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1 GNU C Library NEWS -- history of user-visible changes. 2008-8-2
2 Copyright (C) 1992-2007, 2008 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sources.redhat.com/bugzilla/>
6 using `glibc' in the "product" field.
7 \f
8 Version 2.9
10 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
11 up at the same time. Implemented by Ulrich Drepper.
13 * TLS descriptors for LD and GD on x86 and x86-64.
14 Implemented by Alexandre Oliva.
16 * getaddrinfo now handles DCCP and UDPlite.
17 Implemented by Ulrich Drepper.
19 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
20 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
21 Implemented by Ulrich Drepper.
23 * New implementation of memmem, strstr, and strcasestr which is O(n).
24 Implemented by Eric Blake.
26 * New Linux interfaces: inotify_init1, paccept, dup3, epoll_create1, pipe2
28 * Implement "e" option for popen to open file descriptor with the
29 close-on-exec flag set. Implemented by Ulrich Drepper.
31 * Many functions, exported and internal, now atomically set the close-on-exec
32 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
34 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu)
35 Implemented by Pravin Satpute.
36 \f
37 Version 2.8
39 * New locales: bo_CN, bo_IN, shs_CA.
41 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
43 * Sorting rules for some Indian languages (Devanagari and Gujarati).
44 Implemented by Pravin Satpute.
46 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
48 * nscd caches now all timeouts for DNS entries
49 Implemented by Ulrich Drepper.
51 * nscd is more efficient and wakes up less often.
52 Implemented by Ulrich Drepper.
54 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
55 vdprintf, and obstack_vprintf.
56 Implemented by Jakub Jelinek.
58 * Faster memset for x86-64.
59 Implemented by Harsha Jagasia and H.J. Lu.
61 * Faster memcpy on x86.
62 Implemented by Ulrich Drepper.
64 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
65 Implemented by Ulrich Drepper.
67 * Faster sqrt and sqrtf implemention for some PPC variants.
68 Implemented by Stephen Munroe.
69 \f
70 Version 2.7
72 * More checking functions: fread, fread_unlocked, open*, mq_open.
73 Implemented by Jakub Jelinek and Ulrich Drepper.
75 * Extend fortification to C++. Implemented by Jakub Jelinek.
77 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
78 by not recognizing 'a' as a modifier when those specs are requested.
79 Implemented by Jakub Jelinek.
81 * PPC optimizations to math and string functions.
82 Implemented by Steven Munroe.
84 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
85 options to be passed. Implemented by Ulrich Drepper.
87 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
89 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
90 Implemented by Ulrich Drepper.
92 * Handle private futexes in the NPTL implementation.
93 Implemented by Jakub Jelinek and Ulrich Drepper.
95 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
96 Implemented by Roland McGrath and Ulrich Drepper.
98 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
100 * SHA-256 and SHA-512 based password encryption.
101 Implemented by Ulrich Drepper.
103 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
104 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
105 yo_NG.
107 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
108 Implemented by Ulrich Drepper.
109 \f
110 Version 2.6
112 * New Linux interfaces: epoll_pwait, sched_getcpu.
114 * New generic interfaces: strerror_l.
116 * nscd can now cache the services database. Implemented by Ulrich Drepper.
118 \f
119 Version 2.5
121 * For Linux, the sorting of addresses returned by getaddrinfo now also
122 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
123 Implemented by Ulrich Drepper.
125 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
126 Implemented by Ulrich Drepper.
128 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
130 * New iconv module for MIK. Contributed by Alexander Shopov.
132 * For sites with broken group and/or passwd database, the auto-propagate
133 option of nscd can prevent creating ID lookup entries from the results
134 of a name lookup and vice versa. This usually is no problem but some
135 site might have problems with the default behavior.
136 Implemented by Ulrich Drepper.
138 * Iterating over entire database in NIS can be slow. With the
139 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
140 to trade time for memory. The entire database will be read at once.
141 Implemented by Ulrich Drepper.
143 * The interfaces introduced in RFC 3542 have been implemented by
144 Ulrich Drepper.
146 * Support for the new ELF hash table format was added by Ulrich Drepper.
148 * Support for priority inheritance mutexes added by Jakub Jelinek and
149 Ulrich Drepper.
151 * Support for priority protected mutexes added by Jakub Jelinek.
153 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
154 or_IN, csb_PL, fy_NL, sr_ME.
155 \f
156 Version 2.4
158 * More overflow detection functions.
160 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
161 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
163 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
164 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
165 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
166 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
167 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
168 by Masahide Washizawa.
170 * It is now possible to install audit libraries for the dynamic linker using
171 LD_AUDIT. Implemented by Ulrich Drepper.
173 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
174 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
175 For a libc and libpthread that works well on Linux 2.4 kernels, we
176 recommend using the stable 2.3 branch.
178 * The new function open_wmemstream acts like open_memstream,
179 but uses a wchar_t wide character buffer.
181 * The new function ppoll is an improved version of poll, similar to pselect.
183 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
184 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
185 renameat, unlinkat, linkat, symlinkat, readlinkat.
187 * New Linux kernel system calls: unshare,
188 inotify_init, inotify_add_watch, inotify_rm_watch.
190 * The euidaccess function is now also known by the alias eaccess,
191 for compatibility with some other systems.
193 * Timezone data updated to 2006b version.
194 \f
195 Version 2.3.6
197 * The following bugs are resolved with this release:
199 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
200 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
201 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
202 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
203 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
204 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
206 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
208 * As of this release, GCC 4 can be used to compile the C Library.
210 * Timezone data updated to 2005m version.
211 \f
212 Version 2.3.5
214 * The following bugs are resolved with this release:
216 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
217 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
218 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
219 777, 787, 821, 822, 823, 825
221 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
222 \f
223 Version 2.3.4
225 * Support for RFC 3678. Real implementations exist only for Linux so far.
226 Implemented by Ulrich Drepper.
228 * nscd can now cache entries persistently. Expiring entries are reloaded.
229 For speedups the cache can be shared in memory with client processes.
230 Implemented by Ulrich Drepper.
232 * nscd can now perform SELinux checks.
233 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
235 * getaddrinfo queries are now cached. Canonical name lookup is performed
236 efficiently.
237 Implemented by Ulrich Drepper.
239 * The nothrow function attribute is used when headers are used by gcc when
240 compiling C code. This can avoid significant amounts of exception
241 handling data.
243 * The malloc functions perform more error checking and are stricter when
244 it comes to reacting on errors. The default action is to terminate
245 the process after showing an error message. Implemented by Ulrich Drepper.
247 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
248 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
250 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
251 namespaces using the new function dlmopen(). This feature is of course,
252 like most other dynamic loading functionality, not available in statically
253 linked applications. Implemented by Ulrich Drepper.
255 * Low-overhead boundary checking variants of string and some stdio functions
256 were added. These are to be used in conjunction with a gcc patch by
257 Jakub Jelinek which adds calls to these functions if possible.
258 Implemented by Jakub Jelinek and Ulrich Drepper.
260 * Old code for several operating systems and machine architectures that
261 have not been in working condition in a long time have been removed from
262 the main source tree maintained by the GNU C Library's maintainers.
263 These files are now reside in the separate `ports' source module
264 that is usable as an add-on when building the library.
265 \f
266 Version 2.3.3
268 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
269 interrogate the dynamic linker, compatible with the Solaris interface.
271 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
272 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
274 * getifaddrs now uses the netlink interface on Linux to get its information.
275 Implemented by Thorsten Kukuk.
277 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
278 Implemented by Ulrich Drepper.
280 * support for non-executable stacks on x86 has been added. Changes mostly
281 by Roland McGrath.
283 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
284 and Ulrich Drepper.
286 * getaddrinfo now performs destination address selection according to
287 RFC 3484.
288 \f
289 Version 2.3.2
291 * Thread-safe interfaces for many functions that access locale data
292 were added in version 2.3, but these features were omitted from NEWS.
293 Many functions have variants with an `_l' suffix that take a `locale_t'
294 object as a parameter rather than consulting the current locale.
295 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
296 create and maintain `locale_t' objects. Additionally, the new function
297 `uselocale' sets "the current locale" (as used by functions not so
298 parameterized) set for an individual thread. These features were added
299 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
301 * The functions getresuid, getresgid, setresuid, and setresgid, which
302 have long been available on Linux, are now declared in <unistd.h>
303 and are now also available on the Hurd.
305 * ELF thread-local storage support (TLS) now works on x86-64.
307 * The new dynamic string token $LIB is expanded in shared library names.
308 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
310 * Aldy Hernandez contributed complete software floating point support for
311 PowerPC machines with no FPU.
313 * fexecve is implemented on Linux.
315 * The `btowc' function should work at least twice as fast due to
316 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
318 * With approriate thread add-ons cancelable functions are now implemented
319 in libc.so as well. No need to call the function in libpthread. This
320 change allowed to finally disable the incorrect and expensive handling
321 of weak definition in ld.so.
323 * Yet more PLT entries in libc.so have been removed. We finally arrived
324 at the bare minimum. Startup times improved appropriately.
326 * Support for the new Linux/x86 system call interface was added. The
327 AT_SYSINFO auxiliary vector entry is recognized and handled.
328 \f
329 Version 2.3
331 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
332 charsets.
334 * iconv (the program and the interface) now accepts empty names (excluding
335 options like //TRANSLIT) to mean "use charset of current locale".
337 * localedef can now transliterate characters in strings which are not in
338 the provided charmap. The information from the input locale is used.
340 * Prelinking support was added for ELF targets. This requires additional
341 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
343 * Read-only stdio streams now use mmap to speed up operation by eliminating
344 copying and buffer underflows. To use add 'm' to the mode string of
345 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
347 * The malloc functions were completely rewritten by Wolfram Gloger based
348 on Doug Lea's malloc-2.7.0.c.
350 * Isamu Hasegawa contributed a completely new and POSIX-conformant
351 implementation of regex.
353 * Bruno Haible upgraded the iconv and locale implementation to support
354 Unicode 3.2.
356 * Contents of the LC_* and LANG environment variables in the CEN style are
357 not recognized anymore. It never was used. Change by Ulrich Drepper.
359 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
360 thread-local storage (TLS) ABI on some platforms.
361 Changes by Ulrich Drepper. SH support by Kaz Kojima.
363 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
364 EUC-JISX0213, and TSCII.
366 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
367 BSD-compatible interface for getting all network interface addresses.
368 Implementation for IPv4 by Roland McGrath.
370 * Loading of locale data is faster due to the introduction of a locale
371 archive. Implemented by Roland McGrath and Ulrich Drepper.
373 * Startup times are significantly reduced by not using exported functions
374 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
375 and Ulrich Drepper.
377 * Steven Munroe contributed a port to PowerPC64/Linux.
378 \f
379 Version 2.2.6
381 * The Hurd now uses the GNU libio implementation of stdio rather than the
382 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
384 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
385 with the same behavior as the Linux system call of the same name.
386 \f
387 Version 2.2.5
389 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
390 128-bit long double format.
392 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
393 IBM1161, and IBM1162 charsets.
395 * Andreas Jaeger contributed a port to x86-64/Linux.
397 * Peter Bruin contributed a port to PowerPC/Hurd.
399 * libc functions using I/O streams now can handle wide-oriented streams
400 as well.
402 * optimizations in the dynamic linker. Binaries created by recent binutils
403 versions start up quicker due to reduced time spent on relocations.
405 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
406 \f
407 Version 2.2.4
409 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
410 asinh, atanh, j0 for the 128-bit long double format.
412 * Bruno Haible updated all the code handling Unicode in some form to
413 support Unicode 3.1.
415 * Speed of regex for single-byte locales is back to previous levels.
416 Patch by Isamu Hasegawa.
418 * Alpha, SPARC, and IA-64 now also using floating stacks.
420 * Startup time of internationalized applications greatly improved through
421 iconv cache. Use iconvconfig to generate the cache file.
422 Contributed by Ulrich Drepper.
424 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
425 severe performance problems. Patch by David Mosberger.
427 * The Hurd port got a lot more functionality like AIO, various stdio
428 extensions, etc. Mainly done by Roland McGrath.
430 * mtrace can now lookup symbols in shared libraries.
431 \f
432 Version 2.2.3
434 * Intel's IA-64 math library is largely integrated. It provides fast and
435 accurate implementatations for most basic and standard math functions
436 in float, double, and long double format.
438 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
439 and asin for the 96-bit long double format and asin, log, tan for the
440 128-bit long double format.
442 * The beginning of a last-bit accurate math library by IBM Haifa were added.
443 The basic double functions exist today. Contributed by Abraham Ziv
444 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
445 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
447 * An asynchronous name lookup library was added. The interface is designed
448 after POSIX AIO. The proposal was circulated beforehand to get comments.
449 No negative ones came in. Implemented by Ulrich Drepper.
451 * Port to S390/64bit contributed by Martin Schwidefsky
452 <schwidefsky@de.ibm.com>.
454 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
455 of functions for Linux/IA-64.
457 * The RPC code is now thread safe. Threads can now use the same service
458 of different services at the same time. Patch by Eric Norum
459 <eric.norum@usask.ca> with some help by Ulrich Drepper.
461 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
462 family of functions for Linux/S390.
464 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
465 of functions for Linux/x86.
467 * Port to Linux/CRIS contributed by Axis Communications.
468 \f
469 Version 2.2.2
471 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
472 we can now check for namespace violations and missing declarations. The
473 result is that almost all headers are now Unix-compliant (as defined in
474 the upcoming XPG6). The negative side is that some programs might need
475 corrections, too, if they depend on the incorrect form of the headers in
476 previous versions which defined too many symbols and included too many
477 other headers.
479 * regex now handles multibyte character sets correctly.
480 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
482 * iconv (the program) does now conform to the upcoming XPG6 and handles
483 charmaps. Instead of the charset names the path of charmaps can be
484 provided and the conversion happens based on this data.
485 Contributed by Ulrich Drepper.
487 * The locale program now provides detailed information about the installed
488 locales. While
490 locale -a
492 only lists the names of the supported locales
494 locale -a --verbose
496 provides details such as country, language, and codeset name.
497 Contributed by Ulrich Drepper.
498 \f
499 Version 2.2.1
501 * The gencat program now parses the input file according to the charset
502 selected by the LC_CTYPE category. This is important for stateful
503 character sets. To make generating catalogs easier there is a way
504 to overwrite the charset selected by the locale: before the first
505 message or $ quote line the catalog can contain a line like
507 $ codeset=ISO-8859-2
509 to select the charset (ISO-8859-2 in this case).
511 Implemented by Shinya Hanataka and Ulrich Drepper.
513 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
514 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
515 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
517 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
518 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
520 * The LANGUAGE environment variable is now ignored unless the locale is
521 changed from the default "C" locale.
523 * The usual bug fixes.
524 \f
525 Version 2.2
527 * Greg McGary added runtime support for bounds checking using gcc's
528 new -fbounded-pointers option. ix86 target is complete. PowerPC
529 is in progress.
531 * Thorsten Kukuk added secure mode support to nscd.
533 * The Berkeley db libraries have been removed.
535 Related, the nss_db module is now in a separate package since it
536 obviously requires a database library being available.
538 * Wide character I/O streams implemented by Ulrich Drepper.
540 * Functions from the extended socket API added by Ulrich Drepper.
542 * Functions feenableexcept and fedisableexcept to control the
543 behaviour of individual exceptions have been added by Andreas Jaeger.
545 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
547 * The resolver code has been updated from bind 8.2.3-T5B which supports
548 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
549 and Mark Kettenis.
551 This change could in some situations effect backward compatibility. Since
552 now `_res' is a thread-local instead of a global variable, modifying it
553 in one thread does not have any effect in other threads.
555 The resolver library was also extended to allow IPv6 as the transport
556 protocol for the requests. This work was done by Stig Venaas.
558 * Compatibility code for K&R C compilers has been removed from the
559 header files. A ISO C compiler is needed to use the library
560 (conforming to either C89 or C99 standard).
562 * Complete rewrite of the localedef program to support multibyte character
563 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
564 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
565 Implemented by Ulrich Drepper.
567 Bruno Haible significantly improved the generation and use of the data
568 structures for the wide character tables.
570 * Plural handling in gettext implemented by Ulrich Drepper.
572 * The utmp daemon has been removed.
574 * The port to MIPS-Linux has been finished by Andreas Jaeger.
576 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
577 and Yutaka Niibe.
579 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
581 * POSIX barriers implemented by Kaz Kylheku.
583 * POSIX spawn function family implemented by Ulrich Drepper.
585 * POSIX spinlocks are now available.
587 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
589 * the configure option --enable-kernel=X.Y.Z allows to strip out
590 compatibility for kernel versions before X.Y.Z. This is currently only
591 implemented for Linux.
593 * the sockaddr_in6 structure changed. The IPv6 working group added a new
594 field sin6_scope_id. This means that all programs using IPv6 should be
595 recompiled. Don't expect binary compatibility with previous glibc
596 versions.
598 * various conversion modules for IBM character sets contributed by
599 Masahide Washizawa.
601 * IA-64 port by Jes Sorensen and HJ Lu.
603 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
604 Compiling the GNU C Library for Linux/ia64
605 ******************************************
607 Please refer to the file INSTALL in the same directory as you found
608 this file for general information about configuring and compiling
609 glibc.
611 For general inquiries about glibc under Linux/ia64 please use the
612 following mailing list linux-ia64@linuxia64.org or one of the relevant
613 glibc mailing lists.
615 Recommended Tools for Compilation
616 =================================
618 In order for glibc-2.2 to build correctly on the ia64 you need at
619 least the following versions of the GNU tools (the :
621 * The Cygnus toolchain snapshot for the ia64 as of August 4
622 including the provided set of patches. It is however recommend
623 you use the October 24 toolchain snapshot or a more recent version.
625 OR alternatively you can try the following (the Cygnus toolchain is
626 the recommended solution):
628 * GCC and binutils, GAS and GNU LD out of CVS from
629 sources.redhat.com as of August 28, 2000 or later. The CVS tree
630 may require special patches to work properly on the ia64.
632 Configuring and compiling GNU Libc for Linux/ia64
633 =================================================
635 The library requires Linux kernel version 2.4.0-test4-000728 or
636 later to funtion properly. Besides that it support for debug libraries
637 is currently untested. Hence the following options
638 are required for configuring the library:
640 --disable-debug --enable-kernel=2.4.0
642 It is also important that you make sure the library picks up the
643 appropriate kernel header files, if you do not have recent enough
644 kernel headers in /usr/src/linux/include, you should use the
645 --with-headers=<path> option to specify the location.
647 As an example I personally use the following options to configure
648 the library:
650 --disable-debug
651 --disable-cvs
652 --enable-kernel=2.4.0
653 --host=ia64-linux
654 --enable-add-ons=yes
655 --prefix=/usr
656 --with-headers=/home/jes/linux/include
659 Good luck
661 Jes Sorensen <jes@linuxcare.com>,
662 November 14th, 2000
663 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
664 \f
665 Version 2.1.3
667 * bug fixes
669 \f
670 Version 2.1.2
672 * bug fixes
674 \f
675 Version 2.1.1
677 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
679 * New xdr functions are added; some rpc functions are now 64bit clean.
681 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
683 * Fixed known incompatibilities with glibc 2.0.
685 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
687 * Optimized a number of functions (especially the ELF dynamic loader).
689 * Update timezone data files.
691 * lots of charmaps corrections
693 * some new locale definitions and charmaps
695 \f
696 Version 2.1
698 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
699 conform to POSIX member type requirements. Symbol versions have been
700 adjusted as needed within the library, and for direct use by applications,
701 but there is potential for problems if third-party libraries use
702 struct timeval as part of their interface. This does not present
703 a problem for X and other "essential" system libraries.
705 * An additional locale model to support C++ Standard Library locale
706 model and probably more was implemented by Ulrich Drepper.
708 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
709 symbol level.
711 * Miles Bader provided the `argp' function family to support hierachical
712 command line argument parsing, layered on top of getopt.
714 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
716 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
717 numbers.
719 * scanf recognizes the %a and %A format for scanning floating point numbers.
721 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
722 information and interfaces for the available integer types.
724 * about 130 new math functions were added to implement the ISO C9x math
725 library.
727 * the new header <complex.h> contains definitions of the complex math
728 functions from ISO C 9X.
730 * the new header <tgmath.h> defines generic macros to use complex or
731 real valued functions.
733 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
735 * Andreas Jaeger provided a test suite for the math library.
737 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
739 * Ulrich Drepper added character set conversion functions (iconv).
741 * Optimized string functions have been added.
743 * The localedata addon is now part of glibc.
745 * An implementation of profiling shared libraries was added by Ulrich Drepper.
747 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
748 daemon for NSS (nscd).
750 Missing a better place here are some numbers on improvements. Under
751 Linux 2.1.125 un-tar-ing the kernel sources takes
753 user system wall
755 using local files 12.19s 6.88s 22.91s
757 using NIS 13.92s 8.91s 26.34s
759 using NIS & nscd 10.37s 7.34s 25.30s
761 using NIS+ 27.57s 30.37s 640.46s
763 using NIS+ & nscd 10.25s 7.83s 26.51s
765 using NIS & old nscd [1] 13.83s 8.32s 29.60s
767 Keep in mind that non-namelookup related operations dominate above times.
768 It was just a common complain that using NIS+ unpacking the kernel is
769 horribly slow.
771 [1] The old nscd implementation is not available anymore since it was
772 distributed with glibc up to version 2.0.98 and thus is now replaced.
774 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
776 * Mark Kettenis provided a Hesiod NSS module.
778 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
779 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
781 * rcmd can now handle netgroups (Dick Streefland).
783 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
784 Bambrough.
786 * Support for the IPv6 protocol has been added to the socket API, as per the
787 latest draft standards.
789 * Support for Linux 2.2 has been added.
791 * Interface changes relative to the latest 2.0.x release:
792 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
793 addseverity NEW: Unix98
794 alphasort64 NEW: LFS
795 argp_err_exit_status NEW: argp, GNU ext
796 argp_error NEW: argp, GNU ext
797 argp_failure NEW: argp, GNU ext
798 argp_help NEW: argp, GNU ext
799 argp_parse NEW: argp, GNU ext
800 argp_program_bug_address NEW: argp, GNU ext
801 argp_program_version NEW: argp, GNU ext
802 argp_program_version_hook NEW: argp, GNU ext
803 argp_state_help NEW: argp, GNU ext
804 argp_usage NEW: argp, GNU ext
805 authdes_create NEW: Secure RPC
806 authdes_getucred NEW: Secure RPC
807 authdes_pk_create NEW: Secure RPC
808 backtrace NEW: GNU ext.
809 backtrace_symbols NEW: GNU ext.
810 backtrace_symbols_fd NEW: GNU ext.
811 cacos NEW: ISO C 9x
812 cacosf NEW: ISO C 9x
813 cacosh NEW: ISO C 9x
814 cacoshf NEW: ISO C 9x
815 cacoshl NEW: ISO C 9x
816 cacosl NEW: ISO C 9x
817 capget NEW: kernel
818 capset NEW: kernel
819 carg NEW: ISO C 9x
820 cargf NEW: ISO C 9x
821 cargl NEW: ISO C 9x
822 casin NEW: ISO C 9x
823 casinf NEW: ISO C 9x
824 casinh NEW: ISO C 9x
825 casinhf NEW: ISO C 9x
826 casinhl NEW: ISO C 9x
827 casinl NEW: ISO C 9x
828 catan NEW: ISO C 9x
829 catanf NEW: ISO C 9x
830 catanh NEW: ISO C 9x
831 catanhf NEW: ISO C 9x
832 catanhl NEW: ISO C 9x
833 catanl NEW: ISO C 9x
834 cbc_crypt NEW: Secure RPC
835 ccos NEW: ISO C 9x
836 ccosf NEW: ISO C 9x
837 ccosh NEW: ISO C 9x
838 ccoshf NEW: ISO C 9x
839 ccoshl NEW: ISO C 9x
840 ccosl NEW: ISO C 9x
841 cexp NEW: ISO C 9x
842 cexpf NEW: ISO C 9x
843 cexpl NEW: ISO C 9x
844 cimag NEW: ISO C 9x
845 cimagf NEW: ISO C 9x
846 cimagl NEW: ISO C 9x
847 clearerr_locked REMOVED
848 clntunix_create NEW: sunrpc ext
849 clog NEW: ISO C 9x
850 clog10 NEW: ISO C 9x
851 clog10f NEW: ISO C 9x
852 clog10l NEW: ISO C 9x
853 clogf NEW: ISO C 9x
854 clogl NEW: ISO C 9x
855 conj NEW: ISO C 9x
856 conjf NEW: ISO C 9x
857 conjl NEW: ISO C 9x
858 cpow NEW: ISO C 9x
859 cpowf NEW: ISO C 9x
860 cpowl NEW: ISO C 9x
861 cproj NEW: ISO C 9x
862 cprojf NEW: ISO C 9x
863 cprojl NEW: ISO C 9x
864 creal NEW: ISO C 9x
865 crealf NEW: ISO C 9x
866 creall NEW: ISO C 9x
867 creat64 NEW: LFS
868 csin NEW: ISO C 9x
869 csinf NEW: ISO C 9x
870 csinh NEW: ISO C 9x
871 csinhf NEW: ISO C 9x
872 csinhl NEW: ISO C 9x
873 csinl NEW: ISO C 9x
874 csqrt NEW: ISO C 9x
875 csqrtf NEW: ISO C 9x
876 csqrtl NEW: ISO C 9x
877 ctan NEW: ISO C 9x
878 ctanf NEW: ISO C 9x
879 ctanh NEW: ISO C 9x
880 ctanhf NEW: ISO C 9x
881 ctanhl NEW: ISO C 9x
882 ctanl NEW: ISO C 9x
883 des_setparity NEW: Secure RPC
884 ecb_crypt NEW: Secure RPC
885 endutxent NEW: Unix98
886 exp10 NEW: ISO C 9x
887 exp10f NEW: ISO C 9x
888 exp10l NEW: ISO C 9x
889 exp2 NEW: ISO C 9x
890 exp2f NEW: ISO C 9x
891 exp2l NEW: ISO C 9x
892 fattach NEW: STREAMS
893 fdetach NEW: STREAMS
894 fdim NEW: ISO C 9x
895 fdimf NEW: ISO C 9x
896 fdiml NEW: ISO C 9x
897 feclearexcept NEW: ISO C 9x
898 fegetenv NEW: ISO C 9x
899 fegetexceptflag NEW: ISO C 9x
900 fegetround NEW: ISO C 9x
901 feholdexcept NEW: ISO C 9x
902 feof_locked REMOVED
903 feraiseexcept NEW: ISO C 9x
904 ferror_locked REMOVED
905 fesetenv NEW: ISO C 9x
906 fesetexceptflag NEW: ISO C 9x
907 fesetround NEW: ISO C 9x
908 fetestexcept NEW: ISO C 9x
909 feupdateenv NEW: ISO C 9x
910 fflush_locked REMOVED
911 ffsl NEW: GNU ext.
912 ffsll NEW: GNU ext.
913 fgetpos64 NEW: LFS
914 fgets_unlocked NEW: GNU ext.
915 fileno_locked REMOVED
916 fma NEW: ISO C 9x
917 fmaf NEW: ISO C 9x
918 fmal NEW: ISO C 9x
919 fmax NEW: ISO C 9x
920 fmaxf NEW: ISO C 9x
921 fmaxl NEW: ISO C 9x
922 fmin NEW: ISO C 9x
923 fminf NEW: ISO C 9x
924 fminl NEW: ISO C 9x
925 fmtmsg NEW: Unix98
926 fopen64 NEW: LFS
927 fputc_locked REMOVED
928 fputs_unlocked NEW: GNU ext.
929 fread_unlocked NEW: GNU ext.
930 freopen64 NEW: LFS
931 fseeko NEW: Unix98
932 fsetpos64 NEW: LFS
933 fstatfs64 NEW: LFS
934 fstatvfs NEW: Unix98
935 fstatvfs64 NEW: LFS
936 ftello NEW: Unix98
937 ftello64 NEW: LFS
938 ftruncate64 NEW: LFS
939 ftw64 NEW: LFS
940 fwrite_unlocked NEW: GNU ext.
941 gai_strerror NEW: IPv6
942 gamma_r REMOVED
943 gammaf_r REMOVED
944 gammal_r REMOVED
945 getchar_locked REMOVED
946 getdate NEW: Unix98
947 getdate_err NEW: Unix98
948 getdate_r NEW: GNU ext.
949 getmsg NEW: STREAMS
950 getnameinfo NEW: IPv6
951 getnetname NEW: Secure RPC
952 getpmsg NEW: STREAMS
953 getpt NEW: Unix98 PTY
954 getrlimit64 NEW: LFS
955 getutxent NEW: Unix98
956 getutxid NEW: Unix98
957 getutxline NEW: Unix98
958 glob64 NEW: GNU ext.
959 globfree64 NEW: GNU ext.
960 gnu_get_libc_release NEW: GNU ext.
961 gnu_get_libc_version NEW: GNU ext.
962 grantpt NEW: Unix98 PTY
963 host2netname NEW: Secure RPC
964 iconv NEW: iconv
965 iconv_close NEW: iconv
966 iconv_open NEW: iconv
967 if_freenameindex NEW: IPv6
968 if_indextoname NEW: IPv6
969 if_nameindex NEW: IPv6
970 if_nametoindex NEW: IPv6
971 in6addr_any NEW: IPv6
972 in6addr_loopback NEW: IPv6
973 inet6_isipv4mapped NEW: IPv6
974 isastream NEW: STREAMS
975 iswblank NEW: GNU ext.
976 key_decryptsession NEW: Secure RPC
977 key_decryptsession_pk NEW: Secure RPC
978 key_encryptsession NEW: Secure RPC
979 key_encryptsession_pk NEW: Secure RPC
980 key_gendes NEW: Secure RPC
981 key_get_conv NEW: Secure RPC
982 key_secretkey_is_set NEW: Secure RPC
983 key_setnet NEW: Secure RPC
984 key_setsecret NEW: Secure RPC
985 llrint NEW: ISO C 9x
986 llrintf NEW: ISO C 9x
987 llrintl NEW: ISO C 9x
988 llround NEW: ISO C 9x
989 llroundf NEW: ISO C 9x
990 llroundl NEW: ISO C 9x
991 log2 NEW: ISO C 9x
992 log2f NEW: ISO C 9x
993 log2l NEW: ISO C 9x
994 lrint NEW: ISO C 9x
995 lrintf NEW: ISO C 9x
996 lrintl NEW: ISO C 9x
997 lround NEW: ISO C 9x
998 lroundf NEW: ISO C 9x
999 lroundl NEW: ISO C 9x
1000 lseek64 NEW: LFS
1001 makecontext NEW: Unix98
1002 mempcpy NEW: GNU ext.
1003 mmap64 NEW: LFS
1004 moncontrol REMOVED
1005 modify_ldt NEW: kernel
1006 nan NEW: ISO C 9x
1007 nanf NEW: ISO C 9x
1008 nanl NEW: ISO C 9x
1009 nearbyint NEW: ISO C 9x
1010 nearbyintf NEW: ISO C 9x
1011 nearbyintl NEW: ISO C 9x
1012 netname2host NEW: Secure RPC
1013 netname2user NEW: Secure RPC
1014 nexttoward NEW: ISO C 9x
1015 nexttowardf NEW: ISO C 9x
1016 nexttowardl NEW: ISO C 9x
1017 nftw NEW: Unix98
1018 nftw64 NEW: LFS
1019 open64 NEW: LFS
1020 passwd2des NEW: Secure RPC
1021 pow10 NEW: GNU ext.
1022 pow10f NEW: GNU ext.
1023 pow10l NEW: GNU ext.
1024 pread NEW: Unix98
1025 pread64 NEW: LFS
1026 printf_size NEW: GNU ext.
1027 printf_size_info NEW: GNU ext.
1028 profil_counter REMOVED
1029 pthread_mutexattr_getkind_np REPLACED
1030 pthread_mutexattr_setkind_np REPLACED
1031 ptsname NEW: Unix98 PTY
1032 ptsname_r NEW: Unix98 PTY
1033 putc_locked REMOVED
1034 putchar_locked REMOVED
1035 putgrent NEW: GNU ext.
1036 putmsg NEW: STREAMS
1037 putpmsg NEW: STREAMS
1038 pututxline NEW: Unix98
1039 pwrite NEW: Unix98
1040 pwrite64 NEW: LFS
1041 readdir64 NEW: LFS
1042 readdir64_r NEW: LFS
1043 remquo NEW: ISO C 9x
1044 remquof NEW: ISO C 9x
1045 remquol NEW: ISO C 9x
1046 round NEW: ISO C 9x
1047 roundf NEW: ISO C 9x
1048 roundl NEW: ISO C 9x
1049 rtime NEW: GNU ext.
1050 scalbln NEW: ISO C 9x
1051 scalblnf NEW: ISO C 9x
1052 scalblnl NEW: ISO C 9x
1053 scandir64 NEW: LFS
1054 sendfile NEW: kernel
1055 setcontext NEW: Unix98
1056 setrlimit64 NEW: LFS
1057 setutxent NEW: Unix98
1058 sighold NEW: Unix98
1059 sigignore NEW: Unix98
1060 sigqueue NEW: POSIX.1b
1061 sigrelse NEW: Unix98
1062 sigset NEW: POSIX.1b
1063 sigtimedwait NEW: POSIX.1b
1064 sigwaitinfo NEW: POSIX.1b
1065 sincos NEW: GNU ext.
1066 sincosf NEW: GNU ext.
1067 sincosl NEW: GNU ext.
1068 statfs64 NEW: LFS
1069 statvfs NEW: Unix98
1070 statvfs64 NEW: LFS
1071 strcasestr NEW: GNU ext.
1072 strtoimax NEW: ISO C 9x
1073 strtoumax NEW: ISO C 9x
1074 strverscmp NEW: GNU ext.
1075 svcauthdes_stats NEW: Secure RPC
1076 svcunix_create NEW: sunrpc etx
1077 svcunixfd_create NEW: sunrpc ext
1078 swapcontext NEW: Unix98
1079 tcgetsid NEW: Unix98 PTY
1080 tdestroy NEW: GNU ext.
1081 tgamma NEW: ISO C 9x
1082 tgammaf NEW: ISO C 9x
1083 tgammal NEW: ISO C 9x
1084 tmpfile64 NEW: LFS
1085 trunc NEW: ISO C 9x
1086 truncate64 NEW: LFS
1087 truncf NEW: ISO C 9x
1088 truncl NEW: ISO C 9x
1089 umount2 NEW: kernel
1090 unlockpt NEW: Unix98 PTY
1091 updwtmpx NEW: Unix98
1092 user2netname NEW: Secure RPC
1093 utmpxname NEW: Unix98
1094 versionsort NEW: GNU ext.
1095 versionsort64 NEW: GNU ext.
1096 waitid NEW: Unix98
1097 wcscasecmp NEW: GNU ext.
1098 wcsncasecmp NEW: GNU ext.
1099 wcsnlen NEW: GNU ext.
1100 wcstoimax NEW: ISO C 9x
1101 wcstoll NEW: ISO C 9x
1102 wcstoull NEW: ISO C 9x
1103 wcstoumax NEW: ISO C 9x
1104 wcswcs NEW: Unix98
1105 wordexp NEW: POSIX.2
1106 wordfree NEW: POSIX.2
1107 write_profiling REMOVED
1108 xdecrypt NEW: Secure RPC
1109 xdr_authdes_cred NEW: Secure RPC
1110 xdr_authdes_verf NEW: Secure RPC
1111 xdr_cryptkeyarg NEW: Secure RPC
1112 xdr_cryptkeyarg2 NEW: Secure RPC
1113 xdr_cryptkeyres NEW: Secure RPC
1114 xdr_getcredres NEW: Secure RPC
1115 xdr_key_netstarg NEW: Secure RPC
1116 xdr_key_netstres NEW: Secure RPC
1117 xdr_keybuf NEW: Secure RPC
1118 xdr_keystatus NEW: Secure RPC
1119 xdr_netnamestr NEW: Secure RPC
1120 xdr_sizeof NEW: Secure RPC
1121 xdr_unixcred NEW: sunrpc ext
1122 xencrypt NEW: Secure RPC
1123 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1124 \f
1125 Version 2.0.6
1127 * more bug fixes
1129 \f
1130 Version 2.0.5
1132 * more bug fixes
1134 * inet_ntoa is thread-safe
1136 * updwtmp is moved from libutil to libc
1138 * rewrite of cbrt function
1140 * update of timezone data
1141 \f
1142 Version 2.0.4
1144 * more bug fixes
1145 \f
1146 Version 2.0.3
1148 * more bug fixes
1149 \f
1150 Version 2.0.2
1152 * more bug fixes
1154 * add atoll function
1156 * fix complex problems in Berkeley DB code
1158 * fix math functions
1159 \f
1160 Version 2.0.1
1162 * fixed lots of header problems (especially Linux/GNU specific)
1164 * dynamic loader preserves all registers
1166 * Roland McGrath provided support for handling of auxiliary objects in
1167 the ELF dynamic loader.
1169 * support for parallel builds is improved
1170 \f
1171 Version 2.0
1173 * GNU extensions are no longer declared by default. To enable them you
1174 must define the macro `_GNU_SOURCE' in your program or compile with
1175 `-D_GNU_SOURCE'.
1177 * The library has changed from using GNU ld symbol aliases to using weak
1178 symbols where available. The ELF object file format supports weak
1179 symbols; GNU ld also supports weak symbols in the a.out format. (There
1180 is also now support for other GNU ld extensions in ELF. Use the
1181 `--with-elf' option to configure to indicate you have ELF, and
1182 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1183 of many files which contained only symbol aliases, reducing the size of
1184 the source and the compiled library; many other files were renamed to
1185 less cryptic names previously occupied by the symbol alias files.
1186 There is a new header file <elf.h> for programs which operate on
1187 files in the ELF format.
1189 * Converted to Autoconf version 2, so `configure' has more options.
1190 Run `configure --help' to see the details.
1192 * The library can now be configured to build profiling, highly-optimized
1193 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1194 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1195 `configure' enable building these extra libraries. The shared library is
1196 built by default when using both ELF and GNU ld. When shared libraries
1197 are enabled, the new library `-ldl' is available for arbitrary run-time
1198 loading of shared objects; its interface is defined in <dlfcn.h>. The
1199 new header file <link.h> gives access to the internals of the run-time
1200 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1201 application of same name on other systems and it provides information
1202 about dynamically linked binaries.
1204 * The C library now provides the run-time support code for profiling
1205 executables compiled with `-pg'. Programs can control the profiling code
1206 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1207 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1208 the support for this file format was contributed by David Mosberger-Tang.
1210 * The math code has been replaced with a math library based on fdlibm from
1211 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1212 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1213 functions. The math functions now reside in a separate library, so
1214 programs using them will need to use `-lm' their linking commands.
1216 * John C. Bowman contributed optimized ix87 assembler inline functions.
1218 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1219 mechanism similar to that found in Solaris 2. This is now used for the
1220 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1221 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1222 file controls what services are used for each individual database. This
1223 works by loading shared libraries with names specified in `nsswitch.conf',
1224 so service modules can be changed or added at any time without even
1225 relinking any program. Currently there are the file, db, and NIS based
1226 NSS services available.
1228 * The new functions `strtoq' and `strtouq' parse integer values from
1229 strings, like `strtol' and `strtoul', but they return `long long int' and
1230 `unsigned long long int' values, respectively (64-bit quantities).
1232 * The new functions `strtof' and `strtold' parse floating-point values from
1233 strings, like `strtod', but they return `float' and `long double' values,
1234 respectively (on some machines `double' and `long double' are the same).
1236 * Ulrich Drepper has contributed new implementations of the floating-point
1237 printing and reading code used in the `printf' family of functions and
1238 `strtod', `strtof', and `strtold'. These new functions are perfectly
1239 accurate, and much faster than the old ones.
1241 * The implementation of the POSIX locale model was completely rewritten by
1242 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1243 to compile the POSIX locale definition.
1245 * The former dummy implementations of the strcoll and strxfrm function are
1246 now replaced by fully functional code contributed by Ulrich Drepper. The
1247 collation information comes from the POSIX locale definitions.
1249 * The new header <langinfo.h> defines an interface for accessing
1250 various locale-dependent data (using the locale chosen with `setlocale').
1252 * Ulrich Drepper has contributed a new suite of functions for operation on
1253 wide-character and multibyte-character strings, in <wchar.h>;
1254 and classification and case conversion of wide characters, in <wctype.h>.
1255 These new functions are conforming to the ISO C, Amendement 1 specification.
1257 * There is now a second implementation of the standard I/O library available.
1258 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1259 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1261 * You can now use positional parameter specifications in format strings
1262 for the `printf' and `scanf' families of functions. For example,
1263 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1264 ``Number 6, Mr Jones''. This is mainly useful when providing different
1265 format strings for different languages, whose grammars may dictate
1266 different orderings of the values being printed. To support this
1267 feature, the interface for `register_printf_handler' has changed; see
1268 the header file <printf.h> for details.
1270 * The `printf' and `scanf' families of functions now understand a new
1271 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1272 to group numbers as indicated by the locale; for `scanf' and friends, this
1273 says to accept as valid only a number with all the proper grouping
1274 separators in the right places. In the default "C" locale, numbers are
1275 not grouped; but locales for specific countries will define the usual
1276 conventions (i.e. separate thousands with `,' in the US locale).
1278 * The pgrp functions have been regularized, slightly incompatibly but much
1279 less confusingly. The core functions are now `getpgid' and `setpgid',
1280 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1281 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1282 provided for compatibility. There is no longer an incompatible `getpgrp'
1283 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1285 * The new header file <fts.h> and suite of functions simplify programs that
1286 operate on directory trees. This code comes from 4.4 BSD.
1288 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1289 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1290 NSS scheme used in glibc.
1292 * There is a new malloc debugging hook `__memalign_hook'.
1294 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1295 `unsigned int' in <sys/types.h>. These are for compatibility only and
1296 their use is discouraged.
1298 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1299 done differently, so that it works even without GNU ld.
1301 * New function `euidaccess' checks allowed access to a file like `access',
1302 but using the effective IDs instead of the real IDs.
1304 * The time zone data files have been updated for the latest and greatest
1305 local time conventions of the countries of the world.
1307 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1308 see <dirent.h>.
1310 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1311 for formatting floating-point numbers. They are provided only for
1312 compatibility; new programs should use `sprintf' instead. There are
1313 also equivalent function for the `long double' floating-point type and
1314 all functions also exist in a reentrant form.
1316 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1317 functions for maintaining the login-record files (primarily of use to
1318 system programs such as `login'), and convenient functions for
1319 allocating and initializing a pseudo-terminal (pty) device.
1321 * Ulrich Drepper has contributed new support for System V style
1322 shared memory and IPC on systems that support it.
1324 * Ulrich Drepper has contributed several miscellaneous new functions found
1325 in System V: The `hsearch' family of functions provide an effective
1326 implementation of hash tables; `a64l' and `l64a' provide a very simple
1327 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1328 number generator.
1330 * Ulrich Drepper has contributed new reentrant counterparts for the
1331 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1333 * Ulrich Drepper has contributed new, highly-optimized versions of several
1334 string functions for the i486/Pentium family of processors.
1336 * Ulrich Drepper has updated the Linux-specific code, based largely
1337 on work done in Hongjiu Lu's version of GNU libc for Linux.
1338 The GNU library now supports Linux versions 2.0.10 and later,
1339 using the ELF object file format (i[3456]86-*-linux).
1341 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1343 * David Mosberger-Tang and Richard Henderson have ported the C library
1344 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1345 dynamic linking support for ELF/Alpha.
1347 * Richard Henderson contributed several Alpha optimized assembler function
1348 for arithmetic and string handling.
1350 * Ulrich Drepper has contributed a new set of message catalog functions to
1351 support multiple languages using the <libintl.h> interface, for use with
1352 his new package GNU gettext. Translation volunteers have contributed
1353 catalogs of the library's messages in Spanish, German, and Korean.
1355 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1356 program and the `catgets' function for reading the catalog files it
1357 creates. (The <libintl.h> interface is preferred; we include the
1358 <nl_types.h> interface using `catgets' only for source compatibility with
1359 programs already written to use it.)
1361 * New header file <values.h> gives SVID-compatible names for <limits.h>
1362 constants.
1364 * Various new macros, declarations, and small header files for compatibility
1365 with 4.4 BSD.
1367 * New function `group_member' is a convenient way to check if a process has
1368 a given effective group ID.
1370 * When using GCC 2.7 and later, the socket functions are now declared in a
1371 special way so that passing an argument of type `struct sockaddr_in *',
1372 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1373 `struct sockaddr *' type, does not generate a type-clash warning.
1375 * New function `error' declared in header file <error.h> is a convenient
1376 function for printing error messages and optionally exiting; this is the
1377 canonical function used in GNU programs. The new functions `err', `warn',
1378 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1379 doing the same thing.
1381 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1382 POSIX.2 `glob' function to do ~ and {...} expansion.
1384 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1385 `clearenv' which is used in POSIX.9 is also available.
1387 * New function `getsid' returns session ID number on systems that support it.
1389 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1390 files <db.h> and <mpool.h> provide a rich set of functions for several
1391 types of simple databases stored in memory and in files, and <ndbm.h> is
1392 an old `ndbm'-compatible interface using the `db' functions. Link with
1393 `-ldb' to get these functions.
1395 * New macro `strdupa' copies a string like `strdup', but uses local stack
1396 space from `alloca' instead of dynamic heap space from `malloc'.
1398 * New function `strnlen' is like `strlen' but searches only a given maximum
1399 number of characters for the null terminator. `stpncpy', `strndup' and
1400 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1401 function.
1403 * New function `statfs' in header <sys/statfs.h>.
1405 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1406 provide convenient functions for operating on blocks of null-terminated
1407 strings.
1409 * A new suite of functions in <utmp.h> handle all the details of reading
1410 and writing the utmp file.
1412 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1413 Thorsten Kukuk.
1415 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1416 completely POSIX compliant and also implemented the extended functionality
1417 to handle alternate digit representation and alternate era date formats.
1419 * Ulrich Drepper provided an implementation of the `strptime' function
1420 defined in XPG4.2 which transforms a string into a `struct tm' value.
1422 * Paul Eggert provided the tzselect shell script as part of the timezone
1423 code. The shell script makes it easy to select the correct timezone
1424 specification.
1426 * The implementation of the malloc family of functions is completely replaced
1427 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1428 The implementation uses the mmap function (if available) and it is
1429 optimized for the use in multi threaded programs.
1431 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1432 functions. This new functionality is usable by specifying a special
1433 salt string and it is compatible with implementation on *BSD systems.
1435 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1436 `getsubopt' to handle second level command line options, `bsd_signal'
1437 to access BSD style `signal' functionality, the obsolete `regexp' style
1438 expression matcher.
1440 * the `lchown' function is available on system which support this
1441 functionality.
1443 * The implementation of the shadow password handling function was contributed
1444 by Ulrich Drepper.
1446 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1448 * POSIX.1g support was added. The <sys/select.h> header is available,
1449 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1450 implementation of `getaddrinfo'.
1451 \f
1452 Version 1.09
1454 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1456 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1457 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1459 * The new function `daemon' from 4.4 BSD is useful for server programs that
1460 want to put themselves in the background.
1462 * Joel Sherrill has contributed support for several standalone boards that
1463 run without an operating system.
1465 * `printf', `scanf' and friends now accept a `q' type modifier for long
1466 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1468 * All of the code taken from BSD (notably most of the math and networking
1469 routines) has been updated from the BSD 4.4-Lite release.
1471 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1473 * The new functions `getdomainname' and `setdomainname' fetch or change the
1474 YP/NIS domain name. These are system calls which exist on systems which
1475 have YP (aka NIS).
1477 * The time zone data files have been updated for the latest international
1478 conventions.
1480 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1481 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1482 \f
1483 Version 1.08
1485 * The C library now includes support for Sun RPC, from Sun's free
1486 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1487 are included. (There is still no support for YP.)
1489 * Tom Quinn has contributed a port of the C library to SGI machines running
1490 Irix 4 (mips-sgi-irix4).
1492 * The new `lockf' function is a simplified interface to the locking
1493 facilities of `fcntl', included for compatibility.
1495 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1497 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1499 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1500 compatibility.
1502 * The error message printed by `assert' for a failed assertion now includes
1503 the name of the program (if using GNU ld) and the name of the calling
1504 function (with versions of GCC that support this).
1506 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1508 * The library now includes the <sys/mman.h> header file and memory
1509 management functions `mmap', `munmap', `mprotect', `msync', and
1510 `madvise', on systems that support those facilities.
1512 * The interface for `mcheck' has changed slightly: the function called to
1513 abort the program when an allocation inconsistency is detected now takes
1514 an argument that indicates the type of failure. The new function
1515 `mprobe' lets you request a consistency check for a particular block at
1516 any time (checks are normally done only when you call `free' or `realloc'
1517 on a block).
1519 * It is now possible to easily cross-compile the C library, building on one
1520 system a library to run on another machine and/or operating system. All
1521 you need to do is set the variable `HOST_CC' in `configparms' to the
1522 native compiler for programs to run on the machine you are building on (a
1523 few generator programs are used on Unix systems); set `CC' to the
1524 cross-compiler.
1526 * The new function `fexecve' (only implemented on the GNU system) executes
1527 a program file given a file descriptor already open on the file.
1528 \f
1529 Version 1.07
1531 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1532 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1534 * You can set the variable `libprefix' in `configparms' to specify a prefix
1535 to be prepended to installed library files; this makes it easy to install
1536 the GNU C library to be linked as `-lgnuc' or whatever.
1538 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1539 copies a limited number of characters from a string, and returns the
1540 address of the last character written.
1542 * You no longer need to check for whether the installed `stddef.h' is
1543 compatible with the GNU C library. configure now checks for you.
1545 * You can now define a per-stream `fileno' function to convert the
1546 stream's cookie into an integral file descriptor.
1548 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1549 allocates zero bytes of storage, and returns a unique pointer which
1550 you can pass to `realloc' or `free'. The behavior is undefined if
1551 you dereference this pointer.
1553 * The C library now runs on Sony NEWS m68k machines running either
1554 NewsOS 3 or NewsOS 4.
1556 * The new `syscall' function is a system-dependent primitive function
1557 for invoking system calls. It has the canonical behavior on Unix
1558 systems, including unreliable return values for some calls (such as
1559 `pipe', `fork' and `getppid').
1561 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1562 to `EAGAIN', which is the preferred name. On systems whose kernels
1563 use two distinct codes, the C library now translates EWOULDBLOCK to
1564 EAGAIN in every system call function.
1565 \f
1566 Version 1.06
1568 * The GNU C Library Reference Manual is now distributed with the library.
1569 `make dvi' will produce a DVI file of the printed manual.
1570 `make info' will produce Info files that you can read on line using C-h i
1571 in Emacs or the `info' program.
1572 Please send comments on the manual to bug-glibc-manual@gnu.org.
1574 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1576 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1578 * Jason Merrill has contributed a port to the Sequent Symmetry running
1579 Dynix version 3 (i386-sequent-dynix).
1581 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1582 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1584 * New function `memory_warnings' lets you arrange to get warnings when
1585 malloc is running out of memory to allocate, like Emacs gives you.
1587 * The C library now contains the relocating allocator used in Emacs 19 for
1588 its editing buffers. This allocator (ralloc) minimizes allocation
1589 overhead and fragmentation by moving allocated regions around whenever it
1590 needs to. You always refer to a ralloc'd region with a "handle" (a
1591 pointer to a pointer--an object of type `void **').
1593 * There is a new `printf' format: `%m' gives you the string corresponding
1594 to the error code in `errno'.
1596 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1597 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1598 pass, the `a' modifier says to fill in a `char **' you pass with a
1599 malloc'd string.
1601 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1602 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1603 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1605 * `mkstemp' is a traditional Unix function to atomically create and open a
1606 uniquely-named temporary file.
1607 \f
1608 Version 1.05
1610 * The standard location for the file that says what the local timezone is
1611 has changed again. It is now `/usr/local/etc/localtime' (or more
1612 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1614 * The distribution no longer contains any files with names longer than 14
1615 characters.
1617 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1618 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1620 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1621 \f
1622 Version 1.04
1624 * The configuration process has changed quite a bit. The `configure'
1625 script is now used just like the configuration scripts for other GNU
1626 packages. The `sysdeps' directory hierarchy is much rearranged.
1627 The file `INSTALL' explains the new scheme in detail.
1629 * The header files no longer need to be processed into ANSI C and
1630 traditional C versions. There is just one set of files to install, and
1631 it will work with ANSI or old C compilers (including `gcc -traditional').
1633 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1634 MIPS DECStation running Ultrix 4.
1636 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1637 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1638 made itself into a shared library.
1640 * Yet further improved support for the i386, running 4.3 BSD-like systems
1641 (such as Mach 3 with the Unix single-server), or System V.
1643 * New function `strncasecmp' to do case-insensitive string comparison
1644 with limited length.
1646 * New function `strsep' is a reentrant alternative to `strtok'.
1648 * New functions `scandir' and `alphasort' for searching directories.
1650 * New function `setenv' is a better interface to `putenv'.
1652 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1653 function for traversing a directory tree.
1655 * The GNU obstack package is now also part of the C library.
1656 The new function `open_obstack_stream' creates a stdio stream that
1657 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1658 formatted output directly to an obstack.
1660 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1661 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1663 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1665 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1666 things to your strings.
1668 * There are some new test programs: test-fseek, testmb, and testrand.
1670 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1671 These ports are not finished, but are a good starting place for really
1672 supporting those systems.
1674 * `/etc/localtime' is now the standard location for the file that says what
1675 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1676 This follows the general principle that `/etc' is the place for all local
1677 configuration files.
1679 * The C library header files now use `extern "C"' when used by the C++
1680 compiler, so the C library should now work with C++ code.
1682 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1683 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
1684 in <strings.h>.)
1686 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1687 function which uses the `merge sort' algorithm, and is said to be
1688 significantly faster than the old GNU `qsort' function. Merge sort is
1689 now the standard `qsort' function. The new algorithm can require a lot
1690 of temporary storage; so, the old sorting function is called when the
1691 required storage is not available.
1693 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1694 provides the Unix `crypt' function, plus some other entry points.
1696 * The code and header files taken from 4.4 BSD have been updated with the
1697 latest files released from Berkeley.
1698 \f
1699 ----------------------------------------------------------------------
1700 Copyright information:
1702 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1703 Free Software Foundation, Inc.
1705 Permission is granted to anyone to make or distribute verbatim copies
1706 of this document as received, in any medium, provided that the
1707 copyright notice and this permission notice are preserved,
1708 thus giving the recipient permission to redistribute in turn.
1710 Permission is granted to distribute modified versions
1711 of this document, or of portions of it,
1712 under the above conditions, provided also that they
1713 carry prominent notices stating who last changed them.
1714 \f
1715 Local variables:
1716 version-control: never
1717 End: