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1 GNU C Library NEWS -- history of user-visible changes. 2009-2-25
2 Copyright (C) 1992-2008, 2009 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 2.10
10 * New Linux interface: accept4
12 * Correct declarations of string function when used in C++ code. This
13 could lead to compile error for invalid C++ code.
15 * XPG7/POSIX 2008 compilation environment.
17 \f
18 Version 2.9
20 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
21 up at the same time. Implemented by Ulrich Drepper.
23 * TLS descriptors for LD and GD on x86 and x86-64.
24 Implemented by Alexandre Oliva.
26 * getaddrinfo now handles DCCP and UDPlite.
27 Implemented by Ulrich Drepper.
29 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
30 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
31 Implemented by Ulrich Drepper.
33 * New implementation of memmem, strstr, and strcasestr which is O(n).
34 Implemented by Eric Blake.
36 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
38 * Implement "e" option for popen to open file descriptor with the
39 close-on-exec flag set. Implemented by Ulrich Drepper.
41 * Implement "b" mode for fmemopen. In this mode writes writes don't
42 implicitly add a NUL byte and seeks from the end of the buffer really
43 use the buffer end, not the string length as the basis.
44 Implemented by Ulrich Drepper.
46 * Many functions, exported and internal, now atomically set the close-on-exec
47 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
49 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
50 Sinhala)
51 Implemented by Pravin Satpute.
53 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
54 \f
55 Version 2.8
57 * New locales: bo_CN, bo_IN, shs_CA.
59 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
61 * Sorting rules for some Indian languages (Devanagari and Gujarati).
62 Implemented by Pravin Satpute.
64 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
66 * nscd caches now all timeouts for DNS entries
67 Implemented by Ulrich Drepper.
69 * nscd is more efficient and wakes up less often.
70 Implemented by Ulrich Drepper.
72 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
73 vdprintf, and obstack_vprintf.
74 Implemented by Jakub Jelinek.
76 * Faster memset for x86-64.
77 Implemented by Harsha Jagasia and H.J. Lu.
79 * Faster memcpy on x86.
80 Implemented by Ulrich Drepper.
82 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
83 Implemented by Ulrich Drepper.
85 * Faster sqrt and sqrtf implemention for some PPC variants.
86 Implemented by Stephen Munroe.
87 \f
88 Version 2.7
90 * More checking functions: fread, fread_unlocked, open*, mq_open.
91 Implemented by Jakub Jelinek and Ulrich Drepper.
93 * Extend fortification to C++. Implemented by Jakub Jelinek.
95 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
96 by not recognizing 'a' as a modifier when those specs are requested.
97 Implemented by Jakub Jelinek.
99 * PPC optimizations to math and string functions.
100 Implemented by Steven Munroe.
102 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
103 options to be passed. Implemented by Ulrich Drepper.
105 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
107 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
108 Implemented by Ulrich Drepper.
110 * Handle private futexes in the NPTL implementation.
111 Implemented by Jakub Jelinek and Ulrich Drepper.
113 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
114 Implemented by Roland McGrath and Ulrich Drepper.
116 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
118 * SHA-256 and SHA-512 based password encryption.
119 Implemented by Ulrich Drepper.
121 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
122 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
123 yo_NG.
125 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
126 Implemented by Ulrich Drepper.
127 \f
128 Version 2.6
130 * New Linux interfaces: epoll_pwait, sched_getcpu.
132 * New generic interfaces: strerror_l.
134 * nscd can now cache the services database. Implemented by Ulrich Drepper.
136 \f
137 Version 2.5
139 * For Linux, the sorting of addresses returned by getaddrinfo now also
140 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
141 Implemented by Ulrich Drepper.
143 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
144 Implemented by Ulrich Drepper.
146 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
148 * New iconv module for MIK. Contributed by Alexander Shopov.
150 * For sites with broken group and/or passwd database, the auto-propagate
151 option of nscd can prevent creating ID lookup entries from the results
152 of a name lookup and vice versa. This usually is no problem but some
153 site might have problems with the default behavior.
154 Implemented by Ulrich Drepper.
156 * Iterating over entire database in NIS can be slow. With the
157 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
158 to trade time for memory. The entire database will be read at once.
159 Implemented by Ulrich Drepper.
161 * The interfaces introduced in RFC 3542 have been implemented by
162 Ulrich Drepper.
164 * Support for the new ELF hash table format was added by Ulrich Drepper.
166 * Support for priority inheritance mutexes added by Jakub Jelinek and
167 Ulrich Drepper.
169 * Support for priority protected mutexes added by Jakub Jelinek.
171 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
172 or_IN, csb_PL, fy_NL, sr_ME.
173 \f
174 Version 2.4
176 * More overflow detection functions.
178 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
179 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
181 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
182 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
183 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
184 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
185 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
186 by Masahide Washizawa.
188 * It is now possible to install audit libraries for the dynamic linker using
189 LD_AUDIT. Implemented by Ulrich Drepper.
191 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
192 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
193 For a libc and libpthread that works well on Linux 2.4 kernels, we
194 recommend using the stable 2.3 branch.
196 * The new function open_wmemstream acts like open_memstream,
197 but uses a wchar_t wide character buffer.
199 * The new function ppoll is an improved version of poll, similar to pselect.
201 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
202 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
203 renameat, unlinkat, linkat, symlinkat, readlinkat.
205 * New Linux kernel system calls: unshare,
206 inotify_init, inotify_add_watch, inotify_rm_watch.
208 * The euidaccess function is now also known by the alias eaccess,
209 for compatibility with some other systems.
211 * Timezone data updated to 2006b version.
212 \f
213 Version 2.3.6
215 * The following bugs are resolved with this release:
217 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
218 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
219 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
220 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
221 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
222 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
224 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
226 * As of this release, GCC 4 can be used to compile the C Library.
228 * Timezone data updated to 2005m version.
229 \f
230 Version 2.3.5
232 * The following bugs are resolved with this release:
234 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
235 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
236 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
237 777, 787, 821, 822, 823, 825
239 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
240 \f
241 Version 2.3.4
243 * Support for RFC 3678. Real implementations exist only for Linux so far.
244 Implemented by Ulrich Drepper.
246 * nscd can now cache entries persistently. Expiring entries are reloaded.
247 For speedups the cache can be shared in memory with client processes.
248 Implemented by Ulrich Drepper.
250 * nscd can now perform SELinux checks.
251 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
253 * getaddrinfo queries are now cached. Canonical name lookup is performed
254 efficiently.
255 Implemented by Ulrich Drepper.
257 * The nothrow function attribute is used when headers are used by gcc when
258 compiling C code. This can avoid significant amounts of exception
259 handling data.
261 * The malloc functions perform more error checking and are stricter when
262 it comes to reacting on errors. The default action is to terminate
263 the process after showing an error message. Implemented by Ulrich Drepper.
265 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
266 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
268 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
269 namespaces using the new function dlmopen(). This feature is of course,
270 like most other dynamic loading functionality, not available in statically
271 linked applications. Implemented by Ulrich Drepper.
273 * Low-overhead boundary checking variants of string and some stdio functions
274 were added. These are to be used in conjunction with a gcc patch by
275 Jakub Jelinek which adds calls to these functions if possible.
276 Implemented by Jakub Jelinek and Ulrich Drepper.
278 * Old code for several operating systems and machine architectures that
279 have not been in working condition in a long time have been removed from
280 the main source tree maintained by the GNU C Library's maintainers.
281 These files are now reside in the separate `ports' source module
282 that is usable as an add-on when building the library.
283 \f
284 Version 2.3.3
286 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
287 interrogate the dynamic linker, compatible with the Solaris interface.
289 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
290 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
292 * getifaddrs now uses the netlink interface on Linux to get its information.
293 Implemented by Thorsten Kukuk.
295 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
296 Implemented by Ulrich Drepper.
298 * support for non-executable stacks on x86 has been added. Changes mostly
299 by Roland McGrath.
301 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
302 and Ulrich Drepper.
304 * getaddrinfo now performs destination address selection according to
305 RFC 3484.
306 \f
307 Version 2.3.2
309 * Thread-safe interfaces for many functions that access locale data
310 were added in version 2.3, but these features were omitted from NEWS.
311 Many functions have variants with an `_l' suffix that take a `locale_t'
312 object as a parameter rather than consulting the current locale.
313 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
314 create and maintain `locale_t' objects. Additionally, the new function
315 `uselocale' sets "the current locale" (as used by functions not so
316 parameterized) set for an individual thread. These features were added
317 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
319 * The functions getresuid, getresgid, setresuid, and setresgid, which
320 have long been available on Linux, are now declared in <unistd.h>
321 and are now also available on the Hurd.
323 * ELF thread-local storage support (TLS) now works on x86-64.
325 * The new dynamic string token $LIB is expanded in shared library names.
326 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
328 * Aldy Hernandez contributed complete software floating point support for
329 PowerPC machines with no FPU.
331 * fexecve is implemented on Linux.
333 * The `btowc' function should work at least twice as fast due to
334 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
336 * With approriate thread add-ons cancelable functions are now implemented
337 in libc.so as well. No need to call the function in libpthread. This
338 change allowed to finally disable the incorrect and expensive handling
339 of weak definition in ld.so.
341 * Yet more PLT entries in libc.so have been removed. We finally arrived
342 at the bare minimum. Startup times improved appropriately.
344 * Support for the new Linux/x86 system call interface was added. The
345 AT_SYSINFO auxiliary vector entry is recognized and handled.
346 \f
347 Version 2.3
349 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
350 charsets.
352 * iconv (the program and the interface) now accepts empty names (excluding
353 options like //TRANSLIT) to mean "use charset of current locale".
355 * localedef can now transliterate characters in strings which are not in
356 the provided charmap. The information from the input locale is used.
358 * Prelinking support was added for ELF targets. This requires additional
359 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
361 * Read-only stdio streams now use mmap to speed up operation by eliminating
362 copying and buffer underflows. To use add 'm' to the mode string of
363 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
365 * The malloc functions were completely rewritten by Wolfram Gloger based
366 on Doug Lea's malloc-2.7.0.c.
368 * Isamu Hasegawa contributed a completely new and POSIX-conformant
369 implementation of regex.
371 * Bruno Haible upgraded the iconv and locale implementation to support
372 Unicode 3.2.
374 * Contents of the LC_* and LANG environment variables in the CEN style are
375 not recognized anymore. It never was used. Change by Ulrich Drepper.
377 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
378 thread-local storage (TLS) ABI on some platforms.
379 Changes by Ulrich Drepper. SH support by Kaz Kojima.
381 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
382 EUC-JISX0213, and TSCII.
384 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
385 BSD-compatible interface for getting all network interface addresses.
386 Implementation for IPv4 by Roland McGrath.
388 * Loading of locale data is faster due to the introduction of a locale
389 archive. Implemented by Roland McGrath and Ulrich Drepper.
391 * Startup times are significantly reduced by not using exported functions
392 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
393 and Ulrich Drepper.
395 * Steven Munroe contributed a port to PowerPC64/Linux.
396 \f
397 Version 2.2.6
399 * The Hurd now uses the GNU libio implementation of stdio rather than the
400 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
402 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
403 with the same behavior as the Linux system call of the same name.
404 \f
405 Version 2.2.5
407 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
408 128-bit long double format.
410 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
411 IBM1161, and IBM1162 charsets.
413 * Andreas Jaeger contributed a port to x86-64/Linux.
415 * Peter Bruin contributed a port to PowerPC/Hurd.
417 * libc functions using I/O streams now can handle wide-oriented streams
418 as well.
420 * optimizations in the dynamic linker. Binaries created by recent binutils
421 versions start up quicker due to reduced time spent on relocations.
423 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
424 \f
425 Version 2.2.4
427 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
428 asinh, atanh, j0 for the 128-bit long double format.
430 * Bruno Haible updated all the code handling Unicode in some form to
431 support Unicode 3.1.
433 * Speed of regex for single-byte locales is back to previous levels.
434 Patch by Isamu Hasegawa.
436 * Alpha, SPARC, and IA-64 now also using floating stacks.
438 * Startup time of internationalized applications greatly improved through
439 iconv cache. Use iconvconfig to generate the cache file.
440 Contributed by Ulrich Drepper.
442 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
443 severe performance problems. Patch by David Mosberger.
445 * The Hurd port got a lot more functionality like AIO, various stdio
446 extensions, etc. Mainly done by Roland McGrath.
448 * mtrace can now lookup symbols in shared libraries.
449 \f
450 Version 2.2.3
452 * Intel's IA-64 math library is largely integrated. It provides fast and
453 accurate implementatations for most basic and standard math functions
454 in float, double, and long double format.
456 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
457 and asin for the 96-bit long double format and asin, log, tan for the
458 128-bit long double format.
460 * The beginning of a last-bit accurate math library by IBM Haifa were added.
461 The basic double functions exist today. Contributed by Abraham Ziv
462 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
463 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
465 * An asynchronous name lookup library was added. The interface is designed
466 after POSIX AIO. The proposal was circulated beforehand to get comments.
467 No negative ones came in. Implemented by Ulrich Drepper.
469 * Port to S390/64bit contributed by Martin Schwidefsky
470 <schwidefsky@de.ibm.com>.
472 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
473 of functions for Linux/IA-64.
475 * The RPC code is now thread safe. Threads can now use the same service
476 of different services at the same time. Patch by Eric Norum
477 <eric.norum@usask.ca> with some help by Ulrich Drepper.
479 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
480 family of functions for Linux/S390.
482 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
483 of functions for Linux/x86.
485 * Port to Linux/CRIS contributed by Axis Communications.
486 \f
487 Version 2.2.2
489 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
490 we can now check for namespace violations and missing declarations. The
491 result is that almost all headers are now Unix-compliant (as defined in
492 the upcoming XPG6). The negative side is that some programs might need
493 corrections, too, if they depend on the incorrect form of the headers in
494 previous versions which defined too many symbols and included too many
495 other headers.
497 * regex now handles multibyte character sets correctly.
498 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
500 * iconv (the program) does now conform to the upcoming XPG6 and handles
501 charmaps. Instead of the charset names the path of charmaps can be
502 provided and the conversion happens based on this data.
503 Contributed by Ulrich Drepper.
505 * The locale program now provides detailed information about the installed
506 locales. While
508 locale -a
510 only lists the names of the supported locales
512 locale -a --verbose
514 provides details such as country, language, and codeset name.
515 Contributed by Ulrich Drepper.
516 \f
517 Version 2.2.1
519 * The gencat program now parses the input file according to the charset
520 selected by the LC_CTYPE category. This is important for stateful
521 character sets. To make generating catalogs easier there is a way
522 to overwrite the charset selected by the locale: before the first
523 message or $ quote line the catalog can contain a line like
525 $ codeset=ISO-8859-2
527 to select the charset (ISO-8859-2 in this case).
529 Implemented by Shinya Hanataka and Ulrich Drepper.
531 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
532 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
533 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
535 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
536 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
538 * The LANGUAGE environment variable is now ignored unless the locale is
539 changed from the default "C" locale.
541 * The usual bug fixes.
542 \f
543 Version 2.2
545 * Greg McGary added runtime support for bounds checking using gcc's
546 new -fbounded-pointers option. ix86 target is complete. PowerPC
547 is in progress.
549 * Thorsten Kukuk added secure mode support to nscd.
551 * The Berkeley db libraries have been removed.
553 Related, the nss_db module is now in a separate package since it
554 obviously requires a database library being available.
556 * Wide character I/O streams implemented by Ulrich Drepper.
558 * Functions from the extended socket API added by Ulrich Drepper.
560 * Functions feenableexcept and fedisableexcept to control the
561 behaviour of individual exceptions have been added by Andreas Jaeger.
563 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
565 * The resolver code has been updated from bind 8.2.3-T5B which supports
566 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
567 and Mark Kettenis.
569 This change could in some situations effect backward compatibility. Since
570 now `_res' is a thread-local instead of a global variable, modifying it
571 in one thread does not have any effect in other threads.
573 The resolver library was also extended to allow IPv6 as the transport
574 protocol for the requests. This work was done by Stig Venaas.
576 * Compatibility code for K&R C compilers has been removed from the
577 header files. A ISO C compiler is needed to use the library
578 (conforming to either C89 or C99 standard).
580 * Complete rewrite of the localedef program to support multibyte character
581 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
582 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
583 Implemented by Ulrich Drepper.
585 Bruno Haible significantly improved the generation and use of the data
586 structures for the wide character tables.
588 * Plural handling in gettext implemented by Ulrich Drepper.
590 * The utmp daemon has been removed.
592 * The port to MIPS-Linux has been finished by Andreas Jaeger.
594 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
595 and Yutaka Niibe.
597 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
599 * POSIX barriers implemented by Kaz Kylheku.
601 * POSIX spawn function family implemented by Ulrich Drepper.
603 * POSIX spinlocks are now available.
605 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
607 * the configure option --enable-kernel=X.Y.Z allows to strip out
608 compatibility for kernel versions before X.Y.Z. This is currently only
609 implemented for Linux.
611 * the sockaddr_in6 structure changed. The IPv6 working group added a new
612 field sin6_scope_id. This means that all programs using IPv6 should be
613 recompiled. Don't expect binary compatibility with previous glibc
614 versions.
616 * various conversion modules for IBM character sets contributed by
617 Masahide Washizawa.
619 * IA-64 port by Jes Sorensen and HJ Lu.
621 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
622 Compiling the GNU C Library for Linux/ia64
623 ******************************************
625 Please refer to the file INSTALL in the same directory as you found
626 this file for general information about configuring and compiling
627 glibc.
629 For general inquiries about glibc under Linux/ia64 please use the
630 following mailing list linux-ia64@linuxia64.org or one of the relevant
631 glibc mailing lists.
633 Recommended Tools for Compilation
634 =================================
636 In order for glibc-2.2 to build correctly on the ia64 you need at
637 least the following versions of the GNU tools (the :
639 * The Cygnus toolchain snapshot for the ia64 as of August 4
640 including the provided set of patches. It is however recommend
641 you use the October 24 toolchain snapshot or a more recent version.
643 OR alternatively you can try the following (the Cygnus toolchain is
644 the recommended solution):
646 * GCC and binutils, GAS and GNU LD out of CVS from
647 sources.redhat.com as of August 28, 2000 or later. The CVS tree
648 may require special patches to work properly on the ia64.
650 Configuring and compiling GNU Libc for Linux/ia64
651 =================================================
653 The library requires Linux kernel version 2.4.0-test4-000728 or
654 later to funtion properly. Besides that it support for debug libraries
655 is currently untested. Hence the following options
656 are required for configuring the library:
658 --disable-debug --enable-kernel=2.4.0
660 It is also important that you make sure the library picks up the
661 appropriate kernel header files, if you do not have recent enough
662 kernel headers in /usr/src/linux/include, you should use the
663 --with-headers=<path> option to specify the location.
665 As an example I personally use the following options to configure
666 the library:
668 --disable-debug
669 --disable-cvs
670 --enable-kernel=2.4.0
671 --host=ia64-linux
672 --enable-add-ons=yes
673 --prefix=/usr
674 --with-headers=/home/jes/linux/include
677 Good luck
679 Jes Sorensen <jes@linuxcare.com>,
680 November 14th, 2000
681 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
682 \f
683 Version 2.1.3
685 * bug fixes
687 \f
688 Version 2.1.2
690 * bug fixes
692 \f
693 Version 2.1.1
695 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
697 * New xdr functions are added; some rpc functions are now 64bit clean.
699 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
701 * Fixed known incompatibilities with glibc 2.0.
703 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
705 * Optimized a number of functions (especially the ELF dynamic loader).
707 * Update timezone data files.
709 * lots of charmaps corrections
711 * some new locale definitions and charmaps
713 \f
714 Version 2.1
716 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
717 conform to POSIX member type requirements. Symbol versions have been
718 adjusted as needed within the library, and for direct use by applications,
719 but there is potential for problems if third-party libraries use
720 struct timeval as part of their interface. This does not present
721 a problem for X and other "essential" system libraries.
723 * An additional locale model to support C++ Standard Library locale
724 model and probably more was implemented by Ulrich Drepper.
726 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
727 symbol level.
729 * Miles Bader provided the `argp' function family to support hierachical
730 command line argument parsing, layered on top of getopt.
732 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
734 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
735 numbers.
737 * scanf recognizes the %a and %A format for scanning floating point numbers.
739 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
740 information and interfaces for the available integer types.
742 * about 130 new math functions were added to implement the ISO C9x math
743 library.
745 * the new header <complex.h> contains definitions of the complex math
746 functions from ISO C 9X.
748 * the new header <tgmath.h> defines generic macros to use complex or
749 real valued functions.
751 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
753 * Andreas Jaeger provided a test suite for the math library.
755 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
757 * Ulrich Drepper added character set conversion functions (iconv).
759 * Optimized string functions have been added.
761 * The localedata addon is now part of glibc.
763 * An implementation of profiling shared libraries was added by Ulrich Drepper.
765 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
766 daemon for NSS (nscd).
768 Missing a better place here are some numbers on improvements. Under
769 Linux 2.1.125 un-tar-ing the kernel sources takes
771 user system wall
773 using local files 12.19s 6.88s 22.91s
775 using NIS 13.92s 8.91s 26.34s
777 using NIS & nscd 10.37s 7.34s 25.30s
779 using NIS+ 27.57s 30.37s 640.46s
781 using NIS+ & nscd 10.25s 7.83s 26.51s
783 using NIS & old nscd [1] 13.83s 8.32s 29.60s
785 Keep in mind that non-namelookup related operations dominate above times.
786 It was just a common complain that using NIS+ unpacking the kernel is
787 horribly slow.
789 [1] The old nscd implementation is not available anymore since it was
790 distributed with glibc up to version 2.0.98 and thus is now replaced.
792 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
794 * Mark Kettenis provided a Hesiod NSS module.
796 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
797 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
799 * rcmd can now handle netgroups (Dick Streefland).
801 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
802 Bambrough.
804 * Support for the IPv6 protocol has been added to the socket API, as per the
805 latest draft standards.
807 * Support for Linux 2.2 has been added.
809 * Interface changes relative to the latest 2.0.x release:
810 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
811 addseverity NEW: Unix98
812 alphasort64 NEW: LFS
813 argp_err_exit_status NEW: argp, GNU ext
814 argp_error NEW: argp, GNU ext
815 argp_failure NEW: argp, GNU ext
816 argp_help NEW: argp, GNU ext
817 argp_parse NEW: argp, GNU ext
818 argp_program_bug_address NEW: argp, GNU ext
819 argp_program_version NEW: argp, GNU ext
820 argp_program_version_hook NEW: argp, GNU ext
821 argp_state_help NEW: argp, GNU ext
822 argp_usage NEW: argp, GNU ext
823 authdes_create NEW: Secure RPC
824 authdes_getucred NEW: Secure RPC
825 authdes_pk_create NEW: Secure RPC
826 backtrace NEW: GNU ext.
827 backtrace_symbols NEW: GNU ext.
828 backtrace_symbols_fd NEW: GNU ext.
829 cacos NEW: ISO C 9x
830 cacosf NEW: ISO C 9x
831 cacosh NEW: ISO C 9x
832 cacoshf NEW: ISO C 9x
833 cacoshl NEW: ISO C 9x
834 cacosl NEW: ISO C 9x
835 capget NEW: kernel
836 capset NEW: kernel
837 carg NEW: ISO C 9x
838 cargf NEW: ISO C 9x
839 cargl NEW: ISO C 9x
840 casin NEW: ISO C 9x
841 casinf NEW: ISO C 9x
842 casinh NEW: ISO C 9x
843 casinhf NEW: ISO C 9x
844 casinhl NEW: ISO C 9x
845 casinl NEW: ISO C 9x
846 catan NEW: ISO C 9x
847 catanf NEW: ISO C 9x
848 catanh NEW: ISO C 9x
849 catanhf NEW: ISO C 9x
850 catanhl NEW: ISO C 9x
851 catanl NEW: ISO C 9x
852 cbc_crypt NEW: Secure RPC
853 ccos NEW: ISO C 9x
854 ccosf NEW: ISO C 9x
855 ccosh NEW: ISO C 9x
856 ccoshf NEW: ISO C 9x
857 ccoshl NEW: ISO C 9x
858 ccosl NEW: ISO C 9x
859 cexp NEW: ISO C 9x
860 cexpf NEW: ISO C 9x
861 cexpl NEW: ISO C 9x
862 cimag NEW: ISO C 9x
863 cimagf NEW: ISO C 9x
864 cimagl NEW: ISO C 9x
865 clearerr_locked REMOVED
866 clntunix_create NEW: sunrpc ext
867 clog NEW: ISO C 9x
868 clog10 NEW: ISO C 9x
869 clog10f NEW: ISO C 9x
870 clog10l NEW: ISO C 9x
871 clogf NEW: ISO C 9x
872 clogl NEW: ISO C 9x
873 conj NEW: ISO C 9x
874 conjf NEW: ISO C 9x
875 conjl NEW: ISO C 9x
876 cpow NEW: ISO C 9x
877 cpowf NEW: ISO C 9x
878 cpowl NEW: ISO C 9x
879 cproj NEW: ISO C 9x
880 cprojf NEW: ISO C 9x
881 cprojl NEW: ISO C 9x
882 creal NEW: ISO C 9x
883 crealf NEW: ISO C 9x
884 creall NEW: ISO C 9x
885 creat64 NEW: LFS
886 csin NEW: ISO C 9x
887 csinf NEW: ISO C 9x
888 csinh NEW: ISO C 9x
889 csinhf NEW: ISO C 9x
890 csinhl NEW: ISO C 9x
891 csinl NEW: ISO C 9x
892 csqrt NEW: ISO C 9x
893 csqrtf NEW: ISO C 9x
894 csqrtl NEW: ISO C 9x
895 ctan NEW: ISO C 9x
896 ctanf NEW: ISO C 9x
897 ctanh NEW: ISO C 9x
898 ctanhf NEW: ISO C 9x
899 ctanhl NEW: ISO C 9x
900 ctanl NEW: ISO C 9x
901 des_setparity NEW: Secure RPC
902 ecb_crypt NEW: Secure RPC
903 endutxent NEW: Unix98
904 exp10 NEW: ISO C 9x
905 exp10f NEW: ISO C 9x
906 exp10l NEW: ISO C 9x
907 exp2 NEW: ISO C 9x
908 exp2f NEW: ISO C 9x
909 exp2l NEW: ISO C 9x
910 fattach NEW: STREAMS
911 fdetach NEW: STREAMS
912 fdim NEW: ISO C 9x
913 fdimf NEW: ISO C 9x
914 fdiml NEW: ISO C 9x
915 feclearexcept NEW: ISO C 9x
916 fegetenv NEW: ISO C 9x
917 fegetexceptflag NEW: ISO C 9x
918 fegetround NEW: ISO C 9x
919 feholdexcept NEW: ISO C 9x
920 feof_locked REMOVED
921 feraiseexcept NEW: ISO C 9x
922 ferror_locked REMOVED
923 fesetenv NEW: ISO C 9x
924 fesetexceptflag NEW: ISO C 9x
925 fesetround NEW: ISO C 9x
926 fetestexcept NEW: ISO C 9x
927 feupdateenv NEW: ISO C 9x
928 fflush_locked REMOVED
929 ffsl NEW: GNU ext.
930 ffsll NEW: GNU ext.
931 fgetpos64 NEW: LFS
932 fgets_unlocked NEW: GNU ext.
933 fileno_locked REMOVED
934 fma NEW: ISO C 9x
935 fmaf NEW: ISO C 9x
936 fmal NEW: ISO C 9x
937 fmax NEW: ISO C 9x
938 fmaxf NEW: ISO C 9x
939 fmaxl NEW: ISO C 9x
940 fmin NEW: ISO C 9x
941 fminf NEW: ISO C 9x
942 fminl NEW: ISO C 9x
943 fmtmsg NEW: Unix98
944 fopen64 NEW: LFS
945 fputc_locked REMOVED
946 fputs_unlocked NEW: GNU ext.
947 fread_unlocked NEW: GNU ext.
948 freopen64 NEW: LFS
949 fseeko NEW: Unix98
950 fsetpos64 NEW: LFS
951 fstatfs64 NEW: LFS
952 fstatvfs NEW: Unix98
953 fstatvfs64 NEW: LFS
954 ftello NEW: Unix98
955 ftello64 NEW: LFS
956 ftruncate64 NEW: LFS
957 ftw64 NEW: LFS
958 fwrite_unlocked NEW: GNU ext.
959 gai_strerror NEW: IPv6
960 gamma_r REMOVED
961 gammaf_r REMOVED
962 gammal_r REMOVED
963 getchar_locked REMOVED
964 getdate NEW: Unix98
965 getdate_err NEW: Unix98
966 getdate_r NEW: GNU ext.
967 getmsg NEW: STREAMS
968 getnameinfo NEW: IPv6
969 getnetname NEW: Secure RPC
970 getpmsg NEW: STREAMS
971 getpt NEW: Unix98 PTY
972 getrlimit64 NEW: LFS
973 getutxent NEW: Unix98
974 getutxid NEW: Unix98
975 getutxline NEW: Unix98
976 glob64 NEW: GNU ext.
977 globfree64 NEW: GNU ext.
978 gnu_get_libc_release NEW: GNU ext.
979 gnu_get_libc_version NEW: GNU ext.
980 grantpt NEW: Unix98 PTY
981 host2netname NEW: Secure RPC
982 iconv NEW: iconv
983 iconv_close NEW: iconv
984 iconv_open NEW: iconv
985 if_freenameindex NEW: IPv6
986 if_indextoname NEW: IPv6
987 if_nameindex NEW: IPv6
988 if_nametoindex NEW: IPv6
989 in6addr_any NEW: IPv6
990 in6addr_loopback NEW: IPv6
991 inet6_isipv4mapped NEW: IPv6
992 isastream NEW: STREAMS
993 iswblank NEW: GNU ext.
994 key_decryptsession NEW: Secure RPC
995 key_decryptsession_pk NEW: Secure RPC
996 key_encryptsession NEW: Secure RPC
997 key_encryptsession_pk NEW: Secure RPC
998 key_gendes NEW: Secure RPC
999 key_get_conv NEW: Secure RPC
1000 key_secretkey_is_set NEW: Secure RPC
1001 key_setnet NEW: Secure RPC
1002 key_setsecret NEW: Secure RPC
1003 llrint NEW: ISO C 9x
1004 llrintf NEW: ISO C 9x
1005 llrintl NEW: ISO C 9x
1006 llround NEW: ISO C 9x
1007 llroundf NEW: ISO C 9x
1008 llroundl NEW: ISO C 9x
1009 log2 NEW: ISO C 9x
1010 log2f NEW: ISO C 9x
1011 log2l NEW: ISO C 9x
1012 lrint NEW: ISO C 9x
1013 lrintf NEW: ISO C 9x
1014 lrintl NEW: ISO C 9x
1015 lround NEW: ISO C 9x
1016 lroundf NEW: ISO C 9x
1017 lroundl NEW: ISO C 9x
1018 lseek64 NEW: LFS
1019 makecontext NEW: Unix98
1020 mempcpy NEW: GNU ext.
1021 mmap64 NEW: LFS
1022 moncontrol REMOVED
1023 modify_ldt NEW: kernel
1024 nan NEW: ISO C 9x
1025 nanf NEW: ISO C 9x
1026 nanl NEW: ISO C 9x
1027 nearbyint NEW: ISO C 9x
1028 nearbyintf NEW: ISO C 9x
1029 nearbyintl NEW: ISO C 9x
1030 netname2host NEW: Secure RPC
1031 netname2user NEW: Secure RPC
1032 nexttoward NEW: ISO C 9x
1033 nexttowardf NEW: ISO C 9x
1034 nexttowardl NEW: ISO C 9x
1035 nftw NEW: Unix98
1036 nftw64 NEW: LFS
1037 open64 NEW: LFS
1038 passwd2des NEW: Secure RPC
1039 pow10 NEW: GNU ext.
1040 pow10f NEW: GNU ext.
1041 pow10l NEW: GNU ext.
1042 pread NEW: Unix98
1043 pread64 NEW: LFS
1044 printf_size NEW: GNU ext.
1045 printf_size_info NEW: GNU ext.
1046 profil_counter REMOVED
1047 pthread_mutexattr_getkind_np REPLACED
1048 pthread_mutexattr_setkind_np REPLACED
1049 ptsname NEW: Unix98 PTY
1050 ptsname_r NEW: Unix98 PTY
1051 putc_locked REMOVED
1052 putchar_locked REMOVED
1053 putgrent NEW: GNU ext.
1054 putmsg NEW: STREAMS
1055 putpmsg NEW: STREAMS
1056 pututxline NEW: Unix98
1057 pwrite NEW: Unix98
1058 pwrite64 NEW: LFS
1059 readdir64 NEW: LFS
1060 readdir64_r NEW: LFS
1061 remquo NEW: ISO C 9x
1062 remquof NEW: ISO C 9x
1063 remquol NEW: ISO C 9x
1064 round NEW: ISO C 9x
1065 roundf NEW: ISO C 9x
1066 roundl NEW: ISO C 9x
1067 rtime NEW: GNU ext.
1068 scalbln NEW: ISO C 9x
1069 scalblnf NEW: ISO C 9x
1070 scalblnl NEW: ISO C 9x
1071 scandir64 NEW: LFS
1072 sendfile NEW: kernel
1073 setcontext NEW: Unix98
1074 setrlimit64 NEW: LFS
1075 setutxent NEW: Unix98
1076 sighold NEW: Unix98
1077 sigignore NEW: Unix98
1078 sigqueue NEW: POSIX.1b
1079 sigrelse NEW: Unix98
1080 sigset NEW: POSIX.1b
1081 sigtimedwait NEW: POSIX.1b
1082 sigwaitinfo NEW: POSIX.1b
1083 sincos NEW: GNU ext.
1084 sincosf NEW: GNU ext.
1085 sincosl NEW: GNU ext.
1086 statfs64 NEW: LFS
1087 statvfs NEW: Unix98
1088 statvfs64 NEW: LFS
1089 strcasestr NEW: GNU ext.
1090 strtoimax NEW: ISO C 9x
1091 strtoumax NEW: ISO C 9x
1092 strverscmp NEW: GNU ext.
1093 svcauthdes_stats NEW: Secure RPC
1094 svcunix_create NEW: sunrpc etx
1095 svcunixfd_create NEW: sunrpc ext
1096 swapcontext NEW: Unix98
1097 tcgetsid NEW: Unix98 PTY
1098 tdestroy NEW: GNU ext.
1099 tgamma NEW: ISO C 9x
1100 tgammaf NEW: ISO C 9x
1101 tgammal NEW: ISO C 9x
1102 tmpfile64 NEW: LFS
1103 trunc NEW: ISO C 9x
1104 truncate64 NEW: LFS
1105 truncf NEW: ISO C 9x
1106 truncl NEW: ISO C 9x
1107 umount2 NEW: kernel
1108 unlockpt NEW: Unix98 PTY
1109 updwtmpx NEW: Unix98
1110 user2netname NEW: Secure RPC
1111 utmpxname NEW: Unix98
1112 versionsort NEW: GNU ext.
1113 versionsort64 NEW: GNU ext.
1114 waitid NEW: Unix98
1115 wcscasecmp NEW: GNU ext.
1116 wcsncasecmp NEW: GNU ext.
1117 wcsnlen NEW: GNU ext.
1118 wcstoimax NEW: ISO C 9x
1119 wcstoll NEW: ISO C 9x
1120 wcstoull NEW: ISO C 9x
1121 wcstoumax NEW: ISO C 9x
1122 wcswcs NEW: Unix98
1123 wordexp NEW: POSIX.2
1124 wordfree NEW: POSIX.2
1125 write_profiling REMOVED
1126 xdecrypt NEW: Secure RPC
1127 xdr_authdes_cred NEW: Secure RPC
1128 xdr_authdes_verf NEW: Secure RPC
1129 xdr_cryptkeyarg NEW: Secure RPC
1130 xdr_cryptkeyarg2 NEW: Secure RPC
1131 xdr_cryptkeyres NEW: Secure RPC
1132 xdr_getcredres NEW: Secure RPC
1133 xdr_key_netstarg NEW: Secure RPC
1134 xdr_key_netstres NEW: Secure RPC
1135 xdr_keybuf NEW: Secure RPC
1136 xdr_keystatus NEW: Secure RPC
1137 xdr_netnamestr NEW: Secure RPC
1138 xdr_sizeof NEW: Secure RPC
1139 xdr_unixcred NEW: sunrpc ext
1140 xencrypt NEW: Secure RPC
1141 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1142 \f
1143 Version 2.0.6
1145 * more bug fixes
1147 \f
1148 Version 2.0.5
1150 * more bug fixes
1152 * inet_ntoa is thread-safe
1154 * updwtmp is moved from libutil to libc
1156 * rewrite of cbrt function
1158 * update of timezone data
1159 \f
1160 Version 2.0.4
1162 * more bug fixes
1163 \f
1164 Version 2.0.3
1166 * more bug fixes
1167 \f
1168 Version 2.0.2
1170 * more bug fixes
1172 * add atoll function
1174 * fix complex problems in Berkeley DB code
1176 * fix math functions
1177 \f
1178 Version 2.0.1
1180 * fixed lots of header problems (especially Linux/GNU specific)
1182 * dynamic loader preserves all registers
1184 * Roland McGrath provided support for handling of auxiliary objects in
1185 the ELF dynamic loader.
1187 * support for parallel builds is improved
1188 \f
1189 Version 2.0
1191 * GNU extensions are no longer declared by default. To enable them you
1192 must define the macro `_GNU_SOURCE' in your program or compile with
1193 `-D_GNU_SOURCE'.
1195 * The library has changed from using GNU ld symbol aliases to using weak
1196 symbols where available. The ELF object file format supports weak
1197 symbols; GNU ld also supports weak symbols in the a.out format. (There
1198 is also now support for other GNU ld extensions in ELF. Use the
1199 `--with-elf' option to configure to indicate you have ELF, and
1200 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1201 of many files which contained only symbol aliases, reducing the size of
1202 the source and the compiled library; many other files were renamed to
1203 less cryptic names previously occupied by the symbol alias files.
1204 There is a new header file <elf.h> for programs which operate on
1205 files in the ELF format.
1207 * Converted to Autoconf version 2, so `configure' has more options.
1208 Run `configure --help' to see the details.
1210 * The library can now be configured to build profiling, highly-optimized
1211 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1212 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1213 `configure' enable building these extra libraries. The shared library is
1214 built by default when using both ELF and GNU ld. When shared libraries
1215 are enabled, the new library `-ldl' is available for arbitrary run-time
1216 loading of shared objects; its interface is defined in <dlfcn.h>. The
1217 new header file <link.h> gives access to the internals of the run-time
1218 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1219 application of same name on other systems and it provides information
1220 about dynamically linked binaries.
1222 * The C library now provides the run-time support code for profiling
1223 executables compiled with `-pg'. Programs can control the profiling code
1224 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1225 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1226 the support for this file format was contributed by David Mosberger-Tang.
1228 * The math code has been replaced with a math library based on fdlibm from
1229 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1230 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1231 functions. The math functions now reside in a separate library, so
1232 programs using them will need to use `-lm' their linking commands.
1234 * John C. Bowman contributed optimized ix87 assembler inline functions.
1236 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1237 mechanism similar to that found in Solaris 2. This is now used for the
1238 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1239 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1240 file controls what services are used for each individual database. This
1241 works by loading shared libraries with names specified in `nsswitch.conf',
1242 so service modules can be changed or added at any time without even
1243 relinking any program. Currently there are the file, db, and NIS based
1244 NSS services available.
1246 * The new functions `strtoq' and `strtouq' parse integer values from
1247 strings, like `strtol' and `strtoul', but they return `long long int' and
1248 `unsigned long long int' values, respectively (64-bit quantities).
1250 * The new functions `strtof' and `strtold' parse floating-point values from
1251 strings, like `strtod', but they return `float' and `long double' values,
1252 respectively (on some machines `double' and `long double' are the same).
1254 * Ulrich Drepper has contributed new implementations of the floating-point
1255 printing and reading code used in the `printf' family of functions and
1256 `strtod', `strtof', and `strtold'. These new functions are perfectly
1257 accurate, and much faster than the old ones.
1259 * The implementation of the POSIX locale model was completely rewritten by
1260 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1261 to compile the POSIX locale definition.
1263 * The former dummy implementations of the strcoll and strxfrm function are
1264 now replaced by fully functional code contributed by Ulrich Drepper. The
1265 collation information comes from the POSIX locale definitions.
1267 * The new header <langinfo.h> defines an interface for accessing
1268 various locale-dependent data (using the locale chosen with `setlocale').
1270 * Ulrich Drepper has contributed a new suite of functions for operation on
1271 wide-character and multibyte-character strings, in <wchar.h>;
1272 and classification and case conversion of wide characters, in <wctype.h>.
1273 These new functions are conforming to the ISO C, Amendement 1 specification.
1275 * There is now a second implementation of the standard I/O library available.
1276 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1277 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1279 * You can now use positional parameter specifications in format strings
1280 for the `printf' and `scanf' families of functions. For example,
1281 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1282 ``Number 6, Mr Jones''. This is mainly useful when providing different
1283 format strings for different languages, whose grammars may dictate
1284 different orderings of the values being printed. To support this
1285 feature, the interface for `register_printf_handler' has changed; see
1286 the header file <printf.h> for details.
1288 * The `printf' and `scanf' families of functions now understand a new
1289 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1290 to group numbers as indicated by the locale; for `scanf' and friends, this
1291 says to accept as valid only a number with all the proper grouping
1292 separators in the right places. In the default "C" locale, numbers are
1293 not grouped; but locales for specific countries will define the usual
1294 conventions (i.e. separate thousands with `,' in the US locale).
1296 * The pgrp functions have been regularized, slightly incompatibly but much
1297 less confusingly. The core functions are now `getpgid' and `setpgid',
1298 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1299 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1300 provided for compatibility. There is no longer an incompatible `getpgrp'
1301 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1303 * The new header file <fts.h> and suite of functions simplify programs that
1304 operate on directory trees. This code comes from 4.4 BSD.
1306 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1307 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1308 NSS scheme used in glibc.
1310 * There is a new malloc debugging hook `__memalign_hook'.
1312 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1313 `unsigned int' in <sys/types.h>. These are for compatibility only and
1314 their use is discouraged.
1316 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1317 done differently, so that it works even without GNU ld.
1319 * New function `euidaccess' checks allowed access to a file like `access',
1320 but using the effective IDs instead of the real IDs.
1322 * The time zone data files have been updated for the latest and greatest
1323 local time conventions of the countries of the world.
1325 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1326 see <dirent.h>.
1328 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1329 for formatting floating-point numbers. They are provided only for
1330 compatibility; new programs should use `sprintf' instead. There are
1331 also equivalent function for the `long double' floating-point type and
1332 all functions also exist in a reentrant form.
1334 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1335 functions for maintaining the login-record files (primarily of use to
1336 system programs such as `login'), and convenient functions for
1337 allocating and initializing a pseudo-terminal (pty) device.
1339 * Ulrich Drepper has contributed new support for System V style
1340 shared memory and IPC on systems that support it.
1342 * Ulrich Drepper has contributed several miscellaneous new functions found
1343 in System V: The `hsearch' family of functions provide an effective
1344 implementation of hash tables; `a64l' and `l64a' provide a very simple
1345 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1346 number generator.
1348 * Ulrich Drepper has contributed new reentrant counterparts for the
1349 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1351 * Ulrich Drepper has contributed new, highly-optimized versions of several
1352 string functions for the i486/Pentium family of processors.
1354 * Ulrich Drepper has updated the Linux-specific code, based largely
1355 on work done in Hongjiu Lu's version of GNU libc for Linux.
1356 The GNU library now supports Linux versions 2.0.10 and later,
1357 using the ELF object file format (i[3456]86-*-linux).
1359 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1361 * David Mosberger-Tang and Richard Henderson have ported the C library
1362 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1363 dynamic linking support for ELF/Alpha.
1365 * Richard Henderson contributed several Alpha optimized assembler function
1366 for arithmetic and string handling.
1368 * Ulrich Drepper has contributed a new set of message catalog functions to
1369 support multiple languages using the <libintl.h> interface, for use with
1370 his new package GNU gettext. Translation volunteers have contributed
1371 catalogs of the library's messages in Spanish, German, and Korean.
1373 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1374 program and the `catgets' function for reading the catalog files it
1375 creates. (The <libintl.h> interface is preferred; we include the
1376 <nl_types.h> interface using `catgets' only for source compatibility with
1377 programs already written to use it.)
1379 * New header file <values.h> gives SVID-compatible names for <limits.h>
1380 constants.
1382 * Various new macros, declarations, and small header files for compatibility
1383 with 4.4 BSD.
1385 * New function `group_member' is a convenient way to check if a process has
1386 a given effective group ID.
1388 * When using GCC 2.7 and later, the socket functions are now declared in a
1389 special way so that passing an argument of type `struct sockaddr_in *',
1390 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1391 `struct sockaddr *' type, does not generate a type-clash warning.
1393 * New function `error' declared in header file <error.h> is a convenient
1394 function for printing error messages and optionally exiting; this is the
1395 canonical function used in GNU programs. The new functions `err', `warn',
1396 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1397 doing the same thing.
1399 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1400 POSIX.2 `glob' function to do ~ and {...} expansion.
1402 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1403 `clearenv' which is used in POSIX.9 is also available.
1405 * New function `getsid' returns session ID number on systems that support it.
1407 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1408 files <db.h> and <mpool.h> provide a rich set of functions for several
1409 types of simple databases stored in memory and in files, and <ndbm.h> is
1410 an old `ndbm'-compatible interface using the `db' functions. Link with
1411 `-ldb' to get these functions.
1413 * New macro `strdupa' copies a string like `strdup', but uses local stack
1414 space from `alloca' instead of dynamic heap space from `malloc'.
1416 * New function `strnlen' is like `strlen' but searches only a given maximum
1417 number of characters for the null terminator. `stpncpy', `strndup' and
1418 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1419 function.
1421 * New function `statfs' in header <sys/statfs.h>.
1423 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1424 provide convenient functions for operating on blocks of null-terminated
1425 strings.
1427 * A new suite of functions in <utmp.h> handle all the details of reading
1428 and writing the utmp file.
1430 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1431 Thorsten Kukuk.
1433 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1434 completely POSIX compliant and also implemented the extended functionality
1435 to handle alternate digit representation and alternate era date formats.
1437 * Ulrich Drepper provided an implementation of the `strptime' function
1438 defined in XPG4.2 which transforms a string into a `struct tm' value.
1440 * Paul Eggert provided the tzselect shell script as part of the timezone
1441 code. The shell script makes it easy to select the correct timezone
1442 specification.
1444 * The implementation of the malloc family of functions is completely replaced
1445 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1446 The implementation uses the mmap function (if available) and it is
1447 optimized for the use in multi threaded programs.
1449 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1450 functions. This new functionality is usable by specifying a special
1451 salt string and it is compatible with implementation on *BSD systems.
1453 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1454 `getsubopt' to handle second level command line options, `bsd_signal'
1455 to access BSD style `signal' functionality, the obsolete `regexp' style
1456 expression matcher.
1458 * the `lchown' function is available on system which support this
1459 functionality.
1461 * The implementation of the shadow password handling function was contributed
1462 by Ulrich Drepper.
1464 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1466 * POSIX.1g support was added. The <sys/select.h> header is available,
1467 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1468 implementation of `getaddrinfo'.
1469 \f
1470 Version 1.09
1472 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1474 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1475 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1477 * The new function `daemon' from 4.4 BSD is useful for server programs that
1478 want to put themselves in the background.
1480 * Joel Sherrill has contributed support for several standalone boards that
1481 run without an operating system.
1483 * `printf', `scanf' and friends now accept a `q' type modifier for long
1484 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1486 * All of the code taken from BSD (notably most of the math and networking
1487 routines) has been updated from the BSD 4.4-Lite release.
1489 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1491 * The new functions `getdomainname' and `setdomainname' fetch or change the
1492 YP/NIS domain name. These are system calls which exist on systems which
1493 have YP (aka NIS).
1495 * The time zone data files have been updated for the latest international
1496 conventions.
1498 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1499 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1500 \f
1501 Version 1.08
1503 * The C library now includes support for Sun RPC, from Sun's free
1504 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1505 are included. (There is still no support for YP.)
1507 * Tom Quinn has contributed a port of the C library to SGI machines running
1508 Irix 4 (mips-sgi-irix4).
1510 * The new `lockf' function is a simplified interface to the locking
1511 facilities of `fcntl', included for compatibility.
1513 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1515 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1517 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1518 compatibility.
1520 * The error message printed by `assert' for a failed assertion now includes
1521 the name of the program (if using GNU ld) and the name of the calling
1522 function (with versions of GCC that support this).
1524 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1526 * The library now includes the <sys/mman.h> header file and memory
1527 management functions `mmap', `munmap', `mprotect', `msync', and
1528 `madvise', on systems that support those facilities.
1530 * The interface for `mcheck' has changed slightly: the function called to
1531 abort the program when an allocation inconsistency is detected now takes
1532 an argument that indicates the type of failure. The new function
1533 `mprobe' lets you request a consistency check for a particular block at
1534 any time (checks are normally done only when you call `free' or `realloc'
1535 on a block).
1537 * It is now possible to easily cross-compile the C library, building on one
1538 system a library to run on another machine and/or operating system. All
1539 you need to do is set the variable `HOST_CC' in `configparms' to the
1540 native compiler for programs to run on the machine you are building on (a
1541 few generator programs are used on Unix systems); set `CC' to the
1542 cross-compiler.
1544 * The new function `fexecve' (only implemented on the GNU system) executes
1545 a program file given a file descriptor already open on the file.
1546 \f
1547 Version 1.07
1549 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1550 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1552 * You can set the variable `libprefix' in `configparms' to specify a prefix
1553 to be prepended to installed library files; this makes it easy to install
1554 the GNU C library to be linked as `-lgnuc' or whatever.
1556 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1557 copies a limited number of characters from a string, and returns the
1558 address of the last character written.
1560 * You no longer need to check for whether the installed `stddef.h' is
1561 compatible with the GNU C library. configure now checks for you.
1563 * You can now define a per-stream `fileno' function to convert the
1564 stream's cookie into an integral file descriptor.
1566 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1567 allocates zero bytes of storage, and returns a unique pointer which
1568 you can pass to `realloc' or `free'. The behavior is undefined if
1569 you dereference this pointer.
1571 * The C library now runs on Sony NEWS m68k machines running either
1572 NewsOS 3 or NewsOS 4.
1574 * The new `syscall' function is a system-dependent primitive function
1575 for invoking system calls. It has the canonical behavior on Unix
1576 systems, including unreliable return values for some calls (such as
1577 `pipe', `fork' and `getppid').
1579 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1580 to `EAGAIN', which is the preferred name. On systems whose kernels
1581 use two distinct codes, the C library now translates EWOULDBLOCK to
1582 EAGAIN in every system call function.
1583 \f
1584 Version 1.06
1586 * The GNU C Library Reference Manual is now distributed with the library.
1587 `make dvi' will produce a DVI file of the printed manual.
1588 `make info' will produce Info files that you can read on line using C-h i
1589 in Emacs or the `info' program.
1590 Please send comments on the manual to bug-glibc-manual@gnu.org.
1592 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1594 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1596 * Jason Merrill has contributed a port to the Sequent Symmetry running
1597 Dynix version 3 (i386-sequent-dynix).
1599 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1600 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1602 * New function `memory_warnings' lets you arrange to get warnings when
1603 malloc is running out of memory to allocate, like Emacs gives you.
1605 * The C library now contains the relocating allocator used in Emacs 19 for
1606 its editing buffers. This allocator (ralloc) minimizes allocation
1607 overhead and fragmentation by moving allocated regions around whenever it
1608 needs to. You always refer to a ralloc'd region with a "handle" (a
1609 pointer to a pointer--an object of type `void **').
1611 * There is a new `printf' format: `%m' gives you the string corresponding
1612 to the error code in `errno'.
1614 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1615 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1616 pass, the `a' modifier says to fill in a `char **' you pass with a
1617 malloc'd string.
1619 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1620 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1621 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1623 * `mkstemp' is a traditional Unix function to atomically create and open a
1624 uniquely-named temporary file.
1625 \f
1626 Version 1.05
1628 * The standard location for the file that says what the local timezone is
1629 has changed again. It is now `/usr/local/etc/localtime' (or more
1630 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1632 * The distribution no longer contains any files with names longer than 14
1633 characters.
1635 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1636 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1638 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1639 \f
1640 Version 1.04
1642 * The configuration process has changed quite a bit. The `configure'
1643 script is now used just like the configuration scripts for other GNU
1644 packages. The `sysdeps' directory hierarchy is much rearranged.
1645 The file `INSTALL' explains the new scheme in detail.
1647 * The header files no longer need to be processed into ANSI C and
1648 traditional C versions. There is just one set of files to install, and
1649 it will work with ANSI or old C compilers (including `gcc -traditional').
1651 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1652 MIPS DECStation running Ultrix 4.
1654 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1655 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1656 made itself into a shared library.
1658 * Yet further improved support for the i386, running 4.3 BSD-like systems
1659 (such as Mach 3 with the Unix single-server), or System V.
1661 * New function `strncasecmp' to do case-insensitive string comparison
1662 with limited length.
1664 * New function `strsep' is a reentrant alternative to `strtok'.
1666 * New functions `scandir' and `alphasort' for searching directories.
1668 * New function `setenv' is a better interface to `putenv'.
1670 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1671 function for traversing a directory tree.
1673 * The GNU obstack package is now also part of the C library.
1674 The new function `open_obstack_stream' creates a stdio stream that
1675 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1676 formatted output directly to an obstack.
1678 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1679 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1681 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1683 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1684 things to your strings.
1686 * There are some new test programs: test-fseek, testmb, and testrand.
1688 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1689 These ports are not finished, but are a good starting place for really
1690 supporting those systems.
1692 * `/etc/localtime' is now the standard location for the file that says what
1693 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1694 This follows the general principle that `/etc' is the place for all local
1695 configuration files.
1697 * The C library header files now use `extern "C"' when used by the C++
1698 compiler, so the C library should now work with C++ code.
1700 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1701 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
1702 in <strings.h>.)
1704 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1705 function which uses the `merge sort' algorithm, and is said to be
1706 significantly faster than the old GNU `qsort' function. Merge sort is
1707 now the standard `qsort' function. The new algorithm can require a lot
1708 of temporary storage; so, the old sorting function is called when the
1709 required storage is not available.
1711 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1712 provides the Unix `crypt' function, plus some other entry points.
1714 * The code and header files taken from 4.4 BSD have been updated with the
1715 latest files released from Berkeley.
1716 \f
1717 ----------------------------------------------------------------------
1718 Copyright information:
1720 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1721 Free Software Foundation, Inc.
1723 Permission is granted to anyone to make or distribute verbatim copies
1724 of this document as received, in any medium, provided that the
1725 copyright notice and this permission notice are preserved,
1726 thus giving the recipient permission to redistribute in turn.
1728 Permission is granted to distribute modified versions
1729 of this document, or of portions of it,
1730 under the above conditions, provided also that they
1731 carry prominent notices stating who last changed them.
1732 \f
1733 Local variables:
1734 version-control: never
1735 End: