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1 GNU C Library NEWS -- history of user-visible changes. 2008-11-17
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 2.10
10 \f
11 Version 2.9
13 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
14 up at the same time. Implemented by Ulrich Drepper.
16 * TLS descriptors for LD and GD on x86 and x86-64.
17 Implemented by Alexandre Oliva.
19 * getaddrinfo now handles DCCP and UDPlite.
20 Implemented by Ulrich Drepper.
22 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
23 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
24 Implemented by Ulrich Drepper.
26 * New implementation of memmem, strstr, and strcasestr which is O(n).
27 Implemented by Eric Blake.
29 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
31 * Implement "e" option for popen to open file descriptor with the
32 close-on-exec flag set. Implemented by Ulrich Drepper.
34 * Implement "b" mode for fmemopen. In this mode writes writes don't
35 implicitly add a NUL byte and seeks from the end of the buffer really
36 use the buffer end, not the string length as the basis.
37 Implemented by Ulrich Drepper.
39 * Many functions, exported and internal, now atomically set the close-on-exec
40 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
42 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
43 Sinhala)
44 Implemented by Pravin Satpute.
46 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
47 \f
48 Version 2.8
50 * New locales: bo_CN, bo_IN, shs_CA.
52 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
54 * Sorting rules for some Indian languages (Devanagari and Gujarati).
55 Implemented by Pravin Satpute.
57 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
59 * nscd caches now all timeouts for DNS entries
60 Implemented by Ulrich Drepper.
62 * nscd is more efficient and wakes up less often.
63 Implemented by Ulrich Drepper.
65 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
66 vdprintf, and obstack_vprintf.
67 Implemented by Jakub Jelinek.
69 * Faster memset for x86-64.
70 Implemented by Harsha Jagasia and H.J. Lu.
72 * Faster memcpy on x86.
73 Implemented by Ulrich Drepper.
75 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
76 Implemented by Ulrich Drepper.
78 * Faster sqrt and sqrtf implemention for some PPC variants.
79 Implemented by Stephen Munroe.
80 \f
81 Version 2.7
83 * More checking functions: fread, fread_unlocked, open*, mq_open.
84 Implemented by Jakub Jelinek and Ulrich Drepper.
86 * Extend fortification to C++. Implemented by Jakub Jelinek.
88 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
89 by not recognizing 'a' as a modifier when those specs are requested.
90 Implemented by Jakub Jelinek.
92 * PPC optimizations to math and string functions.
93 Implemented by Steven Munroe.
95 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
96 options to be passed. Implemented by Ulrich Drepper.
98 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
100 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
101 Implemented by Ulrich Drepper.
103 * Handle private futexes in the NPTL implementation.
104 Implemented by Jakub Jelinek and Ulrich Drepper.
106 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
107 Implemented by Roland McGrath and Ulrich Drepper.
109 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
111 * SHA-256 and SHA-512 based password encryption.
112 Implemented by Ulrich Drepper.
114 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
115 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
116 yo_NG.
118 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
119 Implemented by Ulrich Drepper.
120 \f
121 Version 2.6
123 * New Linux interfaces: epoll_pwait, sched_getcpu.
125 * New generic interfaces: strerror_l.
127 * nscd can now cache the services database. Implemented by Ulrich Drepper.
129 \f
130 Version 2.5
132 * For Linux, the sorting of addresses returned by getaddrinfo now also
133 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
134 Implemented by Ulrich Drepper.
136 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
137 Implemented by Ulrich Drepper.
139 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
141 * New iconv module for MIK. Contributed by Alexander Shopov.
143 * For sites with broken group and/or passwd database, the auto-propagate
144 option of nscd can prevent creating ID lookup entries from the results
145 of a name lookup and vice versa. This usually is no problem but some
146 site might have problems with the default behavior.
147 Implemented by Ulrich Drepper.
149 * Iterating over entire database in NIS can be slow. With the
150 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
151 to trade time for memory. The entire database will be read at once.
152 Implemented by Ulrich Drepper.
154 * The interfaces introduced in RFC 3542 have been implemented by
155 Ulrich Drepper.
157 * Support for the new ELF hash table format was added by Ulrich Drepper.
159 * Support for priority inheritance mutexes added by Jakub Jelinek and
160 Ulrich Drepper.
162 * Support for priority protected mutexes added by Jakub Jelinek.
164 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
165 or_IN, csb_PL, fy_NL, sr_ME.
166 \f
167 Version 2.4
169 * More overflow detection functions.
171 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
172 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
174 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
175 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
176 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
177 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
178 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
179 by Masahide Washizawa.
181 * It is now possible to install audit libraries for the dynamic linker using
182 LD_AUDIT. Implemented by Ulrich Drepper.
184 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
185 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
186 For a libc and libpthread that works well on Linux 2.4 kernels, we
187 recommend using the stable 2.3 branch.
189 * The new function open_wmemstream acts like open_memstream,
190 but uses a wchar_t wide character buffer.
192 * The new function ppoll is an improved version of poll, similar to pselect.
194 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
195 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
196 renameat, unlinkat, linkat, symlinkat, readlinkat.
198 * New Linux kernel system calls: unshare,
199 inotify_init, inotify_add_watch, inotify_rm_watch.
201 * The euidaccess function is now also known by the alias eaccess,
202 for compatibility with some other systems.
204 * Timezone data updated to 2006b version.
205 \f
206 Version 2.3.6
208 * The following bugs are resolved with this release:
210 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
211 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
212 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
213 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
214 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
215 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
217 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
219 * As of this release, GCC 4 can be used to compile the C Library.
221 * Timezone data updated to 2005m version.
222 \f
223 Version 2.3.5
225 * The following bugs are resolved with this release:
227 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
228 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
229 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
230 777, 787, 821, 822, 823, 825
232 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
233 \f
234 Version 2.3.4
236 * Support for RFC 3678. Real implementations exist only for Linux so far.
237 Implemented by Ulrich Drepper.
239 * nscd can now cache entries persistently. Expiring entries are reloaded.
240 For speedups the cache can be shared in memory with client processes.
241 Implemented by Ulrich Drepper.
243 * nscd can now perform SELinux checks.
244 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
246 * getaddrinfo queries are now cached. Canonical name lookup is performed
247 efficiently.
248 Implemented by Ulrich Drepper.
250 * The nothrow function attribute is used when headers are used by gcc when
251 compiling C code. This can avoid significant amounts of exception
252 handling data.
254 * The malloc functions perform more error checking and are stricter when
255 it comes to reacting on errors. The default action is to terminate
256 the process after showing an error message. Implemented by Ulrich Drepper.
258 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
259 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
261 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
262 namespaces using the new function dlmopen(). This feature is of course,
263 like most other dynamic loading functionality, not available in statically
264 linked applications. Implemented by Ulrich Drepper.
266 * Low-overhead boundary checking variants of string and some stdio functions
267 were added. These are to be used in conjunction with a gcc patch by
268 Jakub Jelinek which adds calls to these functions if possible.
269 Implemented by Jakub Jelinek and Ulrich Drepper.
271 * Old code for several operating systems and machine architectures that
272 have not been in working condition in a long time have been removed from
273 the main source tree maintained by the GNU C Library's maintainers.
274 These files are now reside in the separate `ports' source module
275 that is usable as an add-on when building the library.
276 \f
277 Version 2.3.3
279 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
280 interrogate the dynamic linker, compatible with the Solaris interface.
282 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
283 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
285 * getifaddrs now uses the netlink interface on Linux to get its information.
286 Implemented by Thorsten Kukuk.
288 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
289 Implemented by Ulrich Drepper.
291 * support for non-executable stacks on x86 has been added. Changes mostly
292 by Roland McGrath.
294 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
295 and Ulrich Drepper.
297 * getaddrinfo now performs destination address selection according to
298 RFC 3484.
299 \f
300 Version 2.3.2
302 * Thread-safe interfaces for many functions that access locale data
303 were added in version 2.3, but these features were omitted from NEWS.
304 Many functions have variants with an `_l' suffix that take a `locale_t'
305 object as a parameter rather than consulting the current locale.
306 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
307 create and maintain `locale_t' objects. Additionally, the new function
308 `uselocale' sets "the current locale" (as used by functions not so
309 parameterized) set for an individual thread. These features were added
310 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
312 * The functions getresuid, getresgid, setresuid, and setresgid, which
313 have long been available on Linux, are now declared in <unistd.h>
314 and are now also available on the Hurd.
316 * ELF thread-local storage support (TLS) now works on x86-64.
318 * The new dynamic string token $LIB is expanded in shared library names.
319 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
321 * Aldy Hernandez contributed complete software floating point support for
322 PowerPC machines with no FPU.
324 * fexecve is implemented on Linux.
326 * The `btowc' function should work at least twice as fast due to
327 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
329 * With approriate thread add-ons cancelable functions are now implemented
330 in libc.so as well. No need to call the function in libpthread. This
331 change allowed to finally disable the incorrect and expensive handling
332 of weak definition in ld.so.
334 * Yet more PLT entries in libc.so have been removed. We finally arrived
335 at the bare minimum. Startup times improved appropriately.
337 * Support for the new Linux/x86 system call interface was added. The
338 AT_SYSINFO auxiliary vector entry is recognized and handled.
339 \f
340 Version 2.3
342 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
343 charsets.
345 * iconv (the program and the interface) now accepts empty names (excluding
346 options like //TRANSLIT) to mean "use charset of current locale".
348 * localedef can now transliterate characters in strings which are not in
349 the provided charmap. The information from the input locale is used.
351 * Prelinking support was added for ELF targets. This requires additional
352 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
354 * Read-only stdio streams now use mmap to speed up operation by eliminating
355 copying and buffer underflows. To use add 'm' to the mode string of
356 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
358 * The malloc functions were completely rewritten by Wolfram Gloger based
359 on Doug Lea's malloc-2.7.0.c.
361 * Isamu Hasegawa contributed a completely new and POSIX-conformant
362 implementation of regex.
364 * Bruno Haible upgraded the iconv and locale implementation to support
365 Unicode 3.2.
367 * Contents of the LC_* and LANG environment variables in the CEN style are
368 not recognized anymore. It never was used. Change by Ulrich Drepper.
370 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
371 thread-local storage (TLS) ABI on some platforms.
372 Changes by Ulrich Drepper. SH support by Kaz Kojima.
374 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
375 EUC-JISX0213, and TSCII.
377 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
378 BSD-compatible interface for getting all network interface addresses.
379 Implementation for IPv4 by Roland McGrath.
381 * Loading of locale data is faster due to the introduction of a locale
382 archive. Implemented by Roland McGrath and Ulrich Drepper.
384 * Startup times are significantly reduced by not using exported functions
385 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
386 and Ulrich Drepper.
388 * Steven Munroe contributed a port to PowerPC64/Linux.
389 \f
390 Version 2.2.6
392 * The Hurd now uses the GNU libio implementation of stdio rather than the
393 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
395 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
396 with the same behavior as the Linux system call of the same name.
397 \f
398 Version 2.2.5
400 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
401 128-bit long double format.
403 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
404 IBM1161, and IBM1162 charsets.
406 * Andreas Jaeger contributed a port to x86-64/Linux.
408 * Peter Bruin contributed a port to PowerPC/Hurd.
410 * libc functions using I/O streams now can handle wide-oriented streams
411 as well.
413 * optimizations in the dynamic linker. Binaries created by recent binutils
414 versions start up quicker due to reduced time spent on relocations.
416 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
417 \f
418 Version 2.2.4
420 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
421 asinh, atanh, j0 for the 128-bit long double format.
423 * Bruno Haible updated all the code handling Unicode in some form to
424 support Unicode 3.1.
426 * Speed of regex for single-byte locales is back to previous levels.
427 Patch by Isamu Hasegawa.
429 * Alpha, SPARC, and IA-64 now also using floating stacks.
431 * Startup time of internationalized applications greatly improved through
432 iconv cache. Use iconvconfig to generate the cache file.
433 Contributed by Ulrich Drepper.
435 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
436 severe performance problems. Patch by David Mosberger.
438 * The Hurd port got a lot more functionality like AIO, various stdio
439 extensions, etc. Mainly done by Roland McGrath.
441 * mtrace can now lookup symbols in shared libraries.
442 \f
443 Version 2.2.3
445 * Intel's IA-64 math library is largely integrated. It provides fast and
446 accurate implementatations for most basic and standard math functions
447 in float, double, and long double format.
449 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
450 and asin for the 96-bit long double format and asin, log, tan for the
451 128-bit long double format.
453 * The beginning of a last-bit accurate math library by IBM Haifa were added.
454 The basic double functions exist today. Contributed by Abraham Ziv
455 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
456 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
458 * An asynchronous name lookup library was added. The interface is designed
459 after POSIX AIO. The proposal was circulated beforehand to get comments.
460 No negative ones came in. Implemented by Ulrich Drepper.
462 * Port to S390/64bit contributed by Martin Schwidefsky
463 <schwidefsky@de.ibm.com>.
465 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
466 of functions for Linux/IA-64.
468 * The RPC code is now thread safe. Threads can now use the same service
469 of different services at the same time. Patch by Eric Norum
470 <eric.norum@usask.ca> with some help by Ulrich Drepper.
472 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
473 family of functions for Linux/S390.
475 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
476 of functions for Linux/x86.
478 * Port to Linux/CRIS contributed by Axis Communications.
479 \f
480 Version 2.2.2
482 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
483 we can now check for namespace violations and missing declarations. The
484 result is that almost all headers are now Unix-compliant (as defined in
485 the upcoming XPG6). The negative side is that some programs might need
486 corrections, too, if they depend on the incorrect form of the headers in
487 previous versions which defined too many symbols and included too many
488 other headers.
490 * regex now handles multibyte character sets correctly.
491 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
493 * iconv (the program) does now conform to the upcoming XPG6 and handles
494 charmaps. Instead of the charset names the path of charmaps can be
495 provided and the conversion happens based on this data.
496 Contributed by Ulrich Drepper.
498 * The locale program now provides detailed information about the installed
499 locales. While
501 locale -a
503 only lists the names of the supported locales
505 locale -a --verbose
507 provides details such as country, language, and codeset name.
508 Contributed by Ulrich Drepper.
509 \f
510 Version 2.2.1
512 * The gencat program now parses the input file according to the charset
513 selected by the LC_CTYPE category. This is important for stateful
514 character sets. To make generating catalogs easier there is a way
515 to overwrite the charset selected by the locale: before the first
516 message or $ quote line the catalog can contain a line like
518 $ codeset=ISO-8859-2
520 to select the charset (ISO-8859-2 in this case).
522 Implemented by Shinya Hanataka and Ulrich Drepper.
524 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
525 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
526 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
528 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
529 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
531 * The LANGUAGE environment variable is now ignored unless the locale is
532 changed from the default "C" locale.
534 * The usual bug fixes.
535 \f
536 Version 2.2
538 * Greg McGary added runtime support for bounds checking using gcc's
539 new -fbounded-pointers option. ix86 target is complete. PowerPC
540 is in progress.
542 * Thorsten Kukuk added secure mode support to nscd.
544 * The Berkeley db libraries have been removed.
546 Related, the nss_db module is now in a separate package since it
547 obviously requires a database library being available.
549 * Wide character I/O streams implemented by Ulrich Drepper.
551 * Functions from the extended socket API added by Ulrich Drepper.
553 * Functions feenableexcept and fedisableexcept to control the
554 behaviour of individual exceptions have been added by Andreas Jaeger.
556 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
558 * The resolver code has been updated from bind 8.2.3-T5B which supports
559 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
560 and Mark Kettenis.
562 This change could in some situations effect backward compatibility. Since
563 now `_res' is a thread-local instead of a global variable, modifying it
564 in one thread does not have any effect in other threads.
566 The resolver library was also extended to allow IPv6 as the transport
567 protocol for the requests. This work was done by Stig Venaas.
569 * Compatibility code for K&R C compilers has been removed from the
570 header files. A ISO C compiler is needed to use the library
571 (conforming to either C89 or C99 standard).
573 * Complete rewrite of the localedef program to support multibyte character
574 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
575 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
576 Implemented by Ulrich Drepper.
578 Bruno Haible significantly improved the generation and use of the data
579 structures for the wide character tables.
581 * Plural handling in gettext implemented by Ulrich Drepper.
583 * The utmp daemon has been removed.
585 * The port to MIPS-Linux has been finished by Andreas Jaeger.
587 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
588 and Yutaka Niibe.
590 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
592 * POSIX barriers implemented by Kaz Kylheku.
594 * POSIX spawn function family implemented by Ulrich Drepper.
596 * POSIX spinlocks are now available.
598 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
600 * the configure option --enable-kernel=X.Y.Z allows to strip out
601 compatibility for kernel versions before X.Y.Z. This is currently only
602 implemented for Linux.
604 * the sockaddr_in6 structure changed. The IPv6 working group added a new
605 field sin6_scope_id. This means that all programs using IPv6 should be
606 recompiled. Don't expect binary compatibility with previous glibc
607 versions.
609 * various conversion modules for IBM character sets contributed by
610 Masahide Washizawa.
612 * IA-64 port by Jes Sorensen and HJ Lu.
614 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
615 Compiling the GNU C Library for Linux/ia64
616 ******************************************
618 Please refer to the file INSTALL in the same directory as you found
619 this file for general information about configuring and compiling
620 glibc.
622 For general inquiries about glibc under Linux/ia64 please use the
623 following mailing list linux-ia64@linuxia64.org or one of the relevant
624 glibc mailing lists.
626 Recommended Tools for Compilation
627 =================================
629 In order for glibc-2.2 to build correctly on the ia64 you need at
630 least the following versions of the GNU tools (the :
632 * The Cygnus toolchain snapshot for the ia64 as of August 4
633 including the provided set of patches. It is however recommend
634 you use the October 24 toolchain snapshot or a more recent version.
636 OR alternatively you can try the following (the Cygnus toolchain is
637 the recommended solution):
639 * GCC and binutils, GAS and GNU LD out of CVS from
640 sources.redhat.com as of August 28, 2000 or later. The CVS tree
641 may require special patches to work properly on the ia64.
643 Configuring and compiling GNU Libc for Linux/ia64
644 =================================================
646 The library requires Linux kernel version 2.4.0-test4-000728 or
647 later to funtion properly. Besides that it support for debug libraries
648 is currently untested. Hence the following options
649 are required for configuring the library:
651 --disable-debug --enable-kernel=2.4.0
653 It is also important that you make sure the library picks up the
654 appropriate kernel header files, if you do not have recent enough
655 kernel headers in /usr/src/linux/include, you should use the
656 --with-headers=<path> option to specify the location.
658 As an example I personally use the following options to configure
659 the library:
661 --disable-debug
662 --disable-cvs
663 --enable-kernel=2.4.0
664 --host=ia64-linux
665 --enable-add-ons=yes
666 --prefix=/usr
667 --with-headers=/home/jes/linux/include
670 Good luck
672 Jes Sorensen <jes@linuxcare.com>,
673 November 14th, 2000
674 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
675 \f
676 Version 2.1.3
678 * bug fixes
680 \f
681 Version 2.1.2
683 * bug fixes
685 \f
686 Version 2.1.1
688 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
690 * New xdr functions are added; some rpc functions are now 64bit clean.
692 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
694 * Fixed known incompatibilities with glibc 2.0.
696 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
698 * Optimized a number of functions (especially the ELF dynamic loader).
700 * Update timezone data files.
702 * lots of charmaps corrections
704 * some new locale definitions and charmaps
706 \f
707 Version 2.1
709 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
710 conform to POSIX member type requirements. Symbol versions have been
711 adjusted as needed within the library, and for direct use by applications,
712 but there is potential for problems if third-party libraries use
713 struct timeval as part of their interface. This does not present
714 a problem for X and other "essential" system libraries.
716 * An additional locale model to support C++ Standard Library locale
717 model and probably more was implemented by Ulrich Drepper.
719 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
720 symbol level.
722 * Miles Bader provided the `argp' function family to support hierachical
723 command line argument parsing, layered on top of getopt.
725 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
727 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
728 numbers.
730 * scanf recognizes the %a and %A format for scanning floating point numbers.
732 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
733 information and interfaces for the available integer types.
735 * about 130 new math functions were added to implement the ISO C9x math
736 library.
738 * the new header <complex.h> contains definitions of the complex math
739 functions from ISO C 9X.
741 * the new header <tgmath.h> defines generic macros to use complex or
742 real valued functions.
744 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
746 * Andreas Jaeger provided a test suite for the math library.
748 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
750 * Ulrich Drepper added character set conversion functions (iconv).
752 * Optimized string functions have been added.
754 * The localedata addon is now part of glibc.
756 * An implementation of profiling shared libraries was added by Ulrich Drepper.
758 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
759 daemon for NSS (nscd).
761 Missing a better place here are some numbers on improvements. Under
762 Linux 2.1.125 un-tar-ing the kernel sources takes
764 user system wall
766 using local files 12.19s 6.88s 22.91s
768 using NIS 13.92s 8.91s 26.34s
770 using NIS & nscd 10.37s 7.34s 25.30s
772 using NIS+ 27.57s 30.37s 640.46s
774 using NIS+ & nscd 10.25s 7.83s 26.51s
776 using NIS & old nscd [1] 13.83s 8.32s 29.60s
778 Keep in mind that non-namelookup related operations dominate above times.
779 It was just a common complain that using NIS+ unpacking the kernel is
780 horribly slow.
782 [1] The old nscd implementation is not available anymore since it was
783 distributed with glibc up to version 2.0.98 and thus is now replaced.
785 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
787 * Mark Kettenis provided a Hesiod NSS module.
789 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
790 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
792 * rcmd can now handle netgroups (Dick Streefland).
794 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
795 Bambrough.
797 * Support for the IPv6 protocol has been added to the socket API, as per the
798 latest draft standards.
800 * Support for Linux 2.2 has been added.
802 * Interface changes relative to the latest 2.0.x release:
803 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
804 addseverity NEW: Unix98
805 alphasort64 NEW: LFS
806 argp_err_exit_status NEW: argp, GNU ext
807 argp_error NEW: argp, GNU ext
808 argp_failure NEW: argp, GNU ext
809 argp_help NEW: argp, GNU ext
810 argp_parse NEW: argp, GNU ext
811 argp_program_bug_address NEW: argp, GNU ext
812 argp_program_version NEW: argp, GNU ext
813 argp_program_version_hook NEW: argp, GNU ext
814 argp_state_help NEW: argp, GNU ext
815 argp_usage NEW: argp, GNU ext
816 authdes_create NEW: Secure RPC
817 authdes_getucred NEW: Secure RPC
818 authdes_pk_create NEW: Secure RPC
819 backtrace NEW: GNU ext.
820 backtrace_symbols NEW: GNU ext.
821 backtrace_symbols_fd NEW: GNU ext.
822 cacos NEW: ISO C 9x
823 cacosf NEW: ISO C 9x
824 cacosh NEW: ISO C 9x
825 cacoshf NEW: ISO C 9x
826 cacoshl NEW: ISO C 9x
827 cacosl NEW: ISO C 9x
828 capget NEW: kernel
829 capset NEW: kernel
830 carg NEW: ISO C 9x
831 cargf NEW: ISO C 9x
832 cargl NEW: ISO C 9x
833 casin NEW: ISO C 9x
834 casinf NEW: ISO C 9x
835 casinh NEW: ISO C 9x
836 casinhf NEW: ISO C 9x
837 casinhl NEW: ISO C 9x
838 casinl NEW: ISO C 9x
839 catan NEW: ISO C 9x
840 catanf NEW: ISO C 9x
841 catanh NEW: ISO C 9x
842 catanhf NEW: ISO C 9x
843 catanhl NEW: ISO C 9x
844 catanl NEW: ISO C 9x
845 cbc_crypt NEW: Secure RPC
846 ccos NEW: ISO C 9x
847 ccosf NEW: ISO C 9x
848 ccosh NEW: ISO C 9x
849 ccoshf NEW: ISO C 9x
850 ccoshl NEW: ISO C 9x
851 ccosl NEW: ISO C 9x
852 cexp NEW: ISO C 9x
853 cexpf NEW: ISO C 9x
854 cexpl NEW: ISO C 9x
855 cimag NEW: ISO C 9x
856 cimagf NEW: ISO C 9x
857 cimagl NEW: ISO C 9x
858 clearerr_locked REMOVED
859 clntunix_create NEW: sunrpc ext
860 clog NEW: ISO C 9x
861 clog10 NEW: ISO C 9x
862 clog10f NEW: ISO C 9x
863 clog10l NEW: ISO C 9x
864 clogf NEW: ISO C 9x
865 clogl NEW: ISO C 9x
866 conj NEW: ISO C 9x
867 conjf NEW: ISO C 9x
868 conjl NEW: ISO C 9x
869 cpow NEW: ISO C 9x
870 cpowf NEW: ISO C 9x
871 cpowl NEW: ISO C 9x
872 cproj NEW: ISO C 9x
873 cprojf NEW: ISO C 9x
874 cprojl NEW: ISO C 9x
875 creal NEW: ISO C 9x
876 crealf NEW: ISO C 9x
877 creall NEW: ISO C 9x
878 creat64 NEW: LFS
879 csin NEW: ISO C 9x
880 csinf NEW: ISO C 9x
881 csinh NEW: ISO C 9x
882 csinhf NEW: ISO C 9x
883 csinhl NEW: ISO C 9x
884 csinl NEW: ISO C 9x
885 csqrt NEW: ISO C 9x
886 csqrtf NEW: ISO C 9x
887 csqrtl NEW: ISO C 9x
888 ctan NEW: ISO C 9x
889 ctanf NEW: ISO C 9x
890 ctanh NEW: ISO C 9x
891 ctanhf NEW: ISO C 9x
892 ctanhl NEW: ISO C 9x
893 ctanl NEW: ISO C 9x
894 des_setparity NEW: Secure RPC
895 ecb_crypt NEW: Secure RPC
896 endutxent NEW: Unix98
897 exp10 NEW: ISO C 9x
898 exp10f NEW: ISO C 9x
899 exp10l NEW: ISO C 9x
900 exp2 NEW: ISO C 9x
901 exp2f NEW: ISO C 9x
902 exp2l NEW: ISO C 9x
903 fattach NEW: STREAMS
904 fdetach NEW: STREAMS
905 fdim NEW: ISO C 9x
906 fdimf NEW: ISO C 9x
907 fdiml NEW: ISO C 9x
908 feclearexcept NEW: ISO C 9x
909 fegetenv NEW: ISO C 9x
910 fegetexceptflag NEW: ISO C 9x
911 fegetround NEW: ISO C 9x
912 feholdexcept NEW: ISO C 9x
913 feof_locked REMOVED
914 feraiseexcept NEW: ISO C 9x
915 ferror_locked REMOVED
916 fesetenv NEW: ISO C 9x
917 fesetexceptflag NEW: ISO C 9x
918 fesetround NEW: ISO C 9x
919 fetestexcept NEW: ISO C 9x
920 feupdateenv NEW: ISO C 9x
921 fflush_locked REMOVED
922 ffsl NEW: GNU ext.
923 ffsll NEW: GNU ext.
924 fgetpos64 NEW: LFS
925 fgets_unlocked NEW: GNU ext.
926 fileno_locked REMOVED
927 fma NEW: ISO C 9x
928 fmaf NEW: ISO C 9x
929 fmal NEW: ISO C 9x
930 fmax NEW: ISO C 9x
931 fmaxf NEW: ISO C 9x
932 fmaxl NEW: ISO C 9x
933 fmin NEW: ISO C 9x
934 fminf NEW: ISO C 9x
935 fminl NEW: ISO C 9x
936 fmtmsg NEW: Unix98
937 fopen64 NEW: LFS
938 fputc_locked REMOVED
939 fputs_unlocked NEW: GNU ext.
940 fread_unlocked NEW: GNU ext.
941 freopen64 NEW: LFS
942 fseeko NEW: Unix98
943 fsetpos64 NEW: LFS
944 fstatfs64 NEW: LFS
945 fstatvfs NEW: Unix98
946 fstatvfs64 NEW: LFS
947 ftello NEW: Unix98
948 ftello64 NEW: LFS
949 ftruncate64 NEW: LFS
950 ftw64 NEW: LFS
951 fwrite_unlocked NEW: GNU ext.
952 gai_strerror NEW: IPv6
953 gamma_r REMOVED
954 gammaf_r REMOVED
955 gammal_r REMOVED
956 getchar_locked REMOVED
957 getdate NEW: Unix98
958 getdate_err NEW: Unix98
959 getdate_r NEW: GNU ext.
960 getmsg NEW: STREAMS
961 getnameinfo NEW: IPv6
962 getnetname NEW: Secure RPC
963 getpmsg NEW: STREAMS
964 getpt NEW: Unix98 PTY
965 getrlimit64 NEW: LFS
966 getutxent NEW: Unix98
967 getutxid NEW: Unix98
968 getutxline NEW: Unix98
969 glob64 NEW: GNU ext.
970 globfree64 NEW: GNU ext.
971 gnu_get_libc_release NEW: GNU ext.
972 gnu_get_libc_version NEW: GNU ext.
973 grantpt NEW: Unix98 PTY
974 host2netname NEW: Secure RPC
975 iconv NEW: iconv
976 iconv_close NEW: iconv
977 iconv_open NEW: iconv
978 if_freenameindex NEW: IPv6
979 if_indextoname NEW: IPv6
980 if_nameindex NEW: IPv6
981 if_nametoindex NEW: IPv6
982 in6addr_any NEW: IPv6
983 in6addr_loopback NEW: IPv6
984 inet6_isipv4mapped NEW: IPv6
985 isastream NEW: STREAMS
986 iswblank NEW: GNU ext.
987 key_decryptsession NEW: Secure RPC
988 key_decryptsession_pk NEW: Secure RPC
989 key_encryptsession NEW: Secure RPC
990 key_encryptsession_pk NEW: Secure RPC
991 key_gendes NEW: Secure RPC
992 key_get_conv NEW: Secure RPC
993 key_secretkey_is_set NEW: Secure RPC
994 key_setnet NEW: Secure RPC
995 key_setsecret NEW: Secure RPC
996 llrint NEW: ISO C 9x
997 llrintf NEW: ISO C 9x
998 llrintl NEW: ISO C 9x
999 llround NEW: ISO C 9x
1000 llroundf NEW: ISO C 9x
1001 llroundl NEW: ISO C 9x
1002 log2 NEW: ISO C 9x
1003 log2f NEW: ISO C 9x
1004 log2l NEW: ISO C 9x
1005 lrint NEW: ISO C 9x
1006 lrintf NEW: ISO C 9x
1007 lrintl NEW: ISO C 9x
1008 lround NEW: ISO C 9x
1009 lroundf NEW: ISO C 9x
1010 lroundl NEW: ISO C 9x
1011 lseek64 NEW: LFS
1012 makecontext NEW: Unix98
1013 mempcpy NEW: GNU ext.
1014 mmap64 NEW: LFS
1015 moncontrol REMOVED
1016 modify_ldt NEW: kernel
1017 nan NEW: ISO C 9x
1018 nanf NEW: ISO C 9x
1019 nanl NEW: ISO C 9x
1020 nearbyint NEW: ISO C 9x
1021 nearbyintf NEW: ISO C 9x
1022 nearbyintl NEW: ISO C 9x
1023 netname2host NEW: Secure RPC
1024 netname2user NEW: Secure RPC
1025 nexttoward NEW: ISO C 9x
1026 nexttowardf NEW: ISO C 9x
1027 nexttowardl NEW: ISO C 9x
1028 nftw NEW: Unix98
1029 nftw64 NEW: LFS
1030 open64 NEW: LFS
1031 passwd2des NEW: Secure RPC
1032 pow10 NEW: GNU ext.
1033 pow10f NEW: GNU ext.
1034 pow10l NEW: GNU ext.
1035 pread NEW: Unix98
1036 pread64 NEW: LFS
1037 printf_size NEW: GNU ext.
1038 printf_size_info NEW: GNU ext.
1039 profil_counter REMOVED
1040 pthread_mutexattr_getkind_np REPLACED
1041 pthread_mutexattr_setkind_np REPLACED
1042 ptsname NEW: Unix98 PTY
1043 ptsname_r NEW: Unix98 PTY
1044 putc_locked REMOVED
1045 putchar_locked REMOVED
1046 putgrent NEW: GNU ext.
1047 putmsg NEW: STREAMS
1048 putpmsg NEW: STREAMS
1049 pututxline NEW: Unix98
1050 pwrite NEW: Unix98
1051 pwrite64 NEW: LFS
1052 readdir64 NEW: LFS
1053 readdir64_r NEW: LFS
1054 remquo NEW: ISO C 9x
1055 remquof NEW: ISO C 9x
1056 remquol NEW: ISO C 9x
1057 round NEW: ISO C 9x
1058 roundf NEW: ISO C 9x
1059 roundl NEW: ISO C 9x
1060 rtime NEW: GNU ext.
1061 scalbln NEW: ISO C 9x
1062 scalblnf NEW: ISO C 9x
1063 scalblnl NEW: ISO C 9x
1064 scandir64 NEW: LFS
1065 sendfile NEW: kernel
1066 setcontext NEW: Unix98
1067 setrlimit64 NEW: LFS
1068 setutxent NEW: Unix98
1069 sighold NEW: Unix98
1070 sigignore NEW: Unix98
1071 sigqueue NEW: POSIX.1b
1072 sigrelse NEW: Unix98
1073 sigset NEW: POSIX.1b
1074 sigtimedwait NEW: POSIX.1b
1075 sigwaitinfo NEW: POSIX.1b
1076 sincos NEW: GNU ext.
1077 sincosf NEW: GNU ext.
1078 sincosl NEW: GNU ext.
1079 statfs64 NEW: LFS
1080 statvfs NEW: Unix98
1081 statvfs64 NEW: LFS
1082 strcasestr NEW: GNU ext.
1083 strtoimax NEW: ISO C 9x
1084 strtoumax NEW: ISO C 9x
1085 strverscmp NEW: GNU ext.
1086 svcauthdes_stats NEW: Secure RPC
1087 svcunix_create NEW: sunrpc etx
1088 svcunixfd_create NEW: sunrpc ext
1089 swapcontext NEW: Unix98
1090 tcgetsid NEW: Unix98 PTY
1091 tdestroy NEW: GNU ext.
1092 tgamma NEW: ISO C 9x
1093 tgammaf NEW: ISO C 9x
1094 tgammal NEW: ISO C 9x
1095 tmpfile64 NEW: LFS
1096 trunc NEW: ISO C 9x
1097 truncate64 NEW: LFS
1098 truncf NEW: ISO C 9x
1099 truncl NEW: ISO C 9x
1100 umount2 NEW: kernel
1101 unlockpt NEW: Unix98 PTY
1102 updwtmpx NEW: Unix98
1103 user2netname NEW: Secure RPC
1104 utmpxname NEW: Unix98
1105 versionsort NEW: GNU ext.
1106 versionsort64 NEW: GNU ext.
1107 waitid NEW: Unix98
1108 wcscasecmp NEW: GNU ext.
1109 wcsncasecmp NEW: GNU ext.
1110 wcsnlen NEW: GNU ext.
1111 wcstoimax NEW: ISO C 9x
1112 wcstoll NEW: ISO C 9x
1113 wcstoull NEW: ISO C 9x
1114 wcstoumax NEW: ISO C 9x
1115 wcswcs NEW: Unix98
1116 wordexp NEW: POSIX.2
1117 wordfree NEW: POSIX.2
1118 write_profiling REMOVED
1119 xdecrypt NEW: Secure RPC
1120 xdr_authdes_cred NEW: Secure RPC
1121 xdr_authdes_verf NEW: Secure RPC
1122 xdr_cryptkeyarg NEW: Secure RPC
1123 xdr_cryptkeyarg2 NEW: Secure RPC
1124 xdr_cryptkeyres NEW: Secure RPC
1125 xdr_getcredres NEW: Secure RPC
1126 xdr_key_netstarg NEW: Secure RPC
1127 xdr_key_netstres NEW: Secure RPC
1128 xdr_keybuf NEW: Secure RPC
1129 xdr_keystatus NEW: Secure RPC
1130 xdr_netnamestr NEW: Secure RPC
1131 xdr_sizeof NEW: Secure RPC
1132 xdr_unixcred NEW: sunrpc ext
1133 xencrypt NEW: Secure RPC
1134 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1135 \f
1136 Version 2.0.6
1138 * more bug fixes
1140 \f
1141 Version 2.0.5
1143 * more bug fixes
1145 * inet_ntoa is thread-safe
1147 * updwtmp is moved from libutil to libc
1149 * rewrite of cbrt function
1151 * update of timezone data
1152 \f
1153 Version 2.0.4
1155 * more bug fixes
1156 \f
1157 Version 2.0.3
1159 * more bug fixes
1160 \f
1161 Version 2.0.2
1163 * more bug fixes
1165 * add atoll function
1167 * fix complex problems in Berkeley DB code
1169 * fix math functions
1170 \f
1171 Version 2.0.1
1173 * fixed lots of header problems (especially Linux/GNU specific)
1175 * dynamic loader preserves all registers
1177 * Roland McGrath provided support for handling of auxiliary objects in
1178 the ELF dynamic loader.
1180 * support for parallel builds is improved
1181 \f
1182 Version 2.0
1184 * GNU extensions are no longer declared by default. To enable them you
1185 must define the macro `_GNU_SOURCE' in your program or compile with
1186 `-D_GNU_SOURCE'.
1188 * The library has changed from using GNU ld symbol aliases to using weak
1189 symbols where available. The ELF object file format supports weak
1190 symbols; GNU ld also supports weak symbols in the a.out format. (There
1191 is also now support for other GNU ld extensions in ELF. Use the
1192 `--with-elf' option to configure to indicate you have ELF, and
1193 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1194 of many files which contained only symbol aliases, reducing the size of
1195 the source and the compiled library; many other files were renamed to
1196 less cryptic names previously occupied by the symbol alias files.
1197 There is a new header file <elf.h> for programs which operate on
1198 files in the ELF format.
1200 * Converted to Autoconf version 2, so `configure' has more options.
1201 Run `configure --help' to see the details.
1203 * The library can now be configured to build profiling, highly-optimized
1204 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1205 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1206 `configure' enable building these extra libraries. The shared library is
1207 built by default when using both ELF and GNU ld. When shared libraries
1208 are enabled, the new library `-ldl' is available for arbitrary run-time
1209 loading of shared objects; its interface is defined in <dlfcn.h>. The
1210 new header file <link.h> gives access to the internals of the run-time
1211 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1212 application of same name on other systems and it provides information
1213 about dynamically linked binaries.
1215 * The C library now provides the run-time support code for profiling
1216 executables compiled with `-pg'. Programs can control the profiling code
1217 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1218 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1219 the support for this file format was contributed by David Mosberger-Tang.
1221 * The math code has been replaced with a math library based on fdlibm from
1222 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1223 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1224 functions. The math functions now reside in a separate library, so
1225 programs using them will need to use `-lm' their linking commands.
1227 * John C. Bowman contributed optimized ix87 assembler inline functions.
1229 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1230 mechanism similar to that found in Solaris 2. This is now used for the
1231 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1232 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1233 file controls what services are used for each individual database. This
1234 works by loading shared libraries with names specified in `nsswitch.conf',
1235 so service modules can be changed or added at any time without even
1236 relinking any program. Currently there are the file, db, and NIS based
1237 NSS services available.
1239 * The new functions `strtoq' and `strtouq' parse integer values from
1240 strings, like `strtol' and `strtoul', but they return `long long int' and
1241 `unsigned long long int' values, respectively (64-bit quantities).
1243 * The new functions `strtof' and `strtold' parse floating-point values from
1244 strings, like `strtod', but they return `float' and `long double' values,
1245 respectively (on some machines `double' and `long double' are the same).
1247 * Ulrich Drepper has contributed new implementations of the floating-point
1248 printing and reading code used in the `printf' family of functions and
1249 `strtod', `strtof', and `strtold'. These new functions are perfectly
1250 accurate, and much faster than the old ones.
1252 * The implementation of the POSIX locale model was completely rewritten by
1253 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1254 to compile the POSIX locale definition.
1256 * The former dummy implementations of the strcoll and strxfrm function are
1257 now replaced by fully functional code contributed by Ulrich Drepper. The
1258 collation information comes from the POSIX locale definitions.
1260 * The new header <langinfo.h> defines an interface for accessing
1261 various locale-dependent data (using the locale chosen with `setlocale').
1263 * Ulrich Drepper has contributed a new suite of functions for operation on
1264 wide-character and multibyte-character strings, in <wchar.h>;
1265 and classification and case conversion of wide characters, in <wctype.h>.
1266 These new functions are conforming to the ISO C, Amendement 1 specification.
1268 * There is now a second implementation of the standard I/O library available.
1269 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1270 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1272 * You can now use positional parameter specifications in format strings
1273 for the `printf' and `scanf' families of functions. For example,
1274 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1275 ``Number 6, Mr Jones''. This is mainly useful when providing different
1276 format strings for different languages, whose grammars may dictate
1277 different orderings of the values being printed. To support this
1278 feature, the interface for `register_printf_handler' has changed; see
1279 the header file <printf.h> for details.
1281 * The `printf' and `scanf' families of functions now understand a new
1282 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1283 to group numbers as indicated by the locale; for `scanf' and friends, this
1284 says to accept as valid only a number with all the proper grouping
1285 separators in the right places. In the default "C" locale, numbers are
1286 not grouped; but locales for specific countries will define the usual
1287 conventions (i.e. separate thousands with `,' in the US locale).
1289 * The pgrp functions have been regularized, slightly incompatibly but much
1290 less confusingly. The core functions are now `getpgid' and `setpgid',
1291 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1292 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1293 provided for compatibility. There is no longer an incompatible `getpgrp'
1294 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1296 * The new header file <fts.h> and suite of functions simplify programs that
1297 operate on directory trees. This code comes from 4.4 BSD.
1299 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1300 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1301 NSS scheme used in glibc.
1303 * There is a new malloc debugging hook `__memalign_hook'.
1305 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1306 `unsigned int' in <sys/types.h>. These are for compatibility only and
1307 their use is discouraged.
1309 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1310 done differently, so that it works even without GNU ld.
1312 * New function `euidaccess' checks allowed access to a file like `access',
1313 but using the effective IDs instead of the real IDs.
1315 * The time zone data files have been updated for the latest and greatest
1316 local time conventions of the countries of the world.
1318 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1319 see <dirent.h>.
1321 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1322 for formatting floating-point numbers. They are provided only for
1323 compatibility; new programs should use `sprintf' instead. There are
1324 also equivalent function for the `long double' floating-point type and
1325 all functions also exist in a reentrant form.
1327 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1328 functions for maintaining the login-record files (primarily of use to
1329 system programs such as `login'), and convenient functions for
1330 allocating and initializing a pseudo-terminal (pty) device.
1332 * Ulrich Drepper has contributed new support for System V style
1333 shared memory and IPC on systems that support it.
1335 * Ulrich Drepper has contributed several miscellaneous new functions found
1336 in System V: The `hsearch' family of functions provide an effective
1337 implementation of hash tables; `a64l' and `l64a' provide a very simple
1338 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1339 number generator.
1341 * Ulrich Drepper has contributed new reentrant counterparts for the
1342 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1344 * Ulrich Drepper has contributed new, highly-optimized versions of several
1345 string functions for the i486/Pentium family of processors.
1347 * Ulrich Drepper has updated the Linux-specific code, based largely
1348 on work done in Hongjiu Lu's version of GNU libc for Linux.
1349 The GNU library now supports Linux versions 2.0.10 and later,
1350 using the ELF object file format (i[3456]86-*-linux).
1352 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1354 * David Mosberger-Tang and Richard Henderson have ported the C library
1355 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1356 dynamic linking support for ELF/Alpha.
1358 * Richard Henderson contributed several Alpha optimized assembler function
1359 for arithmetic and string handling.
1361 * Ulrich Drepper has contributed a new set of message catalog functions to
1362 support multiple languages using the <libintl.h> interface, for use with
1363 his new package GNU gettext. Translation volunteers have contributed
1364 catalogs of the library's messages in Spanish, German, and Korean.
1366 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1367 program and the `catgets' function for reading the catalog files it
1368 creates. (The <libintl.h> interface is preferred; we include the
1369 <nl_types.h> interface using `catgets' only for source compatibility with
1370 programs already written to use it.)
1372 * New header file <values.h> gives SVID-compatible names for <limits.h>
1373 constants.
1375 * Various new macros, declarations, and small header files for compatibility
1376 with 4.4 BSD.
1378 * New function `group_member' is a convenient way to check if a process has
1379 a given effective group ID.
1381 * When using GCC 2.7 and later, the socket functions are now declared in a
1382 special way so that passing an argument of type `struct sockaddr_in *',
1383 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1384 `struct sockaddr *' type, does not generate a type-clash warning.
1386 * New function `error' declared in header file <error.h> is a convenient
1387 function for printing error messages and optionally exiting; this is the
1388 canonical function used in GNU programs. The new functions `err', `warn',
1389 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1390 doing the same thing.
1392 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1393 POSIX.2 `glob' function to do ~ and {...} expansion.
1395 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1396 `clearenv' which is used in POSIX.9 is also available.
1398 * New function `getsid' returns session ID number on systems that support it.
1400 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1401 files <db.h> and <mpool.h> provide a rich set of functions for several
1402 types of simple databases stored in memory and in files, and <ndbm.h> is
1403 an old `ndbm'-compatible interface using the `db' functions. Link with
1404 `-ldb' to get these functions.
1406 * New macro `strdupa' copies a string like `strdup', but uses local stack
1407 space from `alloca' instead of dynamic heap space from `malloc'.
1409 * New function `strnlen' is like `strlen' but searches only a given maximum
1410 number of characters for the null terminator. `stpncpy', `strndup' and
1411 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1412 function.
1414 * New function `statfs' in header <sys/statfs.h>.
1416 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1417 provide convenient functions for operating on blocks of null-terminated
1418 strings.
1420 * A new suite of functions in <utmp.h> handle all the details of reading
1421 and writing the utmp file.
1423 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1424 Thorsten Kukuk.
1426 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1427 completely POSIX compliant and also implemented the extended functionality
1428 to handle alternate digit representation and alternate era date formats.
1430 * Ulrich Drepper provided an implementation of the `strptime' function
1431 defined in XPG4.2 which transforms a string into a `struct tm' value.
1433 * Paul Eggert provided the tzselect shell script as part of the timezone
1434 code. The shell script makes it easy to select the correct timezone
1435 specification.
1437 * The implementation of the malloc family of functions is completely replaced
1438 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1439 The implementation uses the mmap function (if available) and it is
1440 optimized for the use in multi threaded programs.
1442 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1443 functions. This new functionality is usable by specifying a special
1444 salt string and it is compatible with implementation on *BSD systems.
1446 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1447 `getsubopt' to handle second level command line options, `bsd_signal'
1448 to access BSD style `signal' functionality, the obsolete `regexp' style
1449 expression matcher.
1451 * the `lchown' function is available on system which support this
1452 functionality.
1454 * The implementation of the shadow password handling function was contributed
1455 by Ulrich Drepper.
1457 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1459 * POSIX.1g support was added. The <sys/select.h> header is available,
1460 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1461 implementation of `getaddrinfo'.
1462 \f
1463 Version 1.09
1465 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1467 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1468 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1470 * The new function `daemon' from 4.4 BSD is useful for server programs that
1471 want to put themselves in the background.
1473 * Joel Sherrill has contributed support for several standalone boards that
1474 run without an operating system.
1476 * `printf', `scanf' and friends now accept a `q' type modifier for long
1477 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1479 * All of the code taken from BSD (notably most of the math and networking
1480 routines) has been updated from the BSD 4.4-Lite release.
1482 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1484 * The new functions `getdomainname' and `setdomainname' fetch or change the
1485 YP/NIS domain name. These are system calls which exist on systems which
1486 have YP (aka NIS).
1488 * The time zone data files have been updated for the latest international
1489 conventions.
1491 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1492 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1493 \f
1494 Version 1.08
1496 * The C library now includes support for Sun RPC, from Sun's free
1497 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1498 are included. (There is still no support for YP.)
1500 * Tom Quinn has contributed a port of the C library to SGI machines running
1501 Irix 4 (mips-sgi-irix4).
1503 * The new `lockf' function is a simplified interface to the locking
1504 facilities of `fcntl', included for compatibility.
1506 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1508 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1510 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1511 compatibility.
1513 * The error message printed by `assert' for a failed assertion now includes
1514 the name of the program (if using GNU ld) and the name of the calling
1515 function (with versions of GCC that support this).
1517 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1519 * The library now includes the <sys/mman.h> header file and memory
1520 management functions `mmap', `munmap', `mprotect', `msync', and
1521 `madvise', on systems that support those facilities.
1523 * The interface for `mcheck' has changed slightly: the function called to
1524 abort the program when an allocation inconsistency is detected now takes
1525 an argument that indicates the type of failure. The new function
1526 `mprobe' lets you request a consistency check for a particular block at
1527 any time (checks are normally done only when you call `free' or `realloc'
1528 on a block).
1530 * It is now possible to easily cross-compile the C library, building on one
1531 system a library to run on another machine and/or operating system. All
1532 you need to do is set the variable `HOST_CC' in `configparms' to the
1533 native compiler for programs to run on the machine you are building on (a
1534 few generator programs are used on Unix systems); set `CC' to the
1535 cross-compiler.
1537 * The new function `fexecve' (only implemented on the GNU system) executes
1538 a program file given a file descriptor already open on the file.
1539 \f
1540 Version 1.07
1542 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1543 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1545 * You can set the variable `libprefix' in `configparms' to specify a prefix
1546 to be prepended to installed library files; this makes it easy to install
1547 the GNU C library to be linked as `-lgnuc' or whatever.
1549 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1550 copies a limited number of characters from a string, and returns the
1551 address of the last character written.
1553 * You no longer need to check for whether the installed `stddef.h' is
1554 compatible with the GNU C library. configure now checks for you.
1556 * You can now define a per-stream `fileno' function to convert the
1557 stream's cookie into an integral file descriptor.
1559 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1560 allocates zero bytes of storage, and returns a unique pointer which
1561 you can pass to `realloc' or `free'. The behavior is undefined if
1562 you dereference this pointer.
1564 * The C library now runs on Sony NEWS m68k machines running either
1565 NewsOS 3 or NewsOS 4.
1567 * The new `syscall' function is a system-dependent primitive function
1568 for invoking system calls. It has the canonical behavior on Unix
1569 systems, including unreliable return values for some calls (such as
1570 `pipe', `fork' and `getppid').
1572 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1573 to `EAGAIN', which is the preferred name. On systems whose kernels
1574 use two distinct codes, the C library now translates EWOULDBLOCK to
1575 EAGAIN in every system call function.
1576 \f
1577 Version 1.06
1579 * The GNU C Library Reference Manual is now distributed with the library.
1580 `make dvi' will produce a DVI file of the printed manual.
1581 `make info' will produce Info files that you can read on line using C-h i
1582 in Emacs or the `info' program.
1583 Please send comments on the manual to bug-glibc-manual@gnu.org.
1585 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1587 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1589 * Jason Merrill has contributed a port to the Sequent Symmetry running
1590 Dynix version 3 (i386-sequent-dynix).
1592 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1593 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1595 * New function `memory_warnings' lets you arrange to get warnings when
1596 malloc is running out of memory to allocate, like Emacs gives you.
1598 * The C library now contains the relocating allocator used in Emacs 19 for
1599 its editing buffers. This allocator (ralloc) minimizes allocation
1600 overhead and fragmentation by moving allocated regions around whenever it
1601 needs to. You always refer to a ralloc'd region with a "handle" (a
1602 pointer to a pointer--an object of type `void **').
1604 * There is a new `printf' format: `%m' gives you the string corresponding
1605 to the error code in `errno'.
1607 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1608 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1609 pass, the `a' modifier says to fill in a `char **' you pass with a
1610 malloc'd string.
1612 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1613 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1614 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1616 * `mkstemp' is a traditional Unix function to atomically create and open a
1617 uniquely-named temporary file.
1618 \f
1619 Version 1.05
1621 * The standard location for the file that says what the local timezone is
1622 has changed again. It is now `/usr/local/etc/localtime' (or more
1623 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1625 * The distribution no longer contains any files with names longer than 14
1626 characters.
1628 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1629 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1631 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1632 \f
1633 Version 1.04
1635 * The configuration process has changed quite a bit. The `configure'
1636 script is now used just like the configuration scripts for other GNU
1637 packages. The `sysdeps' directory hierarchy is much rearranged.
1638 The file `INSTALL' explains the new scheme in detail.
1640 * The header files no longer need to be processed into ANSI C and
1641 traditional C versions. There is just one set of files to install, and
1642 it will work with ANSI or old C compilers (including `gcc -traditional').
1644 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1645 MIPS DECStation running Ultrix 4.
1647 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1648 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1649 made itself into a shared library.
1651 * Yet further improved support for the i386, running 4.3 BSD-like systems
1652 (such as Mach 3 with the Unix single-server), or System V.
1654 * New function `strncasecmp' to do case-insensitive string comparison
1655 with limited length.
1657 * New function `strsep' is a reentrant alternative to `strtok'.
1659 * New functions `scandir' and `alphasort' for searching directories.
1661 * New function `setenv' is a better interface to `putenv'.
1663 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1664 function for traversing a directory tree.
1666 * The GNU obstack package is now also part of the C library.
1667 The new function `open_obstack_stream' creates a stdio stream that
1668 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1669 formatted output directly to an obstack.
1671 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1672 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1674 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1676 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1677 things to your strings.
1679 * There are some new test programs: test-fseek, testmb, and testrand.
1681 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1682 These ports are not finished, but are a good starting place for really
1683 supporting those systems.
1685 * `/etc/localtime' is now the standard location for the file that says what
1686 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1687 This follows the general principle that `/etc' is the place for all local
1688 configuration files.
1690 * The C library header files now use `extern "C"' when used by the C++
1691 compiler, so the C library should now work with C++ code.
1693 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1694 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
1695 in <strings.h>.)
1697 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1698 function which uses the `merge sort' algorithm, and is said to be
1699 significantly faster than the old GNU `qsort' function. Merge sort is
1700 now the standard `qsort' function. The new algorithm can require a lot
1701 of temporary storage; so, the old sorting function is called when the
1702 required storage is not available.
1704 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1705 provides the Unix `crypt' function, plus some other entry points.
1707 * The code and header files taken from 4.4 BSD have been updated with the
1708 latest files released from Berkeley.
1709 \f
1710 ----------------------------------------------------------------------
1711 Copyright information:
1713 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1714 Free Software Foundation, Inc.
1716 Permission is granted to anyone to make or distribute verbatim copies
1717 of this document as received, in any medium, provided that the
1718 copyright notice and this permission notice are preserved,
1719 thus giving the recipient permission to redistribute in turn.
1721 Permission is granted to distribute modified versions
1722 of this document, or of portions of it,
1723 under the above conditions, provided also that they
1724 carry prominent notices stating who last changed them.
1725 \f
1726 Local variables:
1727 version-control: never
1728 End: