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1 GNU C Library NEWS -- history of user-visible changes. 2009-5-15
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 2.11
10 * checking version of longjmp added that fails if an uninitialized stack
11 frame would be created. Implemented by Ulrich Drepper.
13 \f
14 Version 2.10
16 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
17 Implemented by Ulrich Drepper.
19 * New Linux interfaces: accept4, fallocate, fallocate64.
20 Implemented by Ulrich Drepper.
22 * Correct declarations of string function when used in C++ code. This
23 could lead to compile errors for invalid C++ code.
25 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
26 now in POSIX.
28 * New POSIX 2008 interface: psiginfo
29 Implemented by Ulrich Drepper.
31 * New ISO C++1x interfaces: quick_exit, at_quick_exit
32 Implemented by Ulrich Drepper.
34 * Support for selecting between multiple function definitions at runtime
35 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
37 * The libcrypt library can now use the hash function implementations in
38 NSS. Implemented by Ulrich Drepper.
40 * The malloc implementation can be compiled to be less memory efficient
41 but higher performing in multi-threaded programs.
42 Implemented by Ulrich Drepper.
44 * New locales: nan_TW@latin, ks_IN
46 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
47 Implemented by Ulrich Drepper.
49 * Extended printf hook support. It is possible to use user-defined types
50 and extend existing format specifiers.
51 Implemented by Ulrich Drepper.
53 * Handling for group shadow files has been added.
54 Implemented by Ulrich Drepper.
56 \f
57 Version 2.9
59 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
60 up at the same time. Implemented by Ulrich Drepper.
62 * TLS descriptors for LD and GD on x86 and x86-64.
63 Implemented by Alexandre Oliva.
65 * getaddrinfo now handles DCCP and UDPlite.
66 Implemented by Ulrich Drepper.
68 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
69 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
70 Implemented by Ulrich Drepper.
72 * New implementation of memmem, strstr, and strcasestr which is O(n).
73 Implemented by Eric Blake.
75 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
77 * Implement "e" option for popen to open file descriptor with the
78 close-on-exec flag set. Implemented by Ulrich Drepper.
80 * Implement "b" mode for fmemopen. In this mode writes writes don't
81 implicitly add a NUL byte and seeks from the end of the buffer really
82 use the buffer end, not the string length as the basis.
83 Implemented by Ulrich Drepper.
85 * Many functions, exported and internal, now atomically set the close-on-exec
86 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
88 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
89 Sinhala)
90 Implemented by Pravin Satpute.
92 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
93 \f
94 Version 2.8
96 * New locales: bo_CN, bo_IN, shs_CA.
98 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
100 * Sorting rules for some Indian languages (Devanagari and Gujarati).
101 Implemented by Pravin Satpute.
103 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
105 * nscd caches now all timeouts for DNS entries
106 Implemented by Ulrich Drepper.
108 * nscd is more efficient and wakes up less often.
109 Implemented by Ulrich Drepper.
111 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
112 vdprintf, and obstack_vprintf.
113 Implemented by Jakub Jelinek.
115 * Faster memset for x86-64.
116 Implemented by Harsha Jagasia and H.J. Lu.
118 * Faster memcpy on x86.
119 Implemented by Ulrich Drepper.
121 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
122 Implemented by Ulrich Drepper.
124 * Faster sqrt and sqrtf implemention for some PPC variants.
125 Implemented by Stephen Munroe.
126 \f
127 Version 2.7
129 * More checking functions: fread, fread_unlocked, open*, mq_open.
130 Implemented by Jakub Jelinek and Ulrich Drepper.
132 * Extend fortification to C++. Implemented by Jakub Jelinek.
134 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
135 by not recognizing 'a' as a modifier when those specs are requested.
136 Implemented by Jakub Jelinek.
138 * PPC optimizations to math and string functions.
139 Implemented by Steven Munroe.
141 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
142 options to be passed. Implemented by Ulrich Drepper.
144 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
146 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
147 Implemented by Ulrich Drepper.
149 * Handle private futexes in the NPTL implementation.
150 Implemented by Jakub Jelinek and Ulrich Drepper.
152 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
153 Implemented by Roland McGrath and Ulrich Drepper.
155 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
157 * SHA-256 and SHA-512 based password encryption.
158 Implemented by Ulrich Drepper.
160 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
161 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
162 yo_NG.
164 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
165 Implemented by Ulrich Drepper.
166 \f
167 Version 2.6
169 * New Linux interfaces: epoll_pwait, sched_getcpu.
171 * New generic interfaces: strerror_l.
173 * nscd can now cache the services database. Implemented by Ulrich Drepper.
175 \f
176 Version 2.5
178 * For Linux, the sorting of addresses returned by getaddrinfo now also
179 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
180 Implemented by Ulrich Drepper.
182 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
183 Implemented by Ulrich Drepper.
185 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
187 * New iconv module for MIK. Contributed by Alexander Shopov.
189 * For sites with broken group and/or passwd database, the auto-propagate
190 option of nscd can prevent creating ID lookup entries from the results
191 of a name lookup and vice versa. This usually is no problem but some
192 site might have problems with the default behavior.
193 Implemented by Ulrich Drepper.
195 * Iterating over entire database in NIS can be slow. With the
196 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
197 to trade time for memory. The entire database will be read at once.
198 Implemented by Ulrich Drepper.
200 * The interfaces introduced in RFC 3542 have been implemented by
201 Ulrich Drepper.
203 * Support for the new ELF hash table format was added by Ulrich Drepper.
205 * Support for priority inheritance mutexes added by Jakub Jelinek and
206 Ulrich Drepper.
208 * Support for priority protected mutexes added by Jakub Jelinek.
210 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
211 or_IN, csb_PL, fy_NL, sr_ME.
212 \f
213 Version 2.4
215 * More overflow detection functions.
217 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
218 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
220 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
221 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
222 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
223 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
224 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
225 by Masahide Washizawa.
227 * It is now possible to install audit libraries for the dynamic linker using
228 LD_AUDIT. Implemented by Ulrich Drepper.
230 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
231 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
232 For a libc and libpthread that works well on Linux 2.4 kernels, we
233 recommend using the stable 2.3 branch.
235 * The new function open_wmemstream acts like open_memstream,
236 but uses a wchar_t wide character buffer.
238 * The new function ppoll is an improved version of poll, similar to pselect.
240 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
241 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
242 renameat, unlinkat, linkat, symlinkat, readlinkat.
244 * New Linux kernel system calls: unshare,
245 inotify_init, inotify_add_watch, inotify_rm_watch.
247 * The euidaccess function is now also known by the alias eaccess,
248 for compatibility with some other systems.
250 * Timezone data updated to 2006b version.
251 \f
252 Version 2.3.6
254 * The following bugs are resolved with this release:
256 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
257 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
258 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
259 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
260 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
261 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
263 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
265 * As of this release, GCC 4 can be used to compile the C Library.
267 * Timezone data updated to 2005m version.
268 \f
269 Version 2.3.5
271 * The following bugs are resolved with this release:
273 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
274 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
275 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
276 777, 787, 821, 822, 823, 825
278 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
279 \f
280 Version 2.3.4
282 * Support for RFC 3678. Real implementations exist only for Linux so far.
283 Implemented by Ulrich Drepper.
285 * nscd can now cache entries persistently. Expiring entries are reloaded.
286 For speedups the cache can be shared in memory with client processes.
287 Implemented by Ulrich Drepper.
289 * nscd can now perform SELinux checks.
290 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
292 * getaddrinfo queries are now cached. Canonical name lookup is performed
293 efficiently.
294 Implemented by Ulrich Drepper.
296 * The nothrow function attribute is used when headers are used by gcc when
297 compiling C code. This can avoid significant amounts of exception
298 handling data.
300 * The malloc functions perform more error checking and are stricter when
301 it comes to reacting on errors. The default action is to terminate
302 the process after showing an error message. Implemented by Ulrich Drepper.
304 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
305 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
307 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
308 namespaces using the new function dlmopen(). This feature is of course,
309 like most other dynamic loading functionality, not available in statically
310 linked applications. Implemented by Ulrich Drepper.
312 * Low-overhead boundary checking variants of string and some stdio functions
313 were added. These are to be used in conjunction with a gcc patch by
314 Jakub Jelinek which adds calls to these functions if possible.
315 Implemented by Jakub Jelinek and Ulrich Drepper.
317 * Old code for several operating systems and machine architectures that
318 have not been in working condition in a long time have been removed from
319 the main source tree maintained by the GNU C Library's maintainers.
320 These files are now reside in the separate `ports' source module
321 that is usable as an add-on when building the library.
322 \f
323 Version 2.3.3
325 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
326 interrogate the dynamic linker, compatible with the Solaris interface.
328 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
329 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
331 * getifaddrs now uses the netlink interface on Linux to get its information.
332 Implemented by Thorsten Kukuk.
334 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
335 Implemented by Ulrich Drepper.
337 * support for non-executable stacks on x86 has been added. Changes mostly
338 by Roland McGrath.
340 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
341 and Ulrich Drepper.
343 * getaddrinfo now performs destination address selection according to
344 RFC 3484.
345 \f
346 Version 2.3.2
348 * Thread-safe interfaces for many functions that access locale data
349 were added in version 2.3, but these features were omitted from NEWS.
350 Many functions have variants with an `_l' suffix that take a `locale_t'
351 object as a parameter rather than consulting the current locale.
352 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
353 create and maintain `locale_t' objects. Additionally, the new function
354 `uselocale' sets "the current locale" (as used by functions not so
355 parameterized) set for an individual thread. These features were added
356 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
358 * The functions getresuid, getresgid, setresuid, and setresgid, which
359 have long been available on Linux, are now declared in <unistd.h>
360 and are now also available on the Hurd.
362 * ELF thread-local storage support (TLS) now works on x86-64.
364 * The new dynamic string token $LIB is expanded in shared library names.
365 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
367 * Aldy Hernandez contributed complete software floating point support for
368 PowerPC machines with no FPU.
370 * fexecve is implemented on Linux.
372 * The `btowc' function should work at least twice as fast due to
373 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
375 * With approriate thread add-ons cancelable functions are now implemented
376 in libc.so as well. No need to call the function in libpthread. This
377 change allowed to finally disable the incorrect and expensive handling
378 of weak definition in ld.so.
380 * Yet more PLT entries in libc.so have been removed. We finally arrived
381 at the bare minimum. Startup times improved appropriately.
383 * Support for the new Linux/x86 system call interface was added. The
384 AT_SYSINFO auxiliary vector entry is recognized and handled.
385 \f
386 Version 2.3
388 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
389 charsets.
391 * iconv (the program and the interface) now accepts empty names (excluding
392 options like //TRANSLIT) to mean "use charset of current locale".
394 * localedef can now transliterate characters in strings which are not in
395 the provided charmap. The information from the input locale is used.
397 * Prelinking support was added for ELF targets. This requires additional
398 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
400 * Read-only stdio streams now use mmap to speed up operation by eliminating
401 copying and buffer underflows. To use add 'm' to the mode string of
402 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
404 * The malloc functions were completely rewritten by Wolfram Gloger based
405 on Doug Lea's malloc-2.7.0.c.
407 * Isamu Hasegawa contributed a completely new and POSIX-conformant
408 implementation of regex.
410 * Bruno Haible upgraded the iconv and locale implementation to support
411 Unicode 3.2.
413 * Contents of the LC_* and LANG environment variables in the CEN style are
414 not recognized anymore. It never was used. Change by Ulrich Drepper.
416 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
417 thread-local storage (TLS) ABI on some platforms.
418 Changes by Ulrich Drepper. SH support by Kaz Kojima.
420 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
421 EUC-JISX0213, and TSCII.
423 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
424 BSD-compatible interface for getting all network interface addresses.
425 Implementation for IPv4 by Roland McGrath.
427 * Loading of locale data is faster due to the introduction of a locale
428 archive. Implemented by Roland McGrath and Ulrich Drepper.
430 * Startup times are significantly reduced by not using exported functions
431 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
432 and Ulrich Drepper.
434 * Steven Munroe contributed a port to PowerPC64/Linux.
435 \f
436 Version 2.2.6
438 * The Hurd now uses the GNU libio implementation of stdio rather than the
439 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
441 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
442 with the same behavior as the Linux system call of the same name.
443 \f
444 Version 2.2.5
446 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
447 128-bit long double format.
449 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
450 IBM1161, and IBM1162 charsets.
452 * Andreas Jaeger contributed a port to x86-64/Linux.
454 * Peter Bruin contributed a port to PowerPC/Hurd.
456 * libc functions using I/O streams now can handle wide-oriented streams
457 as well.
459 * optimizations in the dynamic linker. Binaries created by recent binutils
460 versions start up quicker due to reduced time spent on relocations.
462 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
463 \f
464 Version 2.2.4
466 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
467 asinh, atanh, j0 for the 128-bit long double format.
469 * Bruno Haible updated all the code handling Unicode in some form to
470 support Unicode 3.1.
472 * Speed of regex for single-byte locales is back to previous levels.
473 Patch by Isamu Hasegawa.
475 * Alpha, SPARC, and IA-64 now also using floating stacks.
477 * Startup time of internationalized applications greatly improved through
478 iconv cache. Use iconvconfig to generate the cache file.
479 Contributed by Ulrich Drepper.
481 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
482 severe performance problems. Patch by David Mosberger.
484 * The Hurd port got a lot more functionality like AIO, various stdio
485 extensions, etc. Mainly done by Roland McGrath.
487 * mtrace can now lookup symbols in shared libraries.
488 \f
489 Version 2.2.3
491 * Intel's IA-64 math library is largely integrated. It provides fast and
492 accurate implementatations for most basic and standard math functions
493 in float, double, and long double format.
495 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
496 and asin for the 96-bit long double format and asin, log, tan for the
497 128-bit long double format.
499 * The beginning of a last-bit accurate math library by IBM Haifa were added.
500 The basic double functions exist today. Contributed by Abraham Ziv
501 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
502 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
504 * An asynchronous name lookup library was added. The interface is designed
505 after POSIX AIO. The proposal was circulated beforehand to get comments.
506 No negative ones came in. Implemented by Ulrich Drepper.
508 * Port to S390/64bit contributed by Martin Schwidefsky
509 <schwidefsky@de.ibm.com>.
511 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
512 of functions for Linux/IA-64.
514 * The RPC code is now thread safe. Threads can now use the same service
515 of different services at the same time. Patch by Eric Norum
516 <eric.norum@usask.ca> with some help by Ulrich Drepper.
518 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
519 family of functions for Linux/S390.
521 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
522 of functions for Linux/x86.
524 * Port to Linux/CRIS contributed by Axis Communications.
525 \f
526 Version 2.2.2
528 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
529 we can now check for namespace violations and missing declarations. The
530 result is that almost all headers are now Unix-compliant (as defined in
531 the upcoming XPG6). The negative side is that some programs might need
532 corrections, too, if they depend on the incorrect form of the headers in
533 previous versions which defined too many symbols and included too many
534 other headers.
536 * regex now handles multibyte character sets correctly.
537 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
539 * iconv (the program) does now conform to the upcoming XPG6 and handles
540 charmaps. Instead of the charset names the path of charmaps can be
541 provided and the conversion happens based on this data.
542 Contributed by Ulrich Drepper.
544 * The locale program now provides detailed information about the installed
545 locales. While
547 locale -a
549 only lists the names of the supported locales
551 locale -a --verbose
553 provides details such as country, language, and codeset name.
554 Contributed by Ulrich Drepper.
555 \f
556 Version 2.2.1
558 * The gencat program now parses the input file according to the charset
559 selected by the LC_CTYPE category. This is important for stateful
560 character sets. To make generating catalogs easier there is a way
561 to overwrite the charset selected by the locale: before the first
562 message or $ quote line the catalog can contain a line like
564 $ codeset=ISO-8859-2
566 to select the charset (ISO-8859-2 in this case).
568 Implemented by Shinya Hanataka and Ulrich Drepper.
570 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
571 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
572 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
574 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
575 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
577 * The LANGUAGE environment variable is now ignored unless the locale is
578 changed from the default "C" locale.
580 * The usual bug fixes.
581 \f
582 Version 2.2
584 * Greg McGary added runtime support for bounds checking using gcc's
585 new -fbounded-pointers option. ix86 target is complete. PowerPC
586 is in progress.
588 * Thorsten Kukuk added secure mode support to nscd.
590 * The Berkeley db libraries have been removed.
592 Related, the nss_db module is now in a separate package since it
593 obviously requires a database library being available.
595 * Wide character I/O streams implemented by Ulrich Drepper.
597 * Functions from the extended socket API added by Ulrich Drepper.
599 * Functions feenableexcept and fedisableexcept to control the
600 behaviour of individual exceptions have been added by Andreas Jaeger.
602 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
604 * The resolver code has been updated from bind 8.2.3-T5B which supports
605 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
606 and Mark Kettenis.
608 This change could in some situations effect backward compatibility. Since
609 now `_res' is a thread-local instead of a global variable, modifying it
610 in one thread does not have any effect in other threads.
612 The resolver library was also extended to allow IPv6 as the transport
613 protocol for the requests. This work was done by Stig Venaas.
615 * Compatibility code for K&R C compilers has been removed from the
616 header files. A ISO C compiler is needed to use the library
617 (conforming to either C89 or C99 standard).
619 * Complete rewrite of the localedef program to support multibyte character
620 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
621 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
622 Implemented by Ulrich Drepper.
624 Bruno Haible significantly improved the generation and use of the data
625 structures for the wide character tables.
627 * Plural handling in gettext implemented by Ulrich Drepper.
629 * The utmp daemon has been removed.
631 * The port to MIPS-Linux has been finished by Andreas Jaeger.
633 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
634 and Yutaka Niibe.
636 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
638 * POSIX barriers implemented by Kaz Kylheku.
640 * POSIX spawn function family implemented by Ulrich Drepper.
642 * POSIX spinlocks are now available.
644 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
646 * the configure option --enable-kernel=X.Y.Z allows to strip out
647 compatibility for kernel versions before X.Y.Z. This is currently only
648 implemented for Linux.
650 * the sockaddr_in6 structure changed. The IPv6 working group added a new
651 field sin6_scope_id. This means that all programs using IPv6 should be
652 recompiled. Don't expect binary compatibility with previous glibc
653 versions.
655 * various conversion modules for IBM character sets contributed by
656 Masahide Washizawa.
658 * IA-64 port by Jes Sorensen and HJ Lu.
660 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
661 Compiling the GNU C Library for Linux/ia64
662 ******************************************
664 Please refer to the file INSTALL in the same directory as you found
665 this file for general information about configuring and compiling
666 glibc.
668 For general inquiries about glibc under Linux/ia64 please use the
669 following mailing list linux-ia64@linuxia64.org or one of the relevant
670 glibc mailing lists.
672 Recommended Tools for Compilation
673 =================================
675 In order for glibc-2.2 to build correctly on the ia64 you need at
676 least the following versions of the GNU tools (the :
678 * The Cygnus toolchain snapshot for the ia64 as of August 4
679 including the provided set of patches. It is however recommend
680 you use the October 24 toolchain snapshot or a more recent version.
682 OR alternatively you can try the following (the Cygnus toolchain is
683 the recommended solution):
685 * GCC and binutils, GAS and GNU LD out of CVS from
686 sources.redhat.com as of August 28, 2000 or later. The CVS tree
687 may require special patches to work properly on the ia64.
689 Configuring and compiling GNU Libc for Linux/ia64
690 =================================================
692 The library requires Linux kernel version 2.4.0-test4-000728 or
693 later to funtion properly. Besides that it support for debug libraries
694 is currently untested. Hence the following options
695 are required for configuring the library:
697 --disable-debug --enable-kernel=2.4.0
699 It is also important that you make sure the library picks up the
700 appropriate kernel header files, if you do not have recent enough
701 kernel headers in /usr/src/linux/include, you should use the
702 --with-headers=<path> option to specify the location.
704 As an example I personally use the following options to configure
705 the library:
707 --disable-debug
708 --disable-cvs
709 --enable-kernel=2.4.0
710 --host=ia64-linux
711 --enable-add-ons=yes
712 --prefix=/usr
713 --with-headers=/home/jes/linux/include
716 Good luck
718 Jes Sorensen <jes@linuxcare.com>,
719 November 14th, 2000
720 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
721 \f
722 Version 2.1.3
724 * bug fixes
726 \f
727 Version 2.1.2
729 * bug fixes
731 \f
732 Version 2.1.1
734 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
736 * New xdr functions are added; some rpc functions are now 64bit clean.
738 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
740 * Fixed known incompatibilities with glibc 2.0.
742 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
744 * Optimized a number of functions (especially the ELF dynamic loader).
746 * Update timezone data files.
748 * lots of charmaps corrections
750 * some new locale definitions and charmaps
752 \f
753 Version 2.1
755 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
756 conform to POSIX member type requirements. Symbol versions have been
757 adjusted as needed within the library, and for direct use by applications,
758 but there is potential for problems if third-party libraries use
759 struct timeval as part of their interface. This does not present
760 a problem for X and other "essential" system libraries.
762 * An additional locale model to support C++ Standard Library locale
763 model and probably more was implemented by Ulrich Drepper.
765 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
766 symbol level.
768 * Miles Bader provided the `argp' function family to support hierachical
769 command line argument parsing, layered on top of getopt.
771 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
773 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
774 numbers.
776 * scanf recognizes the %a and %A format for scanning floating point numbers.
778 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
779 information and interfaces for the available integer types.
781 * about 130 new math functions were added to implement the ISO C9x math
782 library.
784 * the new header <complex.h> contains definitions of the complex math
785 functions from ISO C 9X.
787 * the new header <tgmath.h> defines generic macros to use complex or
788 real valued functions.
790 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
792 * Andreas Jaeger provided a test suite for the math library.
794 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
796 * Ulrich Drepper added character set conversion functions (iconv).
798 * Optimized string functions have been added.
800 * The localedata addon is now part of glibc.
802 * An implementation of profiling shared libraries was added by Ulrich Drepper.
804 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
805 daemon for NSS (nscd).
807 Missing a better place here are some numbers on improvements. Under
808 Linux 2.1.125 un-tar-ing the kernel sources takes
810 user system wall
812 using local files 12.19s 6.88s 22.91s
814 using NIS 13.92s 8.91s 26.34s
816 using NIS & nscd 10.37s 7.34s 25.30s
818 using NIS+ 27.57s 30.37s 640.46s
820 using NIS+ & nscd 10.25s 7.83s 26.51s
822 using NIS & old nscd [1] 13.83s 8.32s 29.60s
824 Keep in mind that non-namelookup related operations dominate above times.
825 It was just a common complain that using NIS+ unpacking the kernel is
826 horribly slow.
828 [1] The old nscd implementation is not available anymore since it was
829 distributed with glibc up to version 2.0.98 and thus is now replaced.
831 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
833 * Mark Kettenis provided a Hesiod NSS module.
835 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
836 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
838 * rcmd can now handle netgroups (Dick Streefland).
840 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
841 Bambrough.
843 * Support for the IPv6 protocol has been added to the socket API, as per the
844 latest draft standards.
846 * Support for Linux 2.2 has been added.
848 * Interface changes relative to the latest 2.0.x release:
849 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
850 addseverity NEW: Unix98
851 alphasort64 NEW: LFS
852 argp_err_exit_status NEW: argp, GNU ext
853 argp_error NEW: argp, GNU ext
854 argp_failure NEW: argp, GNU ext
855 argp_help NEW: argp, GNU ext
856 argp_parse NEW: argp, GNU ext
857 argp_program_bug_address NEW: argp, GNU ext
858 argp_program_version NEW: argp, GNU ext
859 argp_program_version_hook NEW: argp, GNU ext
860 argp_state_help NEW: argp, GNU ext
861 argp_usage NEW: argp, GNU ext
862 authdes_create NEW: Secure RPC
863 authdes_getucred NEW: Secure RPC
864 authdes_pk_create NEW: Secure RPC
865 backtrace NEW: GNU ext.
866 backtrace_symbols NEW: GNU ext.
867 backtrace_symbols_fd NEW: GNU ext.
868 cacos NEW: ISO C 9x
869 cacosf NEW: ISO C 9x
870 cacosh NEW: ISO C 9x
871 cacoshf NEW: ISO C 9x
872 cacoshl NEW: ISO C 9x
873 cacosl NEW: ISO C 9x
874 capget NEW: kernel
875 capset NEW: kernel
876 carg NEW: ISO C 9x
877 cargf NEW: ISO C 9x
878 cargl NEW: ISO C 9x
879 casin NEW: ISO C 9x
880 casinf NEW: ISO C 9x
881 casinh NEW: ISO C 9x
882 casinhf NEW: ISO C 9x
883 casinhl NEW: ISO C 9x
884 casinl NEW: ISO C 9x
885 catan NEW: ISO C 9x
886 catanf NEW: ISO C 9x
887 catanh NEW: ISO C 9x
888 catanhf NEW: ISO C 9x
889 catanhl NEW: ISO C 9x
890 catanl NEW: ISO C 9x
891 cbc_crypt NEW: Secure RPC
892 ccos NEW: ISO C 9x
893 ccosf NEW: ISO C 9x
894 ccosh NEW: ISO C 9x
895 ccoshf NEW: ISO C 9x
896 ccoshl NEW: ISO C 9x
897 ccosl NEW: ISO C 9x
898 cexp NEW: ISO C 9x
899 cexpf NEW: ISO C 9x
900 cexpl NEW: ISO C 9x
901 cimag NEW: ISO C 9x
902 cimagf NEW: ISO C 9x
903 cimagl NEW: ISO C 9x
904 clearerr_locked REMOVED
905 clntunix_create NEW: sunrpc ext
906 clog NEW: ISO C 9x
907 clog10 NEW: ISO C 9x
908 clog10f NEW: ISO C 9x
909 clog10l NEW: ISO C 9x
910 clogf NEW: ISO C 9x
911 clogl NEW: ISO C 9x
912 conj NEW: ISO C 9x
913 conjf NEW: ISO C 9x
914 conjl NEW: ISO C 9x
915 cpow NEW: ISO C 9x
916 cpowf NEW: ISO C 9x
917 cpowl NEW: ISO C 9x
918 cproj NEW: ISO C 9x
919 cprojf NEW: ISO C 9x
920 cprojl NEW: ISO C 9x
921 creal NEW: ISO C 9x
922 crealf NEW: ISO C 9x
923 creall NEW: ISO C 9x
924 creat64 NEW: LFS
925 csin NEW: ISO C 9x
926 csinf NEW: ISO C 9x
927 csinh NEW: ISO C 9x
928 csinhf NEW: ISO C 9x
929 csinhl NEW: ISO C 9x
930 csinl NEW: ISO C 9x
931 csqrt NEW: ISO C 9x
932 csqrtf NEW: ISO C 9x
933 csqrtl NEW: ISO C 9x
934 ctan NEW: ISO C 9x
935 ctanf NEW: ISO C 9x
936 ctanh NEW: ISO C 9x
937 ctanhf NEW: ISO C 9x
938 ctanhl NEW: ISO C 9x
939 ctanl NEW: ISO C 9x
940 des_setparity NEW: Secure RPC
941 ecb_crypt NEW: Secure RPC
942 endutxent NEW: Unix98
943 exp10 NEW: ISO C 9x
944 exp10f NEW: ISO C 9x
945 exp10l NEW: ISO C 9x
946 exp2 NEW: ISO C 9x
947 exp2f NEW: ISO C 9x
948 exp2l NEW: ISO C 9x
949 fattach NEW: STREAMS
950 fdetach NEW: STREAMS
951 fdim NEW: ISO C 9x
952 fdimf NEW: ISO C 9x
953 fdiml NEW: ISO C 9x
954 feclearexcept NEW: ISO C 9x
955 fegetenv NEW: ISO C 9x
956 fegetexceptflag NEW: ISO C 9x
957 fegetround NEW: ISO C 9x
958 feholdexcept NEW: ISO C 9x
959 feof_locked REMOVED
960 feraiseexcept NEW: ISO C 9x
961 ferror_locked REMOVED
962 fesetenv NEW: ISO C 9x
963 fesetexceptflag NEW: ISO C 9x
964 fesetround NEW: ISO C 9x
965 fetestexcept NEW: ISO C 9x
966 feupdateenv NEW: ISO C 9x
967 fflush_locked REMOVED
968 ffsl NEW: GNU ext.
969 ffsll NEW: GNU ext.
970 fgetpos64 NEW: LFS
971 fgets_unlocked NEW: GNU ext.
972 fileno_locked REMOVED
973 fma NEW: ISO C 9x
974 fmaf NEW: ISO C 9x
975 fmal NEW: ISO C 9x
976 fmax NEW: ISO C 9x
977 fmaxf NEW: ISO C 9x
978 fmaxl NEW: ISO C 9x
979 fmin NEW: ISO C 9x
980 fminf NEW: ISO C 9x
981 fminl NEW: ISO C 9x
982 fmtmsg NEW: Unix98
983 fopen64 NEW: LFS
984 fputc_locked REMOVED
985 fputs_unlocked NEW: GNU ext.
986 fread_unlocked NEW: GNU ext.
987 freopen64 NEW: LFS
988 fseeko NEW: Unix98
989 fsetpos64 NEW: LFS
990 fstatfs64 NEW: LFS
991 fstatvfs NEW: Unix98
992 fstatvfs64 NEW: LFS
993 ftello NEW: Unix98
994 ftello64 NEW: LFS
995 ftruncate64 NEW: LFS
996 ftw64 NEW: LFS
997 fwrite_unlocked NEW: GNU ext.
998 gai_strerror NEW: IPv6
999 gamma_r REMOVED
1000 gammaf_r REMOVED
1001 gammal_r REMOVED
1002 getchar_locked REMOVED
1003 getdate NEW: Unix98
1004 getdate_err NEW: Unix98
1005 getdate_r NEW: GNU ext.
1006 getmsg NEW: STREAMS
1007 getnameinfo NEW: IPv6
1008 getnetname NEW: Secure RPC
1009 getpmsg NEW: STREAMS
1010 getpt NEW: Unix98 PTY
1011 getrlimit64 NEW: LFS
1012 getutxent NEW: Unix98
1013 getutxid NEW: Unix98
1014 getutxline NEW: Unix98
1015 glob64 NEW: GNU ext.
1016 globfree64 NEW: GNU ext.
1017 gnu_get_libc_release NEW: GNU ext.
1018 gnu_get_libc_version NEW: GNU ext.
1019 grantpt NEW: Unix98 PTY
1020 host2netname NEW: Secure RPC
1021 iconv NEW: iconv
1022 iconv_close NEW: iconv
1023 iconv_open NEW: iconv
1024 if_freenameindex NEW: IPv6
1025 if_indextoname NEW: IPv6
1026 if_nameindex NEW: IPv6
1027 if_nametoindex NEW: IPv6
1028 in6addr_any NEW: IPv6
1029 in6addr_loopback NEW: IPv6
1030 inet6_isipv4mapped NEW: IPv6
1031 isastream NEW: STREAMS
1032 iswblank NEW: GNU ext.
1033 key_decryptsession NEW: Secure RPC
1034 key_decryptsession_pk NEW: Secure RPC
1035 key_encryptsession NEW: Secure RPC
1036 key_encryptsession_pk NEW: Secure RPC
1037 key_gendes NEW: Secure RPC
1038 key_get_conv NEW: Secure RPC
1039 key_secretkey_is_set NEW: Secure RPC
1040 key_setnet NEW: Secure RPC
1041 key_setsecret NEW: Secure RPC
1042 llrint NEW: ISO C 9x
1043 llrintf NEW: ISO C 9x
1044 llrintl NEW: ISO C 9x
1045 llround NEW: ISO C 9x
1046 llroundf NEW: ISO C 9x
1047 llroundl NEW: ISO C 9x
1048 log2 NEW: ISO C 9x
1049 log2f NEW: ISO C 9x
1050 log2l NEW: ISO C 9x
1051 lrint NEW: ISO C 9x
1052 lrintf NEW: ISO C 9x
1053 lrintl NEW: ISO C 9x
1054 lround NEW: ISO C 9x
1055 lroundf NEW: ISO C 9x
1056 lroundl NEW: ISO C 9x
1057 lseek64 NEW: LFS
1058 makecontext NEW: Unix98
1059 mempcpy NEW: GNU ext.
1060 mmap64 NEW: LFS
1061 moncontrol REMOVED
1062 modify_ldt NEW: kernel
1063 nan NEW: ISO C 9x
1064 nanf NEW: ISO C 9x
1065 nanl NEW: ISO C 9x
1066 nearbyint NEW: ISO C 9x
1067 nearbyintf NEW: ISO C 9x
1068 nearbyintl NEW: ISO C 9x
1069 netname2host NEW: Secure RPC
1070 netname2user NEW: Secure RPC
1071 nexttoward NEW: ISO C 9x
1072 nexttowardf NEW: ISO C 9x
1073 nexttowardl NEW: ISO C 9x
1074 nftw NEW: Unix98
1075 nftw64 NEW: LFS
1076 open64 NEW: LFS
1077 passwd2des NEW: Secure RPC
1078 pow10 NEW: GNU ext.
1079 pow10f NEW: GNU ext.
1080 pow10l NEW: GNU ext.
1081 pread NEW: Unix98
1082 pread64 NEW: LFS
1083 printf_size NEW: GNU ext.
1084 printf_size_info NEW: GNU ext.
1085 profil_counter REMOVED
1086 pthread_mutexattr_getkind_np REPLACED
1087 pthread_mutexattr_setkind_np REPLACED
1088 ptsname NEW: Unix98 PTY
1089 ptsname_r NEW: Unix98 PTY
1090 putc_locked REMOVED
1091 putchar_locked REMOVED
1092 putgrent NEW: GNU ext.
1093 putmsg NEW: STREAMS
1094 putpmsg NEW: STREAMS
1095 pututxline NEW: Unix98
1096 pwrite NEW: Unix98
1097 pwrite64 NEW: LFS
1098 readdir64 NEW: LFS
1099 readdir64_r NEW: LFS
1100 remquo NEW: ISO C 9x
1101 remquof NEW: ISO C 9x
1102 remquol NEW: ISO C 9x
1103 round NEW: ISO C 9x
1104 roundf NEW: ISO C 9x
1105 roundl NEW: ISO C 9x
1106 rtime NEW: GNU ext.
1107 scalbln NEW: ISO C 9x
1108 scalblnf NEW: ISO C 9x
1109 scalblnl NEW: ISO C 9x
1110 scandir64 NEW: LFS
1111 sendfile NEW: kernel
1112 setcontext NEW: Unix98
1113 setrlimit64 NEW: LFS
1114 setutxent NEW: Unix98
1115 sighold NEW: Unix98
1116 sigignore NEW: Unix98
1117 sigqueue NEW: POSIX.1b
1118 sigrelse NEW: Unix98
1119 sigset NEW: POSIX.1b
1120 sigtimedwait NEW: POSIX.1b
1121 sigwaitinfo NEW: POSIX.1b
1122 sincos NEW: GNU ext.
1123 sincosf NEW: GNU ext.
1124 sincosl NEW: GNU ext.
1125 statfs64 NEW: LFS
1126 statvfs NEW: Unix98
1127 statvfs64 NEW: LFS
1128 strcasestr NEW: GNU ext.
1129 strtoimax NEW: ISO C 9x
1130 strtoumax NEW: ISO C 9x
1131 strverscmp NEW: GNU ext.
1132 svcauthdes_stats NEW: Secure RPC
1133 svcunix_create NEW: sunrpc etx
1134 svcunixfd_create NEW: sunrpc ext
1135 swapcontext NEW: Unix98
1136 tcgetsid NEW: Unix98 PTY
1137 tdestroy NEW: GNU ext.
1138 tgamma NEW: ISO C 9x
1139 tgammaf NEW: ISO C 9x
1140 tgammal NEW: ISO C 9x
1141 tmpfile64 NEW: LFS
1142 trunc NEW: ISO C 9x
1143 truncate64 NEW: LFS
1144 truncf NEW: ISO C 9x
1145 truncl NEW: ISO C 9x
1146 umount2 NEW: kernel
1147 unlockpt NEW: Unix98 PTY
1148 updwtmpx NEW: Unix98
1149 user2netname NEW: Secure RPC
1150 utmpxname NEW: Unix98
1151 versionsort NEW: GNU ext.
1152 versionsort64 NEW: GNU ext.
1153 waitid NEW: Unix98
1154 wcscasecmp NEW: GNU ext.
1155 wcsncasecmp NEW: GNU ext.
1156 wcsnlen NEW: GNU ext.
1157 wcstoimax NEW: ISO C 9x
1158 wcstoll NEW: ISO C 9x
1159 wcstoull NEW: ISO C 9x
1160 wcstoumax NEW: ISO C 9x
1161 wcswcs NEW: Unix98
1162 wordexp NEW: POSIX.2
1163 wordfree NEW: POSIX.2
1164 write_profiling REMOVED
1165 xdecrypt NEW: Secure RPC
1166 xdr_authdes_cred NEW: Secure RPC
1167 xdr_authdes_verf NEW: Secure RPC
1168 xdr_cryptkeyarg NEW: Secure RPC
1169 xdr_cryptkeyarg2 NEW: Secure RPC
1170 xdr_cryptkeyres NEW: Secure RPC
1171 xdr_getcredres NEW: Secure RPC
1172 xdr_key_netstarg NEW: Secure RPC
1173 xdr_key_netstres NEW: Secure RPC
1174 xdr_keybuf NEW: Secure RPC
1175 xdr_keystatus NEW: Secure RPC
1176 xdr_netnamestr NEW: Secure RPC
1177 xdr_sizeof NEW: Secure RPC
1178 xdr_unixcred NEW: sunrpc ext
1179 xencrypt NEW: Secure RPC
1180 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1181 \f
1182 Version 2.0.6
1184 * more bug fixes
1186 \f
1187 Version 2.0.5
1189 * more bug fixes
1191 * inet_ntoa is thread-safe
1193 * updwtmp is moved from libutil to libc
1195 * rewrite of cbrt function
1197 * update of timezone data
1198 \f
1199 Version 2.0.4
1201 * more bug fixes
1202 \f
1203 Version 2.0.3
1205 * more bug fixes
1206 \f
1207 Version 2.0.2
1209 * more bug fixes
1211 * add atoll function
1213 * fix complex problems in Berkeley DB code
1215 * fix math functions
1216 \f
1217 Version 2.0.1
1219 * fixed lots of header problems (especially Linux/GNU specific)
1221 * dynamic loader preserves all registers
1223 * Roland McGrath provided support for handling of auxiliary objects in
1224 the ELF dynamic loader.
1226 * support for parallel builds is improved
1227 \f
1228 Version 2.0
1230 * GNU extensions are no longer declared by default. To enable them you
1231 must define the macro `_GNU_SOURCE' in your program or compile with
1232 `-D_GNU_SOURCE'.
1234 * The library has changed from using GNU ld symbol aliases to using weak
1235 symbols where available. The ELF object file format supports weak
1236 symbols; GNU ld also supports weak symbols in the a.out format. (There
1237 is also now support for other GNU ld extensions in ELF. Use the
1238 `--with-elf' option to configure to indicate you have ELF, and
1239 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1240 of many files which contained only symbol aliases, reducing the size of
1241 the source and the compiled library; many other files were renamed to
1242 less cryptic names previously occupied by the symbol alias files.
1243 There is a new header file <elf.h> for programs which operate on
1244 files in the ELF format.
1246 * Converted to Autoconf version 2, so `configure' has more options.
1247 Run `configure --help' to see the details.
1249 * The library can now be configured to build profiling, highly-optimized
1250 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1251 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1252 `configure' enable building these extra libraries. The shared library is
1253 built by default when using both ELF and GNU ld. When shared libraries
1254 are enabled, the new library `-ldl' is available for arbitrary run-time
1255 loading of shared objects; its interface is defined in <dlfcn.h>. The
1256 new header file <link.h> gives access to the internals of the run-time
1257 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1258 application of same name on other systems and it provides information
1259 about dynamically linked binaries.
1261 * The C library now provides the run-time support code for profiling
1262 executables compiled with `-pg'. Programs can control the profiling code
1263 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1264 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1265 the support for this file format was contributed by David Mosberger-Tang.
1267 * The math code has been replaced with a math library based on fdlibm from
1268 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1269 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1270 functions. The math functions now reside in a separate library, so
1271 programs using them will need to use `-lm' their linking commands.
1273 * John C. Bowman contributed optimized ix87 assembler inline functions.
1275 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1276 mechanism similar to that found in Solaris 2. This is now used for the
1277 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1278 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1279 file controls what services are used for each individual database. This
1280 works by loading shared libraries with names specified in `nsswitch.conf',
1281 so service modules can be changed or added at any time without even
1282 relinking any program. Currently there are the file, db, and NIS based
1283 NSS services available.
1285 * The new functions `strtoq' and `strtouq' parse integer values from
1286 strings, like `strtol' and `strtoul', but they return `long long int' and
1287 `unsigned long long int' values, respectively (64-bit quantities).
1289 * The new functions `strtof' and `strtold' parse floating-point values from
1290 strings, like `strtod', but they return `float' and `long double' values,
1291 respectively (on some machines `double' and `long double' are the same).
1293 * Ulrich Drepper has contributed new implementations of the floating-point
1294 printing and reading code used in the `printf' family of functions and
1295 `strtod', `strtof', and `strtold'. These new functions are perfectly
1296 accurate, and much faster than the old ones.
1298 * The implementation of the POSIX locale model was completely rewritten by
1299 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1300 to compile the POSIX locale definition.
1302 * The former dummy implementations of the strcoll and strxfrm function are
1303 now replaced by fully functional code contributed by Ulrich Drepper. The
1304 collation information comes from the POSIX locale definitions.
1306 * The new header <langinfo.h> defines an interface for accessing
1307 various locale-dependent data (using the locale chosen with `setlocale').
1309 * Ulrich Drepper has contributed a new suite of functions for operation on
1310 wide-character and multibyte-character strings, in <wchar.h>;
1311 and classification and case conversion of wide characters, in <wctype.h>.
1312 These new functions are conforming to the ISO C, Amendement 1 specification.
1314 * There is now a second implementation of the standard I/O library available.
1315 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1316 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1318 * You can now use positional parameter specifications in format strings
1319 for the `printf' and `scanf' families of functions. For example,
1320 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1321 ``Number 6, Mr Jones''. This is mainly useful when providing different
1322 format strings for different languages, whose grammars may dictate
1323 different orderings of the values being printed. To support this
1324 feature, the interface for `register_printf_handler' has changed; see
1325 the header file <printf.h> for details.
1327 * The `printf' and `scanf' families of functions now understand a new
1328 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1329 to group numbers as indicated by the locale; for `scanf' and friends, this
1330 says to accept as valid only a number with all the proper grouping
1331 separators in the right places. In the default "C" locale, numbers are
1332 not grouped; but locales for specific countries will define the usual
1333 conventions (i.e. separate thousands with `,' in the US locale).
1335 * The pgrp functions have been regularized, slightly incompatibly but much
1336 less confusingly. The core functions are now `getpgid' and `setpgid',
1337 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1338 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1339 provided for compatibility. There is no longer an incompatible `getpgrp'
1340 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1342 * The new header file <fts.h> and suite of functions simplify programs that
1343 operate on directory trees. This code comes from 4.4 BSD.
1345 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1346 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1347 NSS scheme used in glibc.
1349 * There is a new malloc debugging hook `__memalign_hook'.
1351 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1352 `unsigned int' in <sys/types.h>. These are for compatibility only and
1353 their use is discouraged.
1355 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1356 done differently, so that it works even without GNU ld.
1358 * New function `euidaccess' checks allowed access to a file like `access',
1359 but using the effective IDs instead of the real IDs.
1361 * The time zone data files have been updated for the latest and greatest
1362 local time conventions of the countries of the world.
1364 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1365 see <dirent.h>.
1367 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1368 for formatting floating-point numbers. They are provided only for
1369 compatibility; new programs should use `sprintf' instead. There are
1370 also equivalent function for the `long double' floating-point type and
1371 all functions also exist in a reentrant form.
1373 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1374 functions for maintaining the login-record files (primarily of use to
1375 system programs such as `login'), and convenient functions for
1376 allocating and initializing a pseudo-terminal (pty) device.
1378 * Ulrich Drepper has contributed new support for System V style
1379 shared memory and IPC on systems that support it.
1381 * Ulrich Drepper has contributed several miscellaneous new functions found
1382 in System V: The `hsearch' family of functions provide an effective
1383 implementation of hash tables; `a64l' and `l64a' provide a very simple
1384 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1385 number generator.
1387 * Ulrich Drepper has contributed new reentrant counterparts for the
1388 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1390 * Ulrich Drepper has contributed new, highly-optimized versions of several
1391 string functions for the i486/Pentium family of processors.
1393 * Ulrich Drepper has updated the Linux-specific code, based largely
1394 on work done in Hongjiu Lu's version of GNU libc for Linux.
1395 The GNU library now supports Linux versions 2.0.10 and later,
1396 using the ELF object file format (i[3456]86-*-linux).
1398 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1400 * David Mosberger-Tang and Richard Henderson have ported the C library
1401 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1402 dynamic linking support for ELF/Alpha.
1404 * Richard Henderson contributed several Alpha optimized assembler function
1405 for arithmetic and string handling.
1407 * Ulrich Drepper has contributed a new set of message catalog functions to
1408 support multiple languages using the <libintl.h> interface, for use with
1409 his new package GNU gettext. Translation volunteers have contributed
1410 catalogs of the library's messages in Spanish, German, and Korean.
1412 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1413 program and the `catgets' function for reading the catalog files it
1414 creates. (The <libintl.h> interface is preferred; we include the
1415 <nl_types.h> interface using `catgets' only for source compatibility with
1416 programs already written to use it.)
1418 * New header file <values.h> gives SVID-compatible names for <limits.h>
1419 constants.
1421 * Various new macros, declarations, and small header files for compatibility
1422 with 4.4 BSD.
1424 * New function `group_member' is a convenient way to check if a process has
1425 a given effective group ID.
1427 * When using GCC 2.7 and later, the socket functions are now declared in a
1428 special way so that passing an argument of type `struct sockaddr_in *',
1429 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1430 `struct sockaddr *' type, does not generate a type-clash warning.
1432 * New function `error' declared in header file <error.h> is a convenient
1433 function for printing error messages and optionally exiting; this is the
1434 canonical function used in GNU programs. The new functions `err', `warn',
1435 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1436 doing the same thing.
1438 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1439 POSIX.2 `glob' function to do ~ and {...} expansion.
1441 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1442 `clearenv' which is used in POSIX.9 is also available.
1444 * New function `getsid' returns session ID number on systems that support it.
1446 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1447 files <db.h> and <mpool.h> provide a rich set of functions for several
1448 types of simple databases stored in memory and in files, and <ndbm.h> is
1449 an old `ndbm'-compatible interface using the `db' functions. Link with
1450 `-ldb' to get these functions.
1452 * New macro `strdupa' copies a string like `strdup', but uses local stack
1453 space from `alloca' instead of dynamic heap space from `malloc'.
1455 * New function `strnlen' is like `strlen' but searches only a given maximum
1456 number of characters for the null terminator. `stpncpy', `strndup' and
1457 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1458 function.
1460 * New function `statfs' in header <sys/statfs.h>.
1462 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1463 provide convenient functions for operating on blocks of null-terminated
1464 strings.
1466 * A new suite of functions in <utmp.h> handle all the details of reading
1467 and writing the utmp file.
1469 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1470 Thorsten Kukuk.
1472 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1473 completely POSIX compliant and also implemented the extended functionality
1474 to handle alternate digit representation and alternate era date formats.
1476 * Ulrich Drepper provided an implementation of the `strptime' function
1477 defined in XPG4.2 which transforms a string into a `struct tm' value.
1479 * Paul Eggert provided the tzselect shell script as part of the timezone
1480 code. The shell script makes it easy to select the correct timezone
1481 specification.
1483 * The implementation of the malloc family of functions is completely replaced
1484 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1485 The implementation uses the mmap function (if available) and it is
1486 optimized for the use in multi threaded programs.
1488 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1489 functions. This new functionality is usable by specifying a special
1490 salt string and it is compatible with implementation on *BSD systems.
1492 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1493 `getsubopt' to handle second level command line options, `bsd_signal'
1494 to access BSD style `signal' functionality, the obsolete `regexp' style
1495 expression matcher.
1497 * the `lchown' function is available on system which support this
1498 functionality.
1500 * The implementation of the shadow password handling function was contributed
1501 by Ulrich Drepper.
1503 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1505 * POSIX.1g support was added. The <sys/select.h> header is available,
1506 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1507 implementation of `getaddrinfo'.
1508 \f
1509 Version 1.09
1511 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1513 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1514 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1516 * The new function `daemon' from 4.4 BSD is useful for server programs that
1517 want to put themselves in the background.
1519 * Joel Sherrill has contributed support for several standalone boards that
1520 run without an operating system.
1522 * `printf', `scanf' and friends now accept a `q' type modifier for long
1523 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1525 * All of the code taken from BSD (notably most of the math and networking
1526 routines) has been updated from the BSD 4.4-Lite release.
1528 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1530 * The new functions `getdomainname' and `setdomainname' fetch or change the
1531 YP/NIS domain name. These are system calls which exist on systems which
1532 have YP (aka NIS).
1534 * The time zone data files have been updated for the latest international
1535 conventions.
1537 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1538 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1539 \f
1540 Version 1.08
1542 * The C library now includes support for Sun RPC, from Sun's free
1543 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1544 are included. (There is still no support for YP.)
1546 * Tom Quinn has contributed a port of the C library to SGI machines running
1547 Irix 4 (mips-sgi-irix4).
1549 * The new `lockf' function is a simplified interface to the locking
1550 facilities of `fcntl', included for compatibility.
1552 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1554 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1556 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1557 compatibility.
1559 * The error message printed by `assert' for a failed assertion now includes
1560 the name of the program (if using GNU ld) and the name of the calling
1561 function (with versions of GCC that support this).
1563 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1565 * The library now includes the <sys/mman.h> header file and memory
1566 management functions `mmap', `munmap', `mprotect', `msync', and
1567 `madvise', on systems that support those facilities.
1569 * The interface for `mcheck' has changed slightly: the function called to
1570 abort the program when an allocation inconsistency is detected now takes
1571 an argument that indicates the type of failure. The new function
1572 `mprobe' lets you request a consistency check for a particular block at
1573 any time (checks are normally done only when you call `free' or `realloc'
1574 on a block).
1576 * It is now possible to easily cross-compile the C library, building on one
1577 system a library to run on another machine and/or operating system. All
1578 you need to do is set the variable `HOST_CC' in `configparms' to the
1579 native compiler for programs to run on the machine you are building on (a
1580 few generator programs are used on Unix systems); set `CC' to the
1581 cross-compiler.
1583 * The new function `fexecve' (only implemented on the GNU system) executes
1584 a program file given a file descriptor already open on the file.
1585 \f
1586 Version 1.07
1588 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1589 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1591 * You can set the variable `libprefix' in `configparms' to specify a prefix
1592 to be prepended to installed library files; this makes it easy to install
1593 the GNU C library to be linked as `-lgnuc' or whatever.
1595 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1596 copies a limited number of characters from a string, and returns the
1597 address of the last character written.
1599 * You no longer need to check for whether the installed `stddef.h' is
1600 compatible with the GNU C library. configure now checks for you.
1602 * You can now define a per-stream `fileno' function to convert the
1603 stream's cookie into an integral file descriptor.
1605 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1606 allocates zero bytes of storage, and returns a unique pointer which
1607 you can pass to `realloc' or `free'. The behavior is undefined if
1608 you dereference this pointer.
1610 * The C library now runs on Sony NEWS m68k machines running either
1611 NewsOS 3 or NewsOS 4.
1613 * The new `syscall' function is a system-dependent primitive function
1614 for invoking system calls. It has the canonical behavior on Unix
1615 systems, including unreliable return values for some calls (such as
1616 `pipe', `fork' and `getppid').
1618 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1619 to `EAGAIN', which is the preferred name. On systems whose kernels
1620 use two distinct codes, the C library now translates EWOULDBLOCK to
1621 EAGAIN in every system call function.
1622 \f
1623 Version 1.06
1625 * The GNU C Library Reference Manual is now distributed with the library.
1626 `make dvi' will produce a DVI file of the printed manual.
1627 `make info' will produce Info files that you can read on line using C-h i
1628 in Emacs or the `info' program.
1629 Please send comments on the manual to bug-glibc-manual@gnu.org.
1631 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1633 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1635 * Jason Merrill has contributed a port to the Sequent Symmetry running
1636 Dynix version 3 (i386-sequent-dynix).
1638 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1639 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1641 * New function `memory_warnings' lets you arrange to get warnings when
1642 malloc is running out of memory to allocate, like Emacs gives you.
1644 * The C library now contains the relocating allocator used in Emacs 19 for
1645 its editing buffers. This allocator (ralloc) minimizes allocation
1646 overhead and fragmentation by moving allocated regions around whenever it
1647 needs to. You always refer to a ralloc'd region with a "handle" (a
1648 pointer to a pointer--an object of type `void **').
1650 * There is a new `printf' format: `%m' gives you the string corresponding
1651 to the error code in `errno'.
1653 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1654 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1655 pass, the `a' modifier says to fill in a `char **' you pass with a
1656 malloc'd string.
1658 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1659 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1660 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1662 * `mkstemp' is a traditional Unix function to atomically create and open a
1663 uniquely-named temporary file.
1664 \f
1665 Version 1.05
1667 * The standard location for the file that says what the local timezone is
1668 has changed again. It is now `/usr/local/etc/localtime' (or more
1669 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1671 * The distribution no longer contains any files with names longer than 14
1672 characters.
1674 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1675 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1677 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1678 \f
1679 Version 1.04
1681 * The configuration process has changed quite a bit. The `configure'
1682 script is now used just like the configuration scripts for other GNU
1683 packages. The `sysdeps' directory hierarchy is much rearranged.
1684 The file `INSTALL' explains the new scheme in detail.
1686 * The header files no longer need to be processed into ANSI C and
1687 traditional C versions. There is just one set of files to install, and
1688 it will work with ANSI or old C compilers (including `gcc -traditional').
1690 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1691 MIPS DECStation running Ultrix 4.
1693 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1694 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1695 made itself into a shared library.
1697 * Yet further improved support for the i386, running 4.3 BSD-like systems
1698 (such as Mach 3 with the Unix single-server), or System V.
1700 * New function `strncasecmp' to do case-insensitive string comparison
1701 with limited length.
1703 * New function `strsep' is a reentrant alternative to `strtok'.
1705 * New functions `scandir' and `alphasort' for searching directories.
1707 * New function `setenv' is a better interface to `putenv'.
1709 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1710 function for traversing a directory tree.
1712 * The GNU obstack package is now also part of the C library.
1713 The new function `open_obstack_stream' creates a stdio stream that
1714 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1715 formatted output directly to an obstack.
1717 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1718 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1720 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1722 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1723 things to your strings.
1725 * There are some new test programs: test-fseek, testmb, and testrand.
1727 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1728 These ports are not finished, but are a good starting place for really
1729 supporting those systems.
1731 * `/etc/localtime' is now the standard location for the file that says what
1732 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1733 This follows the general principle that `/etc' is the place for all local
1734 configuration files.
1736 * The C library header files now use `extern "C"' when used by the C++
1737 compiler, so the C library should now work with C++ code.
1739 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1740 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
1741 in <strings.h>.)
1743 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1744 function which uses the `merge sort' algorithm, and is said to be
1745 significantly faster than the old GNU `qsort' function. Merge sort is
1746 now the standard `qsort' function. The new algorithm can require a lot
1747 of temporary storage; so, the old sorting function is called when the
1748 required storage is not available.
1750 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1751 provides the Unix `crypt' function, plus some other entry points.
1753 * The code and header files taken from 4.4 BSD have been updated with the
1754 latest files released from Berkeley.
1755 \f
1756 ----------------------------------------------------------------------
1757 Copyright information:
1759 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1760 Free Software Foundation, Inc.
1762 Permission is granted to anyone to make or distribute verbatim copies
1763 of this document as received, in any medium, provided that the
1764 copyright notice and this permission notice are preserved,
1765 thus giving the recipient permission to redistribute in turn.
1767 Permission is granted to distribute modified versions
1768 of this document, or of portions of it,
1769 under the above conditions, provided also that they
1770 carry prominent notices stating who last changed them.
1771 \f
1772 Local variables:
1773 version-control: never
1774 End: