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1 GNU C Library NEWS -- history of user-visible changes. 2008-5-14
2 Copyright (C) 1992-2007, 2008 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 2.9
10 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
11 up at the same time. Implemented by Ulrich Drepper.
13 * TLS descriptors for LD and GD on x86 and x86-64.
14 Implemented by Alexandre Oliva.
16 * getaddrinfo now handles DCCP and UDPlite.
17 Implemented by Ulrich Drepper.
18 \f
19 Version 2.8
21 * New locales: bo_CN, bo_IN.
23 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
25 * Sorting rules for some Indian languages (Devanagari and Gujarati).
26 Implemented by Pravin Satpute.
28 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
30 * nscd caches now all timeouts for DNS entries
31 Implemented by Ulrich Drepper.
33 * nscd is more efficient and wakes up less often.
34 Implemented by Ulrich Drepper.
36 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
37 vdprintf, and obstack_vprintf.
38 Implemented by Jakub Jelinek.
40 * Faster memset for x86-64.
41 Implemented by Harsha Jagasia and H.J. Lu.
43 * Faster memcpy on x86.
44 Implemented by Ulrich Drepper.
46 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
47 Implemented by Ulrich Drepper.
49 * Faster sqrt and sqrtf implemention for some PPC variants.
50 Implemented by Stephen Munroe.
51 \f
52 Version 2.7
54 * More checking functions: fread, fread_unlocked, open*, mq_open.
55 Implemented by Jakub Jelinek and Ulrich Drepper.
57 * Extend fortification to C++. Implemented by Jakub Jelinek.
59 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
60 by not recognizing 'a' as a modifier when those specs are requested.
61 Implemented by Jakub Jelinek.
63 * PPC optimizations to math and string functions.
64 Implemented by Steven Munroe.
66 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
67 options to be passed. Implemented by Ulrich Drepper.
69 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
71 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
72 Implemented by Ulrich Drepper.
74 * Handle private futexes in the NPTL implementation.
75 Implemented by Jakub Jelinek and Ulrich Drepper.
77 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
78 Implemented by Roland McGrath and Ulrich Drepper.
80 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
82 * SHA-256 and SHA-512 based password encryption.
83 Implemented by Ulrich Drepper.
85 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
86 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
87 yo_NG.
89 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
90 Implemented by Ulrich Drepper.
91 \f
92 Version 2.6
94 * New Linux interfaces: epoll_pwait, sched_getcpu.
96 * New generic interfaces: strerror_l.
98 * nscd can now cache the services database. Implemented by Ulrich Drepper.
100 \f
101 Version 2.5
103 * For Linux, the sorting of addresses returned by getaddrinfo now also
104 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
105 Implemented by Ulrich Drepper.
107 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
108 Implemented by Ulrich Drepper.
110 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
112 * New iconv module for MIK. Contributed by Alexander Shopov.
114 * For sites with broken group and/or passwd database, the auto-propagate
115 option of nscd can prevent creating ID lookup entries from the results
116 of a name lookup and vice versa. This usually is no problem but some
117 site might have problems with the default behavior.
118 Implemented by Ulrich Drepper.
120 * Iterating over entire database in NIS can be slow. With the
121 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
122 to trade time for memory. The entire database will be read at once.
123 Implemented by Ulrich Drepper.
125 * The interfaces introduced in RFC 3542 have been implemented by
126 Ulrich Drepper.
128 * Support for the new ELF hash table format was added by Ulrich Drepper.
130 * Support for priority inheritance mutexes added by Jakub Jelinek and
131 Ulrich Drepper.
133 * Support for priority protected mutexes added by Jakub Jelinek.
135 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
136 or_IN, csb_PL, fy_NL, sr_ME.
137 \f
138 Version 2.4
140 * More overflow detection functions.
142 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
143 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
145 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
146 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
147 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
148 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
149 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
150 by Masahide Washizawa.
152 * It is now possible to install audit libraries for the dynamic linker using
153 LD_AUDIT. Implemented by Ulrich Drepper.
155 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
156 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
157 For a libc and libpthread that works well on Linux 2.4 kernels, we
158 recommend using the stable 2.3 branch.
160 * The new function open_wmemstream acts like open_memstream,
161 but uses a wchar_t wide character buffer.
163 * The new function ppoll is an improved version of poll, similar to pselect.
165 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
166 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
167 renameat, unlinkat, linkat, symlinkat, readlinkat.
169 * New Linux kernel system calls: unshare,
170 inotify_init, inotify_add_watch, inotify_rm_watch.
172 * The euidaccess function is now also known by the alias eaccess,
173 for compatibility with some other systems.
175 * Timezone data updated to 2006b version.
176 \f
177 Version 2.3.6
179 * The following bugs are resolved with this release:
181 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
182 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
183 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
184 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
185 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
186 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
188 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
190 * As of this release, GCC 4 can be used to compile the C Library.
192 * Timezone data updated to 2005m version.
193 \f
194 Version 2.3.5
196 * The following bugs are resolved with this release:
198 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
199 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
200 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
201 777, 787, 821, 822, 823, 825
203 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
204 \f
205 Version 2.3.4
207 * Support for RFC 3678. Real implementations exist only for Linux so far.
208 Implemented by Ulrich Drepper.
210 * nscd can now cache entries persistently. Expiring entries are reloaded.
211 For speedups the cache can be shared in memory with client processes.
212 Implemented by Ulrich Drepper.
214 * nscd can now perform SELinux checks.
215 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
217 * getaddrinfo queries are now cached. Canonical name lookup is performed
218 efficiently.
219 Implemented by Ulrich Drepper.
221 * The nothrow function attribute is used when headers are used by gcc when
222 compiling C code. This can avoid significant amounts of exception
223 handling data.
225 * The malloc functions perform more error checking and are stricter when
226 it comes to reacting on errors. The default action is to terminate
227 the process after showing an error message. Implemented by Ulrich Drepper.
229 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
230 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
232 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
233 namespaces using the new function dlmopen(). This feature is of course,
234 like most other dynamic loading functionality, not available in statically
235 linked applications. Implemented by Ulrich Drepper.
237 * Low-overhead boundary checking variants of string and some stdio functions
238 were added. These are to be used in conjunction with a gcc patch by
239 Jakub Jelinek which adds calls to these functions if possible.
240 Implemented by Jakub Jelinek and Ulrich Drepper.
242 * Old code for several operating systems and machine architectures that
243 have not been in working condition in a long time have been removed from
244 the main source tree maintained by the GNU C Library's maintainers.
245 These files are now reside in the separate `ports' source module
246 that is usable as an add-on when building the library.
247 \f
248 Version 2.3.3
250 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
251 interrogate the dynamic linker, compatible with the Solaris interface.
253 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
254 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
256 * getifaddrs now uses the netlink interface on Linux to get its information.
257 Implemented by Thorsten Kukuk.
259 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
260 Implemented by Ulrich Drepper.
262 * support for non-executable stacks on x86 has been added. Changes mostly
263 by Roland McGrath.
265 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
266 and Ulrich Drepper.
268 * getaddrinfo now performs destination address selection according to
269 RFC 3484.
270 \f
271 Version 2.3.2
273 * Thread-safe interfaces for many functions that access locale data
274 were added in version 2.3, but these features were omitted from NEWS.
275 Many functions have variants with an `_l' suffix that take a `locale_t'
276 object as a parameter rather than consulting the current locale.
277 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
278 create and maintain `locale_t' objects. Additionally, the new function
279 `uselocale' sets "the current locale" (as used by functions not so
280 parameterized) set for an individual thread. These features were added
281 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
283 * The functions getresuid, getresgid, setresuid, and setresgid, which
284 have long been available on Linux, are now declared in <unistd.h>
285 and are now also available on the Hurd.
287 * ELF thread-local storage support (TLS) now works on x86-64.
289 * The new dynamic string token $LIB is expanded in shared library names.
290 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
292 * Aldy Hernandez contributed complete software floating point support for
293 PowerPC machines with no FPU.
295 * fexecve is implemented on Linux.
297 * The `btowc' function should work at least twice as fast due to
298 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
300 * With approriate thread add-ons cancelable functions are now implemented
301 in libc.so as well. No need to call the function in libpthread. This
302 change allowed to finally disable the incorrect and expensive handling
303 of weak definition in ld.so.
305 * Yet more PLT entries in libc.so have been removed. We finally arrived
306 at the bare minimum. Startup times improved appropriately.
308 * Support for the new Linux/x86 system call interface was added. The
309 AT_SYSINFO auxiliary vector entry is recognized and handled.
310 \f
311 Version 2.3
313 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
314 charsets.
316 * iconv (the program and the interface) now accepts empty names (excluding
317 options like //TRANSLIT) to mean "use charset of current locale".
319 * localedef can now transliterate characters in strings which are not in
320 the provided charmap. The information from the input locale is used.
322 * Prelinking support was added for ELF targets. This requires additional
323 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
325 * Read-only stdio streams now use mmap to speed up operation by eliminating
326 copying and buffer underflows. To use add 'm' to the mode string of
327 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
329 * The malloc functions were completely rewritten by Wolfram Gloger based
330 on Doug Lea's malloc-2.7.0.c.
332 * Isamu Hasegawa contributed a completely new and POSIX-conformant
333 implementation of regex.
335 * Bruno Haible upgraded the iconv and locale implementation to support
336 Unicode 3.2.
338 * Contents of the LC_* and LANG environment variables in the CEN style are
339 not recognized anymore. It never was used. Change by Ulrich Drepper.
341 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
342 thread-local storage (TLS) ABI on some platforms.
343 Changes by Ulrich Drepper. SH support by Kaz Kojima.
345 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
346 EUC-JISX0213, and TSCII.
348 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
349 BSD-compatible interface for getting all network interface addresses.
350 Implementation for IPv4 by Roland McGrath.
352 * Loading of locale data is faster due to the introduction of a locale
353 archive. Implemented by Roland McGrath and Ulrich Drepper.
355 * Startup times are significantly reduced by not using exported functions
356 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
357 and Ulrich Drepper.
359 * Steven Munroe contributed a port to PowerPC64/Linux.
360 \f
361 Version 2.2.6
363 * The Hurd now uses the GNU libio implementation of stdio rather than the
364 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
366 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
367 with the same behavior as the Linux system call of the same name.
368 \f
369 Version 2.2.5
371 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
372 128-bit long double format.
374 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
375 IBM1161, and IBM1162 charsets.
377 * Andreas Jaeger contributed a port to x86-64/Linux.
379 * Peter Bruin contributed a port to PowerPC/Hurd.
381 * libc functions using I/O streams now can handle wide-oriented streams
382 as well.
384 * optimizations in the dynamic linker. Binaries created by recent binutils
385 versions start up quicker due to reduced time spent on relocations.
387 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
388 \f
389 Version 2.2.4
391 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
392 asinh, atanh, j0 for the 128-bit long double format.
394 * Bruno Haible updated all the code handling Unicode in some form to
395 support Unicode 3.1.
397 * Speed of regex for single-byte locales is back to previous levels.
398 Patch by Isamu Hasegawa.
400 * Alpha, SPARC, and IA-64 now also using floating stacks.
402 * Startup time of internationalized applications greatly improved through
403 iconv cache. Use iconvconfig to generate the cache file.
404 Contributed by Ulrich Drepper.
406 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
407 severe performance problems. Patch by David Mosberger.
409 * The Hurd port got a lot more functionality like AIO, various stdio
410 extensions, etc. Mainly done by Roland McGrath.
412 * mtrace can now lookup symbols in shared libraries.
413 \f
414 Version 2.2.3
416 * Intel's IA-64 math library is largely integrated. It provides fast and
417 accurate implementatations for most basic and standard math functions
418 in float, double, and long double format.
420 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
421 and asin for the 96-bit long double format and asin, log, tan for the
422 128-bit long double format.
424 * The beginning of a last-bit accurate math library by IBM Haifa were added.
425 The basic double functions exist today. Contributed by Abraham Ziv
426 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
427 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
429 * An asynchronous name lookup library was added. The interface is designed
430 after POSIX AIO. The proposal was circulated beforehand to get comments.
431 No negative ones came in. Implemented by Ulrich Drepper.
433 * Port to S390/64bit contributed by Martin Schwidefsky
434 <schwidefsky@de.ibm.com>.
436 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
437 of functions for Linux/IA-64.
439 * The RPC code is now thread safe. Threads can now use the same service
440 of different services at the same time. Patch by Eric Norum
441 <eric.norum@usask.ca> with some help by Ulrich Drepper.
443 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
444 family of functions for Linux/S390.
446 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
447 of functions for Linux/x86.
449 * Port to Linux/CRIS contributed by Axis Communications.
450 \f
451 Version 2.2.2
453 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
454 we can now check for namespace violations and missing declarations. The
455 result is that almost all headers are now Unix-compliant (as defined in
456 the upcoming XPG6). The negative side is that some programs might need
457 corrections, too, if they depend on the incorrect form of the headers in
458 previous versions which defined too many symbols and included too many
459 other headers.
461 * regex now handles multibyte character sets correctly.
462 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
464 * iconv (the program) does now conform to the upcoming XPG6 and handles
465 charmaps. Instead of the charset names the path of charmaps can be
466 provided and the conversion happens based on this data.
467 Contributed by Ulrich Drepper.
469 * The locale program now provides detailed information about the installed
470 locales. While
472 locale -a
474 only lists the names of the supported locales
476 locale -a --verbose
478 provides details such as country, language, and codeset name.
479 Contributed by Ulrich Drepper.
480 \f
481 Version 2.2.1
483 * The gencat program now parses the input file according to the charset
484 selected by the LC_CTYPE category. This is important for stateful
485 character sets. To make generating catalogs easier there is a way
486 to overwrite the charset selected by the locale: before the first
487 message or $ quote line the catalog can contain a line like
489 $ codeset=ISO-8859-2
491 to select the charset (ISO-8859-2 in this case).
493 Implemented by Shinya Hanataka and Ulrich Drepper.
495 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
496 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
497 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
499 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
500 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
502 * The LANGUAGE environment variable is now ignored unless the locale is
503 changed from the default "C" locale.
505 * The usual bug fixes.
506 \f
507 Version 2.2
509 * Greg McGary added runtime support for bounds checking using gcc's
510 new -fbounded-pointers option. ix86 target is complete. PowerPC
511 is in progress.
513 * Thorsten Kukuk added secure mode support to nscd.
515 * The Berkeley db libraries have been removed.
517 Related, the nss_db module is now in a separate package since it
518 obviously requires a database library being available.
520 * Wide character I/O streams implemented by Ulrich Drepper.
522 * Functions from the extended socket API added by Ulrich Drepper.
524 * Functions feenableexcept and fedisableexcept to control the
525 behaviour of individual exceptions have been added by Andreas Jaeger.
527 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
529 * The resolver code has been updated from bind 8.2.3-T5B which supports
530 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
531 and Mark Kettenis.
533 This change could in some situations effect backward compatibility. Since
534 now `_res' is a thread-local instead of a global variable, modifying it
535 in one thread does not have any effect in other threads.
537 The resolver library was also extended to allow IPv6 as the transport
538 protocol for the requests. This work was done by Stig Venaas.
540 * Compatibility code for K&R C compilers has been removed from the
541 header files. A ISO C compiler is needed to use the library
542 (conforming to either C89 or C99 standard).
544 * Complete rewrite of the localedef program to support multibyte character
545 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
546 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
547 Implemented by Ulrich Drepper.
549 Bruno Haible significantly improved the generation and use of the data
550 structures for the wide character tables.
552 * Plural handling in gettext implemented by Ulrich Drepper.
554 * The utmp daemon has been removed.
556 * The port to MIPS-Linux has been finished by Andreas Jaeger.
558 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
559 and Yutaka Niibe.
561 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
563 * POSIX barriers implemented by Kaz Kylheku.
565 * POSIX spawn function family implemented by Ulrich Drepper.
567 * POSIX spinlocks are now available.
569 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
571 * the configure option --enable-kernel=X.Y.Z allows to strip out
572 compatibility for kernel versions before X.Y.Z. This is currently only
573 implemented for Linux.
575 * the sockaddr_in6 structure changed. The IPv6 working group added a new
576 field sin6_scope_id. This means that all programs using IPv6 should be
577 recompiled. Don't expect binary compatibility with previous glibc
578 versions.
580 * various conversion modules for IBM character sets contributed by
581 Masahide Washizawa.
583 * IA-64 port by Jes Sorensen and HJ Lu.
585 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
586 Compiling the GNU C Library for Linux/ia64
587 ******************************************
589 Please refer to the file INSTALL in the same directory as you found
590 this file for general information about configuring and compiling
591 glibc.
593 For general inquiries about glibc under Linux/ia64 please use the
594 following mailing list linux-ia64@linuxia64.org or one of the relevant
595 glibc mailing lists.
597 Recommended Tools for Compilation
598 =================================
600 In order for glibc-2.2 to build correctly on the ia64 you need at
601 least the following versions of the GNU tools (the :
603 * The Cygnus toolchain snapshot for the ia64 as of August 4
604 including the provided set of patches. It is however recommend
605 you use the October 24 toolchain snapshot or a more recent version.
607 OR alternatively you can try the following (the Cygnus toolchain is
608 the recommended solution):
610 * GCC and binutils, GAS and GNU LD out of CVS from
611 sources.redhat.com as of August 28, 2000 or later. The CVS tree
612 may require special patches to work properly on the ia64.
614 Configuring and compiling GNU Libc for Linux/ia64
615 =================================================
617 The library requires Linux kernel version 2.4.0-test4-000728 or
618 later to funtion properly. Besides that it support for debug libraries
619 is currently untested. Hence the following options
620 are required for configuring the library:
622 --disable-debug --enable-kernel=2.4.0
624 It is also important that you make sure the library picks up the
625 appropriate kernel header files, if you do not have recent enough
626 kernel headers in /usr/src/linux/include, you should use the
627 --with-headers=<path> option to specify the location.
629 As an example I personally use the following options to configure
630 the library:
632 --disable-debug
633 --disable-cvs
634 --enable-kernel=2.4.0
635 --host=ia64-linux
636 --enable-add-ons=yes
637 --prefix=/usr
638 --with-headers=/home/jes/linux/include
641 Good luck
643 Jes Sorensen <jes@linuxcare.com>,
644 November 14th, 2000
645 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
646 \f
647 Version 2.1.3
649 * bug fixes
651 \f
652 Version 2.1.2
654 * bug fixes
656 \f
657 Version 2.1.1
659 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
661 * New xdr functions are added; some rpc functions are now 64bit clean.
663 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
665 * Fixed known incompatibilities with glibc 2.0.
667 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
669 * Optimized a number of functions (especially the ELF dynamic loader).
671 * Update timezone data files.
673 * lots of charmaps corrections
675 * some new locale definitions and charmaps
677 \f
678 Version 2.1
680 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
681 conform to POSIX member type requirements. Symbol versions have been
682 adjusted as needed within the library, and for direct use by applications,
683 but there is potential for problems if third-party libraries use
684 struct timeval as part of their interface. This does not present
685 a problem for X and other "essential" system libraries.
687 * An additional locale model to support C++ Standard Library locale
688 model and probably more was implemented by Ulrich Drepper.
690 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
691 symbol level.
693 * Miles Bader provided the `argp' function family to support hierachical
694 command line argument parsing, layered on top of getopt.
696 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
698 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
699 numbers.
701 * scanf recognizes the %a and %A format for scanning floating point numbers.
703 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
704 information and interfaces for the available integer types.
706 * about 130 new math functions were added to implement the ISO C9x math
707 library.
709 * the new header <complex.h> contains definitions of the complex math
710 functions from ISO C 9X.
712 * the new header <tgmath.h> defines generic macros to use complex or
713 real valued functions.
715 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
717 * Andreas Jaeger provided a test suite for the math library.
719 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
721 * Ulrich Drepper added character set conversion functions (iconv).
723 * Optimized string functions have been added.
725 * The localedata addon is now part of glibc.
727 * An implementation of profiling shared libraries was added by Ulrich Drepper.
729 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
730 daemon for NSS (nscd).
732 Missing a better place here are some numbers on improvements. Under
733 Linux 2.1.125 un-tar-ing the kernel sources takes
735 user system wall
737 using local files 12.19s 6.88s 22.91s
739 using NIS 13.92s 8.91s 26.34s
741 using NIS & nscd 10.37s 7.34s 25.30s
743 using NIS+ 27.57s 30.37s 640.46s
745 using NIS+ & nscd 10.25s 7.83s 26.51s
747 using NIS & old nscd [1] 13.83s 8.32s 29.60s
749 Keep in mind that non-namelookup related operations dominate above times.
750 It was just a common complain that using NIS+ unpacking the kernel is
751 horribly slow.
753 [1] The old nscd implementation is not available anymore since it was
754 distributed with glibc up to version 2.0.98 and thus is now replaced.
756 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
758 * Mark Kettenis provided a Hesiod NSS module.
760 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
761 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
763 * rcmd can now handle netgroups (Dick Streefland).
765 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
766 Bambrough.
768 * Support for the IPv6 protocol has been added to the socket API, as per the
769 latest draft standards.
771 * Support for Linux 2.2 has been added.
773 * Interface changes relative to the latest 2.0.x release:
774 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
775 addseverity NEW: Unix98
776 alphasort64 NEW: LFS
777 argp_err_exit_status NEW: argp, GNU ext
778 argp_error NEW: argp, GNU ext
779 argp_failure NEW: argp, GNU ext
780 argp_help NEW: argp, GNU ext
781 argp_parse NEW: argp, GNU ext
782 argp_program_bug_address NEW: argp, GNU ext
783 argp_program_version NEW: argp, GNU ext
784 argp_program_version_hook NEW: argp, GNU ext
785 argp_state_help NEW: argp, GNU ext
786 argp_usage NEW: argp, GNU ext
787 authdes_create NEW: Secure RPC
788 authdes_getucred NEW: Secure RPC
789 authdes_pk_create NEW: Secure RPC
790 backtrace NEW: GNU ext.
791 backtrace_symbols NEW: GNU ext.
792 backtrace_symbols_fd NEW: GNU ext.
793 cacos NEW: ISO C 9x
794 cacosf NEW: ISO C 9x
795 cacosh NEW: ISO C 9x
796 cacoshf NEW: ISO C 9x
797 cacoshl NEW: ISO C 9x
798 cacosl NEW: ISO C 9x
799 capget NEW: kernel
800 capset NEW: kernel
801 carg NEW: ISO C 9x
802 cargf NEW: ISO C 9x
803 cargl NEW: ISO C 9x
804 casin NEW: ISO C 9x
805 casinf NEW: ISO C 9x
806 casinh NEW: ISO C 9x
807 casinhf NEW: ISO C 9x
808 casinhl NEW: ISO C 9x
809 casinl NEW: ISO C 9x
810 catan NEW: ISO C 9x
811 catanf NEW: ISO C 9x
812 catanh NEW: ISO C 9x
813 catanhf NEW: ISO C 9x
814 catanhl NEW: ISO C 9x
815 catanl NEW: ISO C 9x
816 cbc_crypt NEW: Secure RPC
817 ccos NEW: ISO C 9x
818 ccosf NEW: ISO C 9x
819 ccosh NEW: ISO C 9x
820 ccoshf NEW: ISO C 9x
821 ccoshl NEW: ISO C 9x
822 ccosl NEW: ISO C 9x
823 cexp NEW: ISO C 9x
824 cexpf NEW: ISO C 9x
825 cexpl NEW: ISO C 9x
826 cimag NEW: ISO C 9x
827 cimagf NEW: ISO C 9x
828 cimagl NEW: ISO C 9x
829 clearerr_locked REMOVED
830 clntunix_create NEW: sunrpc ext
831 clog NEW: ISO C 9x
832 clog10 NEW: ISO C 9x
833 clog10f NEW: ISO C 9x
834 clog10l NEW: ISO C 9x
835 clogf NEW: ISO C 9x
836 clogl NEW: ISO C 9x
837 conj NEW: ISO C 9x
838 conjf NEW: ISO C 9x
839 conjl NEW: ISO C 9x
840 cpow NEW: ISO C 9x
841 cpowf NEW: ISO C 9x
842 cpowl NEW: ISO C 9x
843 cproj NEW: ISO C 9x
844 cprojf NEW: ISO C 9x
845 cprojl NEW: ISO C 9x
846 creal NEW: ISO C 9x
847 crealf NEW: ISO C 9x
848 creall NEW: ISO C 9x
849 creat64 NEW: LFS
850 csin NEW: ISO C 9x
851 csinf NEW: ISO C 9x
852 csinh NEW: ISO C 9x
853 csinhf NEW: ISO C 9x
854 csinhl NEW: ISO C 9x
855 csinl NEW: ISO C 9x
856 csqrt NEW: ISO C 9x
857 csqrtf NEW: ISO C 9x
858 csqrtl NEW: ISO C 9x
859 ctan NEW: ISO C 9x
860 ctanf NEW: ISO C 9x
861 ctanh NEW: ISO C 9x
862 ctanhf NEW: ISO C 9x
863 ctanhl NEW: ISO C 9x
864 ctanl NEW: ISO C 9x
865 des_setparity NEW: Secure RPC
866 ecb_crypt NEW: Secure RPC
867 endutxent NEW: Unix98
868 exp10 NEW: ISO C 9x
869 exp10f NEW: ISO C 9x
870 exp10l NEW: ISO C 9x
871 exp2 NEW: ISO C 9x
872 exp2f NEW: ISO C 9x
873 exp2l NEW: ISO C 9x
874 fattach NEW: STREAMS
875 fdetach NEW: STREAMS
876 fdim NEW: ISO C 9x
877 fdimf NEW: ISO C 9x
878 fdiml NEW: ISO C 9x
879 feclearexcept NEW: ISO C 9x
880 fegetenv NEW: ISO C 9x
881 fegetexceptflag NEW: ISO C 9x
882 fegetround NEW: ISO C 9x
883 feholdexcept NEW: ISO C 9x
884 feof_locked REMOVED
885 feraiseexcept NEW: ISO C 9x
886 ferror_locked REMOVED
887 fesetenv NEW: ISO C 9x
888 fesetexceptflag NEW: ISO C 9x
889 fesetround NEW: ISO C 9x
890 fetestexcept NEW: ISO C 9x
891 feupdateenv NEW: ISO C 9x
892 fflush_locked REMOVED
893 ffsl NEW: GNU ext.
894 ffsll NEW: GNU ext.
895 fgetpos64 NEW: LFS
896 fgets_unlocked NEW: GNU ext.
897 fileno_locked REMOVED
898 fma NEW: ISO C 9x
899 fmaf NEW: ISO C 9x
900 fmal NEW: ISO C 9x
901 fmax NEW: ISO C 9x
902 fmaxf NEW: ISO C 9x
903 fmaxl NEW: ISO C 9x
904 fmin NEW: ISO C 9x
905 fminf NEW: ISO C 9x
906 fminl NEW: ISO C 9x
907 fmtmsg NEW: Unix98
908 fopen64 NEW: LFS
909 fputc_locked REMOVED
910 fputs_unlocked NEW: GNU ext.
911 fread_unlocked NEW: GNU ext.
912 freopen64 NEW: LFS
913 fseeko NEW: Unix98
914 fsetpos64 NEW: LFS
915 fstatfs64 NEW: LFS
916 fstatvfs NEW: Unix98
917 fstatvfs64 NEW: LFS
918 ftello NEW: Unix98
919 ftello64 NEW: LFS
920 ftruncate64 NEW: LFS
921 ftw64 NEW: LFS
922 fwrite_unlocked NEW: GNU ext.
923 gai_strerror NEW: IPv6
924 gamma_r REMOVED
925 gammaf_r REMOVED
926 gammal_r REMOVED
927 getchar_locked REMOVED
928 getdate NEW: Unix98
929 getdate_err NEW: Unix98
930 getdate_r NEW: GNU ext.
931 getmsg NEW: STREAMS
932 getnameinfo NEW: IPv6
933 getnetname NEW: Secure RPC
934 getpmsg NEW: STREAMS
935 getpt NEW: Unix98 PTY
936 getrlimit64 NEW: LFS
937 getutxent NEW: Unix98
938 getutxid NEW: Unix98
939 getutxline NEW: Unix98
940 glob64 NEW: GNU ext.
941 globfree64 NEW: GNU ext.
942 gnu_get_libc_release NEW: GNU ext.
943 gnu_get_libc_version NEW: GNU ext.
944 grantpt NEW: Unix98 PTY
945 host2netname NEW: Secure RPC
946 iconv NEW: iconv
947 iconv_close NEW: iconv
948 iconv_open NEW: iconv
949 if_freenameindex NEW: IPv6
950 if_indextoname NEW: IPv6
951 if_nameindex NEW: IPv6
952 if_nametoindex NEW: IPv6
953 in6addr_any NEW: IPv6
954 in6addr_loopback NEW: IPv6
955 inet6_isipv4mapped NEW: IPv6
956 isastream NEW: STREAMS
957 iswblank NEW: GNU ext.
958 key_decryptsession NEW: Secure RPC
959 key_decryptsession_pk NEW: Secure RPC
960 key_encryptsession NEW: Secure RPC
961 key_encryptsession_pk NEW: Secure RPC
962 key_gendes NEW: Secure RPC
963 key_get_conv NEW: Secure RPC
964 key_secretkey_is_set NEW: Secure RPC
965 key_setnet NEW: Secure RPC
966 key_setsecret NEW: Secure RPC
967 llrint NEW: ISO C 9x
968 llrintf NEW: ISO C 9x
969 llrintl NEW: ISO C 9x
970 llround NEW: ISO C 9x
971 llroundf NEW: ISO C 9x
972 llroundl NEW: ISO C 9x
973 log2 NEW: ISO C 9x
974 log2f NEW: ISO C 9x
975 log2l NEW: ISO C 9x
976 lrint NEW: ISO C 9x
977 lrintf NEW: ISO C 9x
978 lrintl NEW: ISO C 9x
979 lround NEW: ISO C 9x
980 lroundf NEW: ISO C 9x
981 lroundl NEW: ISO C 9x
982 lseek64 NEW: LFS
983 makecontext NEW: Unix98
984 mempcpy NEW: GNU ext.
985 mmap64 NEW: LFS
986 moncontrol REMOVED
987 modify_ldt NEW: kernel
988 nan NEW: ISO C 9x
989 nanf NEW: ISO C 9x
990 nanl NEW: ISO C 9x
991 nearbyint NEW: ISO C 9x
992 nearbyintf NEW: ISO C 9x
993 nearbyintl NEW: ISO C 9x
994 netname2host NEW: Secure RPC
995 netname2user NEW: Secure RPC
996 nexttoward NEW: ISO C 9x
997 nexttowardf NEW: ISO C 9x
998 nexttowardl NEW: ISO C 9x
999 nftw NEW: Unix98
1000 nftw64 NEW: LFS
1001 open64 NEW: LFS
1002 passwd2des NEW: Secure RPC
1003 pow10 NEW: GNU ext.
1004 pow10f NEW: GNU ext.
1005 pow10l NEW: GNU ext.
1006 pread NEW: Unix98
1007 pread64 NEW: LFS
1008 printf_size NEW: GNU ext.
1009 printf_size_info NEW: GNU ext.
1010 profil_counter REMOVED
1011 pthread_mutexattr_getkind_np REPLACED
1012 pthread_mutexattr_setkind_np REPLACED
1013 ptsname NEW: Unix98 PTY
1014 ptsname_r NEW: Unix98 PTY
1015 putc_locked REMOVED
1016 putchar_locked REMOVED
1017 putgrent NEW: GNU ext.
1018 putmsg NEW: STREAMS
1019 putpmsg NEW: STREAMS
1020 pututxline NEW: Unix98
1021 pwrite NEW: Unix98
1022 pwrite64 NEW: LFS
1023 readdir64 NEW: LFS
1024 readdir64_r NEW: LFS
1025 remquo NEW: ISO C 9x
1026 remquof NEW: ISO C 9x
1027 remquol NEW: ISO C 9x
1028 round NEW: ISO C 9x
1029 roundf NEW: ISO C 9x
1030 roundl NEW: ISO C 9x
1031 rtime NEW: GNU ext.
1032 scalbln NEW: ISO C 9x
1033 scalblnf NEW: ISO C 9x
1034 scalblnl NEW: ISO C 9x
1035 scandir64 NEW: LFS
1036 sendfile NEW: kernel
1037 setcontext NEW: Unix98
1038 setrlimit64 NEW: LFS
1039 setutxent NEW: Unix98
1040 sighold NEW: Unix98
1041 sigignore NEW: Unix98
1042 sigqueue NEW: POSIX.1b
1043 sigrelse NEW: Unix98
1044 sigset NEW: POSIX.1b
1045 sigtimedwait NEW: POSIX.1b
1046 sigwaitinfo NEW: POSIX.1b
1047 sincos NEW: GNU ext.
1048 sincosf NEW: GNU ext.
1049 sincosl NEW: GNU ext.
1050 statfs64 NEW: LFS
1051 statvfs NEW: Unix98
1052 statvfs64 NEW: LFS
1053 strcasestr NEW: GNU ext.
1054 strtoimax NEW: ISO C 9x
1055 strtoumax NEW: ISO C 9x
1056 strverscmp NEW: GNU ext.
1057 svcauthdes_stats NEW: Secure RPC
1058 svcunix_create NEW: sunrpc etx
1059 svcunixfd_create NEW: sunrpc ext
1060 swapcontext NEW: Unix98
1061 tcgetsid NEW: Unix98 PTY
1062 tdestroy NEW: GNU ext.
1063 tgamma NEW: ISO C 9x
1064 tgammaf NEW: ISO C 9x
1065 tgammal NEW: ISO C 9x
1066 tmpfile64 NEW: LFS
1067 trunc NEW: ISO C 9x
1068 truncate64 NEW: LFS
1069 truncf NEW: ISO C 9x
1070 truncl NEW: ISO C 9x
1071 umount2 NEW: kernel
1072 unlockpt NEW: Unix98 PTY
1073 updwtmpx NEW: Unix98
1074 user2netname NEW: Secure RPC
1075 utmpxname NEW: Unix98
1076 versionsort NEW: GNU ext.
1077 versionsort64 NEW: GNU ext.
1078 waitid NEW: Unix98
1079 wcscasecmp NEW: GNU ext.
1080 wcsncasecmp NEW: GNU ext.
1081 wcsnlen NEW: GNU ext.
1082 wcstoimax NEW: ISO C 9x
1083 wcstoll NEW: ISO C 9x
1084 wcstoull NEW: ISO C 9x
1085 wcstoumax NEW: ISO C 9x
1086 wcswcs NEW: Unix98
1087 wordexp NEW: POSIX.2
1088 wordfree NEW: POSIX.2
1089 write_profiling REMOVED
1090 xdecrypt NEW: Secure RPC
1091 xdr_authdes_cred NEW: Secure RPC
1092 xdr_authdes_verf NEW: Secure RPC
1093 xdr_cryptkeyarg NEW: Secure RPC
1094 xdr_cryptkeyarg2 NEW: Secure RPC
1095 xdr_cryptkeyres NEW: Secure RPC
1096 xdr_getcredres NEW: Secure RPC
1097 xdr_key_netstarg NEW: Secure RPC
1098 xdr_key_netstres NEW: Secure RPC
1099 xdr_keybuf NEW: Secure RPC
1100 xdr_keystatus NEW: Secure RPC
1101 xdr_netnamestr NEW: Secure RPC
1102 xdr_sizeof NEW: Secure RPC
1103 xdr_unixcred NEW: sunrpc ext
1104 xencrypt NEW: Secure RPC
1105 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1106 \f
1107 Version 2.0.6
1109 * more bug fixes
1111 \f
1112 Version 2.0.5
1114 * more bug fixes
1116 * inet_ntoa is thread-safe
1118 * updwtmp is moved from libutil to libc
1120 * rewrite of cbrt function
1122 * update of timezone data
1123 \f
1124 Version 2.0.4
1126 * more bug fixes
1127 \f
1128 Version 2.0.3
1130 * more bug fixes
1131 \f
1132 Version 2.0.2
1134 * more bug fixes
1136 * add atoll function
1138 * fix complex problems in Berkeley DB code
1140 * fix math functions
1141 \f
1142 Version 2.0.1
1144 * fixed lots of header problems (especially Linux/GNU specific)
1146 * dynamic loader preserves all registers
1148 * Roland McGrath provided support for handling of auxiliary objects in
1149 the ELF dynamic loader.
1151 * support for parallel builds is improved
1152 \f
1153 Version 2.0
1155 * GNU extensions are no longer declared by default. To enable them you
1156 must define the macro `_GNU_SOURCE' in your program or compile with
1157 `-D_GNU_SOURCE'.
1159 * The library has changed from using GNU ld symbol aliases to using weak
1160 symbols where available. The ELF object file format supports weak
1161 symbols; GNU ld also supports weak symbols in the a.out format. (There
1162 is also now support for other GNU ld extensions in ELF. Use the
1163 `--with-elf' option to configure to indicate you have ELF, and
1164 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1165 of many files which contained only symbol aliases, reducing the size of
1166 the source and the compiled library; many other files were renamed to
1167 less cryptic names previously occupied by the symbol alias files.
1168 There is a new header file <elf.h> for programs which operate on
1169 files in the ELF format.
1171 * Converted to Autoconf version 2, so `configure' has more options.
1172 Run `configure --help' to see the details.
1174 * The library can now be configured to build profiling, highly-optimized
1175 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1176 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1177 `configure' enable building these extra libraries. The shared library is
1178 built by default when using both ELF and GNU ld. When shared libraries
1179 are enabled, the new library `-ldl' is available for arbitrary run-time
1180 loading of shared objects; its interface is defined in <dlfcn.h>. The
1181 new header file <link.h> gives access to the internals of the run-time
1182 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1183 application of same name on other systems and it provides information
1184 about dynamically linked binaries.
1186 * The C library now provides the run-time support code for profiling
1187 executables compiled with `-pg'. Programs can control the profiling code
1188 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1189 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1190 the support for this file format was contributed by David Mosberger-Tang.
1192 * The math code has been replaced with a math library based on fdlibm from
1193 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1194 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1195 functions. The math functions now reside in a separate library, so
1196 programs using them will need to use `-lm' their linking commands.
1198 * John C. Bowman contributed optimized ix87 assembler inline functions.
1200 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1201 mechanism similar to that found in Solaris 2. This is now used for the
1202 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1203 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1204 file controls what services are used for each individual database. This
1205 works by loading shared libraries with names specified in `nsswitch.conf',
1206 so service modules can be changed or added at any time without even
1207 relinking any program. Currently there are the file, db, and NIS based
1208 NSS services available.
1210 * The new functions `strtoq' and `strtouq' parse integer values from
1211 strings, like `strtol' and `strtoul', but they return `long long int' and
1212 `unsigned long long int' values, respectively (64-bit quantities).
1214 * The new functions `strtof' and `strtold' parse floating-point values from
1215 strings, like `strtod', but they return `float' and `long double' values,
1216 respectively (on some machines `double' and `long double' are the same).
1218 * Ulrich Drepper has contributed new implementations of the floating-point
1219 printing and reading code used in the `printf' family of functions and
1220 `strtod', `strtof', and `strtold'. These new functions are perfectly
1221 accurate, and much faster than the old ones.
1223 * The implementation of the POSIX locale model was completely rewritten by
1224 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1225 to compile the POSIX locale definition.
1227 * The former dummy implementations of the strcoll and strxfrm function are
1228 now replaced by fully functional code contributed by Ulrich Drepper. The
1229 collation information comes from the POSIX locale definitions.
1231 * The new header <langinfo.h> defines an interface for accessing
1232 various locale-dependent data (using the locale chosen with `setlocale').
1234 * Ulrich Drepper has contributed a new suite of functions for operation on
1235 wide-character and multibyte-character strings, in <wchar.h>;
1236 and classification and case conversion of wide characters, in <wctype.h>.
1237 These new functions are conforming to the ISO C, Amendement 1 specification.
1239 * There is now a second implementation of the standard I/O library available.
1240 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1241 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1243 * You can now use positional parameter specifications in format strings
1244 for the `printf' and `scanf' families of functions. For example,
1245 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1246 ``Number 6, Mr Jones''. This is mainly useful when providing different
1247 format strings for different languages, whose grammars may dictate
1248 different orderings of the values being printed. To support this
1249 feature, the interface for `register_printf_handler' has changed; see
1250 the header file <printf.h> for details.
1252 * The `printf' and `scanf' families of functions now understand a new
1253 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1254 to group numbers as indicated by the locale; for `scanf' and friends, this
1255 says to accept as valid only a number with all the proper grouping
1256 separators in the right places. In the default "C" locale, numbers are
1257 not grouped; but locales for specific countries will define the usual
1258 conventions (i.e. separate thousands with `,' in the US locale).
1260 * The pgrp functions have been regularized, slightly incompatibly but much
1261 less confusingly. The core functions are now `getpgid' and `setpgid',
1262 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1263 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1264 provided for compatibility. There is no longer an incompatible `getpgrp'
1265 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1267 * The new header file <fts.h> and suite of functions simplify programs that
1268 operate on directory trees. This code comes from 4.4 BSD.
1270 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1271 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1272 NSS scheme used in glibc.
1274 * There is a new malloc debugging hook `__memalign_hook'.
1276 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1277 `unsigned int' in <sys/types.h>. These are for compatibility only and
1278 their use is discouraged.
1280 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1281 done differently, so that it works even without GNU ld.
1283 * New function `euidaccess' checks allowed access to a file like `access',
1284 but using the effective IDs instead of the real IDs.
1286 * The time zone data files have been updated for the latest and greatest
1287 local time conventions of the countries of the world.
1289 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1290 see <dirent.h>.
1292 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1293 for formatting floating-point numbers. They are provided only for
1294 compatibility; new programs should use `sprintf' instead. There are
1295 also equivalent function for the `long double' floating-point type and
1296 all functions also exist in a reentrant form.
1298 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1299 functions for maintaining the login-record files (primarily of use to
1300 system programs such as `login'), and convenient functions for
1301 allocating and initializing a pseudo-terminal (pty) device.
1303 * Ulrich Drepper has contributed new support for System V style
1304 shared memory and IPC on systems that support it.
1306 * Ulrich Drepper has contributed several miscellaneous new functions found
1307 in System V: The `hsearch' family of functions provide an effective
1308 implementation of hash tables; `a64l' and `l64a' provide a very simple
1309 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1310 number generator.
1312 * Ulrich Drepper has contributed new reentrant counterparts for the
1313 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1315 * Ulrich Drepper has contributed new, highly-optimized versions of several
1316 string functions for the i486/Pentium family of processors.
1318 * Ulrich Drepper has updated the Linux-specific code, based largely
1319 on work done in Hongjiu Lu's version of GNU libc for Linux.
1320 The GNU library now supports Linux versions 2.0.10 and later,
1321 using the ELF object file format (i[3456]86-*-linux).
1323 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1325 * David Mosberger-Tang and Richard Henderson have ported the C library
1326 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1327 dynamic linking support for ELF/Alpha.
1329 * Richard Henderson contributed several Alpha optimized assembler function
1330 for arithmetic and string handling.
1332 * Ulrich Drepper has contributed a new set of message catalog functions to
1333 support multiple languages using the <libintl.h> interface, for use with
1334 his new package GNU gettext. Translation volunteers have contributed
1335 catalogs of the library's messages in Spanish, German, and Korean.
1337 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1338 program and the `catgets' function for reading the catalog files it
1339 creates. (The <libintl.h> interface is preferred; we include the
1340 <nl_types.h> interface using `catgets' only for source compatibility with
1341 programs already written to use it.)
1343 * New header file <values.h> gives SVID-compatible names for <limits.h>
1344 constants.
1346 * Various new macros, declarations, and small header files for compatibility
1347 with 4.4 BSD.
1349 * New function `group_member' is a convenient way to check if a process has
1350 a given effective group ID.
1352 * When using GCC 2.7 and later, the socket functions are now declared in a
1353 special way so that passing an argument of type `struct sockaddr_in *',
1354 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1355 `struct sockaddr *' type, does not generate a type-clash warning.
1357 * New function `error' declared in header file <error.h> is a convenient
1358 function for printing error messages and optionally exiting; this is the
1359 canonical function used in GNU programs. The new functions `err', `warn',
1360 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1361 doing the same thing.
1363 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1364 POSIX.2 `glob' function to do ~ and {...} expansion.
1366 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1367 `clearenv' which is used in POSIX.9 is also available.
1369 * New function `getsid' returns session ID number on systems that support it.
1371 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1372 files <db.h> and <mpool.h> provide a rich set of functions for several
1373 types of simple databases stored in memory and in files, and <ndbm.h> is
1374 an old `ndbm'-compatible interface using the `db' functions. Link with
1375 `-ldb' to get these functions.
1377 * New macro `strdupa' copies a string like `strdup', but uses local stack
1378 space from `alloca' instead of dynamic heap space from `malloc'.
1380 * New function `strnlen' is like `strlen' but searches only a given maximum
1381 number of characters for the null terminator. `stpncpy', `strndup' and
1382 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1383 function.
1385 * New function `statfs' in header <sys/statfs.h>.
1387 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1388 provide convenient functions for operating on blocks of null-terminated
1389 strings.
1391 * A new suite of functions in <utmp.h> handle all the details of reading
1392 and writing the utmp file.
1394 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1395 Thorsten Kukuk.
1397 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1398 completely POSIX compliant and also implemented the extended functionality
1399 to handle alternate digit representation and alternate era date formats.
1401 * Ulrich Drepper provided an implementation of the `strptime' function
1402 defined in XPG4.2 which transforms a string into a `struct tm' value.
1404 * Paul Eggert provided the tzselect shell script as part of the timezone
1405 code. The shell script makes it easy to select the correct timezone
1406 specification.
1408 * The implementation of the malloc family of functions is completely replaced
1409 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1410 The implementation uses the mmap function (if available) and it is
1411 optimized for the use in multi threaded programs.
1413 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1414 functions. This new functionality is usable by specifying a special
1415 salt string and it is compatible with implementation on *BSD systems.
1417 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1418 `getsubopt' to handle second level command line options, `bsd_signal'
1419 to access BSD style `signal' functionality, the obsolete `regexp' style
1420 expression matcher.
1422 * the `lchown' function is available on system which support this
1423 functionality.
1425 * The implementation of the shadow password handling function was contributed
1426 by Ulrich Drepper.
1428 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1430 * POSIX.1g support was added. The <sys/select.h> header is available,
1431 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1432 implementation of `getaddrinfo'.
1433 \f
1434 Version 1.09
1436 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1438 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1439 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1441 * The new function `daemon' from 4.4 BSD is useful for server programs that
1442 want to put themselves in the background.
1444 * Joel Sherrill has contributed support for several standalone boards that
1445 run without an operating system.
1447 * `printf', `scanf' and friends now accept a `q' type modifier for long
1448 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1450 * All of the code taken from BSD (notably most of the math and networking
1451 routines) has been updated from the BSD 4.4-Lite release.
1453 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1455 * The new functions `getdomainname' and `setdomainname' fetch or change the
1456 YP/NIS domain name. These are system calls which exist on systems which
1457 have YP (aka NIS).
1459 * The time zone data files have been updated for the latest international
1460 conventions.
1462 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1463 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1464 \f
1465 Version 1.08
1467 * The C library now includes support for Sun RPC, from Sun's free
1468 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1469 are included. (There is still no support for YP.)
1471 * Tom Quinn has contributed a port of the C library to SGI machines running
1472 Irix 4 (mips-sgi-irix4).
1474 * The new `lockf' function is a simplified interface to the locking
1475 facilities of `fcntl', included for compatibility.
1477 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1479 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1481 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1482 compatibility.
1484 * The error message printed by `assert' for a failed assertion now includes
1485 the name of the program (if using GNU ld) and the name of the calling
1486 function (with versions of GCC that support this).
1488 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1490 * The library now includes the <sys/mman.h> header file and memory
1491 management functions `mmap', `munmap', `mprotect', `msync', and
1492 `madvise', on systems that support those facilities.
1494 * The interface for `mcheck' has changed slightly: the function called to
1495 abort the program when an allocation inconsistency is detected now takes
1496 an argument that indicates the type of failure. The new function
1497 `mprobe' lets you request a consistency check for a particular block at
1498 any time (checks are normally done only when you call `free' or `realloc'
1499 on a block).
1501 * It is now possible to easily cross-compile the C library, building on one
1502 system a library to run on another machine and/or operating system. All
1503 you need to do is set the variable `HOST_CC' in `configparms' to the
1504 native compiler for programs to run on the machine you are building on (a
1505 few generator programs are used on Unix systems); set `CC' to the
1506 cross-compiler.
1508 * The new function `fexecve' (only implemented on the GNU system) executes
1509 a program file given a file descriptor already open on the file.
1510 \f
1511 Version 1.07
1513 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1514 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1516 * You can set the variable `libprefix' in `configparms' to specify a prefix
1517 to be prepended to installed library files; this makes it easy to install
1518 the GNU C library to be linked as `-lgnuc' or whatever.
1520 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1521 copies a limited number of characters from a string, and returns the
1522 address of the last character written.
1524 * You no longer need to check for whether the installed `stddef.h' is
1525 compatible with the GNU C library. configure now checks for you.
1527 * You can now define a per-stream `fileno' function to convert the
1528 stream's cookie into an integral file descriptor.
1530 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1531 allocates zero bytes of storage, and returns a unique pointer which
1532 you can pass to `realloc' or `free'. The behavior is undefined if
1533 you dereference this pointer.
1535 * The C library now runs on Sony NEWS m68k machines running either
1536 NewsOS 3 or NewsOS 4.
1538 * The new `syscall' function is a system-dependent primitive function
1539 for invoking system calls. It has the canonical behavior on Unix
1540 systems, including unreliable return values for some calls (such as
1541 `pipe', `fork' and `getppid').
1543 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1544 to `EAGAIN', which is the preferred name. On systems whose kernels
1545 use two distinct codes, the C library now translates EWOULDBLOCK to
1546 EAGAIN in every system call function.
1547 \f
1548 Version 1.06
1550 * The GNU C Library Reference Manual is now distributed with the library.
1551 `make dvi' will produce a DVI file of the printed manual.
1552 `make info' will produce Info files that you can read on line using C-h i
1553 in Emacs or the `info' program.
1554 Please send comments on the manual to bug-glibc-manual@gnu.org.
1556 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1558 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1560 * Jason Merrill has contributed a port to the Sequent Symmetry running
1561 Dynix version 3 (i386-sequent-dynix).
1563 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1564 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1566 * New function `memory_warnings' lets you arrange to get warnings when
1567 malloc is running out of memory to allocate, like Emacs gives you.
1569 * The C library now contains the relocating allocator used in Emacs 19 for
1570 its editing buffers. This allocator (ralloc) minimizes allocation
1571 overhead and fragmentation by moving allocated regions around whenever it
1572 needs to. You always refer to a ralloc'd region with a "handle" (a
1573 pointer to a pointer--an object of type `void **').
1575 * There is a new `printf' format: `%m' gives you the string corresponding
1576 to the error code in `errno'.
1578 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1579 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1580 pass, the `a' modifier says to fill in a `char **' you pass with a
1581 malloc'd string.
1583 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1584 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1585 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1587 * `mkstemp' is a traditional Unix function to atomically create and open a
1588 uniquely-named temporary file.
1589 \f
1590 Version 1.05
1592 * The standard location for the file that says what the local timezone is
1593 has changed again. It is now `/usr/local/etc/localtime' (or more
1594 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1596 * The distribution no longer contains any files with names longer than 14
1597 characters.
1599 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1600 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1602 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1603 \f
1604 Version 1.04
1606 * The configuration process has changed quite a bit. The `configure'
1607 script is now used just like the configuration scripts for other GNU
1608 packages. The `sysdeps' directory hierarchy is much rearranged.
1609 The file `INSTALL' explains the new scheme in detail.
1611 * The header files no longer need to be processed into ANSI C and
1612 traditional C versions. There is just one set of files to install, and
1613 it will work with ANSI or old C compilers (including `gcc -traditional').
1615 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1616 MIPS DECStation running Ultrix 4.
1618 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1619 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1620 made itself into a shared library.
1622 * Yet further improved support for the i386, running 4.3 BSD-like systems
1623 (such as Mach 3 with the Unix single-server), or System V.
1625 * New function `strncasecmp' to do case-insensitive string comparison
1626 with limited length.
1628 * New function `strsep' is a reentrant alternative to `strtok'.
1630 * New functions `scandir' and `alphasort' for searching directories.
1632 * New function `setenv' is a better interface to `putenv'.
1634 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1635 function for traversing a directory tree.
1637 * The GNU obstack package is now also part of the C library.
1638 The new function `open_obstack_stream' creates a stdio stream that
1639 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1640 formatted output directly to an obstack.
1642 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1643 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1645 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1647 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1648 things to your strings.
1650 * There are some new test programs: test-fseek, testmb, and testrand.
1652 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1653 These ports are not finished, but are a good starting place for really
1654 supporting those systems.
1656 * `/etc/localtime' is now the standard location for the file that says what
1657 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1658 This follows the general principle that `/etc' is the place for all local
1659 configuration files.
1661 * The C library header files now use `extern "C"' when used by the C++
1662 compiler, so the C library should now work with C++ code.
1664 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1665 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
1666 in <strings.h>.)
1668 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1669 function which uses the `merge sort' algorithm, and is said to be
1670 significantly faster than the old GNU `qsort' function. Merge sort is
1671 now the standard `qsort' function. The new algorithm can require a lot
1672 of temporary storage; so, the old sorting function is called when the
1673 required storage is not available.
1675 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1676 provides the Unix `crypt' function, plus some other entry points.
1678 * The code and header files taken from 4.4 BSD have been updated with the
1679 latest files released from Berkeley.
1680 \f
1681 ----------------------------------------------------------------------
1682 Copyright information:
1684 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1685 Free Software Foundation, Inc.
1687 Permission is granted to anyone to make or distribute verbatim copies
1688 of this document as received, in any medium, provided that the
1689 copyright notice and this permission notice are preserved,
1690 thus giving the recipient permission to redistribute in turn.
1692 Permission is granted to distribute modified versions
1693 of this document, or of portions of it,
1694 under the above conditions, provided also that they
1695 carry prominent notices stating who last changed them.
1696 \f
1697 Local variables:
1698 version-control: never
1699 End: