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1 GNU C Library NEWS -- history of user-visible changes. 1999-08-25
3 Copyright (C) 1992, 93, 94, 95, 96, 97, 98, 99 Free Software Foundation, Inc.
4 See the end for copying conditions.
6 Please send GNU C library bug reports using the `glibcbug' script to
7 <bugs@gnu.org>. Questions and suggestions should be send to
8 <bug-glibc@gnu.org>.
9 \f
10 Version 2.2
12 * Thorsten Kukuk added secure mode support to nscd.
14 * Update from Berkeley db 2.7.5.
16 * Wide character I/O streams implemented by Ulrich Drepper.
18 * functions from the extended socket API added by Ulrich Drepper.
20 * Functions feenableexcept and fedisableexcept to control the
21 behaviour of individual exceptions have been added by Andreas Jaeger.
23 \f
24 Version 2.1.2
26 * bug fixes
28 \f
29 Version 2.1.1
31 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
33 * New xdr functions are added; some rpc functions are now 64bit clean.
35 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
37 * Fixed known incompatibilities with glibc 2.0.
39 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
41 * Optimized a number of functions (especially the ELF dynamic loader).
43 * Update timezone data files.
45 * lots of charmaps corrections
47 * some new locale definitions and charmaps
49 \f
50 Version 2.1
52 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
53 conform to POSIX member type requirements. Symbol versions have been
54 adjusted as needed within the library, and for direct use by applications,
55 but there is potential for problems if third-party libraries use
56 struct timeval as part of their interface. This does not present
57 a problem for X and other "essential" system libraries.
59 * An additional locale model to support C++ Standard Library locale
60 model and probably more was implemented by Ulrich Drepper.
62 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
63 symbol level.
65 * Miles Bader provided the `argp' function family to support hierachical
66 command line argument parsing, layered on top of getopt.
68 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
70 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
71 numbers.
73 * scanf recognizes the %a and %A format for scanning floating point numbers.
75 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
76 information and interfaces for the available integer types.
78 * about 130 new math functions were added to implement the ISO C9x math
79 library.
81 * the new header <complex.h> contains definitions of the complex math
82 functions from ISO C 9X.
84 * the new header <tgmath.h> defines generic macros to use complex or
85 real valued functions.
87 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
89 * Andreas Jaeger provided a test suite for the math library.
91 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
93 * Ulrich Drepper added character set conversion functions (iconv).
95 * Optimized string functions have been added.
97 * The localedata addon is now part of glibc.
99 * An implementation of profiling shared libraries was added by Ulrich Drepper.
101 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
102 daemon for NSS (nscd).
104 Missing a better place here are some numbers on improvements. Under
105 Linux 2.1.125 un-tar-ing the kernel sources takes
107 user system wall
109 using local files 12.19s 6.88s 22.91s
111 using NIS 13.92s 8.91s 26.34s
113 using NIS & nscd 10.37s 7.34s 25.30s
115 using NIS+ 27.57s 30.37s 640.46s
117 using NIS+ & nscd 10.25s 7.83s 26.51s
119 using NIS & old nscd [1] 13.83s 8.32s 29.60s
121 Keep in mind that non-namelookup related operations dominate above times.
122 It was just a common complain that using NIS+ unpacking the kernel is
123 horribly slow.
125 [1] The old nscd implementation is not available anymore since it was
126 distributed with glibc up to version 2.0.98 and thus is now replaced.
128 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
130 * Mark Kettenis provided a Hesiod NSS module.
132 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
133 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
135 * rcmd can now handle netgroups (Dick Streefland).
137 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
138 Bambrough.
140 * Support for the IPv6 protocol has been added to the socket API, as per the
141 latest draft standards.
143 * Support for Linux 2.2 has been added.
145 * Interface changes relative to the latest 2.0.x release:
146 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
147 addseverity NEW: Unix98
148 alphasort64 NEW: LFS
149 argp_err_exit_status NEW: argp, GNU ext
150 argp_error NEW: argp, GNU ext
151 argp_failure NEW: argp, GNU ext
152 argp_help NEW: argp, GNU ext
153 argp_parse NEW: argp, GNU ext
154 argp_program_bug_address NEW: argp, GNU ext
155 argp_program_version NEW: argp, GNU ext
156 argp_program_version_hook NEW: argp, GNU ext
157 argp_state_help NEW: argp, GNU ext
158 argp_usage NEW: argp, GNU ext
159 authdes_create NEW: Secure RPC
160 authdes_getucred NEW: Secure RPC
161 authdes_pk_create NEW: Secure RPC
162 backtrace NEW: GNU ext.
163 backtrace_symbols NEW: GNU ext.
164 backtrace_symbols_fd NEW: GNU ext.
165 cacos NEW: ISO C 9x
166 cacosf NEW: ISO C 9x
167 cacosh NEW: ISO C 9x
168 cacoshf NEW: ISO C 9x
169 cacoshl NEW: ISO C 9x
170 cacosl NEW: ISO C 9x
171 capget NEW: kernel
172 capset NEW: kernel
173 carg NEW: ISO C 9x
174 cargf NEW: ISO C 9x
175 cargl NEW: ISO C 9x
176 casin NEW: ISO C 9x
177 casinf NEW: ISO C 9x
178 casinh NEW: ISO C 9x
179 casinhf NEW: ISO C 9x
180 casinhl NEW: ISO C 9x
181 casinl NEW: ISO C 9x
182 catan NEW: ISO C 9x
183 catanf NEW: ISO C 9x
184 catanh NEW: ISO C 9x
185 catanhf NEW: ISO C 9x
186 catanhl NEW: ISO C 9x
187 catanl NEW: ISO C 9x
188 cbc_crypt NEW: Secure RPC
189 ccos NEW: ISO C 9x
190 ccosf NEW: ISO C 9x
191 ccosh NEW: ISO C 9x
192 ccoshf NEW: ISO C 9x
193 ccoshl NEW: ISO C 9x
194 ccosl NEW: ISO C 9x
195 cexp NEW: ISO C 9x
196 cexpf NEW: ISO C 9x
197 cexpl NEW: ISO C 9x
198 cimag NEW: ISO C 9x
199 cimagf NEW: ISO C 9x
200 cimagl NEW: ISO C 9x
201 clearerr_locked REMOVED
202 clntunix_create NEW: sunrpc ext
203 clog NEW: ISO C 9x
204 clog10 NEW: ISO C 9x
205 clog10f NEW: ISO C 9x
206 clog10l NEW: ISO C 9x
207 clogf NEW: ISO C 9x
208 clogl NEW: ISO C 9x
209 conj NEW: ISO C 9x
210 conjf NEW: ISO C 9x
211 conjl NEW: ISO C 9x
212 cpow NEW: ISO C 9x
213 cpowf NEW: ISO C 9x
214 cpowl NEW: ISO C 9x
215 cproj NEW: ISO C 9x
216 cprojf NEW: ISO C 9x
217 cprojl NEW: ISO C 9x
218 creal NEW: ISO C 9x
219 crealf NEW: ISO C 9x
220 creall NEW: ISO C 9x
221 creat64 NEW: LFS
222 csin NEW: ISO C 9x
223 csinf NEW: ISO C 9x
224 csinh NEW: ISO C 9x
225 csinhf NEW: ISO C 9x
226 csinhl NEW: ISO C 9x
227 csinl NEW: ISO C 9x
228 csqrt NEW: ISO C 9x
229 csqrtf NEW: ISO C 9x
230 csqrtl NEW: ISO C 9x
231 ctan NEW: ISO C 9x
232 ctanf NEW: ISO C 9x
233 ctanh NEW: ISO C 9x
234 ctanhf NEW: ISO C 9x
235 ctanhl NEW: ISO C 9x
236 ctanl NEW: ISO C 9x
237 des_setparity NEW: Secure RPC
238 ecb_crypt NEW: Secure RPC
239 endutxent NEW: Unix98
240 exp10 NEW: ISO C 9x
241 exp10f NEW: ISO C 9x
242 exp10l NEW: ISO C 9x
243 exp2 NEW: ISO C 9x
244 exp2f NEW: ISO C 9x
245 exp2l NEW: ISO C 9x
246 fattach NEW: STREAMS
247 fdetach NEW: STREAMS
248 fdim NEW: ISO C 9x
249 fdimf NEW: ISO C 9x
250 fdiml NEW: ISO C 9x
251 feclearexcept NEW: ISO C 9x
252 fegetenv NEW: ISO C 9x
253 fegetexceptflag NEW: ISO C 9x
254 fegetround NEW: ISO C 9x
255 feholdexcept NEW: ISO C 9x
256 feof_locked REMOVED
257 feraiseexcept NEW: ISO C 9x
258 ferror_locked REMOVED
259 fesetenv NEW: ISO C 9x
260 fesetexceptflag NEW: ISO C 9x
261 fesetround NEW: ISO C 9x
262 fetestexcept NEW: ISO C 9x
263 feupdateenv NEW: ISO C 9x
264 fflush_locked REMOVED
265 ffsl NEW: GNU ext.
266 ffsll NEW: GNU ext.
267 fgetpos64 NEW: LFS
268 fgets_unlocked NEW: GNU ext.
269 fileno_locked REMOVED
270 fma NEW: ISO C 9x
271 fmaf NEW: ISO C 9x
272 fmal NEW: ISO C 9x
273 fmax NEW: ISO C 9x
274 fmaxf NEW: ISO C 9x
275 fmaxl NEW: ISO C 9x
276 fmin NEW: ISO C 9x
277 fminf NEW: ISO C 9x
278 fminl NEW: ISO C 9x
279 fmtmsg NEW: Unix98
280 fopen64 NEW: LFS
281 fputc_locked REMOVED
282 fputs_unlocked NEW: GNU ext.
283 fread_unlocked NEW: GNU ext.
284 freopen64 NEW: LFS
285 fseeko NEW: Unix98
286 fsetpos64 NEW: LFS
287 fstatfs64 NEW: LFS
288 fstatvfs NEW: Unix98
289 fstatvfs64 NEW: LFS
290 ftello NEW: Unix98
291 ftello64 NEW: LFS
292 ftruncate64 NEW: LFS
293 ftw64 NEW: LFS
294 fwrite_unlocked NEW: GNU ext.
295 gai_strerror NEW: IPv6
296 gamma_r REMOVED
297 gammaf_r REMOVED
298 gammal_r REMOVED
299 getchar_locked REMOVED
300 getdate NEW: Unix98
301 getdate_err NEW: Unix98
302 getdate_r NEW: GNU ext.
303 getmsg NEW: STREAMS
304 getnameinfo NEW: IPv6
305 getnetname NEW: Secure RPC
306 getpmsg NEW: STREAMS
307 getpt NEW: Unix98 PTY
308 getrlimit64 NEW: LFS
309 getutxent NEW: Unix98
310 getutxid NEW: Unix98
311 getutxline NEW: Unix98
312 glob64 NEW: GNU ext.
313 globfree64 NEW: GNU ext.
314 gnu_get_libc_release NEW: GNU ext.
315 gnu_get_libc_version NEW: GNU ext.
316 grantpt NEW: Unix98 PTY
317 host2netname NEW: Secure RPC
318 iconv NEW: iconv
319 iconv_close NEW: iconv
320 iconv_open NEW: iconv
321 if_freenameindex NEW: IPv6
322 if_indextoname NEW: IPv6
323 if_nameindex NEW: IPv6
324 if_nametoindex NEW: IPv6
325 in6addr_any NEW: IPv6
326 in6addr_loopback NEW: IPv6
327 inet6_isipv4mapped NEW: IPv6
328 isastream NEW: STREAMS
329 iswblank NEW: GNU ext.
330 key_decryptsession NEW: Secure RPC
331 key_decryptsession_pk NEW: Secure RPC
332 key_encryptsession NEW: Secure RPC
333 key_encryptsession_pk NEW: Secure RPC
334 key_gendes NEW: Secure RPC
335 key_get_conv NEW: Secure RPC
336 key_secretkey_is_set NEW: Secure RPC
337 key_setnet NEW: Secure RPC
338 key_setsecret NEW: Secure RPC
339 llrint NEW: ISO C 9x
340 llrintf NEW: ISO C 9x
341 llrintl NEW: ISO C 9x
342 llround NEW: ISO C 9x
343 llroundf NEW: ISO C 9x
344 llroundl NEW: ISO C 9x
345 log2 NEW: ISO C 9x
346 log2f NEW: ISO C 9x
347 log2l NEW: ISO C 9x
348 lrint NEW: ISO C 9x
349 lrintf NEW: ISO C 9x
350 lrintl NEW: ISO C 9x
351 lround NEW: ISO C 9x
352 lroundf NEW: ISO C 9x
353 lroundl NEW: ISO C 9x
354 lseek64 NEW: LFS
355 makecontext NEW: Unix98
356 mempcpy NEW: GNU ext.
357 mmap64 NEW: LFS
358 moncontrol REMOVED
359 modify_ldt NEW: kernel
360 nan NEW: ISO C 9x
361 nanf NEW: ISO C 9x
362 nanl NEW: ISO C 9x
363 nearbyint NEW: ISO C 9x
364 nearbyintf NEW: ISO C 9x
365 nearbyintl NEW: ISO C 9x
366 netname2host NEW: Secure RPC
367 netname2user NEW: Secure RPC
368 nexttoward NEW: ISO C 9x
369 nexttowardf NEW: ISO C 9x
370 nexttowardl NEW: ISO C 9x
371 nftw NEW: Unix98
372 nftw64 NEW: LFS
373 open64 NEW: LFS
374 passwd2des NEW: Secure RPC
375 pow10 NEW: GNU ext.
376 pow10f NEW: GNU ext.
377 pow10l NEW: GNU ext.
378 pread NEW: Unix98
379 pread64 NEW: LFS
380 printf_size NEW: GNU ext.
381 printf_size_info NEW: GNU ext.
382 profil_counter REMOVED
383 pthread_mutexattr_getkind_np REPLACED
384 pthread_mutexattr_setkind_np REPLACED
385 ptsname NEW: Unix98 PTY
386 ptsname_r NEW: Unix98 PTY
387 putc_locked REMOVED
388 putchar_locked REMOVED
389 putgrent NEW: GNU ext.
390 putmsg NEW: STREAMS
391 putpmsg NEW: STREAMS
392 pututxline NEW: Unix98
393 pwrite NEW: Unix98
394 pwrite64 NEW: LFS
395 readdir64 NEW: LFS
396 readdir64_r NEW: LFS
397 remquo NEW: ISO C 9x
398 remquof NEW: ISO C 9x
399 remquol NEW: ISO C 9x
400 round NEW: ISO C 9x
401 roundf NEW: ISO C 9x
402 roundl NEW: ISO C 9x
403 rtime NEW: GNU ext.
404 scalbln NEW: ISO C 9x
405 scalblnf NEW: ISO C 9x
406 scalblnl NEW: ISO C 9x
407 scandir64 NEW: LFS
408 sendfile NEW: kernel
409 setcontext NEW: Unix98
410 setrlimit64 NEW: LFS
411 setutxent NEW: Unix98
412 sighold NEW: Unix98
413 sigignore NEW: Unix98
414 sigqueue NEW: POSIX.1b
415 sigrelse NEW: Unix98
416 sigset NEW: POSIX.1b
417 sigtimedwait NEW: POSIX.1b
418 sigwaitinfo NEW: POSIX.1b
419 sincos NEW: GNU ext.
420 sincosf NEW: GNU ext.
421 sincosl NEW: GNU ext.
422 statfs64 NEW: LFS
423 statvfs NEW: Unix98
424 statvfs64 NEW: LFS
425 strcasestr NEW: GNU ext.
426 strtoimax NEW: ISO C 9x
427 strtoumax NEW: ISO C 9x
428 strverscmp NEW: GNU ext.
429 svcauthdes_stats NEW: Secure RPC
430 svcunix_create NEW: sunrpc etx
431 svcunixfd_create NEW: sunrpc ext
432 swapcontext NEW: Unix98
433 tcgetsid NEW: Unix98 PTY
434 tdestroy NEW: GNU ext.
435 tgamma NEW: ISO C 9x
436 tgammaf NEW: ISO C 9x
437 tgammal NEW: ISO C 9x
438 tmpfile64 NEW: LFS
439 trunc NEW: ISO C 9x
440 truncate64 NEW: LFS
441 truncf NEW: ISO C 9x
442 truncl NEW: ISO C 9x
443 umount2 NEW: kernel
444 unlockpt NEW: Unix98 PTY
445 updwtmpx NEW: Unix98
446 user2netname NEW: Secure RPC
447 utmpxname NEW: Unix98
448 versionsort NEW: GNU ext.
449 versionsort64 NEW: GNU ext.
450 waitid NEW: Unix98
451 wcscasecmp NEW: GNU ext.
452 wcsncasecmp NEW: GNU ext.
453 wcsnlen NEW: GNU ext.
454 wcstoimax NEW: ISO C 9x
455 wcstoll NEW: ISO C 9x
456 wcstoull NEW: ISO C 9x
457 wcstoumax NEW: ISO C 9x
458 wcswcs NEW: Unix98
459 wordexp NEW: POSIX.2
460 wordfree NEW: POSIX.2
461 write_profiling REMOVED
462 xdecrypt NEW: Secure RPC
463 xdr_authdes_cred NEW: Secure RPC
464 xdr_authdes_verf NEW: Secure RPC
465 xdr_cryptkeyarg NEW: Secure RPC
466 xdr_cryptkeyarg2 NEW: Secure RPC
467 xdr_cryptkeyres NEW: Secure RPC
468 xdr_getcredres NEW: Secure RPC
469 xdr_key_netstarg NEW: Secure RPC
470 xdr_key_netstres NEW: Secure RPC
471 xdr_keybuf NEW: Secure RPC
472 xdr_keystatus NEW: Secure RPC
473 xdr_netnamestr NEW: Secure RPC
474 xdr_sizeof NEW: Secure RPC
475 xdr_unixcred NEW: sunrpc ext
476 xencrypt NEW: Secure RPC
477 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
478 \f
479 Version 2.0.6
481 * more bug fixes
483 \f
484 Version 2.0.5
486 * more bug fixes
488 * inet_ntoa is thread-safe
490 * updwtmp is moved from libutil to libc
492 * rewrite of cbrt function
494 * update of timezone data
495 \f
496 Version 2.0.4
498 * more bug fixes
499 \f
500 Version 2.0.3
502 * more bug fixes
503 \f
504 Version 2.0.2
506 * more bug fixes
508 * add atoll function
510 * fix complex problems in Berkeley DB code
512 * fix math functions
513 \f
514 Version 2.0.1
516 * fixed lots of header problems (especially Linux/GNU specific)
518 * dynamic loader preserves all registers
520 * Roland McGrath provided support for handling of auxiliary objects in
521 the ELF dynamic loader.
523 * support for parallel builds is improved
524 \f
525 Version 2.0
527 * GNU extensions are no longer declared by default. To enable them you
528 must define the macro `_GNU_SOURCE' in your program or compile with
529 `-D_GNU_SOURCE'.
531 * The library has changed from using GNU ld symbol aliases to using weak
532 symbols where available. The ELF object file format supports weak
533 symbols; GNU ld also supports weak symbols in the a.out format. (There
534 is also now support for other GNU ld extensions in ELF. Use the
535 `--with-elf' option to configure to indicate you have ELF, and
536 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
537 of many files which contained only symbol aliases, reducing the size of
538 the source and the compiled library; many other files were renamed to
539 less cryptic names previously occupied by the symbol alias files.
540 There is a new header file <elf.h> for programs which operate on
541 files in the ELF format.
543 * Converted to Autoconf version 2, so `configure' has more options.
544 Run `configure --help' to see the details.
546 * The library can now be configured to build profiling, highly-optimized
547 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
548 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
549 `configure' enable building these extra libraries. The shared library is
550 built by default when using both ELF and GNU ld. When shared libraries
551 are enabled, the new library `-ldl' is available for arbitrary run-time
552 loading of shared objects; its interface is defined in <dlfcn.h>. The
553 new header file <link.h> gives access to the internals of the run-time
554 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
555 application of same name on other systems and it provides information
556 about dynamically linked binaries.
558 * The C library now provides the run-time support code for profiling
559 executables compiled with `-pg'. Programs can control the profiling code
560 through the interface in <sys/gmon.h>. The `gmon.out' files written by
561 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
562 the support for this file format was contributed by David Mosberger-Tang.
564 * The math code has been replaced with a math library based on fdlibm from
565 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
566 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
567 functions. The math functions now reside in a separate library, so
568 programs using them will need to use `-lm' their linking commands.
570 * John C. Bowman contributed optimized ix87 assembler inline functions.
572 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
573 mechanism similar to that found in Solaris 2. This is now used for the
574 group, passwd, hosts, networks, services, protocols, rpc, ethers,
575 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
576 file controls what services are used for each individual database. This
577 works by loading shared libraries with names specified in `nsswitch.conf',
578 so service modules can be changed or added at any time without even
579 relinking any program. Currently there are the file, db, and NIS based
580 NSS services available.
582 * The new functions `strtoq' and `strtouq' parse integer values from
583 strings, like `strtol' and `strtoul', but they return `long long int' and
584 `unsigned long long int' values, respectively (64-bit quantities).
586 * The new functions `strtof' and `strtold' parse floating-point values from
587 strings, like `strtod', but they return `float' and `long double' values,
588 respectively (on some machines `double' and `long double' are the same).
590 * Ulrich Drepper has contributed new implementations of the floating-point
591 printing and reading code used in the `printf' family of functions and
592 `strtod', `strtof', and `strtold'. These new functions are perfectly
593 accurate, and much faster than the old ones.
595 * The implementation of the POSIX locale model was completely rewritten by
596 Ulrich Drepper. This includes the new programs `localedef' and `locale'
597 to compile the POSIX locale definition.
599 * The former dummy implementations of the strcoll and strxfrm function are
600 now replaced by fully functional code contributed by Ulrich Drepper. The
601 collation information comes from the POSIX locale definitions.
603 * The new header <langinfo.h> defines an interface for accessing
604 various locale-dependent data (using the locale chosen with `setlocale').
606 * Ulrich Drepper has contributed a new suite of functions for operation on
607 wide-character and multibyte-character strings, in <wchar.h>;
608 and classification and case conversion of wide characters, in <wctype.h>.
609 These new functions are conforming to the ISO C, Amendement 1 specification.
611 * There is now a second implementation of the standard I/O library available.
612 It comes from GNU libg++ as was written by Per Bothner, heavily modified
613 by Hongjiu Lu and made thread safe by Ulrich Drepper.
615 * You can now use positional parameter specifications in format strings
616 for the `printf' and `scanf' families of functions. For example,
617 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
618 ``Number 6, Mr Jones''. This is mainly useful when providing different
619 format strings for different languages, whose grammars may dictate
620 different orderings of the values being printed. To support this
621 feature, the interface for `register_printf_handler' has changed; see
622 the header file <printf.h> for details.
624 * The `printf' and `scanf' families of functions now understand a new
625 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
626 to group numbers as indicated by the locale; for `scanf' and friends, this
627 says to accept as valid only a number with all the proper grouping
628 separators in the right places. In the default "C" locale, numbers are
629 not grouped; but locales for specific countries will define the usual
630 conventions (i.e. separate thousands with `,' in the US locale).
632 * The pgrp functions have been regularized, slightly incompatibly but much
633 less confusingly. The core functions are now `getpgid' and `setpgid',
634 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
635 argument) and BSD `setpgrp' (identical to `setpgid') functions are
636 provided for compatibility. There is no longer an incompatible `getpgrp'
637 with an argument declared under _BSD_SOURCE; no BSD code uses it.
639 * The new header file <fts.h> and suite of functions simplify programs that
640 operate on directory trees. This code comes from 4.4 BSD.
642 * The resolver code has been updated from the BIND 4.9.5-P1 release.
643 Parts of the code were heavily modified by Ulrich Drepper to fit in the
644 NSS scheme used in glibc.
646 * There is a new malloc debugging hook `__memalign_hook'.
648 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
649 `unsigned int' in <sys/types.h>. These are for compatibility only and
650 their use is discouraged.
652 * The `-lmcheck' library to enable standard malloc debugging hooks is now
653 done differently, so that it works even without GNU ld.
655 * New function `euidaccess' checks allowed access to a file like `access',
656 but using the effective IDs instead of the real IDs.
658 * The time zone data files have been updated for the latest and greatest
659 local time conventions of the countries of the world.
661 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
662 see <dirent.h>.
664 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
665 for formatting floating-point numbers. They are provided only for
666 compatibility; new programs should use `sprintf' instead. There are
667 also equivalent function for the `long double' floating-point type and
668 all functions also exist in a reentrant form.
670 * The new auxiliary library `-lutil' from 4.4 BSD contains various
671 functions for maintaining the login-record files (primarily of use to
672 system programs such as `login'), and convenient functions for
673 allocating and initializing a pseudo-terminal (pty) device.
675 * Ulrich Drepper has contributed new support for System V style
676 shared memory and IPC on systems that support it.
678 * Ulrich Drepper has contributed several miscellaneous new functions found
679 in System V: The `hsearch' family of functions provide an effective
680 implementation of hash tables; `a64l' and `l64a' provide a very simple
681 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
682 number generator.
684 * Ulrich Drepper has contributed new reentrant counterparts for the
685 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
687 * Ulrich Drepper has contributed new, highly-optimized versions of several
688 string functions for the i486/Pentium family of processors.
690 * Ulrich Drepper has updated the Linux-specific code, based largely
691 on work done in Hongjiu Lu's version of GNU libc for Linux.
692 The GNU library now supports Linux versions 2.0.10 and later,
693 using the ELF object file format (i[3456]86-*-linux).
695 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
697 * David Mosberger-Tang and Richard Henderson have ported the C library
698 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
699 dynamic linking support for ELF/Alpha.
701 * Richard Henderson contributed several Alpha optimized assembler function
702 for arithmetic and string handling.
704 * Ulrich Drepper has contributed a new set of message catalog functions to
705 support multiple languages using the <libintl.h> interface, for use with
706 his new package GNU gettext. Translation volunteers have contributed
707 catalogs of the library's messages in Spanish, German, and Korean.
709 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
710 program and the `catgets' function for reading the catalog files it
711 creates. (The <libintl.h> interface is preferred; we include the
712 <nl_types.h> interface using `catgets' only for source compatibility with
713 programs already written to use it.)
715 * New header file <values.h> gives SVID-compatible names for <limits.h>
716 constants.
718 * Various new macros, declarations, and small header files for compatibility
719 with 4.4 BSD.
721 * New function `group_member' is a convenient way to check if a process has
722 a given effective group ID.
724 * When using GCC 2.7 and later, the socket functions are now declared in a
725 special way so that passing an argument of type `struct sockaddr_in *',
726 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
727 `struct sockaddr *' type, does not generate a type-clash warning.
729 * New function `error' declared in header file <error.h> is a convenient
730 function for printing error messages and optionally exiting; this is the
731 canonical function used in GNU programs. The new functions `err', `warn',
732 and friends in header file <err.h> are the canonical 4.4 BSD interface for
733 doing the same thing.
735 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
736 POSIX.2 `glob' function to do ~ and {...} expansion.
738 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
739 `clearenv' which is used in POSIX.9 is also available.
741 * New function `getsid' returns session ID number on systems that support it.
743 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
744 files <db.h> and <mpool.h> provide a rich set of functions for several
745 types of simple databases stored in memory and in files, and <ndbm.h> is
746 an old `ndbm'-compatible interface using the `db' functions. Link with
747 `-ldb' to get these functions.
749 * New macro `strdupa' copies a string like `strdup', but uses local stack
750 space from `alloca' instead of dynamic heap space from `malloc'.
752 * New function `strnlen' is like `strlen' but searches only a given maximum
753 number of characters for the null terminator. `stpncpy', `strndup' and
754 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
755 function.
757 * New function `statfs' in header <sys/statfs.h>.
759 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
760 provide convenient functions for operating on blocks of null-terminated
761 strings.
763 * A new suite of functions in <utmp.h> handle all the details of reading
764 and writing the utmp file.
766 * An implementation of the NIS/YP(tm) based NSS service was contributed by
767 Thorsten Kukuk.
769 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
770 completely POSIX compliant and also implemented the extended functionality
771 to handle alternate digit representation and alternate era date formats.
773 * Ulrich Drepper provided an implementation of the `strptime' function
774 defined in XPG4.2 which transforms a string into a `struct tm' value.
776 * Paul Eggert provided the tzselect shell script as part of the timezone
777 code. The shell script makes it easy to select the correct timezone
778 specification.
780 * The implementation of the malloc family of functions is completely replaced
781 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
782 The implementation uses the mmap function (if available) and it is
783 optimized for the use in multi threaded programs.
785 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
786 functions. This new functionality is usable by specifying a special
787 salt string and it is compatible with implementation on *BSD systems.
789 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
790 `getsubopt' to handle second level command line options, `bsd_signal'
791 to access BSD style `signal' functionality, the obsolete `regexp' style
792 expression matcher.
794 * the `lchown' function is available on system which support this
795 functionality.
797 * The implementation of the shadow password handling function was contributed
798 by Ulrich Drepper.
800 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
802 * POSIX.1g support was added. The <sys/select.h> header is available,
803 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
804 implementation of `getaddrinfo'.
805 \f
806 Version 1.09
808 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
810 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
811 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
813 * The new function `daemon' from 4.4 BSD is useful for server programs that
814 want to put themselves in the background.
816 * Joel Sherrill has contributed support for several standalone boards that
817 run without an operating system.
819 * `printf', `scanf' and friends now accept a `q' type modifier for long
820 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
822 * All of the code taken from BSD (notably most of the math and networking
823 routines) has been updated from the BSD 4.4-Lite release.
825 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
827 * The new functions `getdomainname' and `setdomainname' fetch or change the
828 YP/NIS domain name. These are system calls which exist on systems which
829 have YP (aka NIS).
831 * The time zone data files have been updated for the latest international
832 conventions.
834 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
835 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
836 \f
837 Version 1.08
839 * The C library now includes support for Sun RPC, from Sun's free
840 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
841 are included. (There is still no support for YP.)
843 * Tom Quinn has contributed a port of the C library to SGI machines running
844 Irix 4 (mips-sgi-irix4).
846 * The new `lockf' function is a simplified interface to the locking
847 facilities of `fcntl', included for compatibility.
849 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
851 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
853 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
854 compatibility.
856 * The error message printed by `assert' for a failed assertion now includes
857 the name of the program (if using GNU ld) and the name of the calling
858 function (with versions of GCC that support this).
860 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
862 * The library now includes the <sys/mman.h> header file and memory
863 management functions `mmap', `munmap', `mprotect', `msync', and
864 `madvise', on systems that support those facilities.
866 * The interface for `mcheck' has changed slightly: the function called to
867 abort the program when an allocation inconsistency is detected now takes
868 an argument that indicates the type of failure. The new function
869 `mprobe' lets you request a consistency check for a particular block at
870 any time (checks are normally done only when you call `free' or `realloc'
871 on a block).
873 * It is now possible to easily cross-compile the C library, building on one
874 system a library to run on another machine and/or operating system. All
875 you need to do is set the variable `HOST_CC' in `configparms' to the
876 native compiler for programs to run on the machine you are building on (a
877 few generator programs are used on Unix systems); set `CC' to the
878 cross-compiler.
880 * The new function `fexecve' (only implemented on the GNU system) executes
881 a program file given a file descriptor already open on the file.
882 \f
883 Version 1.07
885 * Brendan Kehoe has contributed most of a port to the DEC Alpha
886 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
888 * You can set the variable `libprefix' in `configparms' to specify a prefix
889 to be prepended to installed library files; this makes it easy to install
890 the GNU C library to be linked as `-lgnuc' or whatever.
892 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
893 copies a limited number of characters from a string, and returns the
894 address of the last character written.
896 * You no longer need to check for whether the installed `stddef.h' is
897 compatible with the GNU C library. configure now checks for you.
899 * You can now define a per-stream `fileno' function to convert the
900 stream's cookie into an integral file descriptor.
902 * ``malloc (0)'' no longer returns a null pointer. Instead, it
903 allocates zero bytes of storage, and returns a unique pointer which
904 you can pass to `realloc' or `free'. The behavior is undefined if
905 you dereference this pointer.
907 * The C library now runs on Sony NEWS m68k machines running either
908 NewsOS 3 or NewsOS 4.
910 * The new `syscall' function is a system-dependent primitive function
911 for invoking system calls. It has the canonical behavior on Unix
912 systems, including unreliable return values for some calls (such as
913 `pipe', `fork' and `getppid').
915 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
916 to `EAGAIN', which is the preferred name. On systems whose kernels
917 use two distinct codes, the C library now translates EWOULDBLOCK to
918 EAGAIN in every system call function.
919 \f
920 Version 1.06
922 * The GNU C Library Reference Manual is now distributed with the library.
923 `make dvi' will produce a DVI file of the printed manual.
924 `make info' will produce Info files that you can read on line using C-h i
925 in Emacs or the `info' program.
926 Please send comments on the manual to bug-glibc-manual@gnu.org.
928 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
930 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
932 * Jason Merrill has contributed a port to the Sequent Symmetry running
933 Dynix version 3 (i386-sequent-dynix).
935 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
936 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
938 * New function `memory_warnings' lets you arrange to get warnings when
939 malloc is running out of memory to allocate, like Emacs gives you.
941 * The C library now contains the relocating allocator used in Emacs 19 for
942 its editing buffers. This allocator (ralloc) minimizes allocation
943 overhead and fragmentation by moving allocated regions around whenever it
944 needs to. You always refer to a ralloc'd region with a "handle" (a
945 pointer to a pointer--an object of type `void **').
947 * There is a new `printf' format: `%m' gives you the string corresponding
948 to the error code in `errno'.
950 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
951 or `%[' conversion, but instead of filling in a fixed-sized buffer you
952 pass, the `a' modifier says to fill in a `char **' you pass with a
953 malloc'd string.
955 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
956 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
957 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
959 * `mkstemp' is a traditional Unix function to atomically create and open a
960 uniquely-named temporary file.
961 \f
962 Version 1.05
964 * The standard location for the file that says what the local timezone is
965 has changed again. It is now `/usr/local/etc/localtime' (or more
966 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
968 * The distribution no longer contains any files with names longer than 14
969 characters.
971 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
972 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
974 * New functions `ttyslot' and `syslog' from 4.4 BSD.
975 \f
976 Version 1.04
978 * The configuration process has changed quite a bit. The `configure'
979 script is now used just like the configuration scripts for other GNU
980 packages. The `sysdeps' directory hierarchy is much rearranged.
981 The file `INSTALL' explains the new scheme in detail.
983 * The header files no longer need to be processed into ANSI C and
984 traditional C versions. There is just one set of files to install, and
985 it will work with ANSI or old C compilers (including `gcc -traditional').
987 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
988 MIPS DECStation running Ultrix 4.
990 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
991 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
992 made itself into a shared library.
994 * Yet further improved support for the i386, running 4.3 BSD-like systems
995 (such as Mach 3 with the Unix single-server), or System V.
997 * New function `strncasecmp' to do case-insensitive string comparison
998 with limited length.
1000 * New function `strsep' is a reentrant alternative to `strtok'.
1002 * New functions `scandir' and `alphasort' for searching directories.
1004 * New function `setenv' is a better interface to `putenv'.
1006 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1007 function for traversing a directory tree.
1009 * The GNU obstack package is now also part of the C library.
1010 The new function `open_obstack_stream' creates a stdio stream that
1011 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1012 formatted output directly to an obstack.
1014 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1015 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1017 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1019 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1020 things to your strings.
1022 * There are some new test programs: test-fseek, testmb, and testrand.
1024 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1025 These ports are not finished, but are a good starting place for really
1026 supporting those systems.
1028 * `/etc/localtime' is now the standard location for the file that says what
1029 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1030 This follows the general principle that `/etc' is the place for all local
1031 configuration files.
1033 * The C library header files now use `extern "C"' when used by the C++
1034 compiler, so the C library should now work with C++ code.
1036 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1037 bcmp, bzero, and ffs.
1039 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1040 function which uses the `merge sort' algorithm, and is said to be
1041 significantly faster than the old GNU `qsort' function. Merge sort is
1042 now the standard `qsort' function. The new algorithm can require a lot
1043 of temporary storage; so, the old sorting function is called when the
1044 required storage is not available.
1046 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1047 provides the Unix `crypt' function, plus some other entry points.
1048 Because of the United States export restriction on DES implementations,
1049 we are distributing this code separately from the rest of the C library.
1050 There is an extra distribution tar file just for crypt; it is called
1051 `glibc-VERSION-crypt.tar.Z', e.g. `glibc-1.04-crypt.tar.Z'. You can just
1052 unpack the crypt distribution along with the rest of the C library and
1053 build; you can also build the library without getting crypt. Users
1054 outside the USA can get the crypt distribution via anonymous FTP from
1055 ftp.uni-c.dk [129.142.6.74], or another archive site outside the U.S.
1057 * The code and header files taken from 4.4 BSD have been updated with the
1058 latest files released from Berkeley.
1059 \f
1060 ----------------------------------------------------------------------
1061 Copyright information:
1063 Copyright (C) 1992, 93, 94, 95, 96 Free Software Foundation, Inc.
1065 Permission is granted to anyone to make or distribute verbatim copies
1066 of this document as received, in any medium, provided that the
1067 copyright notice and this permission notice are preserved,
1068 thus giving the recipient permission to redistribute in turn.
1070 Permission is granted to distribute modified versions
1071 of this document, or of portions of it,
1072 under the above conditions, provided also that they
1073 carry prominent notices stating who last changed them.
1074 \f
1075 Local variables:
1076 version-control: never
1077 end: