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1 GNU C Library NEWS -- history of user-visible changes. 2009-3-8
2 Copyright (C) 1992-2008, 2009 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sources.redhat.com/bugzilla/>
6 using `glibc' in the "product" field.
7 \f
8 Version 2.10
10 * New Linux interface: accept4
12 * Correct declarations of string function when used in C++ code. This
13 could lead to compile error for invalid C++ code.
15 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
16 now in POSIX.
18 * New POSIX 2008 interface: psiginfo
19 Implemented by Ulrich Drepper.
21 * New ISO C++1x interfaces: quick_exit, at_quick_exit
22 Implemented by Ulrich Drepper.
24 \f
25 Version 2.9
27 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
28 up at the same time. Implemented by Ulrich Drepper.
30 * TLS descriptors for LD and GD on x86 and x86-64.
31 Implemented by Alexandre Oliva.
33 * getaddrinfo now handles DCCP and UDPlite.
34 Implemented by Ulrich Drepper.
36 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
37 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
38 Implemented by Ulrich Drepper.
40 * New implementation of memmem, strstr, and strcasestr which is O(n).
41 Implemented by Eric Blake.
43 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
45 * Implement "e" option for popen to open file descriptor with the
46 close-on-exec flag set. Implemented by Ulrich Drepper.
48 * Implement "b" mode for fmemopen. In this mode writes writes don't
49 implicitly add a NUL byte and seeks from the end of the buffer really
50 use the buffer end, not the string length as the basis.
51 Implemented by Ulrich Drepper.
53 * Many functions, exported and internal, now atomically set the close-on-exec
54 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
56 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
57 Sinhala)
58 Implemented by Pravin Satpute.
60 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
61 \f
62 Version 2.8
64 * New locales: bo_CN, bo_IN, shs_CA.
66 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
68 * Sorting rules for some Indian languages (Devanagari and Gujarati).
69 Implemented by Pravin Satpute.
71 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
73 * nscd caches now all timeouts for DNS entries
74 Implemented by Ulrich Drepper.
76 * nscd is more efficient and wakes up less often.
77 Implemented by Ulrich Drepper.
79 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
80 vdprintf, and obstack_vprintf.
81 Implemented by Jakub Jelinek.
83 * Faster memset for x86-64.
84 Implemented by Harsha Jagasia and H.J. Lu.
86 * Faster memcpy on x86.
87 Implemented by Ulrich Drepper.
89 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
90 Implemented by Ulrich Drepper.
92 * Faster sqrt and sqrtf implemention for some PPC variants.
93 Implemented by Stephen Munroe.
94 \f
95 Version 2.7
97 * More checking functions: fread, fread_unlocked, open*, mq_open.
98 Implemented by Jakub Jelinek and Ulrich Drepper.
100 * Extend fortification to C++. Implemented by Jakub Jelinek.
102 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
103 by not recognizing 'a' as a modifier when those specs are requested.
104 Implemented by Jakub Jelinek.
106 * PPC optimizations to math and string functions.
107 Implemented by Steven Munroe.
109 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
110 options to be passed. Implemented by Ulrich Drepper.
112 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
114 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
115 Implemented by Ulrich Drepper.
117 * Handle private futexes in the NPTL implementation.
118 Implemented by Jakub Jelinek and Ulrich Drepper.
120 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
121 Implemented by Roland McGrath and Ulrich Drepper.
123 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
125 * SHA-256 and SHA-512 based password encryption.
126 Implemented by Ulrich Drepper.
128 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
129 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
130 yo_NG.
132 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
133 Implemented by Ulrich Drepper.
134 \f
135 Version 2.6
137 * New Linux interfaces: epoll_pwait, sched_getcpu.
139 * New generic interfaces: strerror_l.
141 * nscd can now cache the services database. Implemented by Ulrich Drepper.
143 \f
144 Version 2.5
146 * For Linux, the sorting of addresses returned by getaddrinfo now also
147 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
148 Implemented by Ulrich Drepper.
150 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
151 Implemented by Ulrich Drepper.
153 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
155 * New iconv module for MIK. Contributed by Alexander Shopov.
157 * For sites with broken group and/or passwd database, the auto-propagate
158 option of nscd can prevent creating ID lookup entries from the results
159 of a name lookup and vice versa. This usually is no problem but some
160 site might have problems with the default behavior.
161 Implemented by Ulrich Drepper.
163 * Iterating over entire database in NIS can be slow. With the
164 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
165 to trade time for memory. The entire database will be read at once.
166 Implemented by Ulrich Drepper.
168 * The interfaces introduced in RFC 3542 have been implemented by
169 Ulrich Drepper.
171 * Support for the new ELF hash table format was added by Ulrich Drepper.
173 * Support for priority inheritance mutexes added by Jakub Jelinek and
174 Ulrich Drepper.
176 * Support for priority protected mutexes added by Jakub Jelinek.
178 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
179 or_IN, csb_PL, fy_NL, sr_ME.
180 \f
181 Version 2.4
183 * More overflow detection functions.
185 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
186 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
188 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
189 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
190 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
191 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
192 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
193 by Masahide Washizawa.
195 * It is now possible to install audit libraries for the dynamic linker using
196 LD_AUDIT. Implemented by Ulrich Drepper.
198 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
199 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
200 For a libc and libpthread that works well on Linux 2.4 kernels, we
201 recommend using the stable 2.3 branch.
203 * The new function open_wmemstream acts like open_memstream,
204 but uses a wchar_t wide character buffer.
206 * The new function ppoll is an improved version of poll, similar to pselect.
208 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
209 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
210 renameat, unlinkat, linkat, symlinkat, readlinkat.
212 * New Linux kernel system calls: unshare,
213 inotify_init, inotify_add_watch, inotify_rm_watch.
215 * The euidaccess function is now also known by the alias eaccess,
216 for compatibility with some other systems.
218 * Timezone data updated to 2006b version.
219 \f
220 Version 2.3.6
222 * The following bugs are resolved with this release:
224 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
225 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
226 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
227 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
228 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
229 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
231 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
233 * As of this release, GCC 4 can be used to compile the C Library.
235 * Timezone data updated to 2005m version.
236 \f
237 Version 2.3.5
239 * The following bugs are resolved with this release:
241 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
242 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
243 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
244 777, 787, 821, 822, 823, 825
246 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
247 \f
248 Version 2.3.4
250 * Support for RFC 3678. Real implementations exist only for Linux so far.
251 Implemented by Ulrich Drepper.
253 * nscd can now cache entries persistently. Expiring entries are reloaded.
254 For speedups the cache can be shared in memory with client processes.
255 Implemented by Ulrich Drepper.
257 * nscd can now perform SELinux checks.
258 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
260 * getaddrinfo queries are now cached. Canonical name lookup is performed
261 efficiently.
262 Implemented by Ulrich Drepper.
264 * The nothrow function attribute is used when headers are used by gcc when
265 compiling C code. This can avoid significant amounts of exception
266 handling data.
268 * The malloc functions perform more error checking and are stricter when
269 it comes to reacting on errors. The default action is to terminate
270 the process after showing an error message. Implemented by Ulrich Drepper.
272 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
273 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
275 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
276 namespaces using the new function dlmopen(). This feature is of course,
277 like most other dynamic loading functionality, not available in statically
278 linked applications. Implemented by Ulrich Drepper.
280 * Low-overhead boundary checking variants of string and some stdio functions
281 were added. These are to be used in conjunction with a gcc patch by
282 Jakub Jelinek which adds calls to these functions if possible.
283 Implemented by Jakub Jelinek and Ulrich Drepper.
285 * Old code for several operating systems and machine architectures that
286 have not been in working condition in a long time have been removed from
287 the main source tree maintained by the GNU C Library's maintainers.
288 These files are now reside in the separate `ports' source module
289 that is usable as an add-on when building the library.
290 \f
291 Version 2.3.3
293 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
294 interrogate the dynamic linker, compatible with the Solaris interface.
296 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
297 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
299 * getifaddrs now uses the netlink interface on Linux to get its information.
300 Implemented by Thorsten Kukuk.
302 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
303 Implemented by Ulrich Drepper.
305 * support for non-executable stacks on x86 has been added. Changes mostly
306 by Roland McGrath.
308 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
309 and Ulrich Drepper.
311 * getaddrinfo now performs destination address selection according to
312 RFC 3484.
313 \f
314 Version 2.3.2
316 * Thread-safe interfaces for many functions that access locale data
317 were added in version 2.3, but these features were omitted from NEWS.
318 Many functions have variants with an `_l' suffix that take a `locale_t'
319 object as a parameter rather than consulting the current locale.
320 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
321 create and maintain `locale_t' objects. Additionally, the new function
322 `uselocale' sets "the current locale" (as used by functions not so
323 parameterized) set for an individual thread. These features were added
324 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
326 * The functions getresuid, getresgid, setresuid, and setresgid, which
327 have long been available on Linux, are now declared in <unistd.h>
328 and are now also available on the Hurd.
330 * ELF thread-local storage support (TLS) now works on x86-64.
332 * The new dynamic string token $LIB is expanded in shared library names.
333 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
335 * Aldy Hernandez contributed complete software floating point support for
336 PowerPC machines with no FPU.
338 * fexecve is implemented on Linux.
340 * The `btowc' function should work at least twice as fast due to
341 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
343 * With approriate thread add-ons cancelable functions are now implemented
344 in libc.so as well. No need to call the function in libpthread. This
345 change allowed to finally disable the incorrect and expensive handling
346 of weak definition in ld.so.
348 * Yet more PLT entries in libc.so have been removed. We finally arrived
349 at the bare minimum. Startup times improved appropriately.
351 * Support for the new Linux/x86 system call interface was added. The
352 AT_SYSINFO auxiliary vector entry is recognized and handled.
353 \f
354 Version 2.3
356 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
357 charsets.
359 * iconv (the program and the interface) now accepts empty names (excluding
360 options like //TRANSLIT) to mean "use charset of current locale".
362 * localedef can now transliterate characters in strings which are not in
363 the provided charmap. The information from the input locale is used.
365 * Prelinking support was added for ELF targets. This requires additional
366 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
368 * Read-only stdio streams now use mmap to speed up operation by eliminating
369 copying and buffer underflows. To use add 'm' to the mode string of
370 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
372 * The malloc functions were completely rewritten by Wolfram Gloger based
373 on Doug Lea's malloc-2.7.0.c.
375 * Isamu Hasegawa contributed a completely new and POSIX-conformant
376 implementation of regex.
378 * Bruno Haible upgraded the iconv and locale implementation to support
379 Unicode 3.2.
381 * Contents of the LC_* and LANG environment variables in the CEN style are
382 not recognized anymore. It never was used. Change by Ulrich Drepper.
384 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
385 thread-local storage (TLS) ABI on some platforms.
386 Changes by Ulrich Drepper. SH support by Kaz Kojima.
388 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
389 EUC-JISX0213, and TSCII.
391 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
392 BSD-compatible interface for getting all network interface addresses.
393 Implementation for IPv4 by Roland McGrath.
395 * Loading of locale data is faster due to the introduction of a locale
396 archive. Implemented by Roland McGrath and Ulrich Drepper.
398 * Startup times are significantly reduced by not using exported functions
399 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
400 and Ulrich Drepper.
402 * Steven Munroe contributed a port to PowerPC64/Linux.
403 \f
404 Version 2.2.6
406 * The Hurd now uses the GNU libio implementation of stdio rather than the
407 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
409 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
410 with the same behavior as the Linux system call of the same name.
411 \f
412 Version 2.2.5
414 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
415 128-bit long double format.
417 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
418 IBM1161, and IBM1162 charsets.
420 * Andreas Jaeger contributed a port to x86-64/Linux.
422 * Peter Bruin contributed a port to PowerPC/Hurd.
424 * libc functions using I/O streams now can handle wide-oriented streams
425 as well.
427 * optimizations in the dynamic linker. Binaries created by recent binutils
428 versions start up quicker due to reduced time spent on relocations.
430 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
431 \f
432 Version 2.2.4
434 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
435 asinh, atanh, j0 for the 128-bit long double format.
437 * Bruno Haible updated all the code handling Unicode in some form to
438 support Unicode 3.1.
440 * Speed of regex for single-byte locales is back to previous levels.
441 Patch by Isamu Hasegawa.
443 * Alpha, SPARC, and IA-64 now also using floating stacks.
445 * Startup time of internationalized applications greatly improved through
446 iconv cache. Use iconvconfig to generate the cache file.
447 Contributed by Ulrich Drepper.
449 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
450 severe performance problems. Patch by David Mosberger.
452 * The Hurd port got a lot more functionality like AIO, various stdio
453 extensions, etc. Mainly done by Roland McGrath.
455 * mtrace can now lookup symbols in shared libraries.
456 \f
457 Version 2.2.3
459 * Intel's IA-64 math library is largely integrated. It provides fast and
460 accurate implementatations for most basic and standard math functions
461 in float, double, and long double format.
463 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
464 and asin for the 96-bit long double format and asin, log, tan for the
465 128-bit long double format.
467 * The beginning of a last-bit accurate math library by IBM Haifa were added.
468 The basic double functions exist today. Contributed by Abraham Ziv
469 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
470 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
472 * An asynchronous name lookup library was added. The interface is designed
473 after POSIX AIO. The proposal was circulated beforehand to get comments.
474 No negative ones came in. Implemented by Ulrich Drepper.
476 * Port to S390/64bit contributed by Martin Schwidefsky
477 <schwidefsky@de.ibm.com>.
479 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
480 of functions for Linux/IA-64.
482 * The RPC code is now thread safe. Threads can now use the same service
483 of different services at the same time. Patch by Eric Norum
484 <eric.norum@usask.ca> with some help by Ulrich Drepper.
486 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
487 family of functions for Linux/S390.
489 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
490 of functions for Linux/x86.
492 * Port to Linux/CRIS contributed by Axis Communications.
493 \f
494 Version 2.2.2
496 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
497 we can now check for namespace violations and missing declarations. The
498 result is that almost all headers are now Unix-compliant (as defined in
499 the upcoming XPG6). The negative side is that some programs might need
500 corrections, too, if they depend on the incorrect form of the headers in
501 previous versions which defined too many symbols and included too many
502 other headers.
504 * regex now handles multibyte character sets correctly.
505 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
507 * iconv (the program) does now conform to the upcoming XPG6 and handles
508 charmaps. Instead of the charset names the path of charmaps can be
509 provided and the conversion happens based on this data.
510 Contributed by Ulrich Drepper.
512 * The locale program now provides detailed information about the installed
513 locales. While
515 locale -a
517 only lists the names of the supported locales
519 locale -a --verbose
521 provides details such as country, language, and codeset name.
522 Contributed by Ulrich Drepper.
523 \f
524 Version 2.2.1
526 * The gencat program now parses the input file according to the charset
527 selected by the LC_CTYPE category. This is important for stateful
528 character sets. To make generating catalogs easier there is a way
529 to overwrite the charset selected by the locale: before the first
530 message or $ quote line the catalog can contain a line like
532 $ codeset=ISO-8859-2
534 to select the charset (ISO-8859-2 in this case).
536 Implemented by Shinya Hanataka and Ulrich Drepper.
538 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
539 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
540 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
542 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
543 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
545 * The LANGUAGE environment variable is now ignored unless the locale is
546 changed from the default "C" locale.
548 * The usual bug fixes.
549 \f
550 Version 2.2
552 * Greg McGary added runtime support for bounds checking using gcc's
553 new -fbounded-pointers option. ix86 target is complete. PowerPC
554 is in progress.
556 * Thorsten Kukuk added secure mode support to nscd.
558 * The Berkeley db libraries have been removed.
560 Related, the nss_db module is now in a separate package since it
561 obviously requires a database library being available.
563 * Wide character I/O streams implemented by Ulrich Drepper.
565 * Functions from the extended socket API added by Ulrich Drepper.
567 * Functions feenableexcept and fedisableexcept to control the
568 behaviour of individual exceptions have been added by Andreas Jaeger.
570 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
572 * The resolver code has been updated from bind 8.2.3-T5B which supports
573 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
574 and Mark Kettenis.
576 This change could in some situations effect backward compatibility. Since
577 now `_res' is a thread-local instead of a global variable, modifying it
578 in one thread does not have any effect in other threads.
580 The resolver library was also extended to allow IPv6 as the transport
581 protocol for the requests. This work was done by Stig Venaas.
583 * Compatibility code for K&R C compilers has been removed from the
584 header files. A ISO C compiler is needed to use the library
585 (conforming to either C89 or C99 standard).
587 * Complete rewrite of the localedef program to support multibyte character
588 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
589 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
590 Implemented by Ulrich Drepper.
592 Bruno Haible significantly improved the generation and use of the data
593 structures for the wide character tables.
595 * Plural handling in gettext implemented by Ulrich Drepper.
597 * The utmp daemon has been removed.
599 * The port to MIPS-Linux has been finished by Andreas Jaeger.
601 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
602 and Yutaka Niibe.
604 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
606 * POSIX barriers implemented by Kaz Kylheku.
608 * POSIX spawn function family implemented by Ulrich Drepper.
610 * POSIX spinlocks are now available.
612 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
614 * the configure option --enable-kernel=X.Y.Z allows to strip out
615 compatibility for kernel versions before X.Y.Z. This is currently only
616 implemented for Linux.
618 * the sockaddr_in6 structure changed. The IPv6 working group added a new
619 field sin6_scope_id. This means that all programs using IPv6 should be
620 recompiled. Don't expect binary compatibility with previous glibc
621 versions.
623 * various conversion modules for IBM character sets contributed by
624 Masahide Washizawa.
626 * IA-64 port by Jes Sorensen and HJ Lu.
628 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
629 Compiling the GNU C Library for Linux/ia64
630 ******************************************
632 Please refer to the file INSTALL in the same directory as you found
633 this file for general information about configuring and compiling
634 glibc.
636 For general inquiries about glibc under Linux/ia64 please use the
637 following mailing list linux-ia64@linuxia64.org or one of the relevant
638 glibc mailing lists.
640 Recommended Tools for Compilation
641 =================================
643 In order for glibc-2.2 to build correctly on the ia64 you need at
644 least the following versions of the GNU tools (the :
646 * The Cygnus toolchain snapshot for the ia64 as of August 4
647 including the provided set of patches. It is however recommend
648 you use the October 24 toolchain snapshot or a more recent version.
650 OR alternatively you can try the following (the Cygnus toolchain is
651 the recommended solution):
653 * GCC and binutils, GAS and GNU LD out of CVS from
654 sources.redhat.com as of August 28, 2000 or later. The CVS tree
655 may require special patches to work properly on the ia64.
657 Configuring and compiling GNU Libc for Linux/ia64
658 =================================================
660 The library requires Linux kernel version 2.4.0-test4-000728 or
661 later to funtion properly. Besides that it support for debug libraries
662 is currently untested. Hence the following options
663 are required for configuring the library:
665 --disable-debug --enable-kernel=2.4.0
667 It is also important that you make sure the library picks up the
668 appropriate kernel header files, if you do not have recent enough
669 kernel headers in /usr/src/linux/include, you should use the
670 --with-headers=<path> option to specify the location.
672 As an example I personally use the following options to configure
673 the library:
675 --disable-debug
676 --disable-cvs
677 --enable-kernel=2.4.0
678 --host=ia64-linux
679 --enable-add-ons=yes
680 --prefix=/usr
681 --with-headers=/home/jes/linux/include
684 Good luck
686 Jes Sorensen <jes@linuxcare.com>,
687 November 14th, 2000
688 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
689 \f
690 Version 2.1.3
692 * bug fixes
694 \f
695 Version 2.1.2
697 * bug fixes
699 \f
700 Version 2.1.1
702 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
704 * New xdr functions are added; some rpc functions are now 64bit clean.
706 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
708 * Fixed known incompatibilities with glibc 2.0.
710 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
712 * Optimized a number of functions (especially the ELF dynamic loader).
714 * Update timezone data files.
716 * lots of charmaps corrections
718 * some new locale definitions and charmaps
720 \f
721 Version 2.1
723 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
724 conform to POSIX member type requirements. Symbol versions have been
725 adjusted as needed within the library, and for direct use by applications,
726 but there is potential for problems if third-party libraries use
727 struct timeval as part of their interface. This does not present
728 a problem for X and other "essential" system libraries.
730 * An additional locale model to support C++ Standard Library locale
731 model and probably more was implemented by Ulrich Drepper.
733 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
734 symbol level.
736 * Miles Bader provided the `argp' function family to support hierachical
737 command line argument parsing, layered on top of getopt.
739 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
741 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
742 numbers.
744 * scanf recognizes the %a and %A format for scanning floating point numbers.
746 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
747 information and interfaces for the available integer types.
749 * about 130 new math functions were added to implement the ISO C9x math
750 library.
752 * the new header <complex.h> contains definitions of the complex math
753 functions from ISO C 9X.
755 * the new header <tgmath.h> defines generic macros to use complex or
756 real valued functions.
758 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
760 * Andreas Jaeger provided a test suite for the math library.
762 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
764 * Ulrich Drepper added character set conversion functions (iconv).
766 * Optimized string functions have been added.
768 * The localedata addon is now part of glibc.
770 * An implementation of profiling shared libraries was added by Ulrich Drepper.
772 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
773 daemon for NSS (nscd).
775 Missing a better place here are some numbers on improvements. Under
776 Linux 2.1.125 un-tar-ing the kernel sources takes
778 user system wall
780 using local files 12.19s 6.88s 22.91s
782 using NIS 13.92s 8.91s 26.34s
784 using NIS & nscd 10.37s 7.34s 25.30s
786 using NIS+ 27.57s 30.37s 640.46s
788 using NIS+ & nscd 10.25s 7.83s 26.51s
790 using NIS & old nscd [1] 13.83s 8.32s 29.60s
792 Keep in mind that non-namelookup related operations dominate above times.
793 It was just a common complain that using NIS+ unpacking the kernel is
794 horribly slow.
796 [1] The old nscd implementation is not available anymore since it was
797 distributed with glibc up to version 2.0.98 and thus is now replaced.
799 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
801 * Mark Kettenis provided a Hesiod NSS module.
803 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
804 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
806 * rcmd can now handle netgroups (Dick Streefland).
808 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
809 Bambrough.
811 * Support for the IPv6 protocol has been added to the socket API, as per the
812 latest draft standards.
814 * Support for Linux 2.2 has been added.
816 * Interface changes relative to the latest 2.0.x release:
817 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
818 addseverity NEW: Unix98
819 alphasort64 NEW: LFS
820 argp_err_exit_status NEW: argp, GNU ext
821 argp_error NEW: argp, GNU ext
822 argp_failure NEW: argp, GNU ext
823 argp_help NEW: argp, GNU ext
824 argp_parse NEW: argp, GNU ext
825 argp_program_bug_address NEW: argp, GNU ext
826 argp_program_version NEW: argp, GNU ext
827 argp_program_version_hook NEW: argp, GNU ext
828 argp_state_help NEW: argp, GNU ext
829 argp_usage NEW: argp, GNU ext
830 authdes_create NEW: Secure RPC
831 authdes_getucred NEW: Secure RPC
832 authdes_pk_create NEW: Secure RPC
833 backtrace NEW: GNU ext.
834 backtrace_symbols NEW: GNU ext.
835 backtrace_symbols_fd NEW: GNU ext.
836 cacos NEW: ISO C 9x
837 cacosf NEW: ISO C 9x
838 cacosh NEW: ISO C 9x
839 cacoshf NEW: ISO C 9x
840 cacoshl NEW: ISO C 9x
841 cacosl NEW: ISO C 9x
842 capget NEW: kernel
843 capset NEW: kernel
844 carg NEW: ISO C 9x
845 cargf NEW: ISO C 9x
846 cargl NEW: ISO C 9x
847 casin NEW: ISO C 9x
848 casinf NEW: ISO C 9x
849 casinh NEW: ISO C 9x
850 casinhf NEW: ISO C 9x
851 casinhl NEW: ISO C 9x
852 casinl NEW: ISO C 9x
853 catan NEW: ISO C 9x
854 catanf NEW: ISO C 9x
855 catanh NEW: ISO C 9x
856 catanhf NEW: ISO C 9x
857 catanhl NEW: ISO C 9x
858 catanl NEW: ISO C 9x
859 cbc_crypt NEW: Secure RPC
860 ccos NEW: ISO C 9x
861 ccosf NEW: ISO C 9x
862 ccosh NEW: ISO C 9x
863 ccoshf NEW: ISO C 9x
864 ccoshl NEW: ISO C 9x
865 ccosl NEW: ISO C 9x
866 cexp NEW: ISO C 9x
867 cexpf NEW: ISO C 9x
868 cexpl NEW: ISO C 9x
869 cimag NEW: ISO C 9x
870 cimagf NEW: ISO C 9x
871 cimagl NEW: ISO C 9x
872 clearerr_locked REMOVED
873 clntunix_create NEW: sunrpc ext
874 clog NEW: ISO C 9x
875 clog10 NEW: ISO C 9x
876 clog10f NEW: ISO C 9x
877 clog10l NEW: ISO C 9x
878 clogf NEW: ISO C 9x
879 clogl NEW: ISO C 9x
880 conj NEW: ISO C 9x
881 conjf NEW: ISO C 9x
882 conjl NEW: ISO C 9x
883 cpow NEW: ISO C 9x
884 cpowf NEW: ISO C 9x
885 cpowl NEW: ISO C 9x
886 cproj NEW: ISO C 9x
887 cprojf NEW: ISO C 9x
888 cprojl NEW: ISO C 9x
889 creal NEW: ISO C 9x
890 crealf NEW: ISO C 9x
891 creall NEW: ISO C 9x
892 creat64 NEW: LFS
893 csin NEW: ISO C 9x
894 csinf NEW: ISO C 9x
895 csinh NEW: ISO C 9x
896 csinhf NEW: ISO C 9x
897 csinhl NEW: ISO C 9x
898 csinl NEW: ISO C 9x
899 csqrt NEW: ISO C 9x
900 csqrtf NEW: ISO C 9x
901 csqrtl NEW: ISO C 9x
902 ctan NEW: ISO C 9x
903 ctanf NEW: ISO C 9x
904 ctanh NEW: ISO C 9x
905 ctanhf NEW: ISO C 9x
906 ctanhl NEW: ISO C 9x
907 ctanl NEW: ISO C 9x
908 des_setparity NEW: Secure RPC
909 ecb_crypt NEW: Secure RPC
910 endutxent NEW: Unix98
911 exp10 NEW: ISO C 9x
912 exp10f NEW: ISO C 9x
913 exp10l NEW: ISO C 9x
914 exp2 NEW: ISO C 9x
915 exp2f NEW: ISO C 9x
916 exp2l NEW: ISO C 9x
917 fattach NEW: STREAMS
918 fdetach NEW: STREAMS
919 fdim NEW: ISO C 9x
920 fdimf NEW: ISO C 9x
921 fdiml NEW: ISO C 9x
922 feclearexcept NEW: ISO C 9x
923 fegetenv NEW: ISO C 9x
924 fegetexceptflag NEW: ISO C 9x
925 fegetround NEW: ISO C 9x
926 feholdexcept NEW: ISO C 9x
927 feof_locked REMOVED
928 feraiseexcept NEW: ISO C 9x
929 ferror_locked REMOVED
930 fesetenv NEW: ISO C 9x
931 fesetexceptflag NEW: ISO C 9x
932 fesetround NEW: ISO C 9x
933 fetestexcept NEW: ISO C 9x
934 feupdateenv NEW: ISO C 9x
935 fflush_locked REMOVED
936 ffsl NEW: GNU ext.
937 ffsll NEW: GNU ext.
938 fgetpos64 NEW: LFS
939 fgets_unlocked NEW: GNU ext.
940 fileno_locked REMOVED
941 fma NEW: ISO C 9x
942 fmaf NEW: ISO C 9x
943 fmal NEW: ISO C 9x
944 fmax NEW: ISO C 9x
945 fmaxf NEW: ISO C 9x
946 fmaxl NEW: ISO C 9x
947 fmin NEW: ISO C 9x
948 fminf NEW: ISO C 9x
949 fminl NEW: ISO C 9x
950 fmtmsg NEW: Unix98
951 fopen64 NEW: LFS
952 fputc_locked REMOVED
953 fputs_unlocked NEW: GNU ext.
954 fread_unlocked NEW: GNU ext.
955 freopen64 NEW: LFS
956 fseeko NEW: Unix98
957 fsetpos64 NEW: LFS
958 fstatfs64 NEW: LFS
959 fstatvfs NEW: Unix98
960 fstatvfs64 NEW: LFS
961 ftello NEW: Unix98
962 ftello64 NEW: LFS
963 ftruncate64 NEW: LFS
964 ftw64 NEW: LFS
965 fwrite_unlocked NEW: GNU ext.
966 gai_strerror NEW: IPv6
967 gamma_r REMOVED
968 gammaf_r REMOVED
969 gammal_r REMOVED
970 getchar_locked REMOVED
971 getdate NEW: Unix98
972 getdate_err NEW: Unix98
973 getdate_r NEW: GNU ext.
974 getmsg NEW: STREAMS
975 getnameinfo NEW: IPv6
976 getnetname NEW: Secure RPC
977 getpmsg NEW: STREAMS
978 getpt NEW: Unix98 PTY
979 getrlimit64 NEW: LFS
980 getutxent NEW: Unix98
981 getutxid NEW: Unix98
982 getutxline NEW: Unix98
983 glob64 NEW: GNU ext.
984 globfree64 NEW: GNU ext.
985 gnu_get_libc_release NEW: GNU ext.
986 gnu_get_libc_version NEW: GNU ext.
987 grantpt NEW: Unix98 PTY
988 host2netname NEW: Secure RPC
989 iconv NEW: iconv
990 iconv_close NEW: iconv
991 iconv_open NEW: iconv
992 if_freenameindex NEW: IPv6
993 if_indextoname NEW: IPv6
994 if_nameindex NEW: IPv6
995 if_nametoindex NEW: IPv6
996 in6addr_any NEW: IPv6
997 in6addr_loopback NEW: IPv6
998 inet6_isipv4mapped NEW: IPv6
999 isastream NEW: STREAMS
1000 iswblank NEW: GNU ext.
1001 key_decryptsession NEW: Secure RPC
1002 key_decryptsession_pk NEW: Secure RPC
1003 key_encryptsession NEW: Secure RPC
1004 key_encryptsession_pk NEW: Secure RPC
1005 key_gendes NEW: Secure RPC
1006 key_get_conv NEW: Secure RPC
1007 key_secretkey_is_set NEW: Secure RPC
1008 key_setnet NEW: Secure RPC
1009 key_setsecret NEW: Secure RPC
1010 llrint NEW: ISO C 9x
1011 llrintf NEW: ISO C 9x
1012 llrintl NEW: ISO C 9x
1013 llround NEW: ISO C 9x
1014 llroundf NEW: ISO C 9x
1015 llroundl NEW: ISO C 9x
1016 log2 NEW: ISO C 9x
1017 log2f NEW: ISO C 9x
1018 log2l NEW: ISO C 9x
1019 lrint NEW: ISO C 9x
1020 lrintf NEW: ISO C 9x
1021 lrintl NEW: ISO C 9x
1022 lround NEW: ISO C 9x
1023 lroundf NEW: ISO C 9x
1024 lroundl NEW: ISO C 9x
1025 lseek64 NEW: LFS
1026 makecontext NEW: Unix98
1027 mempcpy NEW: GNU ext.
1028 mmap64 NEW: LFS
1029 moncontrol REMOVED
1030 modify_ldt NEW: kernel
1031 nan NEW: ISO C 9x
1032 nanf NEW: ISO C 9x
1033 nanl NEW: ISO C 9x
1034 nearbyint NEW: ISO C 9x
1035 nearbyintf NEW: ISO C 9x
1036 nearbyintl NEW: ISO C 9x
1037 netname2host NEW: Secure RPC
1038 netname2user NEW: Secure RPC
1039 nexttoward NEW: ISO C 9x
1040 nexttowardf NEW: ISO C 9x
1041 nexttowardl NEW: ISO C 9x
1042 nftw NEW: Unix98
1043 nftw64 NEW: LFS
1044 open64 NEW: LFS
1045 passwd2des NEW: Secure RPC
1046 pow10 NEW: GNU ext.
1047 pow10f NEW: GNU ext.
1048 pow10l NEW: GNU ext.
1049 pread NEW: Unix98
1050 pread64 NEW: LFS
1051 printf_size NEW: GNU ext.
1052 printf_size_info NEW: GNU ext.
1053 profil_counter REMOVED
1054 pthread_mutexattr_getkind_np REPLACED
1055 pthread_mutexattr_setkind_np REPLACED
1056 ptsname NEW: Unix98 PTY
1057 ptsname_r NEW: Unix98 PTY
1058 putc_locked REMOVED
1059 putchar_locked REMOVED
1060 putgrent NEW: GNU ext.
1061 putmsg NEW: STREAMS
1062 putpmsg NEW: STREAMS
1063 pututxline NEW: Unix98
1064 pwrite NEW: Unix98
1065 pwrite64 NEW: LFS
1066 readdir64 NEW: LFS
1067 readdir64_r NEW: LFS
1068 remquo NEW: ISO C 9x
1069 remquof NEW: ISO C 9x
1070 remquol NEW: ISO C 9x
1071 round NEW: ISO C 9x
1072 roundf NEW: ISO C 9x
1073 roundl NEW: ISO C 9x
1074 rtime NEW: GNU ext.
1075 scalbln NEW: ISO C 9x
1076 scalblnf NEW: ISO C 9x
1077 scalblnl NEW: ISO C 9x
1078 scandir64 NEW: LFS
1079 sendfile NEW: kernel
1080 setcontext NEW: Unix98
1081 setrlimit64 NEW: LFS
1082 setutxent NEW: Unix98
1083 sighold NEW: Unix98
1084 sigignore NEW: Unix98
1085 sigqueue NEW: POSIX.1b
1086 sigrelse NEW: Unix98
1087 sigset NEW: POSIX.1b
1088 sigtimedwait NEW: POSIX.1b
1089 sigwaitinfo NEW: POSIX.1b
1090 sincos NEW: GNU ext.
1091 sincosf NEW: GNU ext.
1092 sincosl NEW: GNU ext.
1093 statfs64 NEW: LFS
1094 statvfs NEW: Unix98
1095 statvfs64 NEW: LFS
1096 strcasestr NEW: GNU ext.
1097 strtoimax NEW: ISO C 9x
1098 strtoumax NEW: ISO C 9x
1099 strverscmp NEW: GNU ext.
1100 svcauthdes_stats NEW: Secure RPC
1101 svcunix_create NEW: sunrpc etx
1102 svcunixfd_create NEW: sunrpc ext
1103 swapcontext NEW: Unix98
1104 tcgetsid NEW: Unix98 PTY
1105 tdestroy NEW: GNU ext.
1106 tgamma NEW: ISO C 9x
1107 tgammaf NEW: ISO C 9x
1108 tgammal NEW: ISO C 9x
1109 tmpfile64 NEW: LFS
1110 trunc NEW: ISO C 9x
1111 truncate64 NEW: LFS
1112 truncf NEW: ISO C 9x
1113 truncl NEW: ISO C 9x
1114 umount2 NEW: kernel
1115 unlockpt NEW: Unix98 PTY
1116 updwtmpx NEW: Unix98
1117 user2netname NEW: Secure RPC
1118 utmpxname NEW: Unix98
1119 versionsort NEW: GNU ext.
1120 versionsort64 NEW: GNU ext.
1121 waitid NEW: Unix98
1122 wcscasecmp NEW: GNU ext.
1123 wcsncasecmp NEW: GNU ext.
1124 wcsnlen NEW: GNU ext.
1125 wcstoimax NEW: ISO C 9x
1126 wcstoll NEW: ISO C 9x
1127 wcstoull NEW: ISO C 9x
1128 wcstoumax NEW: ISO C 9x
1129 wcswcs NEW: Unix98
1130 wordexp NEW: POSIX.2
1131 wordfree NEW: POSIX.2
1132 write_profiling REMOVED
1133 xdecrypt NEW: Secure RPC
1134 xdr_authdes_cred NEW: Secure RPC
1135 xdr_authdes_verf NEW: Secure RPC
1136 xdr_cryptkeyarg NEW: Secure RPC
1137 xdr_cryptkeyarg2 NEW: Secure RPC
1138 xdr_cryptkeyres NEW: Secure RPC
1139 xdr_getcredres NEW: Secure RPC
1140 xdr_key_netstarg NEW: Secure RPC
1141 xdr_key_netstres NEW: Secure RPC
1142 xdr_keybuf NEW: Secure RPC
1143 xdr_keystatus NEW: Secure RPC
1144 xdr_netnamestr NEW: Secure RPC
1145 xdr_sizeof NEW: Secure RPC
1146 xdr_unixcred NEW: sunrpc ext
1147 xencrypt NEW: Secure RPC
1148 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1149 \f
1150 Version 2.0.6
1152 * more bug fixes
1154 \f
1155 Version 2.0.5
1157 * more bug fixes
1159 * inet_ntoa is thread-safe
1161 * updwtmp is moved from libutil to libc
1163 * rewrite of cbrt function
1165 * update of timezone data
1166 \f
1167 Version 2.0.4
1169 * more bug fixes
1170 \f
1171 Version 2.0.3
1173 * more bug fixes
1174 \f
1175 Version 2.0.2
1177 * more bug fixes
1179 * add atoll function
1181 * fix complex problems in Berkeley DB code
1183 * fix math functions
1184 \f
1185 Version 2.0.1
1187 * fixed lots of header problems (especially Linux/GNU specific)
1189 * dynamic loader preserves all registers
1191 * Roland McGrath provided support for handling of auxiliary objects in
1192 the ELF dynamic loader.
1194 * support for parallel builds is improved
1195 \f
1196 Version 2.0
1198 * GNU extensions are no longer declared by default. To enable them you
1199 must define the macro `_GNU_SOURCE' in your program or compile with
1200 `-D_GNU_SOURCE'.
1202 * The library has changed from using GNU ld symbol aliases to using weak
1203 symbols where available. The ELF object file format supports weak
1204 symbols; GNU ld also supports weak symbols in the a.out format. (There
1205 is also now support for other GNU ld extensions in ELF. Use the
1206 `--with-elf' option to configure to indicate you have ELF, and
1207 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1208 of many files which contained only symbol aliases, reducing the size of
1209 the source and the compiled library; many other files were renamed to
1210 less cryptic names previously occupied by the symbol alias files.
1211 There is a new header file <elf.h> for programs which operate on
1212 files in the ELF format.
1214 * Converted to Autoconf version 2, so `configure' has more options.
1215 Run `configure --help' to see the details.
1217 * The library can now be configured to build profiling, highly-optimized
1218 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1219 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1220 `configure' enable building these extra libraries. The shared library is
1221 built by default when using both ELF and GNU ld. When shared libraries
1222 are enabled, the new library `-ldl' is available for arbitrary run-time
1223 loading of shared objects; its interface is defined in <dlfcn.h>. The
1224 new header file <link.h> gives access to the internals of the run-time
1225 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1226 application of same name on other systems and it provides information
1227 about dynamically linked binaries.
1229 * The C library now provides the run-time support code for profiling
1230 executables compiled with `-pg'. Programs can control the profiling code
1231 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1232 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1233 the support for this file format was contributed by David Mosberger-Tang.
1235 * The math code has been replaced with a math library based on fdlibm from
1236 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1237 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1238 functions. The math functions now reside in a separate library, so
1239 programs using them will need to use `-lm' their linking commands.
1241 * John C. Bowman contributed optimized ix87 assembler inline functions.
1243 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1244 mechanism similar to that found in Solaris 2. This is now used for the
1245 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1246 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1247 file controls what services are used for each individual database. This
1248 works by loading shared libraries with names specified in `nsswitch.conf',
1249 so service modules can be changed or added at any time without even
1250 relinking any program. Currently there are the file, db, and NIS based
1251 NSS services available.
1253 * The new functions `strtoq' and `strtouq' parse integer values from
1254 strings, like `strtol' and `strtoul', but they return `long long int' and
1255 `unsigned long long int' values, respectively (64-bit quantities).
1257 * The new functions `strtof' and `strtold' parse floating-point values from
1258 strings, like `strtod', but they return `float' and `long double' values,
1259 respectively (on some machines `double' and `long double' are the same).
1261 * Ulrich Drepper has contributed new implementations of the floating-point
1262 printing and reading code used in the `printf' family of functions and
1263 `strtod', `strtof', and `strtold'. These new functions are perfectly
1264 accurate, and much faster than the old ones.
1266 * The implementation of the POSIX locale model was completely rewritten by
1267 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1268 to compile the POSIX locale definition.
1270 * The former dummy implementations of the strcoll and strxfrm function are
1271 now replaced by fully functional code contributed by Ulrich Drepper. The
1272 collation information comes from the POSIX locale definitions.
1274 * The new header <langinfo.h> defines an interface for accessing
1275 various locale-dependent data (using the locale chosen with `setlocale').
1277 * Ulrich Drepper has contributed a new suite of functions for operation on
1278 wide-character and multibyte-character strings, in <wchar.h>;
1279 and classification and case conversion of wide characters, in <wctype.h>.
1280 These new functions are conforming to the ISO C, Amendement 1 specification.
1282 * There is now a second implementation of the standard I/O library available.
1283 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1284 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1286 * You can now use positional parameter specifications in format strings
1287 for the `printf' and `scanf' families of functions. For example,
1288 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1289 ``Number 6, Mr Jones''. This is mainly useful when providing different
1290 format strings for different languages, whose grammars may dictate
1291 different orderings of the values being printed. To support this
1292 feature, the interface for `register_printf_handler' has changed; see
1293 the header file <printf.h> for details.
1295 * The `printf' and `scanf' families of functions now understand a new
1296 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1297 to group numbers as indicated by the locale; for `scanf' and friends, this
1298 says to accept as valid only a number with all the proper grouping
1299 separators in the right places. In the default "C" locale, numbers are
1300 not grouped; but locales for specific countries will define the usual
1301 conventions (i.e. separate thousands with `,' in the US locale).
1303 * The pgrp functions have been regularized, slightly incompatibly but much
1304 less confusingly. The core functions are now `getpgid' and `setpgid',
1305 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1306 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1307 provided for compatibility. There is no longer an incompatible `getpgrp'
1308 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1310 * The new header file <fts.h> and suite of functions simplify programs that
1311 operate on directory trees. This code comes from 4.4 BSD.
1313 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1314 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1315 NSS scheme used in glibc.
1317 * There is a new malloc debugging hook `__memalign_hook'.
1319 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1320 `unsigned int' in <sys/types.h>. These are for compatibility only and
1321 their use is discouraged.
1323 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1324 done differently, so that it works even without GNU ld.
1326 * New function `euidaccess' checks allowed access to a file like `access',
1327 but using the effective IDs instead of the real IDs.
1329 * The time zone data files have been updated for the latest and greatest
1330 local time conventions of the countries of the world.
1332 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1333 see <dirent.h>.
1335 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1336 for formatting floating-point numbers. They are provided only for
1337 compatibility; new programs should use `sprintf' instead. There are
1338 also equivalent function for the `long double' floating-point type and
1339 all functions also exist in a reentrant form.
1341 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1342 functions for maintaining the login-record files (primarily of use to
1343 system programs such as `login'), and convenient functions for
1344 allocating and initializing a pseudo-terminal (pty) device.
1346 * Ulrich Drepper has contributed new support for System V style
1347 shared memory and IPC on systems that support it.
1349 * Ulrich Drepper has contributed several miscellaneous new functions found
1350 in System V: The `hsearch' family of functions provide an effective
1351 implementation of hash tables; `a64l' and `l64a' provide a very simple
1352 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1353 number generator.
1355 * Ulrich Drepper has contributed new reentrant counterparts for the
1356 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1358 * Ulrich Drepper has contributed new, highly-optimized versions of several
1359 string functions for the i486/Pentium family of processors.
1361 * Ulrich Drepper has updated the Linux-specific code, based largely
1362 on work done in Hongjiu Lu's version of GNU libc for Linux.
1363 The GNU library now supports Linux versions 2.0.10 and later,
1364 using the ELF object file format (i[3456]86-*-linux).
1366 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1368 * David Mosberger-Tang and Richard Henderson have ported the C library
1369 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1370 dynamic linking support for ELF/Alpha.
1372 * Richard Henderson contributed several Alpha optimized assembler function
1373 for arithmetic and string handling.
1375 * Ulrich Drepper has contributed a new set of message catalog functions to
1376 support multiple languages using the <libintl.h> interface, for use with
1377 his new package GNU gettext. Translation volunteers have contributed
1378 catalogs of the library's messages in Spanish, German, and Korean.
1380 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1381 program and the `catgets' function for reading the catalog files it
1382 creates. (The <libintl.h> interface is preferred; we include the
1383 <nl_types.h> interface using `catgets' only for source compatibility with
1384 programs already written to use it.)
1386 * New header file <values.h> gives SVID-compatible names for <limits.h>
1387 constants.
1389 * Various new macros, declarations, and small header files for compatibility
1390 with 4.4 BSD.
1392 * New function `group_member' is a convenient way to check if a process has
1393 a given effective group ID.
1395 * When using GCC 2.7 and later, the socket functions are now declared in a
1396 special way so that passing an argument of type `struct sockaddr_in *',
1397 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1398 `struct sockaddr *' type, does not generate a type-clash warning.
1400 * New function `error' declared in header file <error.h> is a convenient
1401 function for printing error messages and optionally exiting; this is the
1402 canonical function used in GNU programs. The new functions `err', `warn',
1403 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1404 doing the same thing.
1406 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1407 POSIX.2 `glob' function to do ~ and {...} expansion.
1409 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1410 `clearenv' which is used in POSIX.9 is also available.
1412 * New function `getsid' returns session ID number on systems that support it.
1414 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1415 files <db.h> and <mpool.h> provide a rich set of functions for several
1416 types of simple databases stored in memory and in files, and <ndbm.h> is
1417 an old `ndbm'-compatible interface using the `db' functions. Link with
1418 `-ldb' to get these functions.
1420 * New macro `strdupa' copies a string like `strdup', but uses local stack
1421 space from `alloca' instead of dynamic heap space from `malloc'.
1423 * New function `strnlen' is like `strlen' but searches only a given maximum
1424 number of characters for the null terminator. `stpncpy', `strndup' and
1425 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1426 function.
1428 * New function `statfs' in header <sys/statfs.h>.
1430 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1431 provide convenient functions for operating on blocks of null-terminated
1432 strings.
1434 * A new suite of functions in <utmp.h> handle all the details of reading
1435 and writing the utmp file.
1437 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1438 Thorsten Kukuk.
1440 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1441 completely POSIX compliant and also implemented the extended functionality
1442 to handle alternate digit representation and alternate era date formats.
1444 * Ulrich Drepper provided an implementation of the `strptime' function
1445 defined in XPG4.2 which transforms a string into a `struct tm' value.
1447 * Paul Eggert provided the tzselect shell script as part of the timezone
1448 code. The shell script makes it easy to select the correct timezone
1449 specification.
1451 * The implementation of the malloc family of functions is completely replaced
1452 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1453 The implementation uses the mmap function (if available) and it is
1454 optimized for the use in multi threaded programs.
1456 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1457 functions. This new functionality is usable by specifying a special
1458 salt string and it is compatible with implementation on *BSD systems.
1460 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1461 `getsubopt' to handle second level command line options, `bsd_signal'
1462 to access BSD style `signal' functionality, the obsolete `regexp' style
1463 expression matcher.
1465 * the `lchown' function is available on system which support this
1466 functionality.
1468 * The implementation of the shadow password handling function was contributed
1469 by Ulrich Drepper.
1471 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1473 * POSIX.1g support was added. The <sys/select.h> header is available,
1474 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1475 implementation of `getaddrinfo'.
1476 \f
1477 Version 1.09
1479 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1481 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1482 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1484 * The new function `daemon' from 4.4 BSD is useful for server programs that
1485 want to put themselves in the background.
1487 * Joel Sherrill has contributed support for several standalone boards that
1488 run without an operating system.
1490 * `printf', `scanf' and friends now accept a `q' type modifier for long
1491 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1493 * All of the code taken from BSD (notably most of the math and networking
1494 routines) has been updated from the BSD 4.4-Lite release.
1496 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1498 * The new functions `getdomainname' and `setdomainname' fetch or change the
1499 YP/NIS domain name. These are system calls which exist on systems which
1500 have YP (aka NIS).
1502 * The time zone data files have been updated for the latest international
1503 conventions.
1505 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1506 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1507 \f
1508 Version 1.08
1510 * The C library now includes support for Sun RPC, from Sun's free
1511 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1512 are included. (There is still no support for YP.)
1514 * Tom Quinn has contributed a port of the C library to SGI machines running
1515 Irix 4 (mips-sgi-irix4).
1517 * The new `lockf' function is a simplified interface to the locking
1518 facilities of `fcntl', included for compatibility.
1520 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1522 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1524 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1525 compatibility.
1527 * The error message printed by `assert' for a failed assertion now includes
1528 the name of the program (if using GNU ld) and the name of the calling
1529 function (with versions of GCC that support this).
1531 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1533 * The library now includes the <sys/mman.h> header file and memory
1534 management functions `mmap', `munmap', `mprotect', `msync', and
1535 `madvise', on systems that support those facilities.
1537 * The interface for `mcheck' has changed slightly: the function called to
1538 abort the program when an allocation inconsistency is detected now takes
1539 an argument that indicates the type of failure. The new function
1540 `mprobe' lets you request a consistency check for a particular block at
1541 any time (checks are normally done only when you call `free' or `realloc'
1542 on a block).
1544 * It is now possible to easily cross-compile the C library, building on one
1545 system a library to run on another machine and/or operating system. All
1546 you need to do is set the variable `HOST_CC' in `configparms' to the
1547 native compiler for programs to run on the machine you are building on (a
1548 few generator programs are used on Unix systems); set `CC' to the
1549 cross-compiler.
1551 * The new function `fexecve' (only implemented on the GNU system) executes
1552 a program file given a file descriptor already open on the file.
1553 \f
1554 Version 1.07
1556 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1557 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1559 * You can set the variable `libprefix' in `configparms' to specify a prefix
1560 to be prepended to installed library files; this makes it easy to install
1561 the GNU C library to be linked as `-lgnuc' or whatever.
1563 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1564 copies a limited number of characters from a string, and returns the
1565 address of the last character written.
1567 * You no longer need to check for whether the installed `stddef.h' is
1568 compatible with the GNU C library. configure now checks for you.
1570 * You can now define a per-stream `fileno' function to convert the
1571 stream's cookie into an integral file descriptor.
1573 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1574 allocates zero bytes of storage, and returns a unique pointer which
1575 you can pass to `realloc' or `free'. The behavior is undefined if
1576 you dereference this pointer.
1578 * The C library now runs on Sony NEWS m68k machines running either
1579 NewsOS 3 or NewsOS 4.
1581 * The new `syscall' function is a system-dependent primitive function
1582 for invoking system calls. It has the canonical behavior on Unix
1583 systems, including unreliable return values for some calls (such as
1584 `pipe', `fork' and `getppid').
1586 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1587 to `EAGAIN', which is the preferred name. On systems whose kernels
1588 use two distinct codes, the C library now translates EWOULDBLOCK to
1589 EAGAIN in every system call function.
1590 \f
1591 Version 1.06
1593 * The GNU C Library Reference Manual is now distributed with the library.
1594 `make dvi' will produce a DVI file of the printed manual.
1595 `make info' will produce Info files that you can read on line using C-h i
1596 in Emacs or the `info' program.
1597 Please send comments on the manual to bug-glibc-manual@gnu.org.
1599 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1601 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1603 * Jason Merrill has contributed a port to the Sequent Symmetry running
1604 Dynix version 3 (i386-sequent-dynix).
1606 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1607 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1609 * New function `memory_warnings' lets you arrange to get warnings when
1610 malloc is running out of memory to allocate, like Emacs gives you.
1612 * The C library now contains the relocating allocator used in Emacs 19 for
1613 its editing buffers. This allocator (ralloc) minimizes allocation
1614 overhead and fragmentation by moving allocated regions around whenever it
1615 needs to. You always refer to a ralloc'd region with a "handle" (a
1616 pointer to a pointer--an object of type `void **').
1618 * There is a new `printf' format: `%m' gives you the string corresponding
1619 to the error code in `errno'.
1621 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1622 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1623 pass, the `a' modifier says to fill in a `char **' you pass with a
1624 malloc'd string.
1626 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1627 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1628 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1630 * `mkstemp' is a traditional Unix function to atomically create and open a
1631 uniquely-named temporary file.
1632 \f
1633 Version 1.05
1635 * The standard location for the file that says what the local timezone is
1636 has changed again. It is now `/usr/local/etc/localtime' (or more
1637 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1639 * The distribution no longer contains any files with names longer than 14
1640 characters.
1642 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1643 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1645 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1646 \f
1647 Version 1.04
1649 * The configuration process has changed quite a bit. The `configure'
1650 script is now used just like the configuration scripts for other GNU
1651 packages. The `sysdeps' directory hierarchy is much rearranged.
1652 The file `INSTALL' explains the new scheme in detail.
1654 * The header files no longer need to be processed into ANSI C and
1655 traditional C versions. There is just one set of files to install, and
1656 it will work with ANSI or old C compilers (including `gcc -traditional').
1658 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1659 MIPS DECStation running Ultrix 4.
1661 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1662 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1663 made itself into a shared library.
1665 * Yet further improved support for the i386, running 4.3 BSD-like systems
1666 (such as Mach 3 with the Unix single-server), or System V.
1668 * New function `strncasecmp' to do case-insensitive string comparison
1669 with limited length.
1671 * New function `strsep' is a reentrant alternative to `strtok'.
1673 * New functions `scandir' and `alphasort' for searching directories.
1675 * New function `setenv' is a better interface to `putenv'.
1677 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1678 function for traversing a directory tree.
1680 * The GNU obstack package is now also part of the C library.
1681 The new function `open_obstack_stream' creates a stdio stream that
1682 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1683 formatted output directly to an obstack.
1685 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1686 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1688 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1690 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1691 things to your strings.
1693 * There are some new test programs: test-fseek, testmb, and testrand.
1695 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1696 These ports are not finished, but are a good starting place for really
1697 supporting those systems.
1699 * `/etc/localtime' is now the standard location for the file that says what
1700 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1701 This follows the general principle that `/etc' is the place for all local
1702 configuration files.
1704 * The C library header files now use `extern "C"' when used by the C++
1705 compiler, so the C library should now work with C++ code.
1707 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1708 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
1709 in <strings.h>.)
1711 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1712 function which uses the `merge sort' algorithm, and is said to be
1713 significantly faster than the old GNU `qsort' function. Merge sort is
1714 now the standard `qsort' function. The new algorithm can require a lot
1715 of temporary storage; so, the old sorting function is called when the
1716 required storage is not available.
1718 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1719 provides the Unix `crypt' function, plus some other entry points.
1721 * The code and header files taken from 4.4 BSD have been updated with the
1722 latest files released from Berkeley.
1723 \f
1724 ----------------------------------------------------------------------
1725 Copyright information:
1727 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1728 Free Software Foundation, Inc.
1730 Permission is granted to anyone to make or distribute verbatim copies
1731 of this document as received, in any medium, provided that the
1732 copyright notice and this permission notice are preserved,
1733 thus giving the recipient permission to redistribute in turn.
1735 Permission is granted to distribute modified versions
1736 of this document, or of portions of it,
1737 under the above conditions, provided also that they
1738 carry prominent notices stating who last changed them.
1739 \f
1740 Local variables:
1741 version-control: never
1742 End: