1 GNU C Library NEWS -- history of user-visible changes. 2009-8-8
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.
10 * New interfaces: execvpe
11 Implemented by Ulrich Drepper.
13 * checking version of longjmp added that fails if an uninitialized stack
14 frame would be created. Implemented by Ulrich Drepper.
16 * STT_GNU_IFUNC is now supported in static executables.
17 Implemented by H.J. Lu.
19 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
20 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
21 strncmp (SSE2, SSE4.2).
22 Contributed by H.J. Lu.
24 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
25 Implemented by Ulrich Drepper.
27 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
29 Contributed by H.J. Lu.
31 * Support for fma instruction in AVX on x86-64.
32 Implemented by H.J. Lu and Ulrich Drepper.
34 * AVX support in x86-64 auditing support in ld.so.
35 Implemented by H.J. Lu.
37 * STB_GNU_UNIQUE support added.
38 Implemented by Ulrich Drepper.
40 * Implement second fallback mode for optimized DNS lookup for even more
41 broken environments. If two requests from the same port are not
42 handled correctly close the socket and open a new one before sending
43 the second request. The 'single-request-reopen' option in /etc/resolv.conf
44 can be used to select this mode right away, instead of rediscovering the
45 necessity is every process again.
46 Implemented by Ulrich Drepper.
48 * More checking functions: longjmp checks for use of uninitialized stack
49 frames. Implemented by Ulrich Drepper.
51 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
52 Implemented by Adam Tkac.
54 * Optimized iconv conversions for S390x.
55 Implemented by Andreas Krebbel.
57 * Using condvars with PI mutexes is now more efficient due to kernel
58 support for requeueing to PI futexes. NPTL support added for x86-64.
59 Implemented by Ulrich Drepper.
64 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
65 Implemented by Ulrich Drepper.
67 * New Linux interfaces: accept4, fallocate, fallocate64.
68 Implemented by Ulrich Drepper.
70 * Correct declarations of string function when used in C++ code. This
71 could lead to compile errors for invalid C++ code.
73 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
76 * New POSIX 2008 interface: psiginfo
77 Implemented by Ulrich Drepper.
79 * New ISO C++1x interfaces: quick_exit, at_quick_exit
80 Implemented by Ulrich Drepper.
82 * Support for selecting between multiple function definitions at runtime
83 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
85 * The libcrypt library can now use the hash function implementations in
86 NSS. Implemented by Ulrich Drepper.
88 * The malloc implementation can be compiled to be less memory efficient
89 but higher performing in multi-threaded programs.
90 Implemented by Ulrich Drepper.
92 * New locales: nan_TW@latin, ks_IN
94 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
95 Implemented by Ulrich Drepper.
97 * Extended printf hook support. It is possible to use user-defined types
98 and extend existing format specifiers.
99 Implemented by Ulrich Drepper.
101 * Handling for group shadow files has been added.
102 Implemented by Ulrich Drepper.
104 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
105 servers (the case, e.g., for some people using the built-in DNS
106 server in ADSL modems/routers). There is a once-per-process timeout
107 in case of a broken server. To avoid it, users can run nscd or put
108 'options single-request' in /etc/resolv.conf.
109 Implemented by Ulrich Drepper.
114 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
115 up at the same time. Implemented by Ulrich Drepper.
117 * TLS descriptors for LD and GD on x86 and x86-64.
118 Implemented by Alexandre Oliva.
120 * getaddrinfo now handles DCCP and UDPlite.
121 Implemented by Ulrich Drepper.
123 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
124 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
125 Implemented by Ulrich Drepper.
127 * New implementation of memmem, strstr, and strcasestr which is O(n).
128 Implemented by Eric Blake.
130 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
132 * Implement "e" option for popen to open file descriptor with the
133 close-on-exec flag set. Implemented by Ulrich Drepper.
135 * Implement "b" mode for fmemopen. In this mode writes writes don't
136 implicitly add a NUL byte and seeks from the end of the buffer really
137 use the buffer end, not the string length as the basis.
138 Implemented by Ulrich Drepper.
140 * Many functions, exported and internal, now atomically set the close-on-exec
141 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
143 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
145 Implemented by Pravin Satpute.
147 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
151 * New locales: bo_CN, bo_IN, shs_CA.
153 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
155 * Sorting rules for some Indian languages (Devanagari and Gujarati).
156 Implemented by Pravin Satpute.
158 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
160 * nscd caches now all timeouts for DNS entries
161 Implemented by Ulrich Drepper.
163 * nscd is more efficient and wakes up less often.
164 Implemented by Ulrich Drepper.
166 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
167 vdprintf, and obstack_vprintf.
168 Implemented by Jakub Jelinek.
170 * Faster memset for x86-64.
171 Implemented by Harsha Jagasia and H.J. Lu.
173 * Faster memcpy on x86.
174 Implemented by Ulrich Drepper.
176 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
177 Implemented by Ulrich Drepper.
179 * Faster sqrt and sqrtf implemention for some PPC variants.
180 Implemented by Stephen Munroe.
184 * More checking functions: fread, fread_unlocked, open*, mq_open.
185 Implemented by Jakub Jelinek and Ulrich Drepper.
187 * Extend fortification to C++. Implemented by Jakub Jelinek.
189 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
190 by not recognizing 'a' as a modifier when those specs are requested.
191 Implemented by Jakub Jelinek.
193 * PPC optimizations to math and string functions.
194 Implemented by Steven Munroe.
196 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
197 options to be passed. Implemented by Ulrich Drepper.
199 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
201 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
202 Implemented by Ulrich Drepper.
204 * Handle private futexes in the NPTL implementation.
205 Implemented by Jakub Jelinek and Ulrich Drepper.
207 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
208 Implemented by Roland McGrath and Ulrich Drepper.
210 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
212 * SHA-256 and SHA-512 based password encryption.
213 Implemented by Ulrich Drepper.
215 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
216 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
219 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
220 Implemented by Ulrich Drepper.
224 * New Linux interfaces: epoll_pwait, sched_getcpu.
226 * New generic interfaces: strerror_l.
228 * nscd can now cache the services database. Implemented by Ulrich Drepper.
233 * For Linux, the sorting of addresses returned by getaddrinfo now also
234 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
235 Implemented by Ulrich Drepper.
237 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
238 Implemented by Ulrich Drepper.
240 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
242 * New iconv module for MIK. Contributed by Alexander Shopov.
244 * For sites with broken group and/or passwd database, the auto-propagate
245 option of nscd can prevent creating ID lookup entries from the results
246 of a name lookup and vice versa. This usually is no problem but some
247 site might have problems with the default behavior.
248 Implemented by Ulrich Drepper.
250 * Iterating over entire database in NIS can be slow. With the
251 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
252 to trade time for memory. The entire database will be read at once.
253 Implemented by Ulrich Drepper.
255 * The interfaces introduced in RFC 3542 have been implemented by
258 * Support for the new ELF hash table format was added by Ulrich Drepper.
260 * Support for priority inheritance mutexes added by Jakub Jelinek and
263 * Support for priority protected mutexes added by Jakub Jelinek.
265 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
266 or_IN, csb_PL, fy_NL, sr_ME.
270 * More overflow detection functions.
272 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
273 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
275 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
276 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
277 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
278 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
279 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
280 by Masahide Washizawa.
282 * It is now possible to install audit libraries for the dynamic linker using
283 LD_AUDIT. Implemented by Ulrich Drepper.
285 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
286 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
287 For a libc and libpthread that works well on Linux 2.4 kernels, we
288 recommend using the stable 2.3 branch.
290 * The new function open_wmemstream acts like open_memstream,
291 but uses a wchar_t wide character buffer.
293 * The new function ppoll is an improved version of poll, similar to pselect.
295 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
296 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
297 renameat, unlinkat, linkat, symlinkat, readlinkat.
299 * New Linux kernel system calls: unshare,
300 inotify_init, inotify_add_watch, inotify_rm_watch.
302 * The euidaccess function is now also known by the alias eaccess,
303 for compatibility with some other systems.
305 * Timezone data updated to 2006b version.
309 * The following bugs are resolved with this release:
311 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
312 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
313 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
314 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
315 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
316 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
318 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
320 * As of this release, GCC 4 can be used to compile the C Library.
322 * Timezone data updated to 2005m version.
326 * The following bugs are resolved with this release:
328 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
329 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
330 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
331 777, 787, 821, 822, 823, 825
333 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
337 * Support for RFC 3678. Real implementations exist only for Linux so far.
338 Implemented by Ulrich Drepper.
340 * nscd can now cache entries persistently. Expiring entries are reloaded.
341 For speedups the cache can be shared in memory with client processes.
342 Implemented by Ulrich Drepper.
344 * nscd can now perform SELinux checks.
345 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
347 * getaddrinfo queries are now cached. Canonical name lookup is performed
349 Implemented by Ulrich Drepper.
351 * The nothrow function attribute is used when headers are used by gcc when
352 compiling C code. This can avoid significant amounts of exception
355 * The malloc functions perform more error checking and are stricter when
356 it comes to reacting on errors. The default action is to terminate
357 the process after showing an error message. Implemented by Ulrich Drepper.
359 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
360 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
362 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
363 namespaces using the new function dlmopen(). This feature is of course,
364 like most other dynamic loading functionality, not available in statically
365 linked applications. Implemented by Ulrich Drepper.
367 * Low-overhead boundary checking variants of string and some stdio functions
368 were added. These are to be used in conjunction with a gcc patch by
369 Jakub Jelinek which adds calls to these functions if possible.
370 Implemented by Jakub Jelinek and Ulrich Drepper.
372 * Old code for several operating systems and machine architectures that
373 have not been in working condition in a long time have been removed from
374 the main source tree maintained by the GNU C Library's maintainers.
375 These files are now reside in the separate `ports' source module
376 that is usable as an add-on when building the library.
380 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
381 interrogate the dynamic linker, compatible with the Solaris interface.
383 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
384 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
386 * getifaddrs now uses the netlink interface on Linux to get its information.
387 Implemented by Thorsten Kukuk.
389 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
390 Implemented by Ulrich Drepper.
392 * support for non-executable stacks on x86 has been added. Changes mostly
395 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
398 * getaddrinfo now performs destination address selection according to
403 * Thread-safe interfaces for many functions that access locale data
404 were added in version 2.3, but these features were omitted from NEWS.
405 Many functions have variants with an `_l' suffix that take a `locale_t'
406 object as a parameter rather than consulting the current locale.
407 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
408 create and maintain `locale_t' objects. Additionally, the new function
409 `uselocale' sets "the current locale" (as used by functions not so
410 parameterized) set for an individual thread. These features were added
411 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
413 * The functions getresuid, getresgid, setresuid, and setresgid, which
414 have long been available on Linux, are now declared in <unistd.h>
415 and are now also available on the Hurd.
417 * ELF thread-local storage support (TLS) now works on x86-64.
419 * The new dynamic string token $LIB is expanded in shared library names.
420 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
422 * Aldy Hernandez contributed complete software floating point support for
423 PowerPC machines with no FPU.
425 * fexecve is implemented on Linux.
427 * The `btowc' function should work at least twice as fast due to
428 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
430 * With approriate thread add-ons cancelable functions are now implemented
431 in libc.so as well. No need to call the function in libpthread. This
432 change allowed to finally disable the incorrect and expensive handling
433 of weak definition in ld.so.
435 * Yet more PLT entries in libc.so have been removed. We finally arrived
436 at the bare minimum. Startup times improved appropriately.
438 * Support for the new Linux/x86 system call interface was added. The
439 AT_SYSINFO auxiliary vector entry is recognized and handled.
443 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
446 * iconv (the program and the interface) now accepts empty names (excluding
447 options like //TRANSLIT) to mean "use charset of current locale".
449 * localedef can now transliterate characters in strings which are not in
450 the provided charmap. The information from the input locale is used.
452 * Prelinking support was added for ELF targets. This requires additional
453 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
455 * Read-only stdio streams now use mmap to speed up operation by eliminating
456 copying and buffer underflows. To use add 'm' to the mode string of
457 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
459 * The malloc functions were completely rewritten by Wolfram Gloger based
460 on Doug Lea's malloc-2.7.0.c.
462 * Isamu Hasegawa contributed a completely new and POSIX-conformant
463 implementation of regex.
465 * Bruno Haible upgraded the iconv and locale implementation to support
468 * Contents of the LC_* and LANG environment variables in the CEN style are
469 not recognized anymore. It never was used. Change by Ulrich Drepper.
471 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
472 thread-local storage (TLS) ABI on some platforms.
473 Changes by Ulrich Drepper. SH support by Kaz Kojima.
475 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
476 EUC-JISX0213, and TSCII.
478 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
479 BSD-compatible interface for getting all network interface addresses.
480 Implementation for IPv4 by Roland McGrath.
482 * Loading of locale data is faster due to the introduction of a locale
483 archive. Implemented by Roland McGrath and Ulrich Drepper.
485 * Startup times are significantly reduced by not using exported functions
486 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
489 * Steven Munroe contributed a port to PowerPC64/Linux.
493 * The Hurd now uses the GNU libio implementation of stdio rather than the
494 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
496 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
497 with the same behavior as the Linux system call of the same name.
501 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
502 128-bit long double format.
504 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
505 IBM1161, and IBM1162 charsets.
507 * Andreas Jaeger contributed a port to x86-64/Linux.
509 * Peter Bruin contributed a port to PowerPC/Hurd.
511 * libc functions using I/O streams now can handle wide-oriented streams
514 * optimizations in the dynamic linker. Binaries created by recent binutils
515 versions start up quicker due to reduced time spent on relocations.
517 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
521 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
522 asinh, atanh, j0 for the 128-bit long double format.
524 * Bruno Haible updated all the code handling Unicode in some form to
527 * Speed of regex for single-byte locales is back to previous levels.
528 Patch by Isamu Hasegawa.
530 * Alpha, SPARC, and IA-64 now also using floating stacks.
532 * Startup time of internationalized applications greatly improved through
533 iconv cache. Use iconvconfig to generate the cache file.
534 Contributed by Ulrich Drepper.
536 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
537 severe performance problems. Patch by David Mosberger.
539 * The Hurd port got a lot more functionality like AIO, various stdio
540 extensions, etc. Mainly done by Roland McGrath.
542 * mtrace can now lookup symbols in shared libraries.
546 * Intel's IA-64 math library is largely integrated. It provides fast and
547 accurate implementatations for most basic and standard math functions
548 in float, double, and long double format.
550 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
551 and asin for the 96-bit long double format and asin, log, tan for the
552 128-bit long double format.
554 * The beginning of a last-bit accurate math library by IBM Haifa were added.
555 The basic double functions exist today. Contributed by Abraham Ziv
556 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
557 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
559 * An asynchronous name lookup library was added. The interface is designed
560 after POSIX AIO. The proposal was circulated beforehand to get comments.
561 No negative ones came in. Implemented by Ulrich Drepper.
563 * Port to S390/64bit contributed by Martin Schwidefsky
564 <schwidefsky@de.ibm.com>.
566 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
567 of functions for Linux/IA-64.
569 * The RPC code is now thread safe. Threads can now use the same service
570 of different services at the same time. Patch by Eric Norum
571 <eric.norum@usask.ca> with some help by Ulrich Drepper.
573 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
574 family of functions for Linux/S390.
576 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
577 of functions for Linux/x86.
579 * Port to Linux/CRIS contributed by Axis Communications.
583 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
584 we can now check for namespace violations and missing declarations. The
585 result is that almost all headers are now Unix-compliant (as defined in
586 the upcoming XPG6). The negative side is that some programs might need
587 corrections, too, if they depend on the incorrect form of the headers in
588 previous versions which defined too many symbols and included too many
591 * regex now handles multibyte character sets correctly.
592 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
594 * iconv (the program) does now conform to the upcoming XPG6 and handles
595 charmaps. Instead of the charset names the path of charmaps can be
596 provided and the conversion happens based on this data.
597 Contributed by Ulrich Drepper.
599 * The locale program now provides detailed information about the installed
604 only lists the names of the supported locales
608 provides details such as country, language, and codeset name.
609 Contributed by Ulrich Drepper.
613 * The gencat program now parses the input file according to the charset
614 selected by the LC_CTYPE category. This is important for stateful
615 character sets. To make generating catalogs easier there is a way
616 to overwrite the charset selected by the locale: before the first
617 message or $ quote line the catalog can contain a line like
621 to select the charset (ISO-8859-2 in this case).
623 Implemented by Shinya Hanataka and Ulrich Drepper.
625 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
626 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
627 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
629 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
630 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
632 * The LANGUAGE environment variable is now ignored unless the locale is
633 changed from the default "C" locale.
635 * The usual bug fixes.
639 * Greg McGary added runtime support for bounds checking using gcc's
640 new -fbounded-pointers option. ix86 target is complete. PowerPC
643 * Thorsten Kukuk added secure mode support to nscd.
645 * The Berkeley db libraries have been removed.
647 Related, the nss_db module is now in a separate package since it
648 obviously requires a database library being available.
650 * Wide character I/O streams implemented by Ulrich Drepper.
652 * Functions from the extended socket API added by Ulrich Drepper.
654 * Functions feenableexcept and fedisableexcept to control the
655 behaviour of individual exceptions have been added by Andreas Jaeger.
657 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
659 * The resolver code has been updated from bind 8.2.3-T5B which supports
660 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
663 This change could in some situations effect backward compatibility. Since
664 now `_res' is a thread-local instead of a global variable, modifying it
665 in one thread does not have any effect in other threads.
667 The resolver library was also extended to allow IPv6 as the transport
668 protocol for the requests. This work was done by Stig Venaas.
670 * Compatibility code for K&R C compilers has been removed from the
671 header files. A ISO C compiler is needed to use the library
672 (conforming to either C89 or C99 standard).
674 * Complete rewrite of the localedef program to support multibyte character
675 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
676 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
677 Implemented by Ulrich Drepper.
679 Bruno Haible significantly improved the generation and use of the data
680 structures for the wide character tables.
682 * Plural handling in gettext implemented by Ulrich Drepper.
684 * The utmp daemon has been removed.
686 * The port to MIPS-Linux has been finished by Andreas Jaeger.
688 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
691 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
693 * POSIX barriers implemented by Kaz Kylheku.
695 * POSIX spawn function family implemented by Ulrich Drepper.
697 * POSIX spinlocks are now available.
699 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
701 * the configure option --enable-kernel=X.Y.Z allows to strip out
702 compatibility for kernel versions before X.Y.Z. This is currently only
703 implemented for Linux.
705 * the sockaddr_in6 structure changed. The IPv6 working group added a new
706 field sin6_scope_id. This means that all programs using IPv6 should be
707 recompiled. Don't expect binary compatibility with previous glibc
710 * various conversion modules for IBM character sets contributed by
713 * IA-64 port by Jes Sorensen and HJ Lu.
715 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
716 Compiling the GNU C Library for Linux/ia64
717 ******************************************
719 Please refer to the file INSTALL in the same directory as you found
720 this file for general information about configuring and compiling
723 For general inquiries about glibc under Linux/ia64 please use the
724 following mailing list linux-ia64@linuxia64.org or one of the relevant
727 Recommended Tools for Compilation
728 =================================
730 In order for glibc-2.2 to build correctly on the ia64 you need at
731 least the following versions of the GNU tools (the :
733 * The Cygnus toolchain snapshot for the ia64 as of August 4
734 including the provided set of patches. It is however recommend
735 you use the October 24 toolchain snapshot or a more recent version.
737 OR alternatively you can try the following (the Cygnus toolchain is
738 the recommended solution):
740 * GCC and binutils, GAS and GNU LD out of CVS from
741 sources.redhat.com as of August 28, 2000 or later. The CVS tree
742 may require special patches to work properly on the ia64.
744 Configuring and compiling GNU Libc for Linux/ia64
745 =================================================
747 The library requires Linux kernel version 2.4.0-test4-000728 or
748 later to funtion properly. Besides that it support for debug libraries
749 is currently untested. Hence the following options
750 are required for configuring the library:
752 --disable-debug --enable-kernel=2.4.0
754 It is also important that you make sure the library picks up the
755 appropriate kernel header files, if you do not have recent enough
756 kernel headers in /usr/src/linux/include, you should use the
757 --with-headers=<path> option to specify the location.
759 As an example I personally use the following options to configure
764 --enable-kernel=2.4.0
768 --with-headers=/home/jes/linux/include
773 Jes Sorensen <jes@linuxcare.com>,
775 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
789 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
791 * New xdr functions are added; some rpc functions are now 64bit clean.
793 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
795 * Fixed known incompatibilities with glibc 2.0.
797 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
799 * Optimized a number of functions (especially the ELF dynamic loader).
801 * Update timezone data files.
803 * lots of charmaps corrections
805 * some new locale definitions and charmaps
810 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
811 conform to POSIX member type requirements. Symbol versions have been
812 adjusted as needed within the library, and for direct use by applications,
813 but there is potential for problems if third-party libraries use
814 struct timeval as part of their interface. This does not present
815 a problem for X and other "essential" system libraries.
817 * An additional locale model to support C++ Standard Library locale
818 model and probably more was implemented by Ulrich Drepper.
820 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
823 * Miles Bader provided the `argp' function family to support hierachical
824 command line argument parsing, layered on top of getopt.
826 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
828 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
831 * scanf recognizes the %a and %A format for scanning floating point numbers.
833 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
834 information and interfaces for the available integer types.
836 * about 130 new math functions were added to implement the ISO C9x math
839 * the new header <complex.h> contains definitions of the complex math
840 functions from ISO C 9X.
842 * the new header <tgmath.h> defines generic macros to use complex or
843 real valued functions.
845 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
847 * Andreas Jaeger provided a test suite for the math library.
849 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
851 * Ulrich Drepper added character set conversion functions (iconv).
853 * Optimized string functions have been added.
855 * The localedata addon is now part of glibc.
857 * An implementation of profiling shared libraries was added by Ulrich Drepper.
859 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
860 daemon for NSS (nscd).
862 Missing a better place here are some numbers on improvements. Under
863 Linux 2.1.125 un-tar-ing the kernel sources takes
867 using local files 12.19s 6.88s 22.91s
869 using NIS 13.92s 8.91s 26.34s
871 using NIS & nscd 10.37s 7.34s 25.30s
873 using NIS+ 27.57s 30.37s 640.46s
875 using NIS+ & nscd 10.25s 7.83s 26.51s
877 using NIS & old nscd [1] 13.83s 8.32s 29.60s
879 Keep in mind that non-namelookup related operations dominate above times.
880 It was just a common complain that using NIS+ unpacking the kernel is
883 [1] The old nscd implementation is not available anymore since it was
884 distributed with glibc up to version 2.0.98 and thus is now replaced.
886 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
888 * Mark Kettenis provided a Hesiod NSS module.
890 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
891 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
893 * rcmd can now handle netgroups (Dick Streefland).
895 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
898 * Support for the IPv6 protocol has been added to the socket API, as per the
899 latest draft standards.
901 * Support for Linux 2.2 has been added.
903 * Interface changes relative to the latest 2.0.x release:
904 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
905 addseverity NEW: Unix98
907 argp_err_exit_status NEW: argp, GNU ext
908 argp_error NEW: argp, GNU ext
909 argp_failure NEW: argp, GNU ext
910 argp_help NEW: argp, GNU ext
911 argp_parse NEW: argp, GNU ext
912 argp_program_bug_address NEW: argp, GNU ext
913 argp_program_version NEW: argp, GNU ext
914 argp_program_version_hook NEW: argp, GNU ext
915 argp_state_help NEW: argp, GNU ext
916 argp_usage NEW: argp, GNU ext
917 authdes_create NEW: Secure RPC
918 authdes_getucred NEW: Secure RPC
919 authdes_pk_create NEW: Secure RPC
920 backtrace NEW: GNU ext.
921 backtrace_symbols NEW: GNU ext.
922 backtrace_symbols_fd NEW: GNU ext.
926 cacoshf NEW: ISO C 9x
927 cacoshl NEW: ISO C 9x
937 casinhf NEW: ISO C 9x
938 casinhl NEW: ISO C 9x
943 catanhf NEW: ISO C 9x
944 catanhl NEW: ISO C 9x
946 cbc_crypt NEW: Secure RPC
959 clearerr_locked REMOVED
960 clntunix_create NEW: sunrpc ext
963 clog10f NEW: ISO C 9x
964 clog10l NEW: ISO C 9x
995 des_setparity NEW: Secure RPC
996 ecb_crypt NEW: Secure RPC
997 endutxent NEW: Unix98
1000 exp10l NEW: ISO C 9x
1004 fattach NEW: STREAMS
1005 fdetach NEW: STREAMS
1009 feclearexcept NEW: ISO C 9x
1010 fegetenv NEW: ISO C 9x
1011 fegetexceptflag NEW: ISO C 9x
1012 fegetround NEW: ISO C 9x
1013 feholdexcept NEW: ISO C 9x
1015 feraiseexcept NEW: ISO C 9x
1016 ferror_locked REMOVED
1017 fesetenv NEW: ISO C 9x
1018 fesetexceptflag NEW: ISO C 9x
1019 fesetround NEW: ISO C 9x
1020 fetestexcept NEW: ISO C 9x
1021 feupdateenv NEW: ISO C 9x
1022 fflush_locked REMOVED
1026 fgets_unlocked NEW: GNU ext.
1027 fileno_locked REMOVED
1039 fputc_locked REMOVED
1040 fputs_unlocked NEW: GNU ext.
1041 fread_unlocked NEW: GNU ext.
1046 fstatvfs NEW: Unix98
1050 ftruncate64 NEW: LFS
1052 fwrite_unlocked NEW: GNU ext.
1053 gai_strerror NEW: IPv6
1057 getchar_locked REMOVED
1059 getdate_err NEW: Unix98
1060 getdate_r NEW: GNU ext.
1062 getnameinfo NEW: IPv6
1063 getnetname NEW: Secure RPC
1064 getpmsg NEW: STREAMS
1065 getpt NEW: Unix98 PTY
1066 getrlimit64 NEW: LFS
1067 getutxent NEW: Unix98
1068 getutxid NEW: Unix98
1069 getutxline NEW: Unix98
1070 glob64 NEW: GNU ext.
1071 globfree64 NEW: GNU ext.
1072 gnu_get_libc_release NEW: GNU ext.
1073 gnu_get_libc_version NEW: GNU ext.
1074 grantpt NEW: Unix98 PTY
1075 host2netname NEW: Secure RPC
1077 iconv_close NEW: iconv
1078 iconv_open NEW: iconv
1079 if_freenameindex NEW: IPv6
1080 if_indextoname NEW: IPv6
1081 if_nameindex NEW: IPv6
1082 if_nametoindex NEW: IPv6
1083 in6addr_any NEW: IPv6
1084 in6addr_loopback NEW: IPv6
1085 inet6_isipv4mapped NEW: IPv6
1086 isastream NEW: STREAMS
1087 iswblank NEW: GNU ext.
1088 key_decryptsession NEW: Secure RPC
1089 key_decryptsession_pk NEW: Secure RPC
1090 key_encryptsession NEW: Secure RPC
1091 key_encryptsession_pk NEW: Secure RPC
1092 key_gendes NEW: Secure RPC
1093 key_get_conv NEW: Secure RPC
1094 key_secretkey_is_set NEW: Secure RPC
1095 key_setnet NEW: Secure RPC
1096 key_setsecret NEW: Secure RPC
1097 llrint NEW: ISO C 9x
1098 llrintf NEW: ISO C 9x
1099 llrintl NEW: ISO C 9x
1100 llround NEW: ISO C 9x
1101 llroundf NEW: ISO C 9x
1102 llroundl NEW: ISO C 9x
1107 lrintf NEW: ISO C 9x
1108 lrintl NEW: ISO C 9x
1109 lround NEW: ISO C 9x
1110 lroundf NEW: ISO C 9x
1111 lroundl NEW: ISO C 9x
1113 makecontext NEW: Unix98
1114 mempcpy NEW: GNU ext.
1117 modify_ldt NEW: kernel
1121 nearbyint NEW: ISO C 9x
1122 nearbyintf NEW: ISO C 9x
1123 nearbyintl NEW: ISO C 9x
1124 netname2host NEW: Secure RPC
1125 netname2user NEW: Secure RPC
1126 nexttoward NEW: ISO C 9x
1127 nexttowardf NEW: ISO C 9x
1128 nexttowardl NEW: ISO C 9x
1132 passwd2des NEW: Secure RPC
1134 pow10f NEW: GNU ext.
1135 pow10l NEW: GNU ext.
1138 printf_size NEW: GNU ext.
1139 printf_size_info NEW: GNU ext.
1140 profil_counter REMOVED
1141 pthread_mutexattr_getkind_np REPLACED
1142 pthread_mutexattr_setkind_np REPLACED
1143 ptsname NEW: Unix98 PTY
1144 ptsname_r NEW: Unix98 PTY
1146 putchar_locked REMOVED
1147 putgrent NEW: GNU ext.
1149 putpmsg NEW: STREAMS
1150 pututxline NEW: Unix98
1154 readdir64_r NEW: LFS
1155 remquo NEW: ISO C 9x
1156 remquof NEW: ISO C 9x
1157 remquol NEW: ISO C 9x
1159 roundf NEW: ISO C 9x
1160 roundl NEW: ISO C 9x
1162 scalbln NEW: ISO C 9x
1163 scalblnf NEW: ISO C 9x
1164 scalblnl NEW: ISO C 9x
1166 sendfile NEW: kernel
1167 setcontext NEW: Unix98
1168 setrlimit64 NEW: LFS
1169 setutxent NEW: Unix98
1171 sigignore NEW: Unix98
1172 sigqueue NEW: POSIX.1b
1173 sigrelse NEW: Unix98
1174 sigset NEW: POSIX.1b
1175 sigtimedwait NEW: POSIX.1b
1176 sigwaitinfo NEW: POSIX.1b
1177 sincos NEW: GNU ext.
1178 sincosf NEW: GNU ext.
1179 sincosl NEW: GNU ext.
1183 strcasestr NEW: GNU ext.
1184 strtoimax NEW: ISO C 9x
1185 strtoumax NEW: ISO C 9x
1186 strverscmp NEW: GNU ext.
1187 svcauthdes_stats NEW: Secure RPC
1188 svcunix_create NEW: sunrpc etx
1189 svcunixfd_create NEW: sunrpc ext
1190 swapcontext NEW: Unix98
1191 tcgetsid NEW: Unix98 PTY
1192 tdestroy NEW: GNU ext.
1193 tgamma NEW: ISO C 9x
1194 tgammaf NEW: ISO C 9x
1195 tgammal NEW: ISO C 9x
1199 truncf NEW: ISO C 9x
1200 truncl NEW: ISO C 9x
1202 unlockpt NEW: Unix98 PTY
1203 updwtmpx NEW: Unix98
1204 user2netname NEW: Secure RPC
1205 utmpxname NEW: Unix98
1206 versionsort NEW: GNU ext.
1207 versionsort64 NEW: GNU ext.
1209 wcscasecmp NEW: GNU ext.
1210 wcsncasecmp NEW: GNU ext.
1211 wcsnlen NEW: GNU ext.
1212 wcstoimax NEW: ISO C 9x
1213 wcstoll NEW: ISO C 9x
1214 wcstoull NEW: ISO C 9x
1215 wcstoumax NEW: ISO C 9x
1217 wordexp NEW: POSIX.2
1218 wordfree NEW: POSIX.2
1219 write_profiling REMOVED
1220 xdecrypt NEW: Secure RPC
1221 xdr_authdes_cred NEW: Secure RPC
1222 xdr_authdes_verf NEW: Secure RPC
1223 xdr_cryptkeyarg NEW: Secure RPC
1224 xdr_cryptkeyarg2 NEW: Secure RPC
1225 xdr_cryptkeyres NEW: Secure RPC
1226 xdr_getcredres NEW: Secure RPC
1227 xdr_key_netstarg NEW: Secure RPC
1228 xdr_key_netstres NEW: Secure RPC
1229 xdr_keybuf NEW: Secure RPC
1230 xdr_keystatus NEW: Secure RPC
1231 xdr_netnamestr NEW: Secure RPC
1232 xdr_sizeof NEW: Secure RPC
1233 xdr_unixcred NEW: sunrpc ext
1234 xencrypt NEW: Secure RPC
1235 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1246 * inet_ntoa is thread-safe
1248 * updwtmp is moved from libutil to libc
1250 * rewrite of cbrt function
1252 * update of timezone data
1266 * add atoll function
1268 * fix complex problems in Berkeley DB code
1270 * fix math functions
1274 * fixed lots of header problems (especially Linux/GNU specific)
1276 * dynamic loader preserves all registers
1278 * Roland McGrath provided support for handling of auxiliary objects in
1279 the ELF dynamic loader.
1281 * support for parallel builds is improved
1285 * GNU extensions are no longer declared by default. To enable them you
1286 must define the macro `_GNU_SOURCE' in your program or compile with
1289 * The library has changed from using GNU ld symbol aliases to using weak
1290 symbols where available. The ELF object file format supports weak
1291 symbols; GNU ld also supports weak symbols in the a.out format. (There
1292 is also now support for other GNU ld extensions in ELF. Use the
1293 `--with-elf' option to configure to indicate you have ELF, and
1294 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1295 of many files which contained only symbol aliases, reducing the size of
1296 the source and the compiled library; many other files were renamed to
1297 less cryptic names previously occupied by the symbol alias files.
1298 There is a new header file <elf.h> for programs which operate on
1299 files in the ELF format.
1301 * Converted to Autoconf version 2, so `configure' has more options.
1302 Run `configure --help' to see the details.
1304 * The library can now be configured to build profiling, highly-optimized
1305 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1306 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1307 `configure' enable building these extra libraries. The shared library is
1308 built by default when using both ELF and GNU ld. When shared libraries
1309 are enabled, the new library `-ldl' is available for arbitrary run-time
1310 loading of shared objects; its interface is defined in <dlfcn.h>. The
1311 new header file <link.h> gives access to the internals of the run-time
1312 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1313 application of same name on other systems and it provides information
1314 about dynamically linked binaries.
1316 * The C library now provides the run-time support code for profiling
1317 executables compiled with `-pg'. Programs can control the profiling code
1318 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1319 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1320 the support for this file format was contributed by David Mosberger-Tang.
1322 * The math code has been replaced with a math library based on fdlibm from
1323 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1324 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1325 functions. The math functions now reside in a separate library, so
1326 programs using them will need to use `-lm' their linking commands.
1328 * John C. Bowman contributed optimized ix87 assembler inline functions.
1330 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1331 mechanism similar to that found in Solaris 2. This is now used for the
1332 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1333 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1334 file controls what services are used for each individual database. This
1335 works by loading shared libraries with names specified in `nsswitch.conf',
1336 so service modules can be changed or added at any time without even
1337 relinking any program. Currently there are the file, db, and NIS based
1338 NSS services available.
1340 * The new functions `strtoq' and `strtouq' parse integer values from
1341 strings, like `strtol' and `strtoul', but they return `long long int' and
1342 `unsigned long long int' values, respectively (64-bit quantities).
1344 * The new functions `strtof' and `strtold' parse floating-point values from
1345 strings, like `strtod', but they return `float' and `long double' values,
1346 respectively (on some machines `double' and `long double' are the same).
1348 * Ulrich Drepper has contributed new implementations of the floating-point
1349 printing and reading code used in the `printf' family of functions and
1350 `strtod', `strtof', and `strtold'. These new functions are perfectly
1351 accurate, and much faster than the old ones.
1353 * The implementation of the POSIX locale model was completely rewritten by
1354 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1355 to compile the POSIX locale definition.
1357 * The former dummy implementations of the strcoll and strxfrm function are
1358 now replaced by fully functional code contributed by Ulrich Drepper. The
1359 collation information comes from the POSIX locale definitions.
1361 * The new header <langinfo.h> defines an interface for accessing
1362 various locale-dependent data (using the locale chosen with `setlocale').
1364 * Ulrich Drepper has contributed a new suite of functions for operation on
1365 wide-character and multibyte-character strings, in <wchar.h>;
1366 and classification and case conversion of wide characters, in <wctype.h>.
1367 These new functions are conforming to the ISO C, Amendement 1 specification.
1369 * There is now a second implementation of the standard I/O library available.
1370 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1371 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1373 * You can now use positional parameter specifications in format strings
1374 for the `printf' and `scanf' families of functions. For example,
1375 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1376 ``Number 6, Mr Jones''. This is mainly useful when providing different
1377 format strings for different languages, whose grammars may dictate
1378 different orderings of the values being printed. To support this
1379 feature, the interface for `register_printf_handler' has changed; see
1380 the header file <printf.h> for details.
1382 * The `printf' and `scanf' families of functions now understand a new
1383 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1384 to group numbers as indicated by the locale; for `scanf' and friends, this
1385 says to accept as valid only a number with all the proper grouping
1386 separators in the right places. In the default "C" locale, numbers are
1387 not grouped; but locales for specific countries will define the usual
1388 conventions (i.e. separate thousands with `,' in the US locale).
1390 * The pgrp functions have been regularized, slightly incompatibly but much
1391 less confusingly. The core functions are now `getpgid' and `setpgid',
1392 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1393 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1394 provided for compatibility. There is no longer an incompatible `getpgrp'
1395 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1397 * The new header file <fts.h> and suite of functions simplify programs that
1398 operate on directory trees. This code comes from 4.4 BSD.
1400 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1401 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1402 NSS scheme used in glibc.
1404 * There is a new malloc debugging hook `__memalign_hook'.
1406 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1407 `unsigned int' in <sys/types.h>. These are for compatibility only and
1408 their use is discouraged.
1410 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1411 done differently, so that it works even without GNU ld.
1413 * New function `euidaccess' checks allowed access to a file like `access',
1414 but using the effective IDs instead of the real IDs.
1416 * The time zone data files have been updated for the latest and greatest
1417 local time conventions of the countries of the world.
1419 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1422 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1423 for formatting floating-point numbers. They are provided only for
1424 compatibility; new programs should use `sprintf' instead. There are
1425 also equivalent function for the `long double' floating-point type and
1426 all functions also exist in a reentrant form.
1428 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1429 functions for maintaining the login-record files (primarily of use to
1430 system programs such as `login'), and convenient functions for
1431 allocating and initializing a pseudo-terminal (pty) device.
1433 * Ulrich Drepper has contributed new support for System V style
1434 shared memory and IPC on systems that support it.
1436 * Ulrich Drepper has contributed several miscellaneous new functions found
1437 in System V: The `hsearch' family of functions provide an effective
1438 implementation of hash tables; `a64l' and `l64a' provide a very simple
1439 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1442 * Ulrich Drepper has contributed new reentrant counterparts for the
1443 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1445 * Ulrich Drepper has contributed new, highly-optimized versions of several
1446 string functions for the i486/Pentium family of processors.
1448 * Ulrich Drepper has updated the Linux-specific code, based largely
1449 on work done in Hongjiu Lu's version of GNU libc for Linux.
1450 The GNU library now supports Linux versions 2.0.10 and later,
1451 using the ELF object file format (i[3456]86-*-linux).
1453 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1455 * David Mosberger-Tang and Richard Henderson have ported the C library
1456 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1457 dynamic linking support for ELF/Alpha.
1459 * Richard Henderson contributed several Alpha optimized assembler function
1460 for arithmetic and string handling.
1462 * Ulrich Drepper has contributed a new set of message catalog functions to
1463 support multiple languages using the <libintl.h> interface, for use with
1464 his new package GNU gettext. Translation volunteers have contributed
1465 catalogs of the library's messages in Spanish, German, and Korean.
1467 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1468 program and the `catgets' function for reading the catalog files it
1469 creates. (The <libintl.h> interface is preferred; we include the
1470 <nl_types.h> interface using `catgets' only for source compatibility with
1471 programs already written to use it.)
1473 * New header file <values.h> gives SVID-compatible names for <limits.h>
1476 * Various new macros, declarations, and small header files for compatibility
1479 * New function `group_member' is a convenient way to check if a process has
1480 a given effective group ID.
1482 * When using GCC 2.7 and later, the socket functions are now declared in a
1483 special way so that passing an argument of type `struct sockaddr_in *',
1484 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1485 `struct sockaddr *' type, does not generate a type-clash warning.
1487 * New function `error' declared in header file <error.h> is a convenient
1488 function for printing error messages and optionally exiting; this is the
1489 canonical function used in GNU programs. The new functions `err', `warn',
1490 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1491 doing the same thing.
1493 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1494 POSIX.2 `glob' function to do ~ and {...} expansion.
1496 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1497 `clearenv' which is used in POSIX.9 is also available.
1499 * New function `getsid' returns session ID number on systems that support it.
1501 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1502 files <db.h> and <mpool.h> provide a rich set of functions for several
1503 types of simple databases stored in memory and in files, and <ndbm.h> is
1504 an old `ndbm'-compatible interface using the `db' functions. Link with
1505 `-ldb' to get these functions.
1507 * New macro `strdupa' copies a string like `strdup', but uses local stack
1508 space from `alloca' instead of dynamic heap space from `malloc'.
1510 * New function `strnlen' is like `strlen' but searches only a given maximum
1511 number of characters for the null terminator. `stpncpy', `strndup' and
1512 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1515 * New function `statfs' in header <sys/statfs.h>.
1517 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1518 provide convenient functions for operating on blocks of null-terminated
1521 * A new suite of functions in <utmp.h> handle all the details of reading
1522 and writing the utmp file.
1524 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1527 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1528 completely POSIX compliant and also implemented the extended functionality
1529 to handle alternate digit representation and alternate era date formats.
1531 * Ulrich Drepper provided an implementation of the `strptime' function
1532 defined in XPG4.2 which transforms a string into a `struct tm' value.
1534 * Paul Eggert provided the tzselect shell script as part of the timezone
1535 code. The shell script makes it easy to select the correct timezone
1538 * The implementation of the malloc family of functions is completely replaced
1539 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1540 The implementation uses the mmap function (if available) and it is
1541 optimized for the use in multi threaded programs.
1543 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1544 functions. This new functionality is usable by specifying a special
1545 salt string and it is compatible with implementation on *BSD systems.
1547 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1548 `getsubopt' to handle second level command line options, `bsd_signal'
1549 to access BSD style `signal' functionality, the obsolete `regexp' style
1552 * the `lchown' function is available on system which support this
1555 * The implementation of the shadow password handling function was contributed
1558 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1560 * POSIX.1g support was added. The <sys/select.h> header is available,
1561 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1562 implementation of `getaddrinfo'.
1566 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1568 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1569 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1571 * The new function `daemon' from 4.4 BSD is useful for server programs that
1572 want to put themselves in the background.
1574 * Joel Sherrill has contributed support for several standalone boards that
1575 run without an operating system.
1577 * `printf', `scanf' and friends now accept a `q' type modifier for long
1578 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1580 * All of the code taken from BSD (notably most of the math and networking
1581 routines) has been updated from the BSD 4.4-Lite release.
1583 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1585 * The new functions `getdomainname' and `setdomainname' fetch or change the
1586 YP/NIS domain name. These are system calls which exist on systems which
1589 * The time zone data files have been updated for the latest international
1592 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1593 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1597 * The C library now includes support for Sun RPC, from Sun's free
1598 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1599 are included. (There is still no support for YP.)
1601 * Tom Quinn has contributed a port of the C library to SGI machines running
1602 Irix 4 (mips-sgi-irix4).
1604 * The new `lockf' function is a simplified interface to the locking
1605 facilities of `fcntl', included for compatibility.
1607 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1609 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1611 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1614 * The error message printed by `assert' for a failed assertion now includes
1615 the name of the program (if using GNU ld) and the name of the calling
1616 function (with versions of GCC that support this).
1618 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1620 * The library now includes the <sys/mman.h> header file and memory
1621 management functions `mmap', `munmap', `mprotect', `msync', and
1622 `madvise', on systems that support those facilities.
1624 * The interface for `mcheck' has changed slightly: the function called to
1625 abort the program when an allocation inconsistency is detected now takes
1626 an argument that indicates the type of failure. The new function
1627 `mprobe' lets you request a consistency check for a particular block at
1628 any time (checks are normally done only when you call `free' or `realloc'
1631 * It is now possible to easily cross-compile the C library, building on one
1632 system a library to run on another machine and/or operating system. All
1633 you need to do is set the variable `HOST_CC' in `configparms' to the
1634 native compiler for programs to run on the machine you are building on (a
1635 few generator programs are used on Unix systems); set `CC' to the
1638 * The new function `fexecve' (only implemented on the GNU system) executes
1639 a program file given a file descriptor already open on the file.
1643 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1644 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1646 * You can set the variable `libprefix' in `configparms' to specify a prefix
1647 to be prepended to installed library files; this makes it easy to install
1648 the GNU C library to be linked as `-lgnuc' or whatever.
1650 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1651 copies a limited number of characters from a string, and returns the
1652 address of the last character written.
1654 * You no longer need to check for whether the installed `stddef.h' is
1655 compatible with the GNU C library. configure now checks for you.
1657 * You can now define a per-stream `fileno' function to convert the
1658 stream's cookie into an integral file descriptor.
1660 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1661 allocates zero bytes of storage, and returns a unique pointer which
1662 you can pass to `realloc' or `free'. The behavior is undefined if
1663 you dereference this pointer.
1665 * The C library now runs on Sony NEWS m68k machines running either
1666 NewsOS 3 or NewsOS 4.
1668 * The new `syscall' function is a system-dependent primitive function
1669 for invoking system calls. It has the canonical behavior on Unix
1670 systems, including unreliable return values for some calls (such as
1671 `pipe', `fork' and `getppid').
1673 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1674 to `EAGAIN', which is the preferred name. On systems whose kernels
1675 use two distinct codes, the C library now translates EWOULDBLOCK to
1676 EAGAIN in every system call function.
1680 * The GNU C Library Reference Manual is now distributed with the library.
1681 `make dvi' will produce a DVI file of the printed manual.
1682 `make info' will produce Info files that you can read on line using C-h i
1683 in Emacs or the `info' program.
1684 Please send comments on the manual to bug-glibc-manual@gnu.org.
1686 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1688 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1690 * Jason Merrill has contributed a port to the Sequent Symmetry running
1691 Dynix version 3 (i386-sequent-dynix).
1693 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1694 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1696 * New function `memory_warnings' lets you arrange to get warnings when
1697 malloc is running out of memory to allocate, like Emacs gives you.
1699 * The C library now contains the relocating allocator used in Emacs 19 for
1700 its editing buffers. This allocator (ralloc) minimizes allocation
1701 overhead and fragmentation by moving allocated regions around whenever it
1702 needs to. You always refer to a ralloc'd region with a "handle" (a
1703 pointer to a pointer--an object of type `void **').
1705 * There is a new `printf' format: `%m' gives you the string corresponding
1706 to the error code in `errno'.
1708 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1709 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1710 pass, the `a' modifier says to fill in a `char **' you pass with a
1713 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1714 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1715 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1717 * `mkstemp' is a traditional Unix function to atomically create and open a
1718 uniquely-named temporary file.
1722 * The standard location for the file that says what the local timezone is
1723 has changed again. It is now `/usr/local/etc/localtime' (or more
1724 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1726 * The distribution no longer contains any files with names longer than 14
1729 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1730 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1732 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1736 * The configuration process has changed quite a bit. The `configure'
1737 script is now used just like the configuration scripts for other GNU
1738 packages. The `sysdeps' directory hierarchy is much rearranged.
1739 The file `INSTALL' explains the new scheme in detail.
1741 * The header files no longer need to be processed into ANSI C and
1742 traditional C versions. There is just one set of files to install, and
1743 it will work with ANSI or old C compilers (including `gcc -traditional').
1745 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1746 MIPS DECStation running Ultrix 4.
1748 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1749 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1750 made itself into a shared library.
1752 * Yet further improved support for the i386, running 4.3 BSD-like systems
1753 (such as Mach 3 with the Unix single-server), or System V.
1755 * New function `strncasecmp' to do case-insensitive string comparison
1756 with limited length.
1758 * New function `strsep' is a reentrant alternative to `strtok'.
1760 * New functions `scandir' and `alphasort' for searching directories.
1762 * New function `setenv' is a better interface to `putenv'.
1764 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1765 function for traversing a directory tree.
1767 * The GNU obstack package is now also part of the C library.
1768 The new function `open_obstack_stream' creates a stdio stream that
1769 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1770 formatted output directly to an obstack.
1772 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1773 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1775 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1777 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1778 things to your strings.
1780 * There are some new test programs: test-fseek, testmb, and testrand.
1782 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1783 These ports are not finished, but are a good starting place for really
1784 supporting those systems.
1786 * `/etc/localtime' is now the standard location for the file that says what
1787 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1788 This follows the general principle that `/etc' is the place for all local
1789 configuration files.
1791 * The C library header files now use `extern "C"' when used by the C++
1792 compiler, so the C library should now work with C++ code.
1794 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1795 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
1798 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1799 function which uses the `merge sort' algorithm, and is said to be
1800 significantly faster than the old GNU `qsort' function. Merge sort is
1801 now the standard `qsort' function. The new algorithm can require a lot
1802 of temporary storage; so, the old sorting function is called when the
1803 required storage is not available.
1805 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1806 provides the Unix `crypt' function, plus some other entry points.
1808 * The code and header files taken from 4.4 BSD have been updated with the
1809 latest files released from Berkeley.
1811 ----------------------------------------------------------------------
1812 Copyright information:
1814 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1815 Free Software Foundation, Inc.
1817 Permission is granted to anyone to make or distribute verbatim copies
1818 of this document as received, in any medium, provided that the
1819 copyright notice and this permission notice are preserved,
1820 thus giving the recipient permission to redistribute in turn.
1822 Permission is granted to distribute modified versions
1823 of this document, or of portions of it,
1824 under the above conditions, provided also that they
1825 carry prominent notices stating who last changed them.
1828 version-control: never