in one thread does not have any effect in other threads.
453 The resolver library was also extended to allow IPv6 as the transport
454 protocol for the requests. This work was done by Stig Venaas.
456 * Compatibility code for K&R C compilers has been removed from the
457 header files. A ISO C compiler is needed to use the library
458 (conforming to either C89 or C99 standard).
460 * Complete rewrite of the localedef program to support multibyte character
461 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
462 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
463 Implemented by Ulrich Drepper.
465 Bruno Haible significantly improved the generation and use of the data
466 structures for the wide character tables.
468 * Plural handling in gettext implemented by Ulrich Drepper.
470 * The utmp daemon has been removed.
472 * The port to MIPS-Linux has been finished by Andreas Jaeger.
474 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
475 and Yutaka Niibe.
477 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
479 * POSIX barriers implemented by Kaz Kylheku.
481 * POSIX spawn function family implemented by Ulrich Drepper.
483 * POSIX spinlocks are now available.
485 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
487 * the configure option --enable-kernel=X.Y.Z allows to strip out
488 compatibility for kernel versions before X.Y.Z. This is currently only
489 implemented for Linux.
491 * the sockaddr_in6 structure changed. The IPv6 working group added a new
492 field sin6_scope_id. This means that all programs using IPv6 should be
493 recompiled. Don't expect binary compatibility with previous glibc
494 versions.
496 * various conversion modules for IBM character sets contributed by
497 Masahide Washizawa.
499 * IA-64 port by Jes Sorensen and HJ Lu.
501 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
502 Compiling the GNU C Library for Linux/ia64
503 ******************************************
505 Please refer to the file INSTALL in the same directory as you found
506 this file for general information about configuring and compiling
507 glibc.
509 For general inquiries about glibc under Linux/ia64 please use the
510 following mailing list linux-ia64@linuxia64.org or one of the relevant
511 glibc mailing lists.
513 Recommended Tools for Compilation
514 =================================
516 In order for glibc-2.2 to build correctly on the ia64 you need at
517 least the following versions of the GNU tools (the :
519 * The Cygnus toolchain snapshot for the ia64 as of August 4
520 including the provided set of patches. It is however recommend
521 you use the October 24 toolchain snapshot or a more recent version.
523 OR alternatively you can try the following (the Cygnus toolchain is
524 the recommended solution):
526 * GCC and binutils, GAS and GNU LD out of CVS from
527 sources.redhat.com as of August 28, 2000 or later. The CVS tree
528 may require special patches to work properly on the ia64.
530 Configuring and compiling GNU Libc for Linux/ia64
531 =================================================
533 The library requires Linux kernel version 2.4.0-test4-000728 or
534 later to funtion properly. Besides that it support for debug libraries
535 is currently untested. Hence the following options
536 are required for configuring the library:
538 --disable-debug --enable-kernel=2.4.0
540 It is also important that you make sure the library picks up the
541 appropriate kernel header files, if you do not have recent enough
542 kernel headers in /usr/src/linux/include, you should use the
543 --with-headers=<path> option to specify the location.
545 As an example I personally use the following options to configure
546 the library:
548 --disable-debug
549 --disable-cvs
550 --enable-kernel=2.4.0
551 --host=ia64-linux
552 --enable-add-ons=yes
553 --prefix=/usr
554 --with-headers=/home/jes/linux/include
557 Good luck
559 Jes Sorensen <jes@linuxcare.com>,
560 November 14th, 2000
561 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
562 \f
563 Version 2.1.3
565 * bug fixes
567 \f
568 Version 2.1.2
570 * bug fixes
572 \f
573 Version 2.1.1
575 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
577 * New xdr functions are added; some rpc functions are now 64bit clean.
579 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
581 * Fixed known incompatibilities with glibc 2.0.
583 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
585 * Optimized a number of functions (especially the ELF dynamic loader).
587 * Update timezone data files.
589 * lots of charmaps corrections
591 * some new locale definitions and charmaps
593 \f
594 Version 2.1
596 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
597 conform to POSIX member type requirements. Symbol versions have been
598 adjusted as needed within the library, and for direct use by applications,
599 but there is potential for problems if third-party libraries use
600 struct timeval as part of their interface. This does not present
601 a problem for X and other "essential" system libraries.
603 * An additional locale model to support C++ Standard Library locale
604 model and probably more was implemented by Ulrich Drepper.
606 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
607 symbol level.
609 * Miles Bader provided the `argp' function family to support hierachical
610 command line argument parsing, layered on top of getopt.
612 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
614 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
615 numbers.
617 * scanf recognizes the %a and %A format for scanning floating point numbers.
619 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
620 information and interfaces for the available integer types.
622 * about 130 new math functions were added to implement the ISO C9x math
623 library.
625 * the new header <complex.h> contains definitions of the complex math
626 functions from ISO C 9X.
628 * the new header <tgmath.h> defines generic macros to use complex or
629 real valued functions.
631 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
633 * Andreas Jaeger provided a test suite for the math library.
635 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
637 * Ulrich Drepper added character set conversion functions (iconv).
639 * Optimized string functions have been added.
641 * The localedata addon is now part of glibc.
643 * An implementation of profiling shared libraries was added by Ulrich Drepper.
645 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
646 daemon for NSS (nscd).
648 Missing a better place here are some numbers on improvements. Under
649 Linux 2.1.125 un-tar-ing the kernel sources takes
651 user system wall
653 using local files 12.19s 6.88s 22.91s
655 using NIS 13.92s 8.91s 26.34s
657 using NIS & nscd 10.37s 7.34s 25.30s
659 using NIS+ 27.57s 30.37s 640.46s
661 using NIS+ & nscd 10.25s 7.83s 26.51s
663 using NIS & old nscd [1] 13.83s 8.32s 29.60s
665 Keep in mind that non-namelookup related operations dominate above times.
666 It was just a common complain that using NIS+ unpacking the kernel is
667 horribly slow.
669 [1] The old nscd implementation is not available anymore since it was
670 distributed with glibc up to version 2.0.98 and thus is now replaced.
672 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
674 * Mark Kettenis provided a Hesiod NSS module.
676 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
677 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
679 * rcmd can now handle netgroups (Dick Streefland).
681 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
682 Bambrough.
684 * Support for the IPv6 protocol has been added to the socket API, as per the
685 latest draft standards.
687 * Support for Linux 2.2 has been added.
689 * Interface changes relative to the latest 2.0.x release:
690 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
691 addseverity NEW: Unix98
692 alphasort64 NEW: LFS
693 argp_err_exit_status NEW: argp, GNU ext
694 argp_error NEW: argp, GNU ext
695 argp_failure NEW: argp, GNU ext
696 argp_help NEW: argp, GNU ext
697 argp_parse NEW: argp, GNU ext
698 argp_program_bug_address NEW: argp, GNU ext
699 argp_program_version NEW: argp, GNU ext
700 argp_program_version_hook NEW: argp, GNU ext
701 argp_state_help NEW: argp, GNU ext
702 argp_usage NEW: argp, GNU ext
703 authdes_create NEW: Secure RPC
704 authdes_getucred NEW: Secure RPC
705 authdes_pk_create NEW: Secure RPC
706 backtrace NEW: GNU ext.
707 backtrace_symbols NEW: GNU ext.
708 backtrace_symbols_fd NEW: GNU ext.
709 cacos NEW: ISO C 9x
710 cacosf NEW: ISO C 9x
711 cacosh NEW: ISO C 9x
712 cacoshf NEW: ISO C 9x
713 cacoshl NEW: ISO C 9x
714 cacosl NEW: ISO C 9x
715 capget NEW: kernel
716 capset NEW: kernel
717 carg NEW: ISO C 9x
718 cargf NEW: ISO C 9x
719 cargl NEW: ISO C 9x
720 casin NEW: ISO C 9x
721 casinf NEW: ISO C 9x
722 casinh NEW: ISO C 9x
723 casinhf NEW: ISO C 9x
724 casinhl NEW: ISO C 9x
725 casinl NEW: ISO C 9x
726 catan NEW: ISO C 9x
727 catanf NEW: ISO C 9x
728 catanh NEW: ISO C 9x
729 catanhf NEW: ISO C 9x
730 catanhl NEW: ISO C 9x
731 catanl NEW: ISO C 9x
732 cbc_crypt NEW: Secure RPC
733 ccos NEW: ISO C 9x
734 ccosf NEW: ISO C 9x
735 ccosh NEW: ISO C 9x
736 ccoshf NEW: ISO C 9x
737 ccoshl NEW: ISO C 9x
738 ccosl NEW: ISO C 9x
739 cexp NEW: ISO C 9x
740 cexpf NEW: ISO C 9x
741 cexpl NEW: ISO C 9x
742 cimag NEW: ISO C 9x
743 cimagf NEW: ISO C 9x
744 cimagl NEW: ISO C 9x
745 clearerr_locked REMOVED
746 clntunix_create NEW: sunrpc ext
747 clog NEW: ISO C 9x
748 clog10 NEW: ISO C 9x
749 clog10f NEW: ISO C 9x
750 clog10l NEW: ISO C 9x
751 clogf NEW: ISO C 9x
752 clogl NEW: ISO C 9x
753 conj NEW: ISO C 9x
754 conjf NEW: ISO C 9x
755 conjl NEW: ISO C 9x
756 cpow NEW: ISO C 9x
757 cpowf NEW: ISO C 9x
758 cpowl NEW: ISO C 9x
759 cproj NEW: ISO C 9x
760 cprojf NEW: ISO C 9x
761 cprojl NEW: ISO C 9x
762 creal NEW: ISO C 9x
763 crealf NEW: ISO C 9x
764 creall NEW: ISO C 9x
765 creat64 NEW: LFS
766 csin NEW: ISO C 9x
767 csinf NEW: ISO C 9x
768 csinh NEW: ISO C 9x
769 csinhf NEW: ISO C 9x
770 csinhl NEW: ISO C 9x
771 csinl NEW: ISO C 9x
772 csqrt NEW: ISO C 9x
773 csqrtf NEW: ISO C 9x
774 csqrtl NEW: ISO C 9x
775 ctan NEW: ISO C 9x
776 ctanf NEW: ISO C 9x
777 ctanh NEW: ISO C 9x
778 ctanhf NEW: ISO C 9x
779 ctanhl NEW: ISO C 9x
780 ctanl NEW: ISO C 9x
781 des_setparity NEW: Secure RPC
782 ecb_crypt NEW: Secure RPC
783 endutxent NEW: Unix98
784 exp10 NEW: ISO C 9x
785 exp10f NEW: ISO C 9x
786 exp10l NEW: ISO C 9x
787 exp2 NEW: ISO C 9x
788 exp2f NEW: ISO C 9x
789 exp2l NEW: ISO C 9x
790 fattach NEW: STREAMS
791 fdetach NEW: STREAMS
792 fdim NEW: ISO C 9x
793 fdimf NEW: ISO C 9x
794 fdiml NEW: ISO C 9x
795 feclearexcept NEW: ISO C 9x
796 fegetenv NEW: ISO C 9x
797 fegetexceptflag NEW: ISO C 9x
798 fegetround NEW: ISO C 9x
799 feholdexcept NEW: ISO C 9x
800 feof_locked REMOVED
801 feraiseexcept NEW: ISO C 9x
802 ferror_locked REMOVED
803 fesetenv NEW: ISO C 9x
804 fesetexceptflag NEW: ISO C 9x
805 fesetround NEW: ISO C 9x
806 fetestexcept NEW: ISO C 9x
807 feupdateenv NEW: ISO C 9x
808 fflush_locked REMOVED
809 ffsl NEW: GNU ext.
810 ffsll NEW: GNU ext.
811 fgetpos64 NEW: LFS
812 fgets_unlocked NEW: GNU ext.
813 fileno_locked REMOVED
814 fma NEW: ISO C 9x
815 fmaf NEW: ISO C 9x
816 fmal NEW: ISO C 9x
817 fmax NEW: ISO C 9x
818 fmaxf NEW: ISO C 9x
819 fmaxl NEW: ISO C 9x
820 fmin NEW: ISO C 9x
821 fminf NEW: ISO C 9x
822 fminl NEW: ISO C 9x
823 fmtmsg NEW: Unix98
824 fopen64 NEW: LFS
825 fputc_locked REMOVED
826 fputs_unlocked NEW: GNU ext.
827 fread_unlocked NEW: GNU ext.
828 freopen64 NEW: LFS
829 fseeko NEW: Unix98
830 fsetpos64 NEW: LFS
831 fstatfs64 NEW: LFS
832 fstatvfs NEW: Unix98
833 fstatvfs64 NEW: LFS
834 ftello NEW: Unix98
835 ftello64 NEW: LFS
836 ftruncate64 NEW: LFS
837 ftw64 NEW: LFS
838 fwrite_unlocked NEW: GNU ext.
839 gai_strerror NEW: IPv6
840 gamma_r REMOVED
841 gammaf_r REMOVED
842 gammal_r REMOVED
843 getchar_locked REMOVED
844 getdate NEW: Unix98
845 getdate_err NEW: Unix98
846 getdate_r NEW: GNU ext.
847 getmsg NEW: STREAMS
848 getnameinfo NEW: IPv6
849 getnetname NEW: Secure RPC
850 getpmsg NEW: STREAMS
851 getpt NEW: Unix98 PTY
852 getrlimit64 NEW: LFS
853 getutxent NEW: Unix98
854 getutxid NEW: Unix98
855 getutxline NEW: Unix98
856 glob64 NEW: GNU ext.
857 globfree64 NEW: GNU ext.
858 gnu_get_libc_release NEW: GNU ext.
859 gnu_get_libc_version NEW: GNU ext.
860 grantpt NEW: Unix98 PTY
861 host2netname NEW: Secure RPC
862 iconv NEW: iconv
863 iconv_close NEW: iconv
864 iconv_open NEW: iconv
865 if_freenameindex NEW: IPv6
866 if_indextoname NEW: IPv6
867 if_nameindex NEW: IPv6
868 if_nametoindex NEW: IPv6
869 in6addr_any NEW: IPv6
870 in6addr_loopback NEW: IPv6
871 inet6_isipv4mapped NEW: IPv6
872 isastream NEW: STREAMS
873 iswblank NEW: GNU ext.
874 key_decryptsession NEW: Secure RPC
875 key_decryptsession_pk NEW: Secure RPC
876 key_encryptsession NEW: Secure RPC
877 key_encryptsession_pk NEW: Secure RPC
878 key_gendes NEW: Secure RPC
879 key_get_conv NEW: Secure RPC
880 key_secretkey_is_set NEW: Secure RPC
881 key_setnet NEW: Secure RPC
882 key_setsecret NEW: Secure RPC
883 llrint NEW: ISO C 9x
884 llrintf NEW: ISO C 9x
885 llrintl NEW: ISO C 9x
886 llround NEW: ISO C 9x
887 llroundf NEW: ISO C 9x
888 llroundl NEW: ISO C 9x
889 log2 NEW: ISO C 9x
890 log2f NEW: ISO C 9x
891 log2l NEW: ISO C 9x
892 lrint NEW: ISO C 9x
893 lrintf NEW: ISO C 9x
894 lrintl NEW: ISO C 9x
895 lround NEW: ISO C 9x
896 lroundf NEW: ISO C 9x
897 lroundl NEW: ISO C 9x
898 lseek64 NEW: LFS
899 makecontext NEW: Unix98
900 mempcpy NEW: GNU ext.
901 mmap64 NEW: LFS
902 moncontrol REMOVED
903 modify_ldt NEW: kernel
904 nan NEW: ISO C 9x
905 nanf NEW: ISO C 9x
906 nanl NEW: ISO C 9x
907 nearbyint NEW: ISO C 9x
908 nearbyintf NEW: ISO C 9x
909 nearbyintl NEW: ISO C 9x
910 netname2host NEW: Secure RPC
911 netname2user NEW: Secure RPC
912 nexttoward NEW: ISO C 9x
913 nexttowardf NEW: ISO C 9x
914 nexttowardl NEW: ISO C 9x
915 nftw NEW: Unix98
916 nftw64 NEW: LFS
917 open64 NEW: LFS
918 passwd2des NEW: Secure RPC
919 pow10 NEW: GNU ext.
920 pow10f NEW: GNU ext.
921 pow10l NEW: GNU ext.
922 pread NEW: Unix98
923 pread64 NEW: LFS
924 printf_size NEW: GNU ext.
925 printf_size_info NEW: GNU ext.
926 profil_counter REMOVED
927 pthread_mutexattr_getkind_np REPLACED
928 pthread_mutexattr_setkind_np REPLACED
929 ptsname NEW: Unix98 PTY
930 ptsname_r NEW: Unix98 PTY
931 putc_locked REMOVED
932 putchar_locked REMOVED
933 putgrent NEW: GNU ext.
934 putmsg NEW: STREAMS
935 putpmsg NEW: STREAMS
936 pututxline NEW: Unix98
937 pwrite NEW: Unix98
938 pwrite64 NEW: LFS
939 readdir64 NEW: LFS
940 readdir64_r NEW: LFS
941 remquo NEW: ISO C 9x
942 remquof NEW: ISO C 9x
943 remquol NEW: ISO C 9x
944 round NEW: ISO C 9x
945 roundf NEW: ISO C 9x
946 roundl NEW: ISO C 9x
947 rtime NEW: GNU ext.
948 scalbln NEW: ISO C 9x
949 scalblnf NEW: ISO C 9x
950 scalblnl NEW: ISO C 9x
951 scandir64 NEW: LFS
952 sendfile NEW: kernel
953 setcontext NEW: Unix98
954 setrlimit64 NEW: LFS
955 setutxent NEW: Unix98
956 sighold NEW: Unix98
957 sigignore NEW: Unix98
958 sigqueue NEW: POSIX.1b
959 sigrelse NEW: Unix98
960 sigset NEW: POSIX.1b
961 sigtimedwait NEW: POSIX.1b
962 sigwaitinfo NEW: POSIX.1b
963 sincos NEW: GNU ext.
964 sincosf NEW: GNU ext.
965 sincosl NEW: GNU ext.
966 statfs64 NEW: LFS
967 statvfs NEW: Unix98
968 statvfs64 NEW: LFS
969 strcasestr NEW: GNU ext.
970 strtoimax NEW: ISO C 9x
971 strtoumax NEW: ISO C 9x
972 strverscmp NEW: GNU ext.
973 svcauthdes_stats NEW: Secure RPC
974 svcunix_create NEW: sunrpc etx
975 svcunixfd_create NEW: sunrpc ext
976 swapcontext NEW: Unix98
977 tcgetsid NEW: Unix98 PTY
978 tdestroy NEW: GNU ext.
979 tgamma NEW: ISO C 9x
980 tgammaf NEW: ISO C 9x
981 tgammal NEW: ISO C 9x
982 tmpfile64 NEW: LFS
983 trunc NEW: ISO C 9x
984 truncate64 NEW: LFS
985 truncf NEW: ISO C 9x
986 truncl NEW: ISO C 9x
987 umount2 NEW: kernel
988 unlockpt NEW: Unix98 PTY
989 updwtmpx NEW: Unix98
990 user2netname NEW: Secure RPC
991 utmpxname NEW: Unix98
992 versionsort NEW: GNU ext.
993 versionsort64 NEW: GNU ext.
994 waitid NEW: Unix98
995 wcscasecmp NEW: GNU ext.
996 wcsncasecmp NEW: GNU ext.
997 wcsnlen NEW: GNU ext.
998 wcstoimax NEW: ISO C 9x
999 wcstoll NEW: ISO C 9x
1000 wcstoull NEW: ISO C 9x
1001 wcstoumax NEW: ISO C 9x
1002 wcswcs NEW: Unix98
1003 wordexp NEW: POSIX.2
1004 wordfree NEW: POSIX.2
1005 write_profiling REMOVED
1006 xdecrypt NEW: Secure RPC
1007 xdr_authdes_cred NEW: Secure RPC
1008 xdr_authdes_verf NEW: Secure RPC
1009 xdr_cryptkeyarg NEW: Secure RPC
1010 xdr_cryptkeyarg2 NEW: Secure RPC
1011 xdr_cryptkeyres NEW: Secure RPC
1012 xdr_getcredres NEW: Secure RPC
1013 xdr_key_netstarg NEW: Secure RPC
1014 xdr_key_netstres NEW: Secure RPC
1015 xdr_keybuf NEW: Secure RPC
1016 xdr_keystatus NEW: Secure RPC
1017 xdr_netnamestr NEW: Secure RPC
1018 xdr_sizeof NEW: Secure RPC
1019 xdr_unixcred NEW: sunrpc ext
1020 xencrypt NEW: Secure RPC
1021 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1022 \f
1023 Version 2.0.6
1025 * more bug fixes
1027 \f
1028 Version 2.0.5
1030 * more bug fixes
1032 * inet_ntoa is thread-safe
1034 * updwtmp is moved from libutil to libc
1036 * rewrite of cbrt function
1038 * update of timezone data
1039 \f
1040 Version 2.0.4
1042 * more bug fixes
1043 \f
1044 Version 2.0.3
1046 * more bug fixes
1047 \f
1048 Version 2.0.2
1050 * more bug fixes
1052 * add atoll function
1054 * fix complex problems in Berkeley DB code
1056 * fix math functions
1057 \f
1058 Version 2.0.1
1060 * fixed lots of header problems (especially Linux/GNU specific)
1062 * dynamic loader preserves all registers
1064 * Roland McGrath provided support for handling of auxiliary objects in
1065 the ELF dynamic loader.
1067 * support for parallel builds is improved
1068 \f
1069 Version 2.0
1071 * GNU extensions are no longer declared by default. To enable them you
1072 must define the macro `_GNU_SOURCE' in your program or compile with
1073 `-D_GNU_SOURCE'.
1075 * The library has changed from using GNU ld symbol aliases to using weak
1076 symbols where available. The ELF object file format supports weak
1077 symbols; GNU ld also supports weak symbols in the a.out format. (There
1078 is also now support for other GNU ld extensions in ELF. Use the
1079 `--with-elf' option to configure to indicate you have ELF, and
1080 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1081 of many files which contained only symbol aliases, reducing the size of
1082 the source and the compiled library; many other files were renamed to
1083 less cryptic names previously occupied by the symbol alias files.
1084 There is a new header file <elf.h> for programs which operate on
1085 files in the ELF format.
1087 * Converted to Autoconf version 2, so `configure' has more options.
1088 Run `configure --help' to see the details.
1090 * The library can now be configured to build profiling, highly-optimized
1091 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1092 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1093 `configure' enable building these extra libraries. The shared library is
1094 built by default when using both ELF and GNU ld. When shared libraries
1095 are enabled, the new library `-ldl' is available for arbitrary run-time
1096 loading of shared objects; its interface is defined in <dlfcn.h>. The
1097 new header file <link.h> gives access to the internals of the run-time
1098 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1099 application of same name on other systems and it provides information
1100 about dynamically linked binaries.
1102 * The C library now provides the run-time support code for profiling
1103 executables compiled with `-pg'. Programs can control the profiling code
1104 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1105 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1106 the support for this file format was contributed by David Mosberger-Tang.
1108 * The math code has been replaced with a math library based on fdlibm from
1109 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1110 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1111 functions. The math functions now reside in a separate library, so
1112 programs using them will need to use `-lm' their linking commands.
1114 * John C. Bowman contributed optimized ix87 assembler inline functions.
1116 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1117 mechanism similar to that found in Solaris 2. This is now used for the
1118 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1119 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1120 file controls what services are used for each individual database. This
1121 works by loading shared libraries with names specified in `nsswitch.conf',
1122 so service modules can be changed or added at any time without even
1123 relinking any program. Currently there are the file, db, and NIS based
1124 NSS services available.
1126 * The new functions `strtoq' and `strtouq' parse integer values from
1127 strings, like `strtol' and `strtoul', but they return `long long int' and
1128 `unsigned long long int' values, respectively (64-bit quantities).
1130 * The new functions `strtof' and `strtold' parse floating-point values from
1131 strings, like `strtod', but they return `float' and `long double' values,
1132 respectively (on some machines `double' and `long double' are the same).
1134 * Ulrich Drepper has contributed new implementations of the floating-point
1135 printing and reading code used in the `printf' family of functions and
1136 `strtod', `strtof', and `strtold'. These new functions are perfectly
1137 accurate, and much faster than the old ones.
1139 * The implementation of the POSIX locale model was completely rewritten by
1140 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1141 to compile the POSIX locale definition.
1143 * The former dummy implementations of the strcoll and strxfrm function are
1144 now replaced by fully functional code contributed by Ulrich Drepper. The
1145 collation information comes from the POSIX locale definitions.
1147 * The new header <langinfo.h> defines an interface for accessing
1148 various locale-dependent data (using the locale chosen with `setlocale').
1150 * Ulrich Drepper has contributed a new suite of functions for operation on
1151 wide-character and multibyte-character strings, in <wchar.h>;
1152 and classification and case conversion of wide characters, in <wctype.h>.
1153 These new functions are conforming to the ISO C, Amendement 1 specification.
1155 * There is now a second implementation of the standard I/O library available.
1156 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1157 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1159 * You can now use positional parameter specifications in format strings
1160 for the `printf' and `scanf' families of functions. For example,
1161 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1162 ``Number 6, Mr Jones''. This is mainly useful when providing different
1163 format strings for different languages, whose grammars may dictate
1164 different orderings of the values being printed. To support this
1165 feature, the interface for `register_printf_handler' has changed; see
1166 the header file <printf.h> for details.
1168 * The `printf' and `scanf' families of functions now understand a new
1169 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1170 to group numbers as indicated by the locale; for `scanf' and friends, this
1171 says to accept as valid only a number with all the proper grouping
1172 separators in the right places. In the default "C" locale, numbers are
1173 not grouped; but locales for specific countries will define the usual
1174 conventions (i.e. separate thousands with `,' in the US locale).
1176 * The pgrp functions have been regularized, slightly incompatibly but much
1177 less confusingly. The core functions are now `getpgid' and `setpgid',
1178 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1179 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1180 provided for compatibility. There is no longer an incompatible `getpgrp'
1181 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1183 * The new header file <fts.h> and suite of functions simplify programs that
1184 operate on directory trees. This code comes from 4.4 BSD.
1186 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1187 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1188 NSS scheme used in glibc.
1190 * There is a new malloc debugging hook `__memalign_hook'.
1192 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1193 `unsigned int' in <sys/types.h>. These are for compatibility only and
1194 their use is discouraged.
1196 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1197 done differently, so that it works even without GNU ld.
1199 * New function `euidaccess' checks allowed access to a file like `access',
1200 but using the effective IDs instead of the real IDs.
1202 * The time zone data files have been updated for the latest and greatest
1203 local time conventions of the countries of the world.
1205 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1206 see <dirent.h>.
1208 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1209 for formatting floating-point numbers. They are provided only for
1210 compatibility; new programs should use `sprintf' instead. There are
1211 also equivalent function for the `long double' floating-point type and
1212 all functions also exist in a reentrant form.
1214 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1215 functions for maintaining the login-record files (primarily of use to
1216 system programs such as `login'), and convenient functions for
1217 allocating and initializing a pseudo-terminal (pty) device.
1219 * Ulrich Drepper has contributed new support for System V style
1220 shared memory and IPC on systems that support it.
1222 * Ulrich Drepper has contributed several miscellaneous new functions found
1223 in System V: The `hsearch' family of functions provide an effective
1224 implementation of hash tables; `a64l' and `l64a' provide a very simple
1225 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1226 number generator.
1228 * Ulrich Drepper has contributed new reentrant counterparts for the
1229 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1231 * Ulrich Drepper has contributed new, highly-optimized versions of several
1232 string functions for the i486/Pentium family of processors.
1234 * Ulrich Drepper has updated the Linux-specific code, based largely
1235 on work done in Hongjiu Lu's version of GNU libc for Linux.
1236 The GNU library now supports Linux versions 2.0.10 and later,
1237 using the ELF object file format (i[3456]86-*-linux).
1239 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1241 * David Mosberger-Tang and Richard Henderson have ported the C library
1242 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1243 dynamic linking support for ELF/Alpha.
1245 * Richard Henderson contributed several Alpha optimized assembler function
1246 for arithmetic and string handling.
1248 * Ulrich Drepper has contributed a new set of message catalog functions to
1249 support multiple languages using the <libintl.h> interface, for use with
1250 his new package GNU gettext. Translation volunteers have contributed
1251 catalogs of the library's messages in Spanish, German, and Korean.
1253 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1254 program and the `catgets' function for reading the catalog files it
1255 creates. (The <libintl.h> interface is preferred; we include the
1256 <nl_types.h> interface using `catgets' only for source compatibility with
1257 programs already written to use it.)
1259 * New header file <values.h> gives SVID-compatible names for <limits.h>
1260 constants.
1262 * Various new macros, declarations, and small header files for compatibility
1263 with 4.4 BSD.
1265 * New function `group_member' is a convenient way to check if a process has
1266 a given effective group ID.
1268 * When using GCC 2.7 and later, the socket functions are now declared in a
1269 special way so that passing an argument of type `struct sockaddr_in *',
1270 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1271 `struct sockaddr *' type, does not generate a type-clash warning.
1273 * New function `error' declared in header file <error.h> is a convenient
1274 function for printing error messages and optionally exiting; this is the
1275 canonical function used in GNU programs. The new functions `err', `warn',
1276 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1277 doing the same thing.
1279 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1280 POSIX.2 `glob' function to do ~ and {...} expansion.
1282 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1283 `clearenv' which is used in POSIX.9 is also available.
1285 * New function `getsid' returns session ID number on systems that support it.
1287 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1288 files <db.h> and <mpool.h> provide a rich set of functions for several
1289 types of simple databases stored in memory and in files, and <ndbm.h> is
1290 an old `ndbm'-compatible interface using the `db' functions. Link with
1291 `-ldb' to get these functions.
1293 * New macro `strdupa' copies a string like `strdup', but uses local stack
1294 space from `alloca' instead of dynamic heap space from `malloc'.
1296 * New function `strnlen' is like `strlen' but searches only a given maximum
1297 number of characters for the null terminator. `stpncpy', `strndup' and
1298 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1299 function.
1301 * New function `statfs' in header <sys/statfs.h>.
1303 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1304 provide convenient functions for operating on blocks of null-terminated
1305 strings.
1307 * A new suite of functions in <utmp.h> handle all the details of reading
1308 and writing the utmp file.
1310 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1311 Thorsten Kukuk.
1313 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1314 completely POSIX compliant and also implemented the extended functionality
1315 to handle alternate digit representation and alternate era date formats.
1317 * Ulrich Drepper provided an implementation of the `strptime' function
1318 defined in XPG4.2 which transforms a string into a `struct tm' value.
1320 * Paul Eggert provided the tzselect shell script as part of the timezone
1321 code. The shell script makes it easy to select the correct timezone
1322 specification.
1324 * The implementation of the malloc family of functions is completely replaced
1325 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1326 The implementation uses the mmap function (if available) and it is
1327 optimized for the use in multi threaded programs.
1329 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1330 functions. This new functionality is usable by specifying a special
1331 salt string and it is compatible with implementation on *BSD systems.
1333 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1334 `getsubopt' to handle second level command line options, `bsd_signal'
1335 to access BSD style `signal' functionality, the obsolete `regexp' style
1336 expression matcher.
1338 * the `lchown' function is available on system which support this
1339 functionality.
1341 * The implementation of the shadow password handling function was contributed
1342 by Ulrich Drepper.
1344 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1346 * POSIX.1g support was added. The <sys/select.h> header is available,
1347 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1348 implementation of `getaddrinfo'.
1349 \f
1350 Version 1.09
1352 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1354 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1355 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1357 * The new function `daemon' from 4.4 BSD is useful for server programs that
1358 want to put themselves in the background.
1360 * Joel Sherrill has contributed support for several standalone boards that
1361 run without an operating system.
1363 * `printf', `scanf' and friends now accept a `q' type modifier for long
1364 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1366 * All of the code taken from BSD (notably most of the math and networking
1367 routines) has been updated from the BSD 4.4-Lite release.
1369 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1371 * The new functions `getdomainname' and `setdomainname' fetch or change the
1372 YP/NIS domain name. These are system calls which exist on systems which
1373 have YP (aka NIS).
1375 * The time zone data files have been updated for the latest international
1376 conventions.
1378 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1379 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1380 \f
1381 Version 1.08
1383 * The C library now includes support for Sun RPC, from Sun's free
1384 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1385 are included. (There is still no support for YP.)
1387 * Tom Quinn has contributed a port of the C library to SGI machines running
1388 Irix 4 (mips-sgi-irix4).
1390 * The new `lockf' function is a simplified interface to the locking
1391 facilities of `fcntl', included for compatibility.
1393 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1395 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1397 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1398 compatibility.
1400 * The error message printed by `assert' for a failed assertion now includes
1401 the name of the program (if using GNU ld) and the name of the calling
1402 function (with versions of GCC that support this).
1404 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1406 * The library now includes the <sys/mman.h> header file and memory
1407 management functions `mmap', `munmap', `mprotect', `msync', and
1408 `madvise', on systems that support those facilities.
1410 * The interface for `mcheck' has changed slightly: the function called to
1411 abort the program when an allocation inconsistency is detected now takes
1412 an argument that indicates the type of failure. The new function
1413 `mprobe' lets you request a consistency check for a particular block at
1414 any time (checks are normally done only when you call `free' or `realloc'
1415 on a block).
1417 * It is now possible to easily cross-compile the C library, building on one
1418 system a library to run on another machine and/or operating system. All
1419 you need to do is set the variable `HOST_CC' in `configparms' to the
1420 native compiler for programs to run on the machine you are building on (a
1421 few generator programs are used on Unix systems); set `CC' to the
1422 cross-compiler.
1424 * The new function `fexecve' (only implemented on the GNU system) executes
1425 a program file given a file descriptor already open on the file.
1426 \f
1427 Version 1.07
1429 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1430 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1432 * You can set the variable `libprefix' in `configparms' to specify a prefix
1433 to be prepended to installed library files; this makes it easy to install
1434 the GNU C library to be linked as `-lgnuc' or whatever.
1436 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1437 copies a limited number of characters from a string, and returns the
1438 address of the last character written.
1440 * You no longer need to check for whether the installed `stddef.h' is
1441 compatible with the GNU C library. configure now checks for you.
1443 * You can now define a per-stream `fileno' function to convert the
1444 stream's cookie into an integral file descriptor.
1446 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1447 allocates zero bytes of storage, and returns a unique pointer which
1448 you can pass to `realloc' or `free'. The behavior is undefined if
1449 you dereference this pointer.
1451 * The C library now runs on Sony NEWS m68k machines running either
1452 NewsOS 3 or NewsOS 4.
1454 * The new `syscall' function is a system-dependent primitive function
1455 for invoking system calls. It has the canonical behavior on Unix
1456 systems, including unreliable return values for some calls (such as
1457 `pipe', `fork' and `getppid').
1459 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1460 to `EAGAIN', which is the preferred name. On systems whose kernels
1461 use two distinct codes, the C library now translates EWOULDBLOCK to
1462 EAGAIN in every system call function.
1463 \f
1464 Version 1.06
1466 * The GNU C Library Reference Manual is now distributed with the library.
1467 `make dvi' will produce a DVI file of the printed manual.
1468 `make info' will produce Info files that you can read on line using C-h i
1469 in Emacs or the `info' program.
1470 Please send comments on the manual to bug-glibc-manual@gnu.org.
1472 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1474 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1476 * Jason Merrill has contributed a port to the Sequent Symmetry running
1477 Dynix version 3 (i386-sequent-dynix).
1479 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1480 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1482 * New function `memory_warnings' lets you arrange to get warnings when
1483 malloc is running out of memory to allocate, like Emacs gives you.
1485 * The C library now contains the relocating allocator used in Emacs 19 for
1486 its editing buffers. This allocator (ralloc) minimizes allocation
1487 overhead and fragmentation by moving allocated regions around whenever it
1488 needs to. You always refer to a ralloc'd region with a "handle" (a
1489 pointer to a pointer--an object of type `void **').
1491 * There is a new `printf' format: `%m' gives you the string corresponding
1492 to the error code in `errno'.
1494 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1495 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1496 pass, the `a' modifier says to fill in a `char **' you pass with a
1497 malloc'd string.
1499 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1500 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1501 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1503 * `mkstemp' is a traditional Unix function to atomically create and open a
1504 uniquely-named temporary file.
1505 \f
1506 Version 1.05
1508 * The standard location for the file that says what the local timezone is
1509 has changed again. It is now `/usr/local/etc/localtime' (or more
1510 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1512 * The distribution no longer contains any files with names longer than 14
1513 characters.
1515 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1516 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1518 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1519 \f
1520 Version 1.04
1522 * The configuration process has changed quite a bit. The `configure'
1523 script is now used just like the configuration scripts for other GNU
1524 packages. The `sysdeps' directory hierarchy is much rearranged.
1525 The file `INSTALL' explains the new scheme in detail.
1527 * The header files no longer need to be processed into ANSI C and
1528 traditional C versions. There is just one set of files to install, and
1529 it will work with ANSI or old C compilers (including `gcc -traditional').
1531 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1532 MIPS DECStation running Ultrix 4.
1534 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1535 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1536 made itself into a shared library.
1538 * Yet further improved support for the i386, running 4.3 BSD-like systems
1539 (such as Mach 3 with the Unix single-server), or System V.
1541 * New function `strncasecmp' to do case-insensitive string comparison
1542 with limited length.
1544 * New function `strsep' is a reentrant alternative to `strtok'.
1546 * New functions `scandir' and `alphasort' for searching directories.
1548 * New function `setenv' is a better interface to `putenv'.
1550 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1551 function for traversing a directory tree.
1553 * The GNU obstack package is now also part of the C library.
1554 The new function `open_obstack_stream' creates a stdio stream that
1555 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1556 formatted output directly to an obstack.
1558 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1559 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1561 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1563 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1564 things to your strings.
1566 * There are some new test programs: test-fseek, testmb, and testrand.
1568 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1569 These ports are not finished, but are a good starting place for really
1570 supporting those systems.
1572 * `/etc/localtime' is now the standard location for the file that says what
1573 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1574 This follows the general principle that `/etc' is the place for all local
1575 configuration files.
1577 * The C library header files now use `extern "C"' when used by the C++
1578 compiler, so the C library should now work with C++ code.
1580 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1581 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
1582 in <strings.h>.)
1584 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1585 function which uses the `merge sort' algorithm, and is said to be
1586 significantly faster than the old GNU `qsort' function. Merge sort is
1587 now the standard `qsort' function. The new algorithm can require a lot
1588 of temporary storage; so, the old sorting function is called when the
1589 required storage is not available.
1591 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1592 provides the Unix `crypt' function, plus some other entry points.
1594 * The code and header files taken from 4.4 BSD have been updated with the
1595 latest files released from Berkeley.
1596 \f
1597 ----------------------------------------------------------------------
1598 Copyright information:
1600 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1601 Free Software Foundation, Inc.
1603 Permission is granted to anyone to make or distribute verbatim copies
1604 of this document as received, in any medium, provided that the
1605 copyright notice and this permission notice are preserved,
1606 thus giving the recipient permission to redistribute in turn.
1608 Permission is granted to distribute modified versions
1609 of this document, or of portions of it,
1610 under the above conditions, provided also that they
1611 carry prominent notices stating who last changed them.
1612 \f
1613 Local variables:
1614 version-control: never
1615 End: