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1 GNU C Library NEWS -- history of user-visible changes. 2007-4-25
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 2.6.1
10 * The following bugs are resolved with this release:
12 4512, 4514, 4525, 4586, 4702, 4745, 4858
14 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
16 \f
17 Version 2.6
19 * New Linux interfaces: epoll_pwait, sched_getcpu.
21 * New generic interfaces: strerror_l.
23 * nscd can now cache the services database. Implemented by Ulrich Drepper.
25 \f
26 Version 2.5
28 * For Linux, the sorting of addresses returned by getaddrinfo now also
29 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
30 Implemented by Ulrich Drepper.
32 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
33 Implemented by Ulrich Drepper.
35 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
37 * New iconv module for MIK. Contributed by Alexander Shopov.
39 * For sites with broken group and/or passwd database, the auto-propagate
40 option of nscd can prevent creating ID lookup entries from the results
41 of a name lookup and vice versa. This usually is no problem but some
42 site might have problems with the default behavior.
43 Implemented by Ulrich Drepper.
45 * Iterating over entire database in NIS can be slow. With the
46 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
47 to trade time for memory. The entire database will be read at once.
48 Implemented by Ulrich Drepper.
50 * The interfaces introduced in RFC 3542 have been implemented by
51 Ulrich Drepper.
53 * Support for the new ELF hash table format was added by Ulrich Drepper.
55 * Support for priority inheritance mutexes added by Jakub Jelinek and
56 Ulrich Drepper.
58 * Support for priority protected mutexes added by Jakub Jelinek.
60 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
61 or_IN, csb_PL, fy_NL, sr_ME.
62 \f
63 Version 2.4
65 * More overflow detection functions.
67 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
68 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
70 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
71 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
72 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
73 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
74 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
75 by Masahide Washizawa.
77 * It is now possible to install audit libraries for the dynamic linker using
78 LD_AUDIT. Implemented by Ulrich Drepper.
80 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
81 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
82 For a libc and libpthread that works well on Linux 2.4 kernels, we
83 recommend using the stable 2.3 branch.
85 * The new function open_wmemstream acts like open_memstream,
86 but uses a wchar_t wide character buffer.
88 * The new function ppoll is an improved version of poll, similar to pselect.
90 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
91 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
92 renameat, unlinkat, linkat, symlinkat, readlinkat.
94 * New Linux kernel system calls: unshare,
95 inotify_init, inotify_add_watch, inotify_rm_watch.
97 * The euidaccess function is now also known by the alias eaccess,
98 for compatibility with some other systems.
100 * Timezone data updated to 2006b version.
101 \f
102 Version 2.3.6
104 * The following bugs are resolved with this release:
106 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
107 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
108 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
109 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
110 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
111 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
113 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
115 * As of this release, GCC 4 can be used to compile the C Library.
117 * Timezone data updated to 2005m version.
118 \f
119 Version 2.3.5
121 * The following bugs are resolved with this release:
123 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
124 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
125 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
126 777, 787, 821, 822, 823, 825
128 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
129 \f
130 Version 2.3.4
132 * Support for RFC 3678. Real implementations exist only for Linux so far.
133 Implemented by Ulrich Drepper.
135 * nscd can now cache entries persistently. Expiring entries are reloaded.
136 For speedups the cache can be shared in memory with client processes.
137 Implemented by Ulrich Drepper.
139 * nscd can now perform SELinux checks.
140 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
142 * getaddrinfo queries are now cached. Canonical name lookup is performed
143 efficiently.
144 Implemented by Ulrich Drepper.
146 * The nothrow function attribute is used when headers are used by gcc when
147 compiling C code. This can avoid significant amounts of exception
148 handling data.
150 * The malloc functions perform more error checking and are stricter when
151 it comes to reacting on errors. The default action is to terminate
152 the process after showing an error message. Implemented by Ulrich Drepper.
154 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
155 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
157 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
158 namespaces using the new function dlmopen(). This feature is of course,
159 like most other dynamic loading functionality, not available in statically
160 linked applications. Implemented by Ulrich Drepper.
162 * Low-overhead boundary checking variants of string and some stdio functions
163 were added. These are to be used in conjunction with a gcc patch by
164 Jakub Jelinek which adds calls to these functions if possible.
165 Implemented by Jakub Jelinek and Ulrich Drepper.
167 * Old code for several operating systems and machine architectures that
168 have not been in working condition in a long time have been removed from
169 the main source tree maintained by the GNU C Library's maintainers.
170 These files are now reside in the separate `ports' source module
171 that is usable as an add-on when building the library.
172 \f
173 Version 2.3.3
175 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
176 interrogate the dynamic linker, compatible with the Solaris interface.
178 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
179 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
181 * getifaddrs now uses the netlink interface on Linux to get its information.
182 Implemented by Thorsten Kukuk.
184 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
185 Implemented by Ulrich Drepper.
187 * support for non-executable stacks on x86 has been added. Changes mostly
188 by Roland McGrath.
190 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
191 and Ulrich Drepper.
193 * getaddrinfo now performs destination address selection according to
194 RFC 3484.
195 \f
196 Version 2.3.2
198 * Thread-safe interfaces for many functions that access locale data
199 were added in version 2.3, but these features were omitted from NEWS.
200 Many functions have variants with an `_l' suffix that take a `locale_t'
201 object as a parameter rather than consulting the current locale.
202 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
203 create and maintain `locale_t' objects. Additionally, the new function
204 `uselocale' sets "the current locale" (as used by functions not so
205 parameterized) set for an individual thread. These features were added
206 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
208 * The functions getresuid, getresgid, setresuid, and setresgid, which
209 have long been available on Linux, are now declared in <unistd.h>
210 and are now also available on the Hurd.
212 * ELF thread-local storage support (TLS) now works on x86-64.
214 * The new dynamic string token $LIB is expanded in shared library names.
215 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
217 * Aldy Hernandez contributed complete software floating point support for
218 PowerPC machines with no FPU.
220 * fexecve is implemented on Linux.
222 * The `btowc' function should work at least twice as fast due to
223 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
225 * With approriate thread add-ons cancelable functions are now implemented
226 in libc.so as well. No need to call the function in libpthread. This
227 change allowed to finally disable the incorrect and expensive handling
228 of weak definition in ld.so.
230 * Yet more PLT entries in libc.so have been removed. We finally arrived
231 at the bare minimum. Startup times improved appropriately.
233 * Support for the new Linux/x86 system call interface was added. The
234 AT_SYSINFO auxiliary vector entry is recognized and handled.
235 \f
236 Version 2.3
238 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
239 charsets.
241 * iconv (the program and the interface) now accepts empty names (excluding
242 options like //TRANSLIT) to mean "use charset of current locale".
244 * localedef can now transliterate characters in strings which are not in
245 the provided charmap. The information from the input locale is used.
247 * Prelinking support was added for ELF targets. This requires additional
248 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
250 * Read-only stdio streams now use mmap to speed up operation by eliminating
251 copying and buffer underflows. To use add 'm' to the mode string of
252 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
254 * The malloc functions were completely rewritten by Wolfram Gloger based
255 on Doug Lea's malloc-2.7.0.c.
257 * Isamu Hasegawa contributed a completely new and POSIX-conformant
258 implementation of regex.
260 * Bruno Haible upgraded the iconv and locale implementation to support
261 Unicode 3.2.
263 * Contents of the LC_* and LANG environment variables in the CEN style are
264 not recognized anymore. It never was used. Change by Ulrich Drepper.
266 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
267 thread-local storage (TLS) ABI on some platforms.
268 Changes by Ulrich Drepper. SH support by Kaz Kojima.
270 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
271 EUC-JISX0213, and TSCII.
273 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
274 BSD-compatible interface for getting all network interface addresses.
275 Implementation for IPv4 by Roland McGrath.
277 * Loading of locale data is faster due to the introduction of a locale
278 archive. Implemented by Roland McGrath and Ulrich Drepper.
280 * Startup times are significantly reduced by not using exported functions
281 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
282 and Ulrich Drepper.
284 * Steven Munroe contributed a port to PowerPC64/Linux.
285 \f
286 Version 2.2.6
288 * The Hurd now uses the GNU libio implementation of stdio rather than the
289 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
291 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
292 with the same behavior as the Linux system call of the same name.
293 \f
294 Version 2.2.5
296 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
297 128-bit long double format.
299 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
300 IBM1161, and IBM1162 charsets.
302 * Andreas Jaeger contributed a port to x86-64/Linux.
304 * Peter Bruin contributed a port to PowerPC/Hurd.
306 * libc functions using I/O streams now can handle wide-oriented streams
307 as well.
309 * optimizations in the dynamic linker. Binaries created by recent binutils
310 versions start up quicker due to reduced time spent on relocations.
312 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
313 \f
314 Version 2.2.4
316 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
317 asinh, atanh, j0 for the 128-bit long double format.
319 * Bruno Haible updated all the code handling Unicode in some form to
320 support Unicode 3.1.
322 * Speed of regex for single-byte locales is back to previous levels.
323 Patch by Isamu Hasegawa.
325 * Alpha, SPARC, and IA-64 now also using floating stacks.
327 * Startup time of internationalized applications greatly improved through
328 iconv cache. Use iconvconfig to generate the cache file.
329 Contributed by Ulrich Drepper.
331 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
332 severe performance problems. Patch by David Mosberger.
334 * The Hurd port got a lot more functionality like AIO, various stdio
335 extensions, etc. Mainly done by Roland McGrath.
337 * mtrace can now lookup symbols in shared libraries.
338 \f
339 Version 2.2.3
341 * Intel's IA-64 math library is largely integrated. It provides fast and
342 accurate implementatations for most basic and standard math functions
343 in float, double, and long double format.
345 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
346 and asin for the 96-bit long double format and asin, log, tan for the
347 128-bit long double format.
349 * The beginning of a last-bit accurate math library by IBM Haifa were added.
350 The basic double functions exist today. Contributed by Abraham Ziv
351 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
352 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
354 * An asynchronous name lookup library was added. The interface is designed
355 after POSIX AIO. The proposal was circulated beforehand to get comments.
356 No negative ones came in. Implemented by Ulrich Drepper.
358 * Port to S390/64bit contributed by Martin Schwidefsky
359 <schwidefsky@de.ibm.com>.
361 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
362 of functions for Linux/IA-64.
364 * The RPC code is now thread safe. Threads can now use the same service
365 of different services at the same time. Patch by Eric Norum
366 <eric.norum@usask.ca> with some help by Ulrich Drepper.
368 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
369 family of functions for Linux/S390.
371 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
372 of functions for Linux/x86.
374 * Port to Linux/CRIS contributed by Axis Communications.
375 \f
376 Version 2.2.2
378 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
379 we can now check for namespace violations and missing declarations. The
380 result is that almost all headers are now Unix-compliant (as defined in
381 the upcoming XPG6). The negative side is that some programs might need
382 corrections, too, if they depend on the incorrect form of the headers in
383 previous versions which defined too many symbols and included too many
384 other headers.
386 * regex now handles multibyte character sets correctly.
387 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
389 * iconv (the program) does now conform to the upcoming XPG6 and handles
390 charmaps. Instead of the charset names the path of charmaps can be
391 provided and the conversion happens based on this data.
392 Contributed by Ulrich Drepper.
394 * The locale program now provides detailed information about the installed
395 locales. While
397 locale -a
399 only lists the names of the supported locales
401 locale -a --verbose
403 provides details such as country, language, and codeset name.
404 Contributed by Ulrich Drepper.
405 \f
406 Version 2.2.1
408 * The gencat program now parses the input file according to the charset
409 selected by the LC_CTYPE category. This is important for stateful
410 character sets. To make generating catalogs easier there is a way
411 to overwrite the charset selected by the locale: before the first
412 message or $ quote line the catalog can contain a line like
414 $ codeset=ISO-8859-2
416 to select the charset (ISO-8859-2 in this case).
418 Implemented by Shinya Hanataka and Ulrich Drepper.
420 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
421 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
422 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
424 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
425 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
427 * The LANGUAGE environment variable is now ignored unless the locale is
428 changed from the default "C" locale.
430 * The usual bug fixes.
431 \f
432 Version 2.2
434 * Greg McGary added runtime support for bounds checking using gcc's
435 new -fbounded-pointers option. ix86 target is complete. PowerPC
436 is in progress.
438 * Thorsten Kukuk added secure mode support to nscd.
440 * The Berkeley db libraries have been removed.
442 Related, the nss_db module is now in a separate package since it
443 obviously requires a database library being available.
445 * Wide character I/O streams implemented by Ulrich Drepper.
447 * Functions from the extended socket API added by Ulrich Drepper.
449 * Functions feenableexcept and fedisableexcept to control the
450 behaviour of individual exceptions have been added by Andreas Jaeger.
452 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
454 * The resolver code has been updated from bind 8.2.3-T5B which supports
455 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
456 and Mark Kettenis.
458 This change could in some situations effect backward compatibility. Since
459 now `_res' is a thread-local instead of a global variable, modifying it
460 in one thread does not have any effect in other threads.
462 The resolver library was also extended to allow IPv6 as the transport
463 protocol for the requests. This work was done by Stig Venaas.
465 * Compatibility code for K&R C compilers has been removed from the
466 header files. A ISO C compiler is needed to use the library
467 (conforming to either C89 or C99 standard).
469 * Complete rewrite of the localedef program to support multibyte character
470 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
471 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
472 Implemented by Ulrich Drepper.
474 Bruno Haible significantly improved the generation and use of the data
475 structures for the wide character tables.
477 * Plural handling in gettext implemented by Ulrich Drepper.
479 * The utmp daemon has been removed.
481 * The port to MIPS-Linux has been finished by Andreas Jaeger.
483 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
484 and Yutaka Niibe.
486 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
488 * POSIX barriers implemented by Kaz Kylheku.
490 * POSIX spawn function family implemented by Ulrich Drepper.
492 * POSIX spinlocks are now available.
494 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
496 * the configure option --enable-kernel=X.Y.Z allows to strip out
497 compatibility for kernel versions before X.Y.Z. This is currently only
498 implemented for Linux.
500 * the sockaddr_in6 structure changed. The IPv6 working group added a new
501 field sin6_scope_id. This means that all programs using IPv6 should be
502 recompiled. Don't expect binary compatibility with previous glibc
503 versions.
505 * various conversion modules for IBM character sets contributed by
506 Masahide Washizawa.
508 * IA-64 port by Jes Sorensen and HJ Lu.
510 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
511 Compiling the GNU C Library for Linux/ia64
512 ******************************************
514 Please refer to the file INSTALL in the same directory as you found
515 this file for general information about configuring and compiling
516 glibc.
518 For general inquiries about glibc under Linux/ia64 please use the
519 following mailing list linux-ia64@linuxia64.org or one of the relevant
520 glibc mailing lists.
522 Recommended Tools for Compilation
523 =================================
525 In order for glibc-2.2 to build correctly on the ia64 you need at
526 least the following versions of the GNU tools (the :
528 * The Cygnus toolchain snapshot for the ia64 as of August 4
529 including the provided set of patches. It is however recommend
530 you use the October 24 toolchain snapshot or a more recent version.
532 OR alternatively you can try the following (the Cygnus toolchain is
533 the recommended solution):
535 * GCC and binutils, GAS and GNU LD out of CVS from
536 sources.redhat.com as of August 28, 2000 or later. The CVS tree
537 may require special patches to work properly on the ia64.
539 Configuring and compiling GNU Libc for Linux/ia64
540 =================================================
542 The library requires Linux kernel version 2.4.0-test4-000728 or
543 later to funtion properly. Besides that it support for debug libraries
544 is currently untested. Hence the following options
545 are required for configuring the library:
547 --disable-debug --enable-kernel=2.4.0
549 It is also important that you make sure the library picks up the
550 appropriate kernel header files, if you do not have recent enough
551 kernel headers in /usr/src/linux/include, you should use the
552 --with-headers=<path> option to specify the location.
554 As an example I personally use the following options to configure
555 the library:
557 --disable-debug
558 --disable-cvs
559 --enable-kernel=2.4.0
560 --host=ia64-linux
561 --enable-add-ons=yes
562 --prefix=/usr
563 --with-headers=/home/jes/linux/include
566 Good luck
568 Jes Sorensen <jes@linuxcare.com>,
569 November 14th, 2000
570 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
571 \f
572 Version 2.1.3
574 * bug fixes
576 \f
577 Version 2.1.2
579 * bug fixes
581 \f
582 Version 2.1.1
584 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
586 * New xdr functions are added; some rpc functions are now 64bit clean.
588 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
590 * Fixed known incompatibilities with glibc 2.0.
592 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
594 * Optimized a number of functions (especially the ELF dynamic loader).
596 * Update timezone data files.
598 * lots of charmaps corrections
600 * some new locale definitions and charmaps
602 \f
603 Version 2.1
605 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
606 conform to POSIX member type requirements. Symbol versions have been
607 adjusted as needed within the library, and for direct use by applications,
608 but there is potential for problems if third-party libraries use
609 struct timeval as part of their interface. This does not present
610 a problem for X and other "essential" system libraries.
612 * An additional locale model to support C++ Standard Library locale
613 model and probably more was implemented by Ulrich Drepper.
615 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
616 symbol level.
618 * Miles Bader provided the `argp' function family to support hierachical
619 command line argument parsing, layered on top of getopt.
621 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
623 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
624 numbers.
626 * scanf recognizes the %a and %A format for scanning floating point numbers.
628 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
629 information and interfaces for the available integer types.
631 * about 130 new math functions were added to implement the ISO C9x math
632 library.
634 * the new header <complex.h> contains definitions of the complex math
635 functions from ISO C 9X.
637 * the new header <tgmath.h> defines generic macros to use complex or
638 real valued functions.
640 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
642 * Andreas Jaeger provided a test suite for the math library.
644 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
646 * Ulrich Drepper added character set conversion functions (iconv).
648 * Optimized string functions have been added.
650 * The localedata addon is now part of glibc.
652 * An implementation of profiling shared libraries was added by Ulrich Drepper.
654 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
655 daemon for NSS (nscd).
657 Missing a better place here are some numbers on improvements. Under
658 Linux 2.1.125 un-tar-ing the kernel sources takes
660 user system wall
662 using local files 12.19s 6.88s 22.91s
664 using NIS 13.92s 8.91s 26.34s
666 using NIS & nscd 10.37s 7.34s 25.30s
668 using NIS+ 27.57s 30.37s 640.46s
670 using NIS+ & nscd 10.25s 7.83s 26.51s
672 using NIS & old nscd [1] 13.83s 8.32s 29.60s
674 Keep in mind that non-namelookup related operations dominate above times.
675 It was just a common complain that using NIS+ unpacking the kernel is
676 horribly slow.
678 [1] The old nscd implementation is not available anymore since it was
679 distributed with glibc up to version 2.0.98 and thus is now replaced.
681 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
683 * Mark Kettenis provided a Hesiod NSS module.
685 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
686 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
688 * rcmd can now handle netgroups (Dick Streefland).
690 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
691 Bambrough.
693 * Support for the IPv6 protocol has been added to the socket API, as per the
694 latest draft standards.
696 * Support for Linux 2.2 has been added.
698 * Interface changes relative to the latest 2.0.x release:
699 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
700 addseverity NEW: Unix98
701 alphasort64 NEW: LFS
702 argp_err_exit_status NEW: argp, GNU ext
703 argp_error NEW: argp, GNU ext
704 argp_failure NEW: argp, GNU ext
705 argp_help NEW: argp, GNU ext
706 argp_parse NEW: argp, GNU ext
707 argp_program_bug_address NEW: argp, GNU ext
708 argp_program_version NEW: argp, GNU ext
709 argp_program_version_hook NEW: argp, GNU ext
710 argp_state_help NEW: argp, GNU ext
711 argp_usage NEW: argp, GNU ext
712 authdes_create NEW: Secure RPC
713 authdes_getucred NEW: Secure RPC
714 authdes_pk_create NEW: Secure RPC
715 backtrace NEW: GNU ext.
716 backtrace_symbols NEW: GNU ext.
717 backtrace_symbols_fd NEW: GNU ext.
718 cacos NEW: ISO C 9x
719 cacosf NEW: ISO C 9x
720 cacosh NEW: ISO C 9x
721 cacoshf NEW: ISO C 9x
722 cacoshl NEW: ISO C 9x
723 cacosl NEW: ISO C 9x
724 capget NEW: kernel
725 capset NEW: kernel
726 carg NEW: ISO C 9x
727 cargf NEW: ISO C 9x
728 cargl NEW: ISO C 9x
729 casin NEW: ISO C 9x
730 casinf NEW: ISO C 9x
731 casinh NEW: ISO C 9x
732 casinhf NEW: ISO C 9x
733 casinhl NEW: ISO C 9x
734 casinl NEW: ISO C 9x
735 catan NEW: ISO C 9x
736 catanf NEW: ISO C 9x
737 catanh NEW: ISO C 9x
738 catanhf NEW: ISO C 9x
739 catanhl NEW: ISO C 9x
740 catanl NEW: ISO C 9x
741 cbc_crypt NEW: Secure RPC
742 ccos NEW: ISO C 9x
743 ccosf NEW: ISO C 9x
744 ccosh NEW: ISO C 9x
745 ccoshf NEW: ISO C 9x
746 ccoshl NEW: ISO C 9x
747 ccosl NEW: ISO C 9x
748 cexp NEW: ISO C 9x
749 cexpf NEW: ISO C 9x
750 cexpl NEW: ISO C 9x
751 cimag NEW: ISO C 9x
752 cimagf NEW: ISO C 9x
753 cimagl NEW: ISO C 9x
754 clearerr_locked REMOVED
755 clntunix_create NEW: sunrpc ext
756 clog NEW: ISO C 9x
757 clog10 NEW: ISO C 9x
758 clog10f NEW: ISO C 9x
759 clog10l NEW: ISO C 9x
760 clogf NEW: ISO C 9x
761 clogl NEW: ISO C 9x
762 conj NEW: ISO C 9x
763 conjf NEW: ISO C 9x
764 conjl NEW: ISO C 9x
765 cpow NEW: ISO C 9x
766 cpowf NEW: ISO C 9x
767 cpowl NEW: ISO C 9x
768 cproj NEW: ISO C 9x
769 cprojf NEW: ISO C 9x
770 cprojl NEW: ISO C 9x
771 creal NEW: ISO C 9x
772 crealf NEW: ISO C 9x
773 creall NEW: ISO C 9x
774 creat64 NEW: LFS
775 csin NEW: ISO C 9x
776 csinf NEW: ISO C 9x
777 csinh NEW: ISO C 9x
778 csinhf NEW: ISO C 9x
779 csinhl NEW: ISO C 9x
780 csinl NEW: ISO C 9x
781 csqrt NEW: ISO C 9x
782 csqrtf NEW: ISO C 9x
783 csqrtl NEW: ISO C 9x
784 ctan NEW: ISO C 9x
785 ctanf NEW: ISO C 9x
786 ctanh NEW: ISO C 9x
787 ctanhf NEW: ISO C 9x
788 ctanhl NEW: ISO C 9x
789 ctanl NEW: ISO C 9x
790 des_setparity NEW: Secure RPC
791 ecb_crypt NEW: Secure RPC
792 endutxent NEW: Unix98
793 exp10 NEW: ISO C 9x
794 exp10f NEW: ISO C 9x
795 exp10l NEW: ISO C 9x
796 exp2 NEW: ISO C 9x
797 exp2f NEW: ISO C 9x
798 exp2l NEW: ISO C 9x
799 fattach NEW: STREAMS
800 fdetach NEW: STREAMS
801 fdim NEW: ISO C 9x
802 fdimf NEW: ISO C 9x
803 fdiml NEW: ISO C 9x
804 feclearexcept NEW: ISO C 9x
805 fegetenv NEW: ISO C 9x
806 fegetexceptflag NEW: ISO C 9x
807 fegetround NEW: ISO C 9x
808 feholdexcept NEW: ISO C 9x
809 feof_locked REMOVED
810 feraiseexcept NEW: ISO C 9x
811 ferror_locked REMOVED
812 fesetenv NEW: ISO C 9x
813 fesetexceptflag NEW: ISO C 9x
814 fesetround NEW: ISO C 9x
815 fetestexcept NEW: ISO C 9x
816 feupdateenv NEW: ISO C 9x
817 fflush_locked REMOVED
818 ffsl NEW: GNU ext.
819 ffsll NEW: GNU ext.
820 fgetpos64 NEW: LFS
821 fgets_unlocked NEW: GNU ext.
822 fileno_locked REMOVED
823 fma NEW: ISO C 9x
824 fmaf NEW: ISO C 9x
825 fmal NEW: ISO C 9x
826 fmax NEW: ISO C 9x
827 fmaxf NEW: ISO C 9x
828 fmaxl NEW: ISO C 9x
829 fmin NEW: ISO C 9x
830 fminf NEW: ISO C 9x
831 fminl NEW: ISO C 9x
832 fmtmsg NEW: Unix98
833 fopen64 NEW: LFS
834 fputc_locked REMOVED
835 fputs_unlocked NEW: GNU ext.
836 fread_unlocked NEW: GNU ext.
837 freopen64 NEW: LFS
838 fseeko NEW: Unix98
839 fsetpos64 NEW: LFS
840 fstatfs64 NEW: LFS
841 fstatvfs NEW: Unix98
842 fstatvfs64 NEW: LFS
843 ftello NEW: Unix98
844 ftello64 NEW: LFS
845 ftruncate64 NEW: LFS
846 ftw64 NEW: LFS
847 fwrite_unlocked NEW: GNU ext.
848 gai_strerror NEW: IPv6
849 gamma_r REMOVED
850 gammaf_r REMOVED
851 gammal_r REMOVED
852 getchar_locked REMOVED
853 getdate NEW: Unix98
854 getdate_err NEW: Unix98
855 getdate_r NEW: GNU ext.
856 getmsg NEW: STREAMS
857 getnameinfo NEW: IPv6
858 getnetname NEW: Secure RPC
859 getpmsg NEW: STREAMS
860 getpt NEW: Unix98 PTY
861 getrlimit64 NEW: LFS
862 getutxent NEW: Unix98
863 getutxid NEW: Unix98
864 getutxline NEW: Unix98
865 glob64 NEW: GNU ext.
866 globfree64 NEW: GNU ext.
867 gnu_get_libc_release NEW: GNU ext.
868 gnu_get_libc_version NEW: GNU ext.
869 grantpt NEW: Unix98 PTY
870 host2netname NEW: Secure RPC
871 iconv NEW: iconv
872 iconv_close NEW: iconv
873 iconv_open NEW: iconv
874 if_freenameindex NEW: IPv6
875 if_indextoname NEW: IPv6
876 if_nameindex NEW: IPv6
877 if_nametoindex NEW: IPv6
878 in6addr_any NEW: IPv6
879 in6addr_loopback NEW: IPv6
880 inet6_isipv4mapped NEW: IPv6
881 isastream NEW: STREAMS
882 iswblank NEW: GNU ext.
883 key_decryptsession NEW: Secure RPC
884 key_decryptsession_pk NEW: Secure RPC
885 key_encryptsession NEW: Secure RPC
886 key_encryptsession_pk NEW: Secure RPC
887 key_gendes NEW: Secure RPC
888 key_get_conv NEW: Secure RPC
889 key_secretkey_is_set NEW: Secure RPC
890 key_setnet NEW: Secure RPC
891 key_setsecret NEW: Secure RPC
892 llrint NEW: ISO C 9x
893 llrintf NEW: ISO C 9x
894 llrintl NEW: ISO C 9x
895 llround NEW: ISO C 9x
896 llroundf NEW: ISO C 9x
897 llroundl NEW: ISO C 9x
898 log2 NEW: ISO C 9x
899 log2f NEW: ISO C 9x
900 log2l NEW: ISO C 9x
901 lrint NEW: ISO C 9x
902 lrintf NEW: ISO C 9x
903 lrintl NEW: ISO C 9x
904 lround NEW: ISO C 9x
905 lroundf NEW: ISO C 9x
906 lroundl NEW: ISO C 9x
907 lseek64 NEW: LFS
908 makecontext NEW: Unix98
909 mempcpy NEW: GNU ext.
910 mmap64 NEW: LFS
911 moncontrol REMOVED
912 modify_ldt NEW: kernel
913 nan NEW: ISO C 9x
914 nanf NEW: ISO C 9x
915 nanl NEW: ISO C 9x
916 nearbyint NEW: ISO C 9x
917 nearbyintf NEW: ISO C 9x
918 nearbyintl NEW: ISO C 9x
919 netname2host NEW: Secure RPC
920 netname2user NEW: Secure RPC
921 nexttoward NEW: ISO C 9x
922 nexttowardf NEW: ISO C 9x
923 nexttowardl NEW: ISO C 9x
924 nftw NEW: Unix98
925 nftw64 NEW: LFS
926 open64 NEW: LFS
927 passwd2des NEW: Secure RPC
928 pow10 NEW: GNU ext.
929 pow10f NEW: GNU ext.
930 pow10l NEW: GNU ext.
931 pread NEW: Unix98
932 pread64 NEW: LFS
933 printf_size NEW: GNU ext.
934 printf_size_info NEW: GNU ext.
935 profil_counter REMOVED
936 pthread_mutexattr_getkind_np REPLACED
937 pthread_mutexattr_setkind_np REPLACED
938 ptsname NEW: Unix98 PTY
939 ptsname_r NEW: Unix98 PTY
940 putc_locked REMOVED
941 putchar_locked REMOVED
942 putgrent NEW: GNU ext.
943 putmsg NEW: STREAMS
944 putpmsg NEW: STREAMS
945 pututxline NEW: Unix98
946 pwrite NEW: Unix98
947 pwrite64 NEW: LFS
948 readdir64 NEW: LFS
949 readdir64_r NEW: LFS
950 remquo NEW: ISO C 9x
951 remquof NEW: ISO C 9x
952 remquol NEW: ISO C 9x
953 round NEW: ISO C 9x
954 roundf NEW: ISO C 9x
955 roundl NEW: ISO C 9x
956 rtime NEW: GNU ext.
957 scalbln NEW: ISO C 9x
958 scalblnf NEW: ISO C 9x
959 scalblnl NEW: ISO C 9x
960 scandir64 NEW: LFS
961 sendfile NEW: kernel
962 setcontext NEW: Unix98
963 setrlimit64 NEW: LFS
964 setutxent NEW: Unix98
965 sighold NEW: Unix98
966 sigignore NEW: Unix98
967 sigqueue NEW: POSIX.1b
968 sigrelse NEW: Unix98
969 sigset NEW: POSIX.1b
970 sigtimedwait NEW: POSIX.1b
971 sigwaitinfo NEW: POSIX.1b
972 sincos NEW: GNU ext.
973 sincosf NEW: GNU ext.
974 sincosl NEW: GNU ext.
975 statfs64 NEW: LFS
976 statvfs NEW: Unix98
977 statvfs64 NEW: LFS
978 strcasestr NEW: GNU ext.
979 strtoimax NEW: ISO C 9x
980 strtoumax NEW: ISO C 9x
981 strverscmp NEW: GNU ext.
982 svcauthdes_stats NEW: Secure RPC
983 svcunix_create NEW: sunrpc etx
984 svcunixfd_create NEW: sunrpc ext
985 swapcontext NEW: Unix98
986 tcgetsid NEW: Unix98 PTY
987 tdestroy NEW: GNU ext.
988 tgamma NEW: ISO C 9x
989 tgammaf NEW: ISO C 9x
990 tgammal NEW: ISO C 9x
991 tmpfile64 NEW: LFS
992 trunc NEW: ISO C 9x
993 truncate64 NEW: LFS
994 truncf NEW: ISO C 9x
995 truncl NEW: ISO C 9x
996 umount2 NEW: kernel
997 unlockpt NEW: Unix98 PTY
998 updwtmpx NEW: Unix98
999 user2netname NEW: Secure RPC
1000 utmpxname NEW: Unix98
1001 versionsort NEW: GNU ext.
1002 versionsort64 NEW: GNU ext.
1003 waitid NEW: Unix98
1004 wcscasecmp NEW: GNU ext.
1005 wcsncasecmp NEW: GNU ext.
1006 wcsnlen NEW: GNU ext.
1007 wcstoimax NEW: ISO C 9x
1008 wcstoll NEW: ISO C 9x
1009 wcstoull NEW: ISO C 9x
1010 wcstoumax NEW: ISO C 9x
1011 wcswcs NEW: Unix98
1012 wordexp NEW: POSIX.2
1013 wordfree NEW: POSIX.2
1014 write_profiling REMOVED
1015 xdecrypt NEW: Secure RPC
1016 xdr_authdes_cred NEW: Secure RPC
1017 xdr_authdes_verf NEW: Secure RPC
1018 xdr_cryptkeyarg NEW: Secure RPC
1019 xdr_cryptkeyarg2 NEW: Secure RPC
1020 xdr_cryptkeyres NEW: Secure RPC
1021 xdr_getcredres NEW: Secure RPC
1022 xdr_key_netstarg NEW: Secure RPC
1023 xdr_key_netstres NEW: Secure RPC
1024 xdr_keybuf NEW: Secure RPC
1025 xdr_keystatus NEW: Secure RPC
1026 xdr_netnamestr NEW: Secure RPC
1027 xdr_sizeof NEW: Secure RPC
1028 xdr_unixcred NEW: sunrpc ext
1029 xencrypt NEW: Secure RPC
1030 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1031 \f
1032 Version 2.0.6
1034 * more bug fixes
1036 \f
1037 Version 2.0.5
1039 * more bug fixes
1041 * inet_ntoa is thread-safe
1043 * updwtmp is moved from libutil to libc
1045 * rewrite of cbrt function
1047 * update of timezone data
1048 \f
1049 Version 2.0.4
1051 * more bug fixes
1052 \f
1053 Version 2.0.3
1055 * more bug fixes
1056 \f
1057 Version 2.0.2
1059 * more bug fixes
1061 * add atoll function
1063 * fix complex problems in Berkeley DB code
1065 * fix math functions
1066 \f
1067 Version 2.0.1
1069 * fixed lots of header problems (especially Linux/GNU specific)
1071 * dynamic loader preserves all registers
1073 * Roland McGrath provided support for handling of auxiliary objects in
1074 the ELF dynamic loader.
1076 * support for parallel builds is improved
1077 \f
1078 Version 2.0
1080 * GNU extensions are no longer declared by default. To enable them you
1081 must define the macro `_GNU_SOURCE' in your program or compile with
1082 `-D_GNU_SOURCE'.
1084 * The library has changed from using GNU ld symbol aliases to using weak
1085 symbols where available. The ELF object file format supports weak
1086 symbols; GNU ld also supports weak symbols in the a.out format. (There
1087 is also now support for other GNU ld extensions in ELF. Use the
1088 `--with-elf' option to configure to indicate you have ELF, and
1089 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1090 of many files which contained only symbol aliases, reducing the size of
1091 the source and the compiled library; many other files were renamed to
1092 less cryptic names previously occupied by the symbol alias files.
1093 There is a new header file <elf.h> for programs which operate on
1094 files in the ELF format.
1096 * Converted to Autoconf version 2, so `configure' has more options.
1097 Run `configure --help' to see the details.
1099 * The library can now be configured to build profiling, highly-optimized
1100 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1101 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1102 `configure' enable building these extra libraries. The shared library is
1103 built by default when using both ELF and GNU ld. When shared libraries
1104 are enabled, the new library `-ldl' is available for arbitrary run-time
1105 loading of shared objects; its interface is defined in <dlfcn.h>. The
1106 new header file <link.h> gives access to the internals of the run-time
1107 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1108 application of same name on other systems and it provides information
1109 about dynamically linked binaries.
1111 * The C library now provides the run-time support code for profiling
1112 executables compiled with `-pg'. Programs can control the profiling code
1113 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1114 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1115 the support for this file format was contributed by David Mosberger-Tang.
1117 * The math code has been replaced with a math library based on fdlibm from
1118 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1119 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1120 functions. The math functions now reside in a separate library, so
1121 programs using them will need to use `-lm' their linking commands.
1123 * John C. Bowman contributed optimized ix87 assembler inline functions.
1125 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1126 mechanism similar to that found in Solaris 2. This is now used for the
1127 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1128 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1129 file controls what services are used for each individual database. This
1130 works by loading shared libraries with names specified in `nsswitch.conf',
1131 so service modules can be changed or added at any time without even
1132 relinking any program. Currently there are the file, db, and NIS based
1133 NSS services available.
1135 * The new functions `strtoq' and `strtouq' parse integer values from
1136 strings, like `strtol' and `strtoul', but they return `long long int' and
1137 `unsigned long long int' values, respectively (64-bit quantities).
1139 * The new functions `strtof' and `strtold' parse floating-point values from
1140 strings, like `strtod', but they return `float' and `long double' values,
1141 respectively (on some machines `double' and `long double' are the same).
1143 * Ulrich Drepper has contributed new implementations of the floating-point
1144 printing and reading code used in the `printf' family of functions and
1145 `strtod', `strtof', and `strtold'. These new functions are perfectly
1146 accurate, and much faster than the old ones.
1148 * The implementation of the POSIX locale model was completely rewritten by
1149 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1150 to compile the POSIX locale definition.
1152 * The former dummy implementations of the strcoll and strxfrm function are
1153 now replaced by fully functional code contributed by Ulrich Drepper. The
1154 collation information comes from the POSIX locale definitions.
1156 * The new header <langinfo.h> defines an interface for accessing
1157 various locale-dependent data (using the locale chosen with `setlocale').
1159 * Ulrich Drepper has contributed a new suite of functions for operation on
1160 wide-character and multibyte-character strings, in <wchar.h>;
1161 and classification and case conversion of wide characters, in <wctype.h>.
1162 These new functions are conforming to the ISO C, Amendement 1 specification.
1164 * There is now a second implementation of the standard I/O library available.
1165 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1166 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1168 * You can now use positional parameter specifications in format strings
1169 for the `printf' and `scanf' families of functions. For example,
1170 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1171 ``Number 6, Mr Jones''. This is mainly useful when providing different
1172 format strings for different languages, whose grammars may dictate
1173 different orderings of the values being printed. To support this
1174 feature, the interface for `register_printf_handler' has changed; see
1175 the header file <printf.h> for details.
1177 * The `printf' and `scanf' families of functions now understand a new
1178 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1179 to group numbers as indicated by the locale; for `scanf' and friends, this
1180 says to accept as valid only a number with all the proper grouping
1181 separators in the right places. In the default "C" locale, numbers are
1182 not grouped; but locales for specific countries will define the usual
1183 conventions (i.e. separate thousands with `,' in the US locale).
1185 * The pgrp functions have been regularized, slightly incompatibly but much
1186 less confusingly. The core functions are now `getpgid' and `setpgid',
1187 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1188 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1189 provided for compatibility. There is no longer an incompatible `getpgrp'
1190 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1192 * The new header file <fts.h> and suite of functions simplify programs that
1193 operate on directory trees. This code comes from 4.4 BSD.
1195 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1196 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1197 NSS scheme used in glibc.
1199 * There is a new malloc debugging hook `__memalign_hook'.
1201 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1202 `unsigned int' in <sys/types.h>. These are for compatibility only and
1203 their use is discouraged.
1205 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1206 done differently, so that it works even without GNU ld.
1208 * New function `euidaccess' checks allowed access to a file like `access',
1209 but using the effective IDs instead of the real IDs.
1211 * The time zone data files have been updated for the latest and greatest
1212 local time conventions of the countries of the world.
1214 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1215 see <dirent.h>.
1217 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1218 for formatting floating-point numbers. They are provided only for
1219 compatibility; new programs should use `sprintf' instead. There are
1220 also equivalent function for the `long double' floating-point type and
1221 all functions also exist in a reentrant form.
1223 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1224 functions for maintaining the login-record files (primarily of use to
1225 system programs such as `login'), and convenient functions for
1226 allocating and initializing a pseudo-terminal (pty) device.
1228 * Ulrich Drepper has contributed new support for System V style
1229 shared memory and IPC on systems that support it.
1231 * Ulrich Drepper has contributed several miscellaneous new functions found
1232 in System V: The `hsearch' family of functions provide an effective
1233 implementation of hash tables; `a64l' and `l64a' provide a very simple
1234 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1235 number generator.
1237 * Ulrich Drepper has contributed new reentrant counterparts for the
1238 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1240 * Ulrich Drepper has contributed new, highly-optimized versions of several
1241 string functions for the i486/Pentium family of processors.
1243 * Ulrich Drepper has updated the Linux-specific code, based largely
1244 on work done in Hongjiu Lu's version of GNU libc for Linux.
1245 The GNU library now supports Linux versions 2.0.10 and later,
1246 using the ELF object file format (i[3456]86-*-linux).
1248 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1250 * David Mosberger-Tang and Richard Henderson have ported the C library
1251 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1252 dynamic linking support for ELF/Alpha.
1254 * Richard Henderson contributed several Alpha optimized assembler function
1255 for arithmetic and string handling.
1257 * Ulrich Drepper has contributed a new set of message catalog functions to
1258 support multiple languages using the <libintl.h> interface, for use with
1259 his new package GNU gettext. Translation volunteers have contributed
1260 catalogs of the library's messages in Spanish, German, and Korean.
1262 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1263 program and the `catgets' function for reading the catalog files it
1264 creates. (The <libintl.h> interface is preferred; we include the
1265 <nl_types.h> interface using `catgets' only for source compatibility with
1266 programs already written to use it.)
1268 * New header file <values.h> gives SVID-compatible names for <limits.h>
1269 constants.
1271 * Various new macros, declarations, and small header files for compatibility
1272 with 4.4 BSD.
1274 * New function `group_member' is a convenient way to check if a process has
1275 a given effective group ID.
1277 * When using GCC 2.7 and later, the socket functions are now declared in a
1278 special way so that passing an argument of type `struct sockaddr_in *',
1279 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1280 `struct sockaddr *' type, does not generate a type-clash warning.
1282 * New function `error' declared in header file <error.h> is a convenient
1283 function for printing error messages and optionally exiting; this is the
1284 canonical function used in GNU programs. The new functions `err', `warn',
1285 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1286 doing the same thing.
1288 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1289 POSIX.2 `glob' function to do ~ and {...} expansion.
1291 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1292 `clearenv' which is used in POSIX.9 is also available.
1294 * New function `getsid' returns session ID number on systems that support it.
1296 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1297 files <db.h> and <mpool.h> provide a rich set of functions for several
1298 types of simple databases stored in memory and in files, and <ndbm.h> is
1299 an old `ndbm'-compatible interface using the `db' functions. Link with
1300 `-ldb' to get these functions.
1302 * New macro `strdupa' copies a string like `strdup', but uses local stack
1303 space from `alloca' instead of dynamic heap space from `malloc'.
1305 * New function `strnlen' is like `strlen' but searches only a given maximum
1306 number of characters for the null terminator. `stpncpy', `strndup' and
1307 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1308 function.
1310 * New function `statfs' in header <sys/statfs.h>.
1312 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1313 provide convenient functions for operating on blocks of null-terminated
1314 strings.
1316 * A new suite of functions in <utmp.h> handle all the details of reading
1317 and writing the utmp file.
1319 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1320 Thorsten Kukuk.
1322 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1323 completely POSIX compliant and also implemented the extended functionality
1324 to handle alternate digit representation and alternate era date formats.
1326 * Ulrich Drepper provided an implementation of the `strptime' function
1327 defined in XPG4.2 which transforms a string into a `struct tm' value.
1329 * Paul Eggert provided the tzselect shell script as part of the timezone
1330 code. The shell script makes it easy to select the correct timezone
1331 specification.
1333 * The implementation of the malloc family of functions is completely replaced
1334 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1335 The implementation uses the mmap function (if available) and it is
1336 optimized for the use in multi threaded programs.
1338 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1339 functions. This new functionality is usable by specifying a special
1340 salt string and it is compatible with implementation on *BSD systems.
1342 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1343 `getsubopt' to handle second level command line options, `bsd_signal'
1344 to access BSD style `signal' functionality, the obsolete `regexp' style
1345 expression matcher.
1347 * the `lchown' function is available on system which support this
1348 functionality.
1350 * The implementation of the shadow password handling function was contributed
1351 by Ulrich Drepper.
1353 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1355 * POSIX.1g support was added. The <sys/select.h> header is available,
1356 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1357 implementation of `getaddrinfo'.
1358 \f
1359 Version 1.09
1361 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1363 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1364 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1366 * The new function `daemon' from 4.4 BSD is useful for server programs that
1367 want to put themselves in the background.
1369 * Joel Sherrill has contributed support for several standalone boards that
1370 run without an operating system.
1372 * `printf', `scanf' and friends now accept a `q' type modifier for long
1373 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1375 * All of the code taken from BSD (notably most of the math and networking
1376 routines) has been updated from the BSD 4.4-Lite release.
1378 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1380 * The new functions `getdomainname' and `setdomainname' fetch or change the
1381 YP/NIS domain name. These are system calls which exist on systems which
1382 have YP (aka NIS).
1384 * The time zone data files have been updated for the latest international
1385 conventions.
1387 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1388 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1389 \f
1390 Version 1.08
1392 * The C library now includes support for Sun RPC, from Sun's free
1393 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1394 are included. (There is still no support for YP.)
1396 * Tom Quinn has contributed a port of the C library to SGI machines running
1397 Irix 4 (mips-sgi-irix4).
1399 * The new `lockf' function is a simplified interface to the locking
1400 facilities of `fcntl', included for compatibility.
1402 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1404 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1406 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1407 compatibility.
1409 * The error message printed by `assert' for a failed assertion now includes
1410 the name of the program (if using GNU ld) and the name of the calling
1411 function (with versions of GCC that support this).
1413 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1415 * The library now includes the <sys/mman.h> header file and memory
1416 management functions `mmap', `munmap', `mprotect', `msync', and
1417 `madvise', on systems that support those facilities.
1419 * The interface for `mcheck' has changed slightly: the function called to
1420 abort the program when an allocation inconsistency is detected now takes
1421 an argument that indicates the type of failure. The new function
1422 `mprobe' lets you request a consistency check for a particular block at
1423 any time (checks are normally done only when you call `free' or `realloc'
1424 on a block).
1426 * It is now possible to easily cross-compile the C library, building on one
1427 system a library to run on another machine and/or operating system. All
1428 you need to do is set the variable `HOST_CC' in `configparms' to the
1429 native compiler for programs to run on the machine you are building on (a
1430 few generator programs are used on Unix systems); set `CC' to the
1431 cross-compiler.
1433 * The new function `fexecve' (only implemented on the GNU system) executes
1434 a program file given a file descriptor already open on the file.
1435 \f
1436 Version 1.07
1438 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1439 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1441 * You can set the variable `libprefix' in `configparms' to specify a prefix
1442 to be prepended to installed library files; this makes it easy to install
1443 the GNU C library to be linked as `-lgnuc' or whatever.
1445 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1446 copies a limited number of characters from a string, and returns the
1447 address of the last character written.
1449 * You no longer need to check for whether the installed `stddef.h' is
1450 compatible with the GNU C library. configure now checks for you.
1452 * You can now define a per-stream `fileno' function to convert the
1453 stream's cookie into an integral file descriptor.
1455 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1456 allocates zero bytes of storage, and returns a unique pointer which
1457 you can pass to `realloc' or `free'. The behavior is undefined if
1458 you dereference this pointer.
1460 * The C library now runs on Sony NEWS m68k machines running either
1461 NewsOS 3 or NewsOS 4.
1463 * The new `syscall' function is a system-dependent primitive function
1464 for invoking system calls. It has the canonical behavior on Unix
1465 systems, including unreliable return values for some calls (such as
1466 `pipe', `fork' and `getppid').
1468 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1469 to `EAGAIN', which is the preferred name. On systems whose kernels
1470 use two distinct codes, the C library now translates EWOULDBLOCK to
1471 EAGAIN in every system call function.
1472 \f
1473 Version 1.06
1475 * The GNU C Library Reference Manual is now distributed with the library.
1476 `make dvi' will produce a DVI file of the printed manual.
1477 `make info' will produce Info files that you can read on line using C-h i
1478 in Emacs or the `info' program.
1479 Please send comments on the manual to bug-glibc-manual@gnu.org.
1481 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1483 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1485 * Jason Merrill has contributed a port to the Sequent Symmetry running
1486 Dynix version 3 (i386-sequent-dynix).
1488 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1489 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1491 * New function `memory_warnings' lets you arrange to get warnings when
1492 malloc is running out of memory to allocate, like Emacs gives you.
1494 * The C library now contains the relocating allocator used in Emacs 19 for
1495 its editing buffers. This allocator (ralloc) minimizes allocation
1496 overhead and fragmentation by moving allocated regions around whenever it
1497 needs to. You always refer to a ralloc'd region with a "handle" (a
1498 pointer to a pointer--an object of type `void **').
1500 * There is a new `printf' format: `%m' gives you the string corresponding
1501 to the error code in `errno'.
1503 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1504 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1505 pass, the `a' modifier says to fill in a `char **' you pass with a
1506 malloc'd string.
1508 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1509 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1510 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1512 * `mkstemp' is a traditional Unix function to atomically create and open a
1513 uniquely-named temporary file.
1514 \f
1515 Version 1.05
1517 * The standard location for the file that says what the local timezone is
1518 has changed again. It is now `/usr/local/etc/localtime' (or more
1519 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1521 * The distribution no longer contains any files with names longer than 14
1522 characters.
1524 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1525 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1527 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1528 \f
1529 Version 1.04
1531 * The configuration process has changed quite a bit. The `configure'
1532 script is now used just like the configuration scripts for other GNU
1533 packages. The `sysdeps' directory hierarchy is much rearranged.
1534 The file `INSTALL' explains the new scheme in detail.
1536 * The header files no longer need to be processed into ANSI C and
1537 traditional C versions. There is just one set of files to install, and
1538 it will work with ANSI or old C compilers (including `gcc -traditional').
1540 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1541 MIPS DECStation running Ultrix 4.
1543 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1544 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1545 made itself into a shared library.
1547 * Yet further improved support for the i386, running 4.3 BSD-like systems
1548 (such as Mach 3 with the Unix single-server), or System V.
1550 * New function `strncasecmp' to do case-insensitive string comparison
1551 with limited length.
1553 * New function `strsep' is a reentrant alternative to `strtok'.
1555 * New functions `scandir' and `alphasort' for searching directories.
1557 * New function `setenv' is a better interface to `putenv'.
1559 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1560 function for traversing a directory tree.
1562 * The GNU obstack package is now also part of the C library.
1563 The new function `open_obstack_stream' creates a stdio stream that
1564 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1565 formatted output directly to an obstack.
1567 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1568 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1570 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1572 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1573 things to your strings.
1575 * There are some new test programs: test-fseek, testmb, and testrand.
1577 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1578 These ports are not finished, but are a good starting place for really
1579 supporting those systems.
1581 * `/etc/localtime' is now the standard location for the file that says what
1582 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1583 This follows the general principle that `/etc' is the place for all local
1584 configuration files.
1586 * The C library header files now use `extern "C"' when used by the C++
1587 compiler, so the C library should now work with C++ code.
1589 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1590 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
1591 in <strings.h>.)
1593 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1594 function which uses the `merge sort' algorithm, and is said to be
1595 significantly faster than the old GNU `qsort' function. Merge sort is
1596 now the standard `qsort' function. The new algorithm can require a lot
1597 of temporary storage; so, the old sorting function is called when the
1598 required storage is not available.
1600 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1601 provides the Unix `crypt' function, plus some other entry points.
1603 * The code and header files taken from 4.4 BSD have been updated with the
1604 latest files released from Berkeley.
1605 \f
1606 ----------------------------------------------------------------------
1607 Copyright information:
1609 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1610 Free Software Foundation, Inc.
1612 Permission is granted to anyone to make or distribute verbatim copies
1613 of this document as received, in any medium, provided that the
1614 copyright notice and this permission notice are preserved,
1615 thus giving the recipient permission to redistribute in turn.
1617 Permission is granted to distribute modified versions
1618 of this document, or of portions of it,
1619 under the above conditions, provided also that they
1620 carry prominent notices stating who last changed them.
1621 \f
1622 Local variables:
1623 version-control: never
1624 End: