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1 GNU C Library NEWS -- history of user-visible changes. 2009-4-3
2 Copyright (C) 1992-2008, 2009 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sources.redhat.com/bugzilla/>
6 using `glibc' in the "product" field.
7 \f
8 Version 2.10
10 * New interfaces: preadv, preadv64, pwritev, pwritev64
11 Implemented by Ulrich Drepper.
13 * New Linux interfaces: accept4, fallocate, fallocate64.
14 Implemented by Ulrich Drepper.
16 * Correct declarations of string function when used in C++ code. This
17 could lead to compile error for invalid C++ code.
19 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
20 now in POSIX.
22 * New POSIX 2008 interface: psiginfo
23 Implemented by Ulrich Drepper.
25 * New ISO C++1x interfaces: quick_exit, at_quick_exit
26 Implemented by Ulrich Drepper.
28 * Support for selecting between multiple function definitions at runtime
29 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
31 * The libcrypt library can now use the hash function implementations in
32 NSS. Implemented by Ulrich Drepper.
34 * The malloc implementation can be compiled to be less memory efficient
35 but higher performing in multi-threaded programs.
36 Implemented by Ulrich Drepper.
38 * New locale: nan_TW@latin
40 \f
41 Version 2.9
43 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
44 up at the same time. Implemented by Ulrich Drepper.
46 * TLS descriptors for LD and GD on x86 and x86-64.
47 Implemented by Alexandre Oliva.
49 * getaddrinfo now handles DCCP and UDPlite.
50 Implemented by Ulrich Drepper.
52 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
53 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
54 Implemented by Ulrich Drepper.
56 * New implementation of memmem, strstr, and strcasestr which is O(n).
57 Implemented by Eric Blake.
59 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
61 * Implement "e" option for popen to open file descriptor with the
62 close-on-exec flag set. Implemented by Ulrich Drepper.
64 * Implement "b" mode for fmemopen. In this mode writes writes don't
65 implicitly add a NUL byte and seeks from the end of the buffer really
66 use the buffer end, not the string length as the basis.
67 Implemented by Ulrich Drepper.
69 * Many functions, exported and internal, now atomically set the close-on-exec
70 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
72 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
73 Sinhala)
74 Implemented by Pravin Satpute.
76 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
77 \f
78 Version 2.8
80 * New locales: bo_CN, bo_IN, shs_CA.
82 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
84 * Sorting rules for some Indian languages (Devanagari and Gujarati).
85 Implemented by Pravin Satpute.
87 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
89 * nscd caches now all timeouts for DNS entries
90 Implemented by Ulrich Drepper.
92 * nscd is more efficient and wakes up less often.
93 Implemented by Ulrich Drepper.
95 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
96 vdprintf, and obstack_vprintf.
97 Implemented by Jakub Jelinek.
99 * Faster memset for x86-64.
100 Implemented by Harsha Jagasia and H.J. Lu.
102 * Faster memcpy on x86.
103 Implemented by Ulrich Drepper.
105 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
106 Implemented by Ulrich Drepper.
108 * Faster sqrt and sqrtf implemention for some PPC variants.
109 Implemented by Stephen Munroe.
110 \f
111 Version 2.7
113 * More checking functions: fread, fread_unlocked, open*, mq_open.
114 Implemented by Jakub Jelinek and Ulrich Drepper.
116 * Extend fortification to C++. Implemented by Jakub Jelinek.
118 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
119 by not recognizing 'a' as a modifier when those specs are requested.
120 Implemented by Jakub Jelinek.
122 * PPC optimizations to math and string functions.
123 Implemented by Steven Munroe.
125 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
126 options to be passed. Implemented by Ulrich Drepper.
128 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
130 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
131 Implemented by Ulrich Drepper.
133 * Handle private futexes in the NPTL implementation.
134 Implemented by Jakub Jelinek and Ulrich Drepper.
136 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
137 Implemented by Roland McGrath and Ulrich Drepper.
139 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
141 * SHA-256 and SHA-512 based password encryption.
142 Implemented by Ulrich Drepper.
144 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
145 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
146 yo_NG.
148 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
149 Implemented by Ulrich Drepper.
150 \f
151 Version 2.6
153 * New Linux interfaces: epoll_pwait, sched_getcpu.
155 * New generic interfaces: strerror_l.
157 * nscd can now cache the services database. Implemented by Ulrich Drepper.
159 \f
160 Version 2.5
162 * For Linux, the sorting of addresses returned by getaddrinfo now also
163 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
164 Implemented by Ulrich Drepper.
166 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
167 Implemented by Ulrich Drepper.
169 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
171 * New iconv module for MIK. Contributed by Alexander Shopov.
173 * For sites with broken group and/or passwd database, the auto-propagate
174 option of nscd can prevent creating ID lookup entries from the results
175 of a name lookup and vice versa. This usually is no problem but some
176 site might have problems with the default behavior.
177 Implemented by Ulrich Drepper.
179 * Iterating over entire database in NIS can be slow. With the
180 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
181 to trade time for memory. The entire database will be read at once.
182 Implemented by Ulrich Drepper.
184 * The interfaces introduced in RFC 3542 have been implemented by
185 Ulrich Drepper.
187 * Support for the new ELF hash table format was added by Ulrich Drepper.
189 * Support for priority inheritance mutexes added by Jakub Jelinek and
190 Ulrich Drepper.
192 * Support for priority protected mutexes added by Jakub Jelinek.
194 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
195 or_IN, csb_PL, fy_NL, sr_ME.
196 \f
197 Version 2.4
199 * More overflow detection functions.
201 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
202 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
204 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
205 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
206 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
207 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
208 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
209 by Masahide Washizawa.
211 * It is now possible to install audit libraries for the dynamic linker using
212 LD_AUDIT. Implemented by Ulrich Drepper.
214 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
215 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
216 For a libc and libpthread that works well on Linux 2.4 kernels, we
217 recommend using the stable 2.3 branch.
219 * The new function open_wmemstream acts like open_memstream,
220 but uses a wchar_t wide character buffer.
222 * The new function ppoll is an improved version of poll, similar to pselect.
224 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
225 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
226 renameat, unlinkat, linkat, symlinkat, readlinkat.
228 * New Linux kernel system calls: unshare,
229 inotify_init, inotify_add_watch, inotify_rm_watch.
231 * The euidaccess function is now also known by the alias eaccess,
232 for compatibility with some other systems.
234 * Timezone data updated to 2006b version.
235 \f
236 Version 2.3.6
238 * The following bugs are resolved with this release:
240 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
241 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
242 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
243 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
244 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
245 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
247 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
249 * As of this release, GCC 4 can be used to compile the C Library.
251 * Timezone data updated to 2005m version.
252 \f
253 Version 2.3.5
255 * The following bugs are resolved with this release:
257 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
258 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
259 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
260 777, 787, 821, 822, 823, 825
262 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
263 \f
264 Version 2.3.4
266 * Support for RFC 3678. Real implementations exist only for Linux so far.
267 Implemented by Ulrich Drepper.
269 * nscd can now cache entries persistently. Expiring entries are reloaded.
270 For speedups the cache can be shared in memory with client processes.
271 Implemented by Ulrich Drepper.
273 * nscd can now perform SELinux checks.
274 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
276 * getaddrinfo queries are now cached. Canonical name lookup is performed
277 efficiently.
278 Implemented by Ulrich Drepper.
280 * The nothrow function attribute is used when headers are used by gcc when
281 compiling C code. This can avoid significant amounts of exception
282 handling data.
284 * The malloc functions perform more error checking and are stricter when
285 it comes to reacting on errors. The default action is to terminate
286 the process after showing an error message. Implemented by Ulrich Drepper.
288 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
289 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
291 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
292 namespaces using the new function dlmopen(). This feature is of course,
293 like most other dynamic loading functionality, not available in statically
294 linked applications. Implemented by Ulrich Drepper.
296 * Low-overhead boundary checking variants of string and some stdio functions
297 were added. These are to be used in conjunction with a gcc patch by
298 Jakub Jelinek which adds calls to these functions if possible.
299 Implemented by Jakub Jelinek and Ulrich Drepper.
301 * Old code for several operating systems and machine architectures that
302 have not been in working condition in a long time have been removed from
303 the main source tree maintained by the GNU C Library's maintainers.
304 These files are now reside in the separate `ports' source module
305 that is usable as an add-on when building the library.
306 \f
307 Version 2.3.3
309 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
310 interrogate the dynamic linker, compatible with the Solaris interface.
312 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
313 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
315 * getifaddrs now uses the netlink interface on Linux to get its information.
316 Implemented by Thorsten Kukuk.
318 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
319 Implemented by Ulrich Drepper.
321 * support for non-executable stacks on x86 has been added. Changes mostly
322 by Roland McGrath.
324 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
325 and Ulrich Drepper.
327 * getaddrinfo now performs destination address selection according to
328 RFC 3484.
329 \f
330 Version 2.3.2
332 * Thread-safe interfaces for many functions that access locale data
333 were added in version 2.3, but these features were omitted from NEWS.
334 Many functions have variants with an `_l' suffix that take a `locale_t'
335 object as a parameter rather than consulting the current locale.
336 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
337 create and maintain `locale_t' objects. Additionally, the new function
338 `uselocale' sets "the current locale" (as used by functions not so
339 parameterized) set for an individual thread. These features were added
340 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
342 * The functions getresuid, getresgid, setresuid, and setresgid, which
343 have long been available on Linux, are now declared in <unistd.h>
344 and are now also available on the Hurd.
346 * ELF thread-local storage support (TLS) now works on x86-64.
348 * The new dynamic string token $LIB is expanded in shared library names.
349 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
351 * Aldy Hernandez contributed complete software floating point support for
352 PowerPC machines with no FPU.
354 * fexecve is implemented on Linux.
356 * The `btowc' function should work at least twice as fast due to
357 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
359 * With approriate thread add-ons cancelable functions are now implemented
360 in libc.so as well. No need to call the function in libpthread. This
361 change allowed to finally disable the incorrect and expensive handling
362 of weak definition in ld.so.
364 * Yet more PLT entries in libc.so have been removed. We finally arrived
365 at the bare minimum. Startup times improved appropriately.
367 * Support for the new Linux/x86 system call interface was added. The
368 AT_SYSINFO auxiliary vector entry is recognized and handled.
369 \f
370 Version 2.3
372 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
373 charsets.
375 * iconv (the program and the interface) now accepts empty names (excluding
376 options like //TRANSLIT) to mean "use charset of current locale".
378 * localedef can now transliterate characters in strings which are not in
379 the provided charmap. The information from the input locale is used.
381 * Prelinking support was added for ELF targets. This requires additional
382 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
384 * Read-only stdio streams now use mmap to speed up operation by eliminating
385 copying and buffer underflows. To use add 'm' to the mode string of
386 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
388 * The malloc functions were completely rewritten by Wolfram Gloger based
389 on Doug Lea's malloc-2.7.0.c.
391 * Isamu Hasegawa contributed a completely new and POSIX-conformant
392 implementation of regex.
394 * Bruno Haible upgraded the iconv and locale implementation to support
395 Unicode 3.2.
397 * Contents of the LC_* and LANG environment variables in the CEN style are
398 not recognized anymore. It never was used. Change by Ulrich Drepper.
400 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
401 thread-local storage (TLS) ABI on some platforms.
402 Changes by Ulrich Drepper. SH support by Kaz Kojima.
404 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
405 EUC-JISX0213, and TSCII.
407 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
408 BSD-compatible interface for getting all network interface addresses.
409 Implementation for IPv4 by Roland McGrath.
411 * Loading of locale data is faster due to the introduction of a locale
412 archive. Implemented by Roland McGrath and Ulrich Drepper.
414 * Startup times are significantly reduced by not using exported functions
415 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
416 and Ulrich Drepper.
418 * Steven Munroe contributed a port to PowerPC64/Linux.
419 \f
420 Version 2.2.6
422 * The Hurd now uses the GNU libio implementation of stdio rather than the
423 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
425 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
426 with the same behavior as the Linux system call of the same name.
427 \f
428 Version 2.2.5
430 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
431 128-bit long double format.
433 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
434 IBM1161, and IBM1162 charsets.
436 * Andreas Jaeger contributed a port to x86-64/Linux.
438 * Peter Bruin contributed a port to PowerPC/Hurd.
440 * libc functions using I/O streams now can handle wide-oriented streams
441 as well.
443 * optimizations in the dynamic linker. Binaries created by recent binutils
444 versions start up quicker due to reduced time spent on relocations.
446 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
447 \f
448 Version 2.2.4
450 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
451 asinh, atanh, j0 for the 128-bit long double format.
453 * Bruno Haible updated all the code handling Unicode in some form to
454 support Unicode 3.1.
456 * Speed of regex for single-byte locales is back to previous levels.
457 Patch by Isamu Hasegawa.
459 * Alpha, SPARC, and IA-64 now also using floating stacks.
461 * Startup time of internationalized applications greatly improved through
462 iconv cache. Use iconvconfig to generate the cache file.
463 Contributed by Ulrich Drepper.
465 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
466 severe performance problems. Patch by David Mosberger.
468 * The Hurd port got a lot more functionality like AIO, various stdio
469 extensions, etc. Mainly done by Roland McGrath.
471 * mtrace can now lookup symbols in shared libraries.
472 \f
473 Version 2.2.3
475 * Intel's IA-64 math library is largely integrated. It provides fast and
476 accurate implementatations for most basic and standard math functions
477 in float, double, and long double format.
479 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
480 and asin for the 96-bit long double format and asin, log, tan for the
481 128-bit long double format.
483 * The beginning of a last-bit accurate math library by IBM Haifa were added.
484 The basic double functions exist today. Contributed by Abraham Ziv
485 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
486 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
488 * An asynchronous name lookup library was added. The interface is designed
489 after POSIX AIO. The proposal was circulated beforehand to get comments.
490 No negative ones came in. Implemented by Ulrich Drepper.
492 * Port to S390/64bit contributed by Martin Schwidefsky
493 <schwidefsky@de.ibm.com>.
495 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
496 of functions for Linux/IA-64.
498 * The RPC code is now thread safe. Threads can now use the same service
499 of different services at the same time. Patch by Eric Norum
500 <eric.norum@usask.ca> with some help by Ulrich Drepper.
502 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
503 family of functions for Linux/S390.
505 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
506 of functions for Linux/x86.
508 * Port to Linux/CRIS contributed by Axis Communications.
509 \f
510 Version 2.2.2
512 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
513 we can now check for namespace violations and missing declarations. The
514 result is that almost all headers are now Unix-compliant (as defined in
515 the upcoming XPG6). The negative side is that some programs might need
516 corrections, too, if they depend on the incorrect form of the headers in
517 previous versions which defined too many symbols and included too many
518 other headers.
520 * regex now handles multibyte character sets correctly.
521 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
523 * iconv (the program) does now conform to the upcoming XPG6 and handles
524 charmaps. Instead of the charset names the path of charmaps can be
525 provided and the conversion happens based on this data.
526 Contributed by Ulrich Drepper.
528 * The locale program now provides detailed information about the installed
529 locales. While
531 locale -a
533 only lists the names of the supported locales
535 locale -a --verbose
537 provides details such as country, language, and codeset name.
538 Contributed by Ulrich Drepper.
539 \f
540 Version 2.2.1
542 * The gencat program now parses the input file according to the charset
543 selected by the LC_CTYPE category. This is important for stateful
544 character sets. To make generating catalogs easier there is a way
545 to overwrite the charset selected by the locale: before the first
546 message or $ quote line the catalog can contain a line like
548 $ codeset=ISO-8859-2
550 to select the charset (ISO-8859-2 in this case).
552 Implemented by Shinya Hanataka and Ulrich Drepper.
554 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
555 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
556 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
558 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
559 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
561 * The LANGUAGE environment variable is now ignored unless the locale is
562 changed from the default "C" locale.
564 * The usual bug fixes.
565 \f
566 Version 2.2
568 * Greg McGary added runtime support for bounds checking using gcc's
569 new -fbounded-pointers option. ix86 target is complete. PowerPC
570 is in progress.
572 * Thorsten Kukuk added secure mode support to nscd.
574 * The Berkeley db libraries have been removed.
576 Related, the nss_db module is now in a separate package since it
577 obviously requires a database library being available.
579 * Wide character I/O streams implemented by Ulrich Drepper.
581 * Functions from the extended socket API added by Ulrich Drepper.
583 * Functions feenableexcept and fedisableexcept to control the
584 behaviour of individual exceptions have been added by Andreas Jaeger.
586 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
588 * The resolver code has been updated from bind 8.2.3-T5B which supports
589 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
590 and Mark Kettenis.
592 This change could in some situations effect backward compatibility. Since
593 now `_res' is a thread-local instead of a global variable, modifying it
594 in one thread does not have any effect in other threads.
596 The resolver library was also extended to allow IPv6 as the transport
597 protocol for the requests. This work was done by Stig Venaas.
599 * Compatibility code for K&R C compilers has been removed from the
600 header files. A ISO C compiler is needed to use the library
601 (conforming to either C89 or C99 standard).
603 * Complete rewrite of the localedef program to support multibyte character
604 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
605 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
606 Implemented by Ulrich Drepper.
608 Bruno Haible significantly improved the generation and use of the data
609 structures for the wide character tables.
611 * Plural handling in gettext implemented by Ulrich Drepper.
613 * The utmp daemon has been removed.
615 * The port to MIPS-Linux has been finished by Andreas Jaeger.
617 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
618 and Yutaka Niibe.
620 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
622 * POSIX barriers implemented by Kaz Kylheku.
624 * POSIX spawn function family implemented by Ulrich Drepper.
626 * POSIX spinlocks are now available.
628 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
630 * the configure option --enable-kernel=X.Y.Z allows to strip out
631 compatibility for kernel versions before X.Y.Z. This is currently only
632 implemented for Linux.
634 * the sockaddr_in6 structure changed. The IPv6 working group added a new
635 field sin6_scope_id. This means that all programs using IPv6 should be
636 recompiled. Don't expect binary compatibility with previous glibc
637 versions.
639 * various conversion modules for IBM character sets contributed by
640 Masahide Washizawa.
642 * IA-64 port by Jes Sorensen and HJ Lu.
644 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
645 Compiling the GNU C Library for Linux/ia64
646 ******************************************
648 Please refer to the file INSTALL in the same directory as you found
649 this file for general information about configuring and compiling
650 glibc.
652 For general inquiries about glibc under Linux/ia64 please use the
653 following mailing list linux-ia64@linuxia64.org or one of the relevant
654 glibc mailing lists.
656 Recommended Tools for Compilation
657 =================================
659 In order for glibc-2.2 to build correctly on the ia64 you need at
660 least the following versions of the GNU tools (the :
662 * The Cygnus toolchain snapshot for the ia64 as of August 4
663 including the provided set of patches. It is however recommend
664 you use the October 24 toolchain snapshot or a more recent version.
666 OR alternatively you can try the following (the Cygnus toolchain is
667 the recommended solution):
669 * GCC and binutils, GAS and GNU LD out of CVS from
670 sources.redhat.com as of August 28, 2000 or later. The CVS tree
671 may require special patches to work properly on the ia64.
673 Configuring and compiling GNU Libc for Linux/ia64
674 =================================================
676 The library requires Linux kernel version 2.4.0-test4-000728 or
677 later to funtion properly. Besides that it support for debug libraries
678 is currently untested. Hence the following options
679 are required for configuring the library:
681 --disable-debug --enable-kernel=2.4.0
683 It is also important that you make sure the library picks up the
684 appropriate kernel header files, if you do not have recent enough
685 kernel headers in /usr/src/linux/include, you should use the
686 --with-headers=<path> option to specify the location.
688 As an example I personally use the following options to configure
689 the library:
691 --disable-debug
692 --disable-cvs
693 --enable-kernel=2.4.0
694 --host=ia64-linux
695 --enable-add-ons=yes
696 --prefix=/usr
697 --with-headers=/home/jes/linux/include
700 Good luck
702 Jes Sorensen <jes@linuxcare.com>,
703 November 14th, 2000
704 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
705 \f
706 Version 2.1.3
708 * bug fixes
710 \f
711 Version 2.1.2
713 * bug fixes
715 \f
716 Version 2.1.1
718 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
720 * New xdr functions are added; some rpc functions are now 64bit clean.
722 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
724 * Fixed known incompatibilities with glibc 2.0.
726 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
728 * Optimized a number of functions (especially the ELF dynamic loader).
730 * Update timezone data files.
732 * lots of charmaps corrections
734 * some new locale definitions and charmaps
736 \f
737 Version 2.1
739 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
740 conform to POSIX member type requirements. Symbol versions have been
741 adjusted as needed within the library, and for direct use by applications,
742 but there is potential for problems if third-party libraries use
743 struct timeval as part of their interface. This does not present
744 a problem for X and other "essential" system libraries.
746 * An additional locale model to support C++ Standard Library locale
747 model and probably more was implemented by Ulrich Drepper.
749 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
750 symbol level.
752 * Miles Bader provided the `argp' function family to support hierachical
753 command line argument parsing, layered on top of getopt.
755 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
757 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
758 numbers.
760 * scanf recognizes the %a and %A format for scanning floating point numbers.
762 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
763 information and interfaces for the available integer types.
765 * about 130 new math functions were added to implement the ISO C9x math
766 library.
768 * the new header <complex.h> contains definitions of the complex math
769 functions from ISO C 9X.
771 * the new header <tgmath.h> defines generic macros to use complex or
772 real valued functions.
774 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
776 * Andreas Jaeger provided a test suite for the math library.
778 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
780 * Ulrich Drepper added character set conversion functions (iconv).
782 * Optimized string functions have been added.
784 * The localedata addon is now part of glibc.
786 * An implementation of profiling shared libraries was added by Ulrich Drepper.
788 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
789 daemon for NSS (nscd).
791 Missing a better place here are some numbers on improvements. Under
792 Linux 2.1.125 un-tar-ing the kernel sources takes
794 user system wall
796 using local files 12.19s 6.88s 22.91s
798 using NIS 13.92s 8.91s 26.34s
800 using NIS & nscd 10.37s 7.34s 25.30s
802 using NIS+ 27.57s 30.37s 640.46s
804 using NIS+ & nscd 10.25s 7.83s 26.51s
806 using NIS & old nscd [1] 13.83s 8.32s 29.60s
808 Keep in mind that non-namelookup related operations dominate above times.
809 It was just a common complain that using NIS+ unpacking the kernel is
810 horribly slow.
812 [1] The old nscd implementation is not available anymore since it was
813 distributed with glibc up to version 2.0.98 and thus is now replaced.
815 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
817 * Mark Kettenis provided a Hesiod NSS module.
819 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
820 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
822 * rcmd can now handle netgroups (Dick Streefland).
824 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
825 Bambrough.
827 * Support for the IPv6 protocol has been added to the socket API, as per the
828 latest draft standards.
830 * Support for Linux 2.2 has been added.
832 * Interface changes relative to the latest 2.0.x release:
833 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
834 addseverity NEW: Unix98
835 alphasort64 NEW: LFS
836 argp_err_exit_status NEW: argp, GNU ext
837 argp_error NEW: argp, GNU ext
838 argp_failure NEW: argp, GNU ext
839 argp_help NEW: argp, GNU ext
840 argp_parse NEW: argp, GNU ext
841 argp_program_bug_address NEW: argp, GNU ext
842 argp_program_version NEW: argp, GNU ext
843 argp_program_version_hook NEW: argp, GNU ext
844 argp_state_help NEW: argp, GNU ext
845 argp_usage NEW: argp, GNU ext
846 authdes_create NEW: Secure RPC
847 authdes_getucred NEW: Secure RPC
848 authdes_pk_create NEW: Secure RPC
849 backtrace NEW: GNU ext.
850 backtrace_symbols NEW: GNU ext.
851 backtrace_symbols_fd NEW: GNU ext.
852 cacos NEW: ISO C 9x
853 cacosf NEW: ISO C 9x
854 cacosh NEW: ISO C 9x
855 cacoshf NEW: ISO C 9x
856 cacoshl NEW: ISO C 9x
857 cacosl NEW: ISO C 9x
858 capget NEW: kernel
859 capset NEW: kernel
860 carg NEW: ISO C 9x
861 cargf NEW: ISO C 9x
862 cargl NEW: ISO C 9x
863 casin NEW: ISO C 9x
864 casinf NEW: ISO C 9x
865 casinh NEW: ISO C 9x
866 casinhf NEW: ISO C 9x
867 casinhl NEW: ISO C 9x
868 casinl NEW: ISO C 9x
869 catan NEW: ISO C 9x
870 catanf NEW: ISO C 9x
871 catanh NEW: ISO C 9x
872 catanhf NEW: ISO C 9x
873 catanhl NEW: ISO C 9x
874 catanl NEW: ISO C 9x
875 cbc_crypt NEW: Secure RPC
876 ccos NEW: ISO C 9x
877 ccosf NEW: ISO C 9x
878 ccosh NEW: ISO C 9x
879 ccoshf NEW: ISO C 9x
880 ccoshl NEW: ISO C 9x
881 ccosl NEW: ISO C 9x
882 cexp NEW: ISO C 9x
883 cexpf NEW: ISO C 9x
884 cexpl NEW: ISO C 9x
885 cimag NEW: ISO C 9x
886 cimagf NEW: ISO C 9x
887 cimagl NEW: ISO C 9x
888 clearerr_locked REMOVED
889 clntunix_create NEW: sunrpc ext
890 clog NEW: ISO C 9x
891 clog10 NEW: ISO C 9x
892 clog10f NEW: ISO C 9x
893 clog10l NEW: ISO C 9x
894 clogf NEW: ISO C 9x
895 clogl NEW: ISO C 9x
896 conj NEW: ISO C 9x
897 conjf NEW: ISO C 9x
898 conjl NEW: ISO C 9x
899 cpow NEW: ISO C 9x
900 cpowf NEW: ISO C 9x
901 cpowl NEW: ISO C 9x
902 cproj NEW: ISO C 9x
903 cprojf NEW: ISO C 9x
904 cprojl NEW: ISO C 9x
905 creal NEW: ISO C 9x
906 crealf NEW: ISO C 9x
907 creall NEW: ISO C 9x
908 creat64 NEW: LFS
909 csin NEW: ISO C 9x
910 csinf NEW: ISO C 9x
911 csinh NEW: ISO C 9x
912 csinhf NEW: ISO C 9x
913 csinhl NEW: ISO C 9x
914 csinl NEW: ISO C 9x
915 csqrt NEW: ISO C 9x
916 csqrtf NEW: ISO C 9x
917 csqrtl NEW: ISO C 9x
918 ctan NEW: ISO C 9x
919 ctanf NEW: ISO C 9x
920 ctanh NEW: ISO C 9x
921 ctanhf NEW: ISO C 9x
922 ctanhl NEW: ISO C 9x
923 ctanl NEW: ISO C 9x
924 des_setparity NEW: Secure RPC
925 ecb_crypt NEW: Secure RPC
926 endutxent NEW: Unix98
927 exp10 NEW: ISO C 9x
928 exp10f NEW: ISO C 9x
929 exp10l NEW: ISO C 9x
930 exp2 NEW: ISO C 9x
931 exp2f NEW: ISO C 9x
932 exp2l NEW: ISO C 9x
933 fattach NEW: STREAMS
934 fdetach NEW: STREAMS
935 fdim NEW: ISO C 9x
936 fdimf NEW: ISO C 9x
937 fdiml NEW: ISO C 9x
938 feclearexcept NEW: ISO C 9x
939 fegetenv NEW: ISO C 9x
940 fegetexceptflag NEW: ISO C 9x
941 fegetround NEW: ISO C 9x
942 feholdexcept NEW: ISO C 9x
943 feof_locked REMOVED
944 feraiseexcept NEW: ISO C 9x
945 ferror_locked REMOVED
946 fesetenv NEW: ISO C 9x
947 fesetexceptflag NEW: ISO C 9x
948 fesetround NEW: ISO C 9x
949 fetestexcept NEW: ISO C 9x
950 feupdateenv NEW: ISO C 9x
951 fflush_locked REMOVED
952 ffsl NEW: GNU ext.
953 ffsll NEW: GNU ext.
954 fgetpos64 NEW: LFS
955 fgets_unlocked NEW: GNU ext.
956 fileno_locked REMOVED
957 fma NEW: ISO C 9x
958 fmaf NEW: ISO C 9x
959 fmal NEW: ISO C 9x
960 fmax NEW: ISO C 9x
961 fmaxf NEW: ISO C 9x
962 fmaxl NEW: ISO C 9x
963 fmin NEW: ISO C 9x
964 fminf NEW: ISO C 9x
965 fminl NEW: ISO C 9x
966 fmtmsg NEW: Unix98
967 fopen64 NEW: LFS
968 fputc_locked REMOVED
969 fputs_unlocked NEW: GNU ext.
970 fread_unlocked NEW: GNU ext.
971 freopen64 NEW: LFS
972 fseeko NEW: Unix98
973 fsetpos64 NEW: LFS
974 fstatfs64 NEW: LFS
975 fstatvfs NEW: Unix98
976 fstatvfs64 NEW: LFS
977 ftello NEW: Unix98
978 ftello64 NEW: LFS
979 ftruncate64 NEW: LFS
980 ftw64 NEW: LFS
981 fwrite_unlocked NEW: GNU ext.
982 gai_strerror NEW: IPv6
983 gamma_r REMOVED
984 gammaf_r REMOVED
985 gammal_r REMOVED
986 getchar_locked REMOVED
987 getdate NEW: Unix98
988 getdate_err NEW: Unix98
989 getdate_r NEW: GNU ext.
990 getmsg NEW: STREAMS
991 getnameinfo NEW: IPv6
992 getnetname NEW: Secure RPC
993 getpmsg NEW: STREAMS
994 getpt NEW: Unix98 PTY
995 getrlimit64 NEW: LFS
996 getutxent NEW: Unix98
997 getutxid NEW: Unix98
998 getutxline NEW: Unix98
999 glob64 NEW: GNU ext.
1000 globfree64 NEW: GNU ext.
1001 gnu_get_libc_release NEW: GNU ext.
1002 gnu_get_libc_version NEW: GNU ext.
1003 grantpt NEW: Unix98 PTY
1004 host2netname NEW: Secure RPC
1005 iconv NEW: iconv
1006 iconv_close NEW: iconv
1007 iconv_open NEW: iconv
1008 if_freenameindex NEW: IPv6
1009 if_indextoname NEW: IPv6
1010 if_nameindex NEW: IPv6
1011 if_nametoindex NEW: IPv6
1012 in6addr_any NEW: IPv6
1013 in6addr_loopback NEW: IPv6
1014 inet6_isipv4mapped NEW: IPv6
1015 isastream NEW: STREAMS
1016 iswblank NEW: GNU ext.
1017 key_decryptsession NEW: Secure RPC
1018 key_decryptsession_pk NEW: Secure RPC
1019 key_encryptsession NEW: Secure RPC
1020 key_encryptsession_pk NEW: Secure RPC
1021 key_gendes NEW: Secure RPC
1022 key_get_conv NEW: Secure RPC
1023 key_secretkey_is_set NEW: Secure RPC
1024 key_setnet NEW: Secure RPC
1025 key_setsecret NEW: Secure RPC
1026 llrint NEW: ISO C 9x
1027 llrintf NEW: ISO C 9x
1028 llrintl NEW: ISO C 9x
1029 llround NEW: ISO C 9x
1030 llroundf NEW: ISO C 9x
1031 llroundl NEW: ISO C 9x
1032 log2 NEW: ISO C 9x
1033 log2f NEW: ISO C 9x
1034 log2l NEW: ISO C 9x
1035 lrint NEW: ISO C 9x
1036 lrintf NEW: ISO C 9x
1037 lrintl NEW: ISO C 9x
1038 lround NEW: ISO C 9x
1039 lroundf NEW: ISO C 9x
1040 lroundl NEW: ISO C 9x
1041 lseek64 NEW: LFS
1042 makecontext NEW: Unix98
1043 mempcpy NEW: GNU ext.
1044 mmap64 NEW: LFS
1045 moncontrol REMOVED
1046 modify_ldt NEW: kernel
1047 nan NEW: ISO C 9x
1048 nanf NEW: ISO C 9x
1049 nanl NEW: ISO C 9x
1050 nearbyint NEW: ISO C 9x
1051 nearbyintf NEW: ISO C 9x
1052 nearbyintl NEW: ISO C 9x
1053 netname2host NEW: Secure RPC
1054 netname2user NEW: Secure RPC
1055 nexttoward NEW: ISO C 9x
1056 nexttowardf NEW: ISO C 9x
1057 nexttowardl NEW: ISO C 9x
1058 nftw NEW: Unix98
1059 nftw64 NEW: LFS
1060 open64 NEW: LFS
1061 passwd2des NEW: Secure RPC
1062 pow10 NEW: GNU ext.
1063 pow10f NEW: GNU ext.
1064 pow10l NEW: GNU ext.
1065 pread NEW: Unix98
1066 pread64 NEW: LFS
1067 printf_size NEW: GNU ext.
1068 printf_size_info NEW: GNU ext.
1069 profil_counter REMOVED
1070 pthread_mutexattr_getkind_np REPLACED
1071 pthread_mutexattr_setkind_np REPLACED
1072 ptsname NEW: Unix98 PTY
1073 ptsname_r NEW: Unix98 PTY
1074 putc_locked REMOVED
1075 putchar_locked REMOVED
1076 putgrent NEW: GNU ext.
1077 putmsg NEW: STREAMS
1078 putpmsg NEW: STREAMS
1079 pututxline NEW: Unix98
1080 pwrite NEW: Unix98
1081 pwrite64 NEW: LFS
1082 readdir64 NEW: LFS
1083 readdir64_r NEW: LFS
1084 remquo NEW: ISO C 9x
1085 remquof NEW: ISO C 9x
1086 remquol NEW: ISO C 9x
1087 round NEW: ISO C 9x
1088 roundf NEW: ISO C 9x
1089 roundl NEW: ISO C 9x
1090 rtime NEW: GNU ext.
1091 scalbln NEW: ISO C 9x
1092 scalblnf NEW: ISO C 9x
1093 scalblnl NEW: ISO C 9x
1094 scandir64 NEW: LFS
1095 sendfile NEW: kernel
1096 setcontext NEW: Unix98
1097 setrlimit64 NEW: LFS
1098 setutxent NEW: Unix98
1099 sighold NEW: Unix98
1100 sigignore NEW: Unix98
1101 sigqueue NEW: POSIX.1b
1102 sigrelse NEW: Unix98
1103 sigset NEW: POSIX.1b
1104 sigtimedwait NEW: POSIX.1b
1105 sigwaitinfo NEW: POSIX.1b
1106 sincos NEW: GNU ext.
1107 sincosf NEW: GNU ext.
1108 sincosl NEW: GNU ext.
1109 statfs64 NEW: LFS
1110 statvfs NEW: Unix98
1111 statvfs64 NEW: LFS
1112 strcasestr NEW: GNU ext.
1113 strtoimax NEW: ISO C 9x
1114 strtoumax NEW: ISO C 9x
1115 strverscmp NEW: GNU ext.
1116 svcauthdes_stats NEW: Secure RPC
1117 svcunix_create NEW: sunrpc etx
1118 svcunixfd_create NEW: sunrpc ext
1119 swapcontext NEW: Unix98
1120 tcgetsid NEW: Unix98 PTY
1121 tdestroy NEW: GNU ext.
1122 tgamma NEW: ISO C 9x
1123 tgammaf NEW: ISO C 9x
1124 tgammal NEW: ISO C 9x
1125 tmpfile64 NEW: LFS
1126 trunc NEW: ISO C 9x
1127 truncate64 NEW: LFS
1128 truncf NEW: ISO C 9x
1129 truncl NEW: ISO C 9x
1130 umount2 NEW: kernel
1131 unlockpt NEW: Unix98 PTY
1132 updwtmpx NEW: Unix98
1133 user2netname NEW: Secure RPC
1134 utmpxname NEW: Unix98
1135 versionsort NEW: GNU ext.
1136 versionsort64 NEW: GNU ext.
1137 waitid NEW: Unix98
1138 wcscasecmp NEW: GNU ext.
1139 wcsncasecmp NEW: GNU ext.
1140 wcsnlen NEW: GNU ext.
1141 wcstoimax NEW: ISO C 9x
1142 wcstoll NEW: ISO C 9x
1143 wcstoull NEW: ISO C 9x
1144 wcstoumax NEW: ISO C 9x
1145 wcswcs NEW: Unix98
1146 wordexp NEW: POSIX.2
1147 wordfree NEW: POSIX.2
1148 write_profiling REMOVED
1149 xdecrypt NEW: Secure RPC
1150 xdr_authdes_cred NEW: Secure RPC
1151 xdr_authdes_verf NEW: Secure RPC
1152 xdr_cryptkeyarg NEW: Secure RPC
1153 xdr_cryptkeyarg2 NEW: Secure RPC
1154 xdr_cryptkeyres NEW: Secure RPC
1155 xdr_getcredres NEW: Secure RPC
1156 xdr_key_netstarg NEW: Secure RPC
1157 xdr_key_netstres NEW: Secure RPC
1158 xdr_keybuf NEW: Secure RPC
1159 xdr_keystatus NEW: Secure RPC
1160 xdr_netnamestr NEW: Secure RPC
1161 xdr_sizeof NEW: Secure RPC
1162 xdr_unixcred NEW: sunrpc ext
1163 xencrypt NEW: Secure RPC
1164 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1165 \f
1166 Version 2.0.6
1168 * more bug fixes
1170 \f
1171 Version 2.0.5
1173 * more bug fixes
1175 * inet_ntoa is thread-safe
1177 * updwtmp is moved from libutil to libc
1179 * rewrite of cbrt function
1181 * update of timezone data
1182 \f
1183 Version 2.0.4
1185 * more bug fixes
1186 \f
1187 Version 2.0.3
1189 * more bug fixes
1190 \f
1191 Version 2.0.2
1193 * more bug fixes
1195 * add atoll function
1197 * fix complex problems in Berkeley DB code
1199 * fix math functions
1200 \f
1201 Version 2.0.1
1203 * fixed lots of header problems (especially Linux/GNU specific)
1205 * dynamic loader preserves all registers
1207 * Roland McGrath provided support for handling of auxiliary objects in
1208 the ELF dynamic loader.
1210 * support for parallel builds is improved
1211 \f
1212 Version 2.0
1214 * GNU extensions are no longer declared by default. To enable them you
1215 must define the macro `_GNU_SOURCE' in your program or compile with
1216 `-D_GNU_SOURCE'.
1218 * The library has changed from using GNU ld symbol aliases to using weak
1219 symbols where available. The ELF object file format supports weak
1220 symbols; GNU ld also supports weak symbols in the a.out format. (There
1221 is also now support for other GNU ld extensions in ELF. Use the
1222 `--with-elf' option to configure to indicate you have ELF, and
1223 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1224 of many files which contained only symbol aliases, reducing the size of
1225 the source and the compiled library; many other files were renamed to
1226 less cryptic names previously occupied by the symbol alias files.
1227 There is a new header file <elf.h> for programs which operate on
1228 files in the ELF format.
1230 * Converted to Autoconf version 2, so `configure' has more options.
1231 Run `configure --help' to see the details.
1233 * The library can now be configured to build profiling, highly-optimized
1234 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1235 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1236 `configure' enable building these extra libraries. The shared library is
1237 built by default when using both ELF and GNU ld. When shared libraries
1238 are enabled, the new library `-ldl' is available for arbitrary run-time
1239 loading of shared objects; its interface is defined in <dlfcn.h>. The
1240 new header file <link.h> gives access to the internals of the run-time
1241 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1242 application of same name on other systems and it provides information
1243 about dynamically linked binaries.
1245 * The C library now provides the run-time support code for profiling
1246 executables compiled with `-pg'. Programs can control the profiling code
1247 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1248 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1249 the support for this file format was contributed by David Mosberger-Tang.
1251 * The math code has been replaced with a math library based on fdlibm from
1252 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1253 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1254 functions. The math functions now reside in a separate library, so
1255 programs using them will need to use `-lm' their linking commands.
1257 * John C. Bowman contributed optimized ix87 assembler inline functions.
1259 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1260 mechanism similar to that found in Solaris 2. This is now used for the
1261 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1262 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1263 file controls what services are used for each individual database. This
1264 works by loading shared libraries with names specified in `nsswitch.conf',
1265 so service modules can be changed or added at any time without even
1266 relinking any program. Currently there are the file, db, and NIS based
1267 NSS services available.
1269 * The new functions `strtoq' and `strtouq' parse integer values from
1270 strings, like `strtol' and `strtoul', but they return `long long int' and
1271 `unsigned long long int' values, respectively (64-bit quantities).
1273 * The new functions `strtof' and `strtold' parse floating-point values from
1274 strings, like `strtod', but they return `float' and `long double' values,
1275 respectively (on some machines `double' and `long double' are the same).
1277 * Ulrich Drepper has contributed new implementations of the floating-point
1278 printing and reading code used in the `printf' family of functions and
1279 `strtod', `strtof', and `strtold'. These new functions are perfectly
1280 accurate, and much faster than the old ones.
1282 * The implementation of the POSIX locale model was completely rewritten by
1283 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1284 to compile the POSIX locale definition.
1286 * The former dummy implementations of the strcoll and strxfrm function are
1287 now replaced by fully functional code contributed by Ulrich Drepper. The
1288 collation information comes from the POSIX locale definitions.
1290 * The new header <langinfo.h> defines an interface for accessing
1291 various locale-dependent data (using the locale chosen with `setlocale').
1293 * Ulrich Drepper has contributed a new suite of functions for operation on
1294 wide-character and multibyte-character strings, in <wchar.h>;
1295 and classification and case conversion of wide characters, in <wctype.h>.
1296 These new functions are conforming to the ISO C, Amendement 1 specification.
1298 * There is now a second implementation of the standard I/O library available.
1299 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1300 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1302 * You can now use positional parameter specifications in format strings
1303 for the `printf' and `scanf' families of functions. For example,
1304 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1305 ``Number 6, Mr Jones''. This is mainly useful when providing different
1306 format strings for different languages, whose grammars may dictate
1307 different orderings of the values being printed. To support this
1308 feature, the interface for `register_printf_handler' has changed; see
1309 the header file <printf.h> for details.
1311 * The `printf' and `scanf' families of functions now understand a new
1312 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1313 to group numbers as indicated by the locale; for `scanf' and friends, this
1314 says to accept as valid only a number with all the proper grouping
1315 separators in the right places. In the default "C" locale, numbers are
1316 not grouped; but locales for specific countries will define the usual
1317 conventions (i.e. separate thousands with `,' in the US locale).
1319 * The pgrp functions have been regularized, slightly incompatibly but much
1320 less confusingly. The core functions are now `getpgid' and `setpgid',
1321 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1322 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1323 provided for compatibility. There is no longer an incompatible `getpgrp'
1324 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1326 * The new header file <fts.h> and suite of functions simplify programs that
1327 operate on directory trees. This code comes from 4.4 BSD.
1329 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1330 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1331 NSS scheme used in glibc.
1333 * There is a new malloc debugging hook `__memalign_hook'.
1335 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1336 `unsigned int' in <sys/types.h>. These are for compatibility only and
1337 their use is discouraged.
1339 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1340 done differently, so that it works even without GNU ld.
1342 * New function `euidaccess' checks allowed access to a file like `access',
1343 but using the effective IDs instead of the real IDs.
1345 * The time zone data files have been updated for the latest and greatest
1346 local time conventions of the countries of the world.
1348 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1349 see <dirent.h>.
1351 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1352 for formatting floating-point numbers. They are provided only for
1353 compatibility; new programs should use `sprintf' instead. There are
1354 also equivalent function for the `long double' floating-point type and
1355 all functions also exist in a reentrant form.
1357 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1358 functions for maintaining the login-record files (primarily of use to
1359 system programs such as `login'), and convenient functions for
1360 allocating and initializing a pseudo-terminal (pty) device.
1362 * Ulrich Drepper has contributed new support for System V style
1363 shared memory and IPC on systems that support it.
1365 * Ulrich Drepper has contributed several miscellaneous new functions found
1366 in System V: The `hsearch' family of functions provide an effective
1367 implementation of hash tables; `a64l' and `l64a' provide a very simple
1368 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1369 number generator.
1371 * Ulrich Drepper has contributed new reentrant counterparts for the
1372 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1374 * Ulrich Drepper has contributed new, highly-optimized versions of several
1375 string functions for the i486/Pentium family of processors.
1377 * Ulrich Drepper has updated the Linux-specific code, based largely
1378 on work done in Hongjiu Lu's version of GNU libc for Linux.
1379 The GNU library now supports Linux versions 2.0.10 and later,
1380 using the ELF object file format (i[3456]86-*-linux).
1382 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1384 * David Mosberger-Tang and Richard Henderson have ported the C library
1385 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1386 dynamic linking support for ELF/Alpha.
1388 * Richard Henderson contributed several Alpha optimized assembler function
1389 for arithmetic and string handling.
1391 * Ulrich Drepper has contributed a new set of message catalog functions to
1392 support multiple languages using the <libintl.h> interface, for use with
1393 his new package GNU gettext. Translation volunteers have contributed
1394 catalogs of the library's messages in Spanish, German, and Korean.
1396 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1397 program and the `catgets' function for reading the catalog files it
1398 creates. (The <libintl.h> interface is preferred; we include the
1399 <nl_types.h> interface using `catgets' only for source compatibility with
1400 programs already written to use it.)
1402 * New header file <values.h> gives SVID-compatible names for <limits.h>
1403 constants.
1405 * Various new macros, declarations, and small header files for compatibility
1406 with 4.4 BSD.
1408 * New function `group_member' is a convenient way to check if a process has
1409 a given effective group ID.
1411 * When using GCC 2.7 and later, the socket functions are now declared in a
1412 special way so that passing an argument of type `struct sockaddr_in *',
1413 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1414 `struct sockaddr *' type, does not generate a type-clash warning.
1416 * New function `error' declared in header file <error.h> is a convenient
1417 function for printing error messages and optionally exiting; this is the
1418 canonical function used in GNU programs. The new functions `err', `warn',
1419 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1420 doing the same thing.
1422 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1423 POSIX.2 `glob' function to do ~ and {...} expansion.
1425 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1426 `clearenv' which is used in POSIX.9 is also available.
1428 * New function `getsid' returns session ID number on systems that support it.
1430 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1431 files <db.h> and <mpool.h> provide a rich set of functions for several
1432 types of simple databases stored in memory and in files, and <ndbm.h> is
1433 an old `ndbm'-compatible interface using the `db' functions. Link with
1434 `-ldb' to get these functions.
1436 * New macro `strdupa' copies a string like `strdup', but uses local stack
1437 space from `alloca' instead of dynamic heap space from `malloc'.
1439 * New function `strnlen' is like `strlen' but searches only a given maximum
1440 number of characters for the null terminator. `stpncpy', `strndup' and
1441 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1442 function.
1444 * New function `statfs' in header <sys/statfs.h>.
1446 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1447 provide convenient functions for operating on blocks of null-terminated
1448 strings.
1450 * A new suite of functions in <utmp.h> handle all the details of reading
1451 and writing the utmp file.
1453 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1454 Thorsten Kukuk.
1456 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1457 completely POSIX compliant and also implemented the extended functionality
1458 to handle alternate digit representation and alternate era date formats.
1460 * Ulrich Drepper provided an implementation of the `strptime' function
1461 defined in XPG4.2 which transforms a string into a `struct tm' value.
1463 * Paul Eggert provided the tzselect shell script as part of the timezone
1464 code. The shell script makes it easy to select the correct timezone
1465 specification.
1467 * The implementation of the malloc family of functions is completely replaced
1468 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1469 The implementation uses the mmap function (if available) and it is
1470 optimized for the use in multi threaded programs.
1472 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1473 functions. This new functionality is usable by specifying a special
1474 salt string and it is compatible with implementation on *BSD systems.
1476 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1477 `getsubopt' to handle second level command line options, `bsd_signal'
1478 to access BSD style `signal' functionality, the obsolete `regexp' style
1479 expression matcher.
1481 * the `lchown' function is available on system which support this
1482 functionality.
1484 * The implementation of the shadow password handling function was contributed
1485 by Ulrich Drepper.
1487 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1489 * POSIX.1g support was added. The <sys/select.h> header is available,
1490 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1491 implementation of `getaddrinfo'.
1492 \f
1493 Version 1.09
1495 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1497 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1498 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1500 * The new function `daemon' from 4.4 BSD is useful for server programs that
1501 want to put themselves in the background.
1503 * Joel Sherrill has contributed support for several standalone boards that
1504 run without an operating system.
1506 * `printf', `scanf' and friends now accept a `q' type modifier for long
1507 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1509 * All of the code taken from BSD (notably most of the math and networking
1510 routines) has been updated from the BSD 4.4-Lite release.
1512 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1514 * The new functions `getdomainname' and `setdomainname' fetch or change the
1515 YP/NIS domain name. These are system calls which exist on systems which
1516 have YP (aka NIS).
1518 * The time zone data files have been updated for the latest international
1519 conventions.
1521 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1522 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1523 \f
1524 Version 1.08
1526 * The C library now includes support for Sun RPC, from Sun's free
1527 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1528 are included. (There is still no support for YP.)
1530 * Tom Quinn has contributed a port of the C library to SGI machines running
1531 Irix 4 (mips-sgi-irix4).
1533 * The new `lockf' function is a simplified interface to the locking
1534 facilities of `fcntl', included for compatibility.
1536 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1538 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1540 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1541 compatibility.
1543 * The error message printed by `assert' for a failed assertion now includes
1544 the name of the program (if using GNU ld) and the name of the calling
1545 function (with versions of GCC that support this).
1547 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1549 * The library now includes the <sys/mman.h> header file and memory
1550 management functions `mmap', `munmap', `mprotect', `msync', and
1551 `madvise', on systems that support those facilities.
1553 * The interface for `mcheck' has changed slightly: the function called to
1554 abort the program when an allocation inconsistency is detected now takes
1555 an argument that indicates the type of failure. The new function
1556 `mprobe' lets you request a consistency check for a particular block at
1557 any time (checks are normally done only when you call `free' or `realloc'
1558 on a block).
1560 * It is now possible to easily cross-compile the C library, building on one
1561 system a library to run on another machine and/or operating system. All
1562 you need to do is set the variable `HOST_CC' in `configparms' to the
1563 native compiler for programs to run on the machine you are building on (a
1564 few generator programs are used on Unix systems); set `CC' to the
1565 cross-compiler.
1567 * The new function `fexecve' (only implemented on the GNU system) executes
1568 a program file given a file descriptor already open on the file.
1569 \f
1570 Version 1.07
1572 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1573 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1575 * You can set the variable `libprefix' in `configparms' to specify a prefix
1576 to be prepended to installed library files; this makes it easy to install
1577 the GNU C library to be linked as `-lgnuc' or whatever.
1579 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1580 copies a limited number of characters from a string, and returns the
1581 address of the last character written.
1583 * You no longer need to check for whether the installed `stddef.h' is
1584 compatible with the GNU C library. configure now checks for you.
1586 * You can now define a per-stream `fileno' function to convert the
1587 stream's cookie into an integral file descriptor.
1589 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1590 allocates zero bytes of storage, and returns a unique pointer which
1591 you can pass to `realloc' or `free'. The behavior is undefined if
1592 you dereference this pointer.
1594 * The C library now runs on Sony NEWS m68k machines running either
1595 NewsOS 3 or NewsOS 4.
1597 * The new `syscall' function is a system-dependent primitive function
1598 for invoking system calls. It has the canonical behavior on Unix
1599 systems, including unreliable return values for some calls (such as
1600 `pipe', `fork' and `getppid').
1602 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1603 to `EAGAIN', which is the preferred name. On systems whose kernels
1604 use two distinct codes, the C library now translates EWOULDBLOCK to
1605 EAGAIN in every system call function.
1606 \f
1607 Version 1.06
1609 * The GNU C Library Reference Manual is now distributed with the library.
1610 `make dvi' will produce a DVI file of the printed manual.
1611 `make info' will produce Info files that you can read on line using C-h i
1612 in Emacs or the `info' program.
1613 Please send comments on the manual to bug-glibc-manual@gnu.org.
1615 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1617 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1619 * Jason Merrill has contributed a port to the Sequent Symmetry running
1620 Dynix version 3 (i386-sequent-dynix).
1622 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1623 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1625 * New function `memory_warnings' lets you arrange to get warnings when
1626 malloc is running out of memory to allocate, like Emacs gives you.
1628 * The C library now contains the relocating allocator used in Emacs 19 for
1629 its editing buffers. This allocator (ralloc) minimizes allocation
1630 overhead and fragmentation by moving allocated regions around whenever it
1631 needs to. You always refer to a ralloc'd region with a "handle" (a
1632 pointer to a pointer--an object of type `void **').
1634 * There is a new `printf' format: `%m' gives you the string corresponding
1635 to the error code in `errno'.
1637 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1638 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1639 pass, the `a' modifier says to fill in a `char **' you pass with a
1640 malloc'd string.
1642 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1643 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1644 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1646 * `mkstemp' is a traditional Unix function to atomically create and open a
1647 uniquely-named temporary file.
1648 \f
1649 Version 1.05
1651 * The standard location for the file that says what the local timezone is
1652 has changed again. It is now `/usr/local/etc/localtime' (or more
1653 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1655 * The distribution no longer contains any files with names longer than 14
1656 characters.
1658 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1659 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1661 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1662 \f
1663 Version 1.04
1665 * The configuration process has changed quite a bit. The `configure'
1666 script is now used just like the configuration scripts for other GNU
1667 packages. The `sysdeps' directory hierarchy is much rearranged.
1668 The file `INSTALL' explains the new scheme in detail.
1670 * The header files no longer need to be processed into ANSI C and
1671 traditional C versions. There is just one set of files to install, and
1672 it will work with ANSI or old C compilers (including `gcc -traditional').
1674 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1675 MIPS DECStation running Ultrix 4.
1677 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1678 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1679 made itself into a shared library.
1681 * Yet further improved support for the i386, running 4.3 BSD-like systems
1682 (such as Mach 3 with the Unix single-server), or System V.
1684 * New function `strncasecmp' to do case-insensitive string comparison
1685 with limited length.
1687 * New function `strsep' is a reentrant alternative to `strtok'.
1689 * New functions `scandir' and `alphasort' for searching directories.
1691 * New function `setenv' is a better interface to `putenv'.
1693 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1694 function for traversing a directory tree.
1696 * The GNU obstack package is now also part of the C library.
1697 The new function `open_obstack_stream' creates a stdio stream that
1698 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1699 formatted output directly to an obstack.
1701 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1702 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1704 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1706 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1707 things to your strings.
1709 * There are some new test programs: test-fseek, testmb, and testrand.
1711 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1712 These ports are not finished, but are a good starting place for really
1713 supporting those systems.
1715 * `/etc/localtime' is now the standard location for the file that says what
1716 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1717 This follows the general principle that `/etc' is the place for all local
1718 configuration files.
1720 * The C library header files now use `extern "C"' when used by the C++
1721 compiler, so the C library should now work with C++ code.
1723 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1724 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
1725 in <strings.h>.)
1727 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1728 function which uses the `merge sort' algorithm, and is said to be
1729 significantly faster than the old GNU `qsort' function. Merge sort is
1730 now the standard `qsort' function. The new algorithm can require a lot
1731 of temporary storage; so, the old sorting function is called when the
1732 required storage is not available.
1734 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1735 provides the Unix `crypt' function, plus some other entry points.
1737 * The code and header files taken from 4.4 BSD have been updated with the
1738 latest files released from Berkeley.
1739 \f
1740 ----------------------------------------------------------------------
1741 Copyright information:
1743 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1744 Free Software Foundation, Inc.
1746 Permission is granted to anyone to make or distribute verbatim copies
1747 of this document as received, in any medium, provided that the
1748 copyright notice and this permission notice are preserved,
1749 thus giving the recipient permission to redistribute in turn.
1751 Permission is granted to distribute modified versions
1752 of this document, or of portions of it,
1753 under the above conditions, provided also that they
1754 carry prominent notices stating who last changed them.
1755 \f
1756 Local variables:
1757 version-control: never
1758 End: