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1 GNU C Library NEWS -- history of user-visible changes. 2008-5-12
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.
15 \f
16 Version 2.8
18 * New locales: bo_CN, bo_IN.
20 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
22 * Sorting rules for some Indian languages (Devanagari and Gujarati).
23 Implemented by Pravin Satpute.
25 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
27 * nscd caches now all timeouts for DNS entries
28 Implemented by Ulrich Drepper.
30 * nscd is more efficient and wakes up less often.
31 Implemented by Ulrich Drepper.
33 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
34 vdprintf, and obstack_vprintf.
35 Implemented by Jakub Jelinek.
37 * Faster memset for x86-64.
38 Implemented by Harsha Jagasia and H.J. Lu.
40 * Faster memcpy on x86.
41 Implemented by Ulrich Drepper.
43 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
44 Implemented by Ulrich Drepper.
46 * Faster sqrt and sqrtf implemention for some PPC variants.
47 Implemented by Stephen Munroe.
48 \f
49 Version 2.7
51 * More checking functions: fread, fread_unlocked, open*, mq_open.
52 Implemented by Jakub Jelinek and Ulrich Drepper.
54 * Extend fortification to C++. Implemented by Jakub Jelinek.
56 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
57 by not recognizing 'a' as a modifier when those specs are requested.
58 Implemented by Jakub Jelinek.
60 * PPC optimizations to math and string functions.
61 Implemented by Steven Munroe.
63 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
64 options to be passed. Implemented by Ulrich Drepper.
66 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
68 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
69 Implemented by Ulrich Drepper.
71 * Handle private futexes in the NPTL implementation.
72 Implemented by Jakub Jelinek and Ulrich Drepper.
74 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
75 Implemented by Roland McGrath and Ulrich Drepper.
77 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
79 * SHA-256 and SHA-512 based password encryption.
80 Implemented by Ulrich Drepper.
82 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
83 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
84 yo_NG.
86 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
87 Implemented by Ulrich Drepper.
88 \f
89 Version 2.6
91 * New Linux interfaces: epoll_pwait, sched_getcpu.
93 * New generic interfaces: strerror_l.
95 * nscd can now cache the services database. Implemented by Ulrich Drepper.
97 \f
98 Version 2.5
100 * For Linux, the sorting of addresses returned by getaddrinfo now also
101 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
102 Implemented by Ulrich Drepper.
104 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
105 Implemented by Ulrich Drepper.
107 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
109 * New iconv module for MIK. Contributed by Alexander Shopov.
111 * For sites with broken group and/or passwd database, the auto-propagate
112 option of nscd can prevent creating ID lookup entries from the results
113 of a name lookup and vice versa. This usually is no problem but some
114 site might have problems with the default behavior.
115 Implemented by Ulrich Drepper.
117 * Iterating over entire database in NIS can be slow. With the
118 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
119 to trade time for memory. The entire database will be read at once.
120 Implemented by Ulrich Drepper.
122 * The interfaces introduced in RFC 3542 have been implemented by
123 Ulrich Drepper.
125 * Support for the new ELF hash table format was added by Ulrich Drepper.
127 * Support for priority inheritance mutexes added by Jakub Jelinek and
128 Ulrich Drepper.
130 * Support for priority protected mutexes added by Jakub Jelinek.
132 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
133 or_IN, csb_PL, fy_NL, sr_ME.
134 \f
135 Version 2.4
137 * More overflow detection functions.
139 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
140 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
142 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
143 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
144 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
145 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
146 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
147 by Masahide Washizawa.
149 * It is now possible to install audit libraries for the dynamic linker using
150 LD_AUDIT. Implemented by Ulrich Drepper.
152 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
153 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
154 For a libc and libpthread that works well on Linux 2.4 kernels, we
155 recommend using the stable 2.3 branch.
157 * The new function open_wmemstream acts like open_memstream,
158 but uses a wchar_t wide character buffer.
160 * The new function ppoll is an improved version of poll, similar to pselect.
162 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
163 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
164 renameat, unlinkat, linkat, symlinkat, readlinkat.
166 * New Linux kernel system calls: unshare,
167 inotify_init, inotify_add_watch, inotify_rm_watch.
169 * The euidaccess function is now also known by the alias eaccess,
170 for compatibility with some other systems.
172 * Timezone data updated to 2006b version.
173 \f
174 Version 2.3.6
176 * The following bugs are resolved with this release:
178 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
179 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
180 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
181 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
182 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
183 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
185 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
187 * As of this release, GCC 4 can be used to compile the C Library.
189 * Timezone data updated to 2005m version.
190 \f
191 Version 2.3.5
193 * The following bugs are resolved with this release:
195 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
196 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
197 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
198 777, 787, 821, 822, 823, 825
200 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
201 \f
202 Version 2.3.4
204 * Support for RFC 3678. Real implementations exist only for Linux so far.
205 Implemented by Ulrich Drepper.
207 * nscd can now cache entries persistently. Expiring entries are reloaded.
208 For speedups the cache can be shared in memory with client processes.
209 Implemented by Ulrich Drepper.
211 * nscd can now perform SELinux checks.
212 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
214 * getaddrinfo queries are now cached. Canonical name lookup is performed
215 efficiently.
216 Implemented by Ulrich Drepper.
218 * The nothrow function attribute is used when headers are used by gcc when
219 compiling C code. This can avoid significant amounts of exception
220 handling data.
222 * The malloc functions perform more error checking and are stricter when
223 it comes to reacting on errors. The default action is to terminate
224 the process after showing an error message. Implemented by Ulrich Drepper.
226 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
227 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
229 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
230 namespaces using the new function dlmopen(). This feature is of course,
231 like most other dynamic loading functionality, not available in statically
232 linked applications. Implemented by Ulrich Drepper.
234 * Low-overhead boundary checking variants of string and some stdio functions
235 were added. These are to be used in conjunction with a gcc patch by
236 Jakub Jelinek which adds calls to these functions if possible.
237 Implemented by Jakub Jelinek and Ulrich Drepper.
239 * Old code for several operating systems and machine architectures that
240 have not been in working condition in a long time have been removed from
241 the main source tree maintained by the GNU C Library's maintainers.
242 These files are now reside in the separate `ports' source module
243 that is usable as an add-on when building the library.
244 \f
245 Version 2.3.3
247 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
248 interrogate the dynamic linker, compatible with the Solaris interface.
250 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
251 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
253 * getifaddrs now uses the netlink interface on Linux to get its information.
254 Implemented by Thorsten Kukuk.
256 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
257 Implemented by Ulrich Drepper.
259 * support for non-executable stacks on x86 has been added. Changes mostly
260 by Roland McGrath.
262 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
263 and Ulrich Drepper.
265 * getaddrinfo now performs destination address selection according to
266 RFC 3484.
267 \f
268 Version 2.3.2
270 * Thread-safe interfaces for many functions that access locale data
271 were added in version 2.3, but these features were omitted from NEWS.
272 Many functions have variants with an `_l' suffix that take a `locale_t'
273 object as a parameter rather than consulting the current locale.
274 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
275 create and maintain `locale_t' objects. Additionally, the new function
276 `uselocale' sets "the current locale" (as used by functions not so
277 parameterized) set for an individual thread. These features were added
278 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
280 * The functions getresuid, getresgid, setresuid, and setresgid, which
281 have long been available on Linux, are now declared in <unistd.h>
282 and are now also available on the Hurd.
284 * ELF thread-local storage support (TLS) now works on x86-64.
286 * The new dynamic string token $LIB is expanded in shared library names.
287 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
289 * Aldy Hernandez contributed complete software floating point support for
290 PowerPC machines with no FPU.
292 * fexecve is implemented on Linux.
294 * The `btowc' function should work at least twice as fast due to
295 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
297 * With approriate thread add-ons cancelable functions are now implemented
298 in libc.so as well. No need to call the function in libpthread. This
299 change allowed to finally disable the incorrect and expensive handling
300 of weak definition in ld.so.
302 * Yet more PLT entries in libc.so have been removed. We finally arrived
303 at the bare minimum. Startup times improved appropriately.
305 * Support for the new Linux/x86 system call interface was added. The
306 AT_SYSINFO auxiliary vector entry is recognized and handled.
307 \f
308 Version 2.3
310 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
311 charsets.
313 * iconv (the program and the interface) now accepts empty names (excluding
314 options like //TRANSLIT) to mean "use charset of current locale".
316 * localedef can now transliterate characters in strings which are not in
317 the provided charmap. The information from the input locale is used.
319 * Prelinking support was added for ELF targets. This requires additional
320 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
322 * Read-only stdio streams now use mmap to speed up operation by eliminating
323 copying and buffer underflows. To use add 'm' to the mode string of
324 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
326 * The malloc functions were completely rewritten by Wolfram Gloger based
327 on Doug Lea's malloc-2.7.0.c.
329 * Isamu Hasegawa contributed a completely new and POSIX-conformant
330 implementation of regex.
332 * Bruno Haible upgraded the iconv and locale implementation to support
333 Unicode 3.2.
335 * Contents of the LC_* and LANG environment variables in the CEN style are
336 not recognized anymore. It never was used. Change by Ulrich Drepper.
338 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
339 thread-local storage (TLS) ABI on some platforms.
340 Changes by Ulrich Drepper. SH support by Kaz Kojima.
342 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
343 EUC-JISX0213, and TSCII.
345 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
346 BSD-compatible interface for getting all network interface addresses.
347 Implementation for IPv4 by Roland McGrath.
349 * Loading of locale data is faster due to the introduction of a locale
350 archive. Implemented by Roland McGrath and Ulrich Drepper.
352 * Startup times are significantly reduced by not using exported functions
353 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
354 and Ulrich Drepper.
356 * Steven Munroe contributed a port to PowerPC64/Linux.
357 \f
358 Version 2.2.6
360 * The Hurd now uses the GNU libio implementation of stdio rather than the
361 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
363 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
364 with the same behavior as the Linux system call of the same name.
365 \f
366 Version 2.2.5
368 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
369 128-bit long double format.
371 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
372 IBM1161, and IBM1162 charsets.
374 * Andreas Jaeger contributed a port to x86-64/Linux.
376 * Peter Bruin contributed a port to PowerPC/Hurd.
378 * libc functions using I/O streams now can handle wide-oriented streams
379 as well.
381 * optimizations in the dynamic linker. Binaries created by recent binutils
382 versions start up quicker due to reduced time spent on relocations.
384 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
385 \f
386 Version 2.2.4
388 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
389 asinh, atanh, j0 for the 128-bit long double format.
391 * Bruno Haible updated all the code handling Unicode in some form to
392 support Unicode 3.1.
394 * Speed of regex for single-byte locales is back to previous levels.
395 Patch by Isamu Hasegawa.
397 * Alpha, SPARC, and IA-64 now also using floating stacks.
399 * Startup time of internationalized applications greatly improved through
400 iconv cache. Use iconvconfig to generate the cache file.
401 Contributed by Ulrich Drepper.
403 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
404 severe performance problems. Patch by David Mosberger.
406 * The Hurd port got a lot more functionality like AIO, various stdio
407 extensions, etc. Mainly done by Roland McGrath.
409 * mtrace can now lookup symbols in shared libraries.
410 \f
411 Version 2.2.3
413 * Intel's IA-64 math library is largely integrated. It provides fast and
414 accurate implementatations for most basic and standard math functions
415 in float, double, and long double format.
417 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
418 and asin for the 96-bit long double format and asin, log, tan for the
419 128-bit long double format.
421 * The beginning of a last-bit accurate math library by IBM Haifa were added.
422 The basic double functions exist today. Contributed by Abraham Ziv
423 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
424 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
426 * An asynchronous name lookup library was added. The interface is designed
427 after POSIX AIO. The proposal was circulated beforehand to get comments.
428 No negative ones came in. Implemented by Ulrich Drepper.
430 * Port to S390/64bit contributed by Martin Schwidefsky
431 <schwidefsky@de.ibm.com>.
433 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
434 of functions for Linux/IA-64.
436 * The RPC code is now thread safe. Threads can now use the same service
437 of different services at the same time. Patch by Eric Norum
438 <eric.norum@usask.ca> with some help by Ulrich Drepper.
440 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
441 family of functions for Linux/S390.
443 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
444 of functions for Linux/x86.
446 * Port to Linux/CRIS contributed by Axis Communications.
447 \f
448 Version 2.2.2
450 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
451 we can now check for namespace violations and missing declarations. The
452 result is that almost all headers are now Unix-compliant (as defined in
453 the upcoming XPG6). The negative side is that some programs might need
454 corrections, too, if they depend on the incorrect form of the headers in
455 previous versions which defined too many symbols and included too many
456 other headers.
458 * regex now handles multibyte character sets correctly.
459 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
461 * iconv (the program) does now conform to the upcoming XPG6 and handles
462 charmaps. Instead of the charset names the path of charmaps can be
463 provided and the conversion happens based on this data.
464 Contributed by Ulrich Drepper.
466 * The locale program now provides detailed information about the installed
467 locales. While
469 locale -a
471 only lists the names of the supported locales
473 locale -a --verbose
475 provides details such as country, language, and codeset name.
476 Contributed by Ulrich Drepper.
477 \f
478 Version 2.2.1
480 * The gencat program now parses the input file according to the charset
481 selected by the LC_CTYPE category. This is important for stateful
482 character sets. To make generating catalogs easier there is a way
483 to overwrite the charset selected by the locale: before the first
484 message or $ quote line the catalog can contain a line like
486 $ codeset=ISO-8859-2
488 to select the charset (ISO-8859-2 in this case).
490 Implemented by Shinya Hanataka and Ulrich Drepper.
492 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
493 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
494 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
496 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
497 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
499 * The LANGUAGE environment variable is now ignored unless the locale is
500 changed from the default "C" locale.
502 * The usual bug fixes.
503 \f
504 Version 2.2
506 * Greg McGary added runtime support for bounds checking using gcc's
507 new -fbounded-pointers option. ix86 target is complete. PowerPC
508 is in progress.
510 * Thorsten Kukuk added secure mode support to nscd.
512 * The Berkeley db libraries have been removed.
514 Related, the nss_db module is now in a separate package since it
515 obviously requires a database library being available.
517 * Wide character I/O streams implemented by Ulrich Drepper.
519 * Functions from the extended socket API added by Ulrich Drepper.
521 * Functions feenableexcept and fedisableexcept to control the
522 behaviour of individual exceptions have been added by Andreas Jaeger.
524 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
526 * The resolver code has been updated from bind 8.2.3-T5B which supports
527 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
528 and Mark Kettenis.
530 This change could in some situations effect backward compatibility. Since
531 now `_res' is a thread-local instead of a global variable, modifying it
532 in one thread does not have any effect in other threads.
534 The resolver library was also extended to allow IPv6 as the transport
535 protocol for the requests. This work was done by Stig Venaas.
537 * Compatibility code for K&R C compilers has been removed from the
538 header files. A ISO C compiler is needed to use the library
539 (conforming to either C89 or C99 standard).
541 * Complete rewrite of the localedef program to support multibyte character
542 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
543 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
544 Implemented by Ulrich Drepper.
546 Bruno Haible significantly improved the generation and use of the data
547 structures for the wide character tables.
549 * Plural handling in gettext implemented by Ulrich Drepper.
551 * The utmp daemon has been removed.
553 * The port to MIPS-Linux has been finished by Andreas Jaeger.
555 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
556 and Yutaka Niibe.
558 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
560 * POSIX barriers implemented by Kaz Kylheku.
562 * POSIX spawn function family implemented by Ulrich Drepper.
564 * POSIX spinlocks are now available.
566 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
568 * the configure option --enable-kernel=X.Y.Z allows to strip out
569 compatibility for kernel versions before X.Y.Z. This is currently only
570 implemented for Linux.
572 * the sockaddr_in6 structure changed. The IPv6 working group added a new
573 field sin6_scope_id. This means that all programs using IPv6 should be
574 recompiled. Don't expect binary compatibility with previous glibc
575 versions.
577 * various conversion modules for IBM character sets contributed by
578 Masahide Washizawa.
580 * IA-64 port by Jes Sorensen and HJ Lu.
582 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
583 Compiling the GNU C Library for Linux/ia64
584 ******************************************
586 Please refer to the file INSTALL in the same directory as you found
587 this file for general information about configuring and compiling
588 glibc.
590 For general inquiries about glibc under Linux/ia64 please use the
591 following mailing list linux-ia64@linuxia64.org or one of the relevant
592 glibc mailing lists.
594 Recommended Tools for Compilation
595 =================================
597 In order for glibc-2.2 to build correctly on the ia64 you need at
598 least the following versions of the GNU tools (the :
600 * The Cygnus toolchain snapshot for the ia64 as of August 4
601 including the provided set of patches. It is however recommend
602 you use the October 24 toolchain snapshot or a more recent version.
604 OR alternatively you can try the following (the Cygnus toolchain is
605 the recommended solution):
607 * GCC and binutils, GAS and GNU LD out of CVS from
608 sources.redhat.com as of August 28, 2000 or later. The CVS tree
609 may require special patches to work properly on the ia64.
611 Configuring and compiling GNU Libc for Linux/ia64
612 =================================================
614 The library requires Linux kernel version 2.4.0-test4-000728 or
615 later to funtion properly. Besides that it support for debug libraries
616 is currently untested. Hence the following options
617 are required for configuring the library:
619 --disable-debug --enable-kernel=2.4.0
621 It is also important that you make sure the library picks up the
622 appropriate kernel header files, if you do not have recent enough
623 kernel headers in /usr/src/linux/include, you should use the
624 --with-headers=<path> option to specify the location.
626 As an example I personally use the following options to configure
627 the library:
629 --disable-debug
630 --disable-cvs
631 --enable-kernel=2.4.0
632 --host=ia64-linux
633 --enable-add-ons=yes
634 --prefix=/usr
635 --with-headers=/home/jes/linux/include
638 Good luck
640 Jes Sorensen <jes@linuxcare.com>,
641 November 14th, 2000
642 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
643 \f
644 Version 2.1.3
646 * bug fixes
648 \f
649 Version 2.1.2
651 * bug fixes
653 \f
654 Version 2.1.1
656 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
658 * New xdr functions are added; some rpc functions are now 64bit clean.
660 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
662 * Fixed known incompatibilities with glibc 2.0.
664 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
666 * Optimized a number of functions (especially the ELF dynamic loader).
668 * Update timezone data files.
670 * lots of charmaps corrections
672 * some new locale definitions and charmaps
674 \f
675 Version 2.1
677 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
678 conform to POSIX member type requirements. Symbol versions have been
679 adjusted as needed within the library, and for direct use by applications,
680 but there is potential for problems if third-party libraries use
681 struct timeval as part of their interface. This does not present
682 a problem for X and other "essential" system libraries.
684 * An additional locale model to support C++ Standard Library locale
685 model and probably more was implemented by Ulrich Drepper.
687 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
688 symbol level.
690 * Miles Bader provided the `argp' function family to support hierachical
691 command line argument parsing, layered on top of getopt.
693 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
695 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
696 numbers.
698 * scanf recognizes the %a and %A format for scanning floating point numbers.
700 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
701 information and interfaces for the available integer types.
703 * about 130 new math functions were added to implement the ISO C9x math
704 library.
706 * the new header <complex.h> contains definitions of the complex math
707 functions from ISO C 9X.
709 * the new header <tgmath.h> defines generic macros to use complex or
710 real valued functions.
712 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
714 * Andreas Jaeger provided a test suite for the math library.
716 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
718 * Ulrich Drepper added character set conversion functions (iconv).
720 * Optimized string functions have been added.
722 * The localedata addon is now part of glibc.
724 * An implementation of profiling shared libraries was added by Ulrich Drepper.
726 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
727 daemon for NSS (nscd).
729 Missing a better place here are some numbers on improvements. Under
730 Linux 2.1.125 un-tar-ing the kernel sources takes
732 user system wall
734 using local files 12.19s 6.88s 22.91s
736 using NIS 13.92s 8.91s 26.34s
738 using NIS & nscd 10.37s 7.34s 25.30s
740 using NIS+ 27.57s 30.37s 640.46s
742 using NIS+ & nscd 10.25s 7.83s 26.51s
744 using NIS & old nscd [1] 13.83s 8.32s 29.60s
746 Keep in mind that non-namelookup related operations dominate above times.
747 It was just a common complain that using NIS+ unpacking the kernel is
748 horribly slow.
750 [1] The old nscd implementation is not available anymore since it was
751 distributed with glibc up to version 2.0.98 and thus is now replaced.
753 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
755 * Mark Kettenis provided a Hesiod NSS module.
757 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
758 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
760 * rcmd can now handle netgroups (Dick Streefland).
762 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
763 Bambrough.
765 * Support for the IPv6 protocol has been added to the socket API, as per the
766 latest draft standards.
768 * Support for Linux 2.2 has been added.
770 * Interface changes relative to the latest 2.0.x release:
771 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
772 addseverity NEW: Unix98
773 alphasort64 NEW: LFS
774 argp_err_exit_status NEW: argp, GNU ext
775 argp_error NEW: argp, GNU ext
776 argp_failure NEW: argp, GNU ext
777 argp_help NEW: argp, GNU ext
778 argp_parse NEW: argp, GNU ext
779 argp_program_bug_address NEW: argp, GNU ext
780 argp_program_version NEW: argp, GNU ext
781 argp_program_version_hook NEW: argp, GNU ext
782 argp_state_help NEW: argp, GNU ext
783 argp_usage NEW: argp, GNU ext
784 authdes_create NEW: Secure RPC
785 authdes_getucred NEW: Secure RPC
786 authdes_pk_create NEW: Secure RPC
787 backtrace NEW: GNU ext.
788 backtrace_symbols NEW: GNU ext.
789 backtrace_symbols_fd NEW: GNU ext.
790 cacos NEW: ISO C 9x
791 cacosf NEW: ISO C 9x
792 cacosh NEW: ISO C 9x
793 cacoshf NEW: ISO C 9x
794 cacoshl NEW: ISO C 9x
795 cacosl NEW: ISO C 9x
796 capget NEW: kernel
797 capset NEW: kernel
798 carg NEW: ISO C 9x
799 cargf NEW: ISO C 9x
800 cargl NEW: ISO C 9x
801 casin NEW: ISO C 9x
802 casinf NEW: ISO C 9x
803 casinh NEW: ISO C 9x
804 casinhf NEW: ISO C 9x
805 casinhl NEW: ISO C 9x
806 casinl NEW: ISO C 9x
807 catan NEW: ISO C 9x
808 catanf NEW: ISO C 9x
809 catanh NEW: ISO C 9x
810 catanhf NEW: ISO C 9x
811 catanhl NEW: ISO C 9x
812 catanl NEW: ISO C 9x
813 cbc_crypt NEW: Secure RPC
814 ccos NEW: ISO C 9x
815 ccosf NEW: ISO C 9x
816 ccosh NEW: ISO C 9x
817 ccoshf NEW: ISO C 9x
818 ccoshl NEW: ISO C 9x
819 ccosl NEW: ISO C 9x
820 cexp NEW: ISO C 9x
821 cexpf NEW: ISO C 9x
822 cexpl NEW: ISO C 9x
823 cimag NEW: ISO C 9x
824 cimagf NEW: ISO C 9x
825 cimagl NEW: ISO C 9x
826 clearerr_locked REMOVED
827 clntunix_create NEW: sunrpc ext
828 clog NEW: ISO C 9x
829 clog10 NEW: ISO C 9x
830 clog10f NEW: ISO C 9x
831 clog10l NEW: ISO C 9x
832 clogf NEW: ISO C 9x
833 clogl NEW: ISO C 9x
834 conj NEW: ISO C 9x
835 conjf NEW: ISO C 9x
836 conjl NEW: ISO C 9x
837 cpow NEW: ISO C 9x
838 cpowf NEW: ISO C 9x
839 cpowl NEW: ISO C 9x
840 cproj NEW: ISO C 9x
841 cprojf NEW: ISO C 9x
842 cprojl NEW: ISO C 9x
843 creal NEW: ISO C 9x
844 crealf NEW: ISO C 9x
845 creall NEW: ISO C 9x
846 creat64 NEW: LFS
847 csin NEW: ISO C 9x
848 csinf NEW: ISO C 9x
849 csinh NEW: ISO C 9x
850 csinhf NEW: ISO C 9x
851 csinhl NEW: ISO C 9x
852 csinl NEW: ISO C 9x
853 csqrt NEW: ISO C 9x
854 csqrtf NEW: ISO C 9x
855 csqrtl NEW: ISO C 9x
856 ctan NEW: ISO C 9x
857 ctanf NEW: ISO C 9x
858 ctanh NEW: ISO C 9x
859 ctanhf NEW: ISO C 9x
860 ctanhl NEW: ISO C 9x
861 ctanl NEW: ISO C 9x
862 des_setparity NEW: Secure RPC
863 ecb_crypt NEW: Secure RPC
864 endutxent NEW: Unix98
865 exp10 NEW: ISO C 9x
866 exp10f NEW: ISO C 9x
867 exp10l NEW: ISO C 9x
868 exp2 NEW: ISO C 9x
869 exp2f NEW: ISO C 9x
870 exp2l NEW: ISO C 9x
871 fattach NEW: STREAMS
872 fdetach NEW: STREAMS
873 fdim NEW: ISO C 9x
874 fdimf NEW: ISO C 9x
875 fdiml NEW: ISO C 9x
876 feclearexcept NEW: ISO C 9x
877 fegetenv NEW: ISO C 9x
878 fegetexceptflag NEW: ISO C 9x
879 fegetround NEW: ISO C 9x
880 feholdexcept NEW: ISO C 9x
881 feof_locked REMOVED
882 feraiseexcept NEW: ISO C 9x
883 ferror_locked REMOVED
884 fesetenv NEW: ISO C 9x
885 fesetexceptflag NEW: ISO C 9x
886 fesetround NEW: ISO C 9x
887 fetestexcept NEW: ISO C 9x
888 feupdateenv NEW: ISO C 9x
889 fflush_locked REMOVED
890 ffsl NEW: GNU ext.
891 ffsll NEW: GNU ext.
892 fgetpos64 NEW: LFS
893 fgets_unlocked NEW: GNU ext.
894 fileno_locked REMOVED
895 fma NEW: ISO C 9x
896 fmaf NEW: ISO C 9x
897 fmal NEW: ISO C 9x
898 fmax NEW: ISO C 9x
899 fmaxf NEW: ISO C 9x
900 fmaxl NEW: ISO C 9x
901 fmin NEW: ISO C 9x
902 fminf NEW: ISO C 9x
903 fminl NEW: ISO C 9x
904 fmtmsg NEW: Unix98
905 fopen64 NEW: LFS
906 fputc_locked REMOVED
907 fputs_unlocked NEW: GNU ext.
908 fread_unlocked NEW: GNU ext.
909 freopen64 NEW: LFS
910 fseeko NEW: Unix98
911 fsetpos64 NEW: LFS
912 fstatfs64 NEW: LFS
913 fstatvfs NEW: Unix98
914 fstatvfs64 NEW: LFS
915 ftello NEW: Unix98
916 ftello64 NEW: LFS
917 ftruncate64 NEW: LFS
918 ftw64 NEW: LFS
919 fwrite_unlocked NEW: GNU ext.
920 gai_strerror NEW: IPv6
921 gamma_r REMOVED
922 gammaf_r REMOVED
923 gammal_r REMOVED
924 getchar_locked REMOVED
925 getdate NEW: Unix98
926 getdate_err NEW: Unix98
927 getdate_r NEW: GNU ext.
928 getmsg NEW: STREAMS
929 getnameinfo NEW: IPv6
930 getnetname NEW: Secure RPC
931 getpmsg NEW: STREAMS
932 getpt NEW: Unix98 PTY
933 getrlimit64 NEW: LFS
934 getutxent NEW: Unix98
935 getutxid NEW: Unix98
936 getutxline NEW: Unix98
937 glob64 NEW: GNU ext.
938 globfree64 NEW: GNU ext.
939 gnu_get_libc_release NEW: GNU ext.
940 gnu_get_libc_version NEW: GNU ext.
941 grantpt NEW: Unix98 PTY
942 host2netname NEW: Secure RPC
943 iconv NEW: iconv
944 iconv_close NEW: iconv
945 iconv_open NEW: iconv
946 if_freenameindex NEW: IPv6
947 if_indextoname NEW: IPv6
948 if_nameindex NEW: IPv6
949 if_nametoindex NEW: IPv6
950 in6addr_any NEW: IPv6
951 in6addr_loopback NEW: IPv6
952 inet6_isipv4mapped NEW: IPv6
953 isastream NEW: STREAMS
954 iswblank NEW: GNU ext.
955 key_decryptsession NEW: Secure RPC
956 key_decryptsession_pk NEW: Secure RPC
957 key_encryptsession NEW: Secure RPC
958 key_encryptsession_pk NEW: Secure RPC
959 key_gendes NEW: Secure RPC
960 key_get_conv NEW: Secure RPC
961 key_secretkey_is_set NEW: Secure RPC
962 key_setnet NEW: Secure RPC
963 key_setsecret NEW: Secure RPC
964 llrint NEW: ISO C 9x
965 llrintf NEW: ISO C 9x
966 llrintl NEW: ISO C 9x
967 llround NEW: ISO C 9x
968 llroundf NEW: ISO C 9x
969 llroundl NEW: ISO C 9x
970 log2 NEW: ISO C 9x
971 log2f NEW: ISO C 9x
972 log2l NEW: ISO C 9x
973 lrint NEW: ISO C 9x
974 lrintf NEW: ISO C 9x
975 lrintl NEW: ISO C 9x
976 lround NEW: ISO C 9x
977 lroundf NEW: ISO C 9x
978 lroundl NEW: ISO C 9x
979 lseek64 NEW: LFS
980 makecontext NEW: Unix98
981 mempcpy NEW: GNU ext.
982 mmap64 NEW: LFS
983 moncontrol REMOVED
984 modify_ldt NEW: kernel
985 nan NEW: ISO C 9x
986 nanf NEW: ISO C 9x
987 nanl NEW: ISO C 9x
988 nearbyint NEW: ISO C 9x
989 nearbyintf NEW: ISO C 9x
990 nearbyintl NEW: ISO C 9x
991 netname2host NEW: Secure RPC
992 netname2user NEW: Secure RPC
993 nexttoward NEW: ISO C 9x
994 nexttowardf NEW: ISO C 9x
995 nexttowardl NEW: ISO C 9x
996 nftw NEW: Unix98
997 nftw64 NEW: LFS
998 open64 NEW: LFS
999 passwd2des NEW: Secure RPC
1000 pow10 NEW: GNU ext.
1001 pow10f NEW: GNU ext.
1002 pow10l NEW: GNU ext.
1003 pread NEW: Unix98
1004 pread64 NEW: LFS
1005 printf_size NEW: GNU ext.
1006 printf_size_info NEW: GNU ext.
1007 profil_counter REMOVED
1008 pthread_mutexattr_getkind_np REPLACED
1009 pthread_mutexattr_setkind_np REPLACED
1010 ptsname NEW: Unix98 PTY
1011 ptsname_r NEW: Unix98 PTY
1012 putc_locked REMOVED
1013 putchar_locked REMOVED
1014 putgrent NEW: GNU ext.
1015 putmsg NEW: STREAMS
1016 putpmsg NEW: STREAMS
1017 pututxline NEW: Unix98
1018 pwrite NEW: Unix98
1019 pwrite64 NEW: LFS
1020 readdir64 NEW: LFS
1021 readdir64_r NEW: LFS
1022 remquo NEW: ISO C 9x
1023 remquof NEW: ISO C 9x
1024 remquol NEW: ISO C 9x
1025 round NEW: ISO C 9x
1026 roundf NEW: ISO C 9x
1027 roundl NEW: ISO C 9x
1028 rtime NEW: GNU ext.
1029 scalbln NEW: ISO C 9x
1030 scalblnf NEW: ISO C 9x
1031 scalblnl NEW: ISO C 9x
1032 scandir64 NEW: LFS
1033 sendfile NEW: kernel
1034 setcontext NEW: Unix98
1035 setrlimit64 NEW: LFS
1036 setutxent NEW: Unix98
1037 sighold NEW: Unix98
1038 sigignore NEW: Unix98
1039 sigqueue NEW: POSIX.1b
1040 sigrelse NEW: Unix98
1041 sigset NEW: POSIX.1b
1042 sigtimedwait NEW: POSIX.1b
1043 sigwaitinfo NEW: POSIX.1b
1044 sincos NEW: GNU ext.
1045 sincosf NEW: GNU ext.
1046 sincosl NEW: GNU ext.
1047 statfs64 NEW: LFS
1048 statvfs NEW: Unix98
1049 statvfs64 NEW: LFS
1050 strcasestr NEW: GNU ext.
1051 strtoimax NEW: ISO C 9x
1052 strtoumax NEW: ISO C 9x
1053 strverscmp NEW: GNU ext.
1054 svcauthdes_stats NEW: Secure RPC
1055 svcunix_create NEW: sunrpc etx
1056 svcunixfd_create NEW: sunrpc ext
1057 swapcontext NEW: Unix98
1058 tcgetsid NEW: Unix98 PTY
1059 tdestroy NEW: GNU ext.
1060 tgamma NEW: ISO C 9x
1061 tgammaf NEW: ISO C 9x
1062 tgammal NEW: ISO C 9x
1063 tmpfile64 NEW: LFS
1064 trunc NEW: ISO C 9x
1065 truncate64 NEW: LFS
1066 truncf NEW: ISO C 9x
1067 truncl NEW: ISO C 9x
1068 umount2 NEW: kernel
1069 unlockpt NEW: Unix98 PTY
1070 updwtmpx NEW: Unix98
1071 user2netname NEW: Secure RPC
1072 utmpxname NEW: Unix98
1073 versionsort NEW: GNU ext.
1074 versionsort64 NEW: GNU ext.
1075 waitid NEW: Unix98
1076 wcscasecmp NEW: GNU ext.
1077 wcsncasecmp NEW: GNU ext.
1078 wcsnlen NEW: GNU ext.
1079 wcstoimax NEW: ISO C 9x
1080 wcstoll NEW: ISO C 9x
1081 wcstoull NEW: ISO C 9x
1082 wcstoumax NEW: ISO C 9x
1083 wcswcs NEW: Unix98
1084 wordexp NEW: POSIX.2
1085 wordfree NEW: POSIX.2
1086 write_profiling REMOVED
1087 xdecrypt NEW: Secure RPC
1088 xdr_authdes_cred NEW: Secure RPC
1089 xdr_authdes_verf NEW: Secure RPC
1090 xdr_cryptkeyarg NEW: Secure RPC
1091 xdr_cryptkeyarg2 NEW: Secure RPC
1092 xdr_cryptkeyres NEW: Secure RPC
1093 xdr_getcredres NEW: Secure RPC
1094 xdr_key_netstarg NEW: Secure RPC
1095 xdr_key_netstres NEW: Secure RPC
1096 xdr_keybuf NEW: Secure RPC
1097 xdr_keystatus NEW: Secure RPC
1098 xdr_netnamestr NEW: Secure RPC
1099 xdr_sizeof NEW: Secure RPC
1100 xdr_unixcred NEW: sunrpc ext
1101 xencrypt NEW: Secure RPC
1102 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1103 \f
1104 Version 2.0.6
1106 * more bug fixes
1108 \f
1109 Version 2.0.5
1111 * more bug fixes
1113 * inet_ntoa is thread-safe
1115 * updwtmp is moved from libutil to libc
1117 * rewrite of cbrt function
1119 * update of timezone data
1120 \f
1121 Version 2.0.4
1123 * more bug fixes
1124 \f
1125 Version 2.0.3
1127 * more bug fixes
1128 \f
1129 Version 2.0.2
1131 * more bug fixes
1133 * add atoll function
1135 * fix complex problems in Berkeley DB code
1137 * fix math functions
1138 \f
1139 Version 2.0.1
1141 * fixed lots of header problems (especially Linux/GNU specific)
1143 * dynamic loader preserves all registers
1145 * Roland McGrath provided support for handling of auxiliary objects in
1146 the ELF dynamic loader.
1148 * support for parallel builds is improved
1149 \f
1150 Version 2.0
1152 * GNU extensions are no longer declared by default. To enable them you
1153 must define the macro `_GNU_SOURCE' in your program or compile with
1154 `-D_GNU_SOURCE'.
1156 * The library has changed from using GNU ld symbol aliases to using weak
1157 symbols where available. The ELF object file format supports weak
1158 symbols; GNU ld also supports weak symbols in the a.out format. (There
1159 is also now support for other GNU ld extensions in ELF. Use the
1160 `--with-elf' option to configure to indicate you have ELF, and
1161 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1162 of many files which contained only symbol aliases, reducing the size of
1163 the source and the compiled library; many other files were renamed to
1164 less cryptic names previously occupied by the symbol alias files.
1165 There is a new header file <elf.h> for programs which operate on
1166 files in the ELF format.
1168 * Converted to Autoconf version 2, so `configure' has more options.
1169 Run `configure --help' to see the details.
1171 * The library can now be configured to build profiling, highly-optimized
1172 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1173 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1174 `configure' enable building these extra libraries. The shared library is
1175 built by default when using both ELF and GNU ld. When shared libraries
1176 are enabled, the new library `-ldl' is available for arbitrary run-time
1177 loading of shared objects; its interface is defined in <dlfcn.h>. The
1178 new header file <link.h> gives access to the internals of the run-time
1179 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1180 application of same name on other systems and it provides information
1181 about dynamically linked binaries.
1183 * The C library now provides the run-time support code for profiling
1184 executables compiled with `-pg'. Programs can control the profiling code
1185 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1186 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1187 the support for this file format was contributed by David Mosberger-Tang.
1189 * The math code has been replaced with a math library based on fdlibm from
1190 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1191 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1192 functions. The math functions now reside in a separate library, so
1193 programs using them will need to use `-lm' their linking commands.
1195 * John C. Bowman contributed optimized ix87 assembler inline functions.
1197 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1198 mechanism similar to that found in Solaris 2. This is now used for the
1199 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1200 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1201 file controls what services are used for each individual database. This
1202 works by loading shared libraries with names specified in `nsswitch.conf',
1203 so service modules can be changed or added at any time without even
1204 relinking any program. Currently there are the file, db, and NIS based
1205 NSS services available.
1207 * The new functions `strtoq' and `strtouq' parse integer values from
1208 strings, like `strtol' and `strtoul', but they return `long long int' and
1209 `unsigned long long int' values, respectively (64-bit quantities).
1211 * The new functions `strtof' and `strtold' parse floating-point values from
1212 strings, like `strtod', but they return `float' and `long double' values,
1213 respectively (on some machines `double' and `long double' are the same).
1215 * Ulrich Drepper has contributed new implementations of the floating-point
1216 printing and reading code used in the `printf' family of functions and
1217 `strtod', `strtof', and `strtold'. These new functions are perfectly
1218 accurate, and much faster than the old ones.
1220 * The implementation of the POSIX locale model was completely rewritten by
1221 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1222 to compile the POSIX locale definition.
1224 * The former dummy implementations of the strcoll and strxfrm function are
1225 now replaced by fully functional code contributed by Ulrich Drepper. The
1226 collation information comes from the POSIX locale definitions.
1228 * The new header <langinfo.h> defines an interface for accessing
1229 various locale-dependent data (using the locale chosen with `setlocale').
1231 * Ulrich Drepper has contributed a new suite of functions for operation on
1232 wide-character and multibyte-character strings, in <wchar.h>;
1233 and classification and case conversion of wide characters, in <wctype.h>.
1234 These new functions are conforming to the ISO C, Amendement 1 specification.
1236 * There is now a second implementation of the standard I/O library available.
1237 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1238 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1240 * You can now use positional parameter specifications in format strings
1241 for the `printf' and `scanf' families of functions. For example,
1242 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1243 ``Number 6, Mr Jones''. This is mainly useful when providing different
1244 format strings for different languages, whose grammars may dictate
1245 different orderings of the values being printed. To support this
1246 feature, the interface for `register_printf_handler' has changed; see
1247 the header file <printf.h> for details.
1249 * The `printf' and `scanf' families of functions now understand a new
1250 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1251 to group numbers as indicated by the locale; for `scanf' and friends, this
1252 says to accept as valid only a number with all the proper grouping
1253 separators in the right places. In the default "C" locale, numbers are
1254 not grouped; but locales for specific countries will define the usual
1255 conventions (i.e. separate thousands with `,' in the US locale).
1257 * The pgrp functions have been regularized, slightly incompatibly but much
1258 less confusingly. The core functions are now `getpgid' and `setpgid',
1259 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1260 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1261 provided for compatibility. There is no longer an incompatible `getpgrp'
1262 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1264 * The new header file <fts.h> and suite of functions simplify programs that
1265 operate on directory trees. This code comes from 4.4 BSD.
1267 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1268 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1269 NSS scheme used in glibc.
1271 * There is a new malloc debugging hook `__memalign_hook'.
1273 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1274 `unsigned int' in <sys/types.h>. These are for compatibility only and
1275 their use is discouraged.
1277 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1278 done differently, so that it works even without GNU ld.
1280 * New function `euidaccess' checks allowed access to a file like `access',
1281 but using the effective IDs instead of the real IDs.
1283 * The time zone data files have been updated for the latest and greatest
1284 local time conventions of the countries of the world.
1286 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1287 see <dirent.h>.
1289 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1290 for formatting floating-point numbers. They are provided only for
1291 compatibility; new programs should use `sprintf' instead. There are
1292 also equivalent function for the `long double' floating-point type and
1293 all functions also exist in a reentrant form.
1295 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1296 functions for maintaining the login-record files (primarily of use to
1297 system programs such as `login'), and convenient functions for
1298 allocating and initializing a pseudo-terminal (pty) device.
1300 * Ulrich Drepper has contributed new support for System V style
1301 shared memory and IPC on systems that support it.
1303 * Ulrich Drepper has contributed several miscellaneous new functions found
1304 in System V: The `hsearch' family of functions provide an effective
1305 implementation of hash tables; `a64l' and `l64a' provide a very simple
1306 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1307 number generator.
1309 * Ulrich Drepper has contributed new reentrant counterparts for the
1310 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1312 * Ulrich Drepper has contributed new, highly-optimized versions of several
1313 string functions for the i486/Pentium family of processors.
1315 * Ulrich Drepper has updated the Linux-specific code, based largely
1316 on work done in Hongjiu Lu's version of GNU libc for Linux.
1317 The GNU library now supports Linux versions 2.0.10 and later,
1318 using the ELF object file format (i[3456]86-*-linux).
1320 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1322 * David Mosberger-Tang and Richard Henderson have ported the C library
1323 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1324 dynamic linking support for ELF/Alpha.
1326 * Richard Henderson contributed several Alpha optimized assembler function
1327 for arithmetic and string handling.
1329 * Ulrich Drepper has contributed a new set of message catalog functions to
1330 support multiple languages using the <libintl.h> interface, for use with
1331 his new package GNU gettext. Translation volunteers have contributed
1332 catalogs of the library's messages in Spanish, German, and Korean.
1334 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1335 program and the `catgets' function for reading the catalog files it
1336 creates. (The <libintl.h> interface is preferred; we include the
1337 <nl_types.h> interface using `catgets' only for source compatibility with
1338 programs already written to use it.)
1340 * New header file <values.h> gives SVID-compatible names for <limits.h>
1341 constants.
1343 * Various new macros, declarations, and small header files for compatibility
1344 with 4.4 BSD.
1346 * New function `group_member' is a convenient way to check if a process has
1347 a given effective group ID.
1349 * When using GCC 2.7 and later, the socket functions are now declared in a
1350 special way so that passing an argument of type `struct sockaddr_in *',
1351 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1352 `struct sockaddr *' type, does not generate a type-clash warning.
1354 * New function `error' declared in header file <error.h> is a convenient
1355 function for printing error messages and optionally exiting; this is the
1356 canonical function used in GNU programs. The new functions `err', `warn',
1357 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1358 doing the same thing.
1360 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1361 POSIX.2 `glob' function to do ~ and {...} expansion.
1363 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1364 `clearenv' which is used in POSIX.9 is also available.
1366 * New function `getsid' returns session ID number on systems that support it.
1368 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1369 files <db.h> and <mpool.h> provide a rich set of functions for several
1370 types of simple databases stored in memory and in files, and <ndbm.h> is
1371 an old `ndbm'-compatible interface using the `db' functions. Link with
1372 `-ldb' to get these functions.
1374 * New macro `strdupa' copies a string like `strdup', but uses local stack
1375 space from `alloca' instead of dynamic heap space from `malloc'.
1377 * New function `strnlen' is like `strlen' but searches only a given maximum
1378 number of characters for the null terminator. `stpncpy', `strndup' and
1379 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1380 function.
1382 * New function `statfs' in header <sys/statfs.h>.
1384 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1385 provide convenient functions for operating on blocks of null-terminated
1386 strings.
1388 * A new suite of functions in <utmp.h> handle all the details of reading
1389 and writing the utmp file.
1391 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1392 Thorsten Kukuk.
1394 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1395 completely POSIX compliant and also implemented the extended functionality
1396 to handle alternate digit representation and alternate era date formats.
1398 * Ulrich Drepper provided an implementation of the `strptime' function
1399 defined in XPG4.2 which transforms a string into a `struct tm' value.
1401 * Paul Eggert provided the tzselect shell script as part of the timezone
1402 code. The shell script makes it easy to select the correct timezone
1403 specification.
1405 * The implementation of the malloc family of functions is completely replaced
1406 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1407 The implementation uses the mmap function (if available) and it is
1408 optimized for the use in multi threaded programs.
1410 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1411 functions. This new functionality is usable by specifying a special
1412 salt string and it is compatible with implementation on *BSD systems.
1414 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1415 `getsubopt' to handle second level command line options, `bsd_signal'
1416 to access BSD style `signal' functionality, the obsolete `regexp' style
1417 expression matcher.
1419 * the `lchown' function is available on system which support this
1420 functionality.
1422 * The implementation of the shadow password handling function was contributed
1423 by Ulrich Drepper.
1425 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1427 * POSIX.1g support was added. The <sys/select.h> header is available,
1428 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1429 implementation of `getaddrinfo'.
1430 \f
1431 Version 1.09
1433 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1435 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1436 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1438 * The new function `daemon' from 4.4 BSD is useful for server programs that
1439 want to put themselves in the background.
1441 * Joel Sherrill has contributed support for several standalone boards that
1442 run without an operating system.
1444 * `printf', `scanf' and friends now accept a `q' type modifier for long
1445 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1447 * All of the code taken from BSD (notably most of the math and networking
1448 routines) has been updated from the BSD 4.4-Lite release.
1450 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1452 * The new functions `getdomainname' and `setdomainname' fetch or change the
1453 YP/NIS domain name. These are system calls which exist on systems which
1454 have YP (aka NIS).
1456 * The time zone data files have been updated for the latest international
1457 conventions.
1459 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1460 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1461 \f
1462 Version 1.08
1464 * The C library now includes support for Sun RPC, from Sun's free
1465 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1466 are included. (There is still no support for YP.)
1468 * Tom Quinn has contributed a port of the C library to SGI machines running
1469 Irix 4 (mips-sgi-irix4).
1471 * The new `lockf' function is a simplified interface to the locking
1472 facilities of `fcntl', included for compatibility.
1474 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1476 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1478 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1479 compatibility.
1481 * The error message printed by `assert' for a failed assertion now includes
1482 the name of the program (if using GNU ld) and the name of the calling
1483 function (with versions of GCC that support this).
1485 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1487 * The library now includes the <sys/mman.h> header file and memory
1488 management functions `mmap', `munmap', `mprotect', `msync', and
1489 `madvise', on systems that support those facilities.
1491 * The interface for `mcheck' has changed slightly: the function called to
1492 abort the program when an allocation inconsistency is detected now takes
1493 an argument that indicates the type of failure. The new function
1494 `mprobe' lets you request a consistency check for a particular block at
1495 any time (checks are normally done only when you call `free' or `realloc'
1496 on a block).
1498 * It is now possible to easily cross-compile the C library, building on one
1499 system a library to run on another machine and/or operating system. All
1500 you need to do is set the variable `HOST_CC' in `configparms' to the
1501 native compiler for programs to run on the machine you are building on (a
1502 few generator programs are used on Unix systems); set `CC' to the
1503 cross-compiler.
1505 * The new function `fexecve' (only implemented on the GNU system) executes
1506 a program file given a file descriptor already open on the file.
1507 \f
1508 Version 1.07
1510 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1511 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1513 * You can set the variable `libprefix' in `configparms' to specify a prefix
1514 to be prepended to installed library files; this makes it easy to install
1515 the GNU C library to be linked as `-lgnuc' or whatever.
1517 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1518 copies a limited number of characters from a string, and returns the
1519 address of the last character written.
1521 * You no longer need to check for whether the installed `stddef.h' is
1522 compatible with the GNU C library. configure now checks for you.
1524 * You can now define a per-stream `fileno' function to convert the
1525 stream's cookie into an integral file descriptor.
1527 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1528 allocates zero bytes of storage, and returns a unique pointer which
1529 you can pass to `realloc' or `free'. The behavior is undefined if
1530 you dereference this pointer.
1532 * The C library now runs on Sony NEWS m68k machines running either
1533 NewsOS 3 or NewsOS 4.
1535 * The new `syscall' function is a system-dependent primitive function
1536 for invoking system calls. It has the canonical behavior on Unix
1537 systems, including unreliable return values for some calls (such as
1538 `pipe', `fork' and `getppid').
1540 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1541 to `EAGAIN', which is the preferred name. On systems whose kernels
1542 use two distinct codes, the C library now translates EWOULDBLOCK to
1543 EAGAIN in every system call function.
1544 \f
1545 Version 1.06
1547 * The GNU C Library Reference Manual is now distributed with the library.
1548 `make dvi' will produce a DVI file of the printed manual.
1549 `make info' will produce Info files that you can read on line using C-h i
1550 in Emacs or the `info' program.
1551 Please send comments on the manual to bug-glibc-manual@gnu.org.
1553 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1555 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1557 * Jason Merrill has contributed a port to the Sequent Symmetry running
1558 Dynix version 3 (i386-sequent-dynix).
1560 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1561 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1563 * New function `memory_warnings' lets you arrange to get warnings when
1564 malloc is running out of memory to allocate, like Emacs gives you.
1566 * The C library now contains the relocating allocator used in Emacs 19 for
1567 its editing buffers. This allocator (ralloc) minimizes allocation
1568 overhead and fragmentation by moving allocated regions around whenever it
1569 needs to. You always refer to a ralloc'd region with a "handle" (a
1570 pointer to a pointer--an object of type `void **').
1572 * There is a new `printf' format: `%m' gives you the string corresponding
1573 to the error code in `errno'.
1575 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1576 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1577 pass, the `a' modifier says to fill in a `char **' you pass with a
1578 malloc'd string.
1580 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1581 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1582 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1584 * `mkstemp' is a traditional Unix function to atomically create and open a
1585 uniquely-named temporary file.
1586 \f
1587 Version 1.05
1589 * The standard location for the file that says what the local timezone is
1590 has changed again. It is now `/usr/local/etc/localtime' (or more
1591 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1593 * The distribution no longer contains any files with names longer than 14
1594 characters.
1596 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1597 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1599 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1600 \f
1601 Version 1.04
1603 * The configuration process has changed quite a bit. The `configure'
1604 script is now used just like the configuration scripts for other GNU
1605 packages. The `sysdeps' directory hierarchy is much rearranged.
1606 The file `INSTALL' explains the new scheme in detail.
1608 * The header files no longer need to be processed into ANSI C and
1609 traditional C versions. There is just one set of files to install, and
1610 it will work with ANSI or old C compilers (including `gcc -traditional').
1612 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1613 MIPS DECStation running Ultrix 4.
1615 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1616 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1617 made itself into a shared library.
1619 * Yet further improved support for the i386, running 4.3 BSD-like systems
1620 (such as Mach 3 with the Unix single-server), or System V.
1622 * New function `strncasecmp' to do case-insensitive string comparison
1623 with limited length.
1625 * New function `strsep' is a reentrant alternative to `strtok'.
1627 * New functions `scandir' and `alphasort' for searching directories.
1629 * New function `setenv' is a better interface to `putenv'.
1631 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1632 function for traversing a directory tree.
1634 * The GNU obstack package is now also part of the C library.
1635 The new function `open_obstack_stream' creates a stdio stream that
1636 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1637 formatted output directly to an obstack.
1639 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1640 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1642 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1644 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1645 things to your strings.
1647 * There are some new test programs: test-fseek, testmb, and testrand.
1649 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1650 These ports are not finished, but are a good starting place for really
1651 supporting those systems.
1653 * `/etc/localtime' is now the standard location for the file that says what
1654 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1655 This follows the general principle that `/etc' is the place for all local
1656 configuration files.
1658 * The C library header files now use `extern "C"' when used by the C++
1659 compiler, so the C library should now work with C++ code.
1661 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1662 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
1663 in <strings.h>.)
1665 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1666 function which uses the `merge sort' algorithm, and is said to be
1667 significantly faster than the old GNU `qsort' function. Merge sort is
1668 now the standard `qsort' function. The new algorithm can require a lot
1669 of temporary storage; so, the old sorting function is called when the
1670 required storage is not available.
1672 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1673 provides the Unix `crypt' function, plus some other entry points.
1675 * The code and header files taken from 4.4 BSD have been updated with the
1676 latest files released from Berkeley.
1677 \f
1678 ----------------------------------------------------------------------
1679 Copyright information:
1681 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1682 Free Software Foundation, Inc.
1684 Permission is granted to anyone to make or distribute verbatim copies
1685 of this document as received, in any medium, provided that the
1686 copyright notice and this permission notice are preserved,
1687 thus giving the recipient permission to redistribute in turn.
1689 Permission is granted to distribute modified versions
1690 of this document, or of portions of it,
1691 under the above conditions, provided also that they
1692 carry prominent notices stating who last changed them.
1693 \f
1694 Local variables:
1695 version-control: never
1696 End: