1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
10 * The minimum Linux kernel version that this version of the GNU C Library
11 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
12 kernel version 2.6.32 or later suffices (on architectures that already
13 required kernel versions more recent than 3.2, those requirements remain
14 unchanged). Linux 3.2 or later kernel headers are required on all
17 * The pap_AN locale has been deleted. This has been deprecated for a long
18 time. It has been replaced by pap_AW & pap_CW, both of which have long
19 been included in previous releases.
21 * The readdir_r and readdir64_r functions have been deprecated. It is
22 recommended to use readdir and readdir64 instead.
24 * The type “union wait” has been removed. It was deprecated in the early
25 1990s and never part of POSIX. Application code should use the int type
26 instead of “union wait”.
28 * A new NSS action is added to facilitate large distributed system
29 administration. The action, MERGE, allows remote user stores like LDAP
30 to be merged into local user stores like /etc/groups in order to provide
31 easy to use, updated, and managed sets of merged credentials. The new
32 action can be used by configuring it in /etc/nsswitch.conf:
33 group: files [SUCCESS=merge] nis
34 Implemented by Stephen Gallagher (Red Hat).
36 Security related changes:
38 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
39 could result in a stack overflow when getnetbyname was called with an
40 overly long name. (CVE-2016-3075)
42 * Previously, getaddrinfo copied large amounts of address data to the stack,
43 even after the fix for CVE-2013-4458 has been applied, potentially
44 resulting in a stack overflow. getaddrinfo now uses a heap allocation
45 instead. Reported by Michael Petlan. (CVE-2016-3706)
47 The following bugs are resolved with this release:
49 [The release manager will add the list generated by
50 scripts/list-fixed-bugs.py just before the release.]
54 * Unicode 8.0.0 Support: Character encoding, character type info, and
55 transliteration tables are all updated to Unicode 8.0.0, using new
56 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
57 These updates cause user visible changes, such as the fixes for bugs
60 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
61 kernel-internal CPU set size. This means that requests that change the
62 CPU affinity which failed before (for example, an all-ones CPU mask) will
63 now succeed. Applications that need to determine the effective CPU
64 affinities need to call sched_getaffinity or pthread_getaffinity_np after
65 setting it because the kernel can adjust it (and the previous size check
66 would not detect this in the majority of cases).
68 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
69 the following new symbols are used: fts64_children, fts64_close,
70 fts64_open, fts64_read and fts64_set.
72 * getaddrinfo now detects certain invalid responses on an internal netlink
73 socket. If such responses are received, an affected process will
74 terminate with an error message of "Unexpected error <number> on netlink
75 descriptor <number>" or "Unexpected netlink response of size <number> on
76 descriptor <number>". The most likely cause for these errors is a
77 multi-threaded application which erroneously closes and reuses the netlink
78 file descriptor while it is used by getaddrinfo.
80 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
81 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
82 unnecessary serialization of memory allocation requests across threads.
83 The defect is now corrected. Users should see a substantial increase in
84 the concurent throughput of allocation requests for applications which
85 trigger this bug. Affected applications typically create and
86 destroy threads frequently. (Bug 19048 was reported and analyzed by
89 * There is now a --disable-timezone-tools configure option for disabling the
90 building and installing of the timezone related utilities (zic, zdump, and
91 tzselect). This is useful for people who build the timezone data and code
92 independent of the GNU C Library.
94 * The obsolete header <regexp.h> has been removed. Programs that require
95 this header must be updated to use <regex.h> instead.
97 * The obsolete functions bdflush, create_module, get_kernel_syms,
98 query_module and uselib are no longer available to newly linked binaries;
99 the header <sys/kdaemon.h> has been removed. These functions and header
100 were specific to systems using the Linux kernel and could not usefully be
101 used with the GNU C Library on systems with version 2.6 or later of the
104 * Optimized string, wcsmbs and memory functions for IBM z13.
105 Implemented by Stefan Liebler.
107 * Newly linked programs that define a variable called signgam will no longer
108 have it set by the lgamma, lgammaf and lgammal functions. Programs that
109 require signgam to be set by those functions must ensure that they use the
110 variable provided by the GNU C Library and declared in <math.h>, without
111 defining their own copy.
113 * The minimum GCC version that can be used to build this version of the GNU
114 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
115 still be used to compile programs using the GNU C Library.
117 Security related changes:
119 * An out-of-bounds value in a broken-out struct tm argument to strftime no
120 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
122 * The LD_POINTER_GUARD environment variable can no longer be used to disable
123 the pointer guard feature. It is always enabled. Previously,
124 LD_POINTER_GUARD could be used to disable security hardening in binaries
125 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
128 * An integer overflow in hcreate and hcreate_r could lead to an
129 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
131 * The catopen function no longer has unbounded stack usage. Reported by
134 * The nan, nanf and nanl functions no longer have unbounded stack usage
135 depending on the length of the string passed as an argument to the
136 functions. Reported by Joseph Myers. (CVE-2014-9761)
138 * A stack-based buffer overflow was found in libresolv when invoked from
139 libnss_dns, allowing specially crafted DNS responses to seize control
140 of execution flow in the DNS client. The buffer overflow occurs in
141 the functions send_dg (send datagram) and send_vc (send TCP) for the
142 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
143 family. The use of AF_UNSPEC triggers the low-level resolver code to
144 send out two parallel queries for A and AAAA. A mismanagement of the
145 buffers used for those queries could result in the response of a query
146 writing beyond the alloca allocated buffer created by
147 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
148 the overflow. Thanks to the Google Security Team and Red Hat for
149 reporting the security impact of this issue, and Robert Holiday of
150 Ciena for reporting the related bug 18665. (CVE-2015-7547)
152 The following bugs are resolved with this release:
154 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
155 [887] math: Math library function "logb" and "nextafter" inconsistent
156 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
157 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
158 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
159 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
161 [4404] localedata: German translation of "Alarm clock" is misleading
162 [6799] math: nextafter() and nexttoward() doen't set errno on
163 overflow/underflow errors
164 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
166 [10432] nis: _nss_nis_setnetgrent assertion failure
167 [11460] libc: fts has no LFS support
168 [12926] network: getaddrinfo()/make_request() may spin forever
169 [13065] nptl: Race condition in pthread barriers
170 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
171 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
173 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
174 [14912] libc: Rename non-installed bits/*.h headers
175 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
176 [15367] math: Let gcc use __builtin_isinf
177 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
178 [15421] math: lgamma wrongly sets signgam for ISO C
179 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
180 FE_INVALID with argument out of range
181 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
183 [15786] dynamic-link: ifunc resolver functions can smash function
185 [15918] math: Unnecessary check for equality in hypotf()
186 [16061] localedata: Review / update transliteration data
187 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
189 [16141] time: strptime %z offset restriction
190 [16171] math: drem should be alias of remainder
191 [16296] math: fegetround is pure?
192 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
193 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
195 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
196 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
198 [16422] math: [powerpc] math-float, math-double failing llrint tests with
199 "Exception "Inexact" set" on ppc32
200 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
201 [16517] math: Missing underflow exception from tanf/tan/tanl
202 [16519] math: Missing underflow exception from sinhf
203 [16520] math: Missing underflow exception from tanhf
204 [16521] math: Missing underflow exception from exp2
205 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
207 [16734] stdio: fopen calls mmap to allocate its buffer
208 [16961] math: nan function incorrect handling of bad sequences
209 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
210 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
211 [16985] locale: localedef: confusing error message when opening output
213 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
214 [17197] locale: Redundant shift character in iconv conversion output at
216 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
217 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
218 [17250] dynamic-link: static linking breaks nss loading
219 (getaddrinfo/getpwnam/etc...)
220 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
222 [17441] math: isnan() should use __builtin_isnan() in GCC
223 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
224 (related to lock elision)
225 [17787] manual: Exponent on page 324 of the PDF ends prematurely
226 [17886] time: strptime should be able to parse "Z" as a timezone with %z
227 [17887] time: strptime should be able to parse "+01:00" style timezones
228 [17905] libc: catopen() Multiple unbounded stack allocations
230 [18084] libc: backtrace (..., 0) dumps core on x86
231 [18086] libc: nice() sets errno to 0 on success
232 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
233 is too large (CVE-2015-8778)
234 [18251] dynamic-link: SONAME missing when audit modules provides path
235 [18265] libc: add attributes for wchar string and memory functions
236 [18370] math: csqrt missing underflows
237 [18421] libc: [hppa] read-only segment has dynamic relocations
238 [18472] libc: Obsolete syscall wrappers should be compat symbols
239 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
240 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
241 [18525] localedata: Remove locale timezone information
242 [18560] libc: [powerpc] spurious bits/ipc.h definitions
243 [18568] localedata: Update locale data to Unicode 8.0
244 [18589] locale: sort-test.sh fails at random
245 [18595] math: ctan, ctanh missing underflows
246 [18604] libc: assert macro-expands its argument
247 [18610] math: S390: fetestexcept() reports any exception if DXC-code
248 contains a vector instruction exception.
249 [18611] math: j1, jn missing errno setting on underflow
250 [18618] localedata: sync Chechen locale definitions with other *_RU
252 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
253 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
254 [18665] network: In send_dg, the recvfrom function is NOT always using the
255 buffer size of a newly created buffer (CVE-2015-7547)
256 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
258 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
260 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
261 [18699] math: tilegx cproj() for various complex infinities does not yield
263 [18724] libc: Harden put*ent functions against data injection
264 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
265 [18755] build: build errors with -DNDEBUG
266 [18757] stdio: fmemopen fails to set errno on failure
267 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
269 [18781] libc: openat64 lacks O_LARGEFILE
270 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
271 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
272 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
273 [18790] math: [ldbl-128ibm] tanhl inaccurate
274 [18795] libc: stpncpy fortification misses buffer lengths that are
276 [18796] build: build fails for --disable-mathvec
277 [18803] math: hypot missing underflows
278 [18820] stdio: fmemopen may leak memory on failure
279 [18823] math: csqrt spurious underflows
280 [18824] math: fma spurious underflows
281 [18825] math: pow missing underflows
282 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
283 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
284 [18870] build: sem_open.c fails to compile with missing symbol
286 [18872] stdio: Fix memory leak in printf_positional
287 [18873] libc: posix_fallocate overflow check ineffective
288 [18875] math: Excess precision leads incorrect libm
289 [18877] libc: arm: mmap offset regression
290 [18887] libc: memory corruption when using getmntent on blank lines
291 [18918] localedata: hu_HU: change time to HH:MM:SS format
292 [18921] libc: Regression: extraneous stat() and fstat() performed by
294 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
295 binaries (CVE-2015-8777)
296 [18951] math: tgamma missing underflows
297 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
299 [18953] localedata: lt_LT: change currency symbol to the euro
300 [18956] math: powf inaccuracy
301 [18961] math: [i386] exp missing underflows
302 [18966] math: [i386] exp10 missing underflows
303 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
304 [18969] build: multiple string test failures due to missing locale
306 [18970] libc: Reference of pthread_setcancelstate in libc.a
307 [18977] math: float / long double Bessel functions not in XSI POSIX
308 [18980] math: i386 libm functions return with excess range and precision
309 [18981] math: i386 scalb*, ldexp return with excess range and precision
310 [18982] stdio: va_list and vprintf
311 [18985] time: Passing out of range data to strftime() causes a segfault
313 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
314 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
315 [19012] locale: iconv_open leaks memory on error path
316 [19016] math: clog, clog10 inaccuracy
317 [19018] nptl: Mangle function pointers in tls_dtor_list
318 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
319 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
320 [19048] malloc: malloc: arena free list can become cyclic, increasing
322 [19049] math: [powerpc] erfc incorrect zero sign
323 [19050] math: [powerpc] log* incorrect zero sign
324 [19058] math: [x86_64] Link fail with -fopenmp and -flto
325 [19059] math: nexttoward overflow incorrect in non-default rounding modes
326 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
327 [19074] network: Data race in _res_hconf_reorder_addrs
328 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
329 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
330 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
332 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
334 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
335 [19086] manual: posix_fallocate64 documented argument order is wrong.
336 [19088] math: lround, llround missing exceptions close to overflow
338 [19094] math: lrint, llrint missing exceptions close to overflow threshold
339 [19095] math: dbl-64 lrint incorrect for 64-bit long
340 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
341 [19124] dynamic-link: ld.so failed to build with older assmebler
342 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
343 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
344 [19134] math: [powerpc32] lround, lroundf spurious exceptions
345 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
346 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
347 pthread_setaffinity_np
348 [19156] math: [ldbl-128] j0l spurious underflows
349 [19164] nptl: tst-getcpu fails with many possible CPUs
350 [19168] math: math/test-ildoubl and math/test-ldouble failure
351 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
352 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
354 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
355 (FE_NOMASK_ENV) do not clear SSE exceptions
356 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
357 _int_new_arena/reused_arena
358 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
359 [19201] math: dbl-64 remainder incorrect sign of zero result
360 [19205] math: bits/math-finite.h conditions do not match math.h and
362 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
363 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
364 for C99-based standards
365 [19212] libc: features.h not -Wundef clean
366 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
368 [19214] libc: Family and model identification for AMD CPU's are incorrect.
369 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
370 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
372 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
374 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
376 [19242] libc: strtol incorrect in Turkish locales
377 [19243] malloc: reused_arena can pick an arena on the free list, leading
378 to an assertion failure and reference count corruption
379 [19253] time: tzset() ineffective when temporary TZ did not include DST
381 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
382 [19270] math: [hppa] Shared libm missing __isnanl
383 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
384 MAP_HUGETLB and MAP_STACK defines
385 [19313] nptl: Wrong __cpu_mask for x32
386 [19347] libc: grantpt: try to force a specific gid even without pt_chown
387 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
388 [19350] math: [ldbl-128ibm] sinhl spurious overflows
389 [19351] math: [ldbl-128ibm] logl inaccurate near 1
390 [19363] time: x32: times() return value wrongly truncates/sign extends
392 [19367] dynamic-link: Improve branch prediction on Silvermont
393 [19369] network: Default domain name not reset by res_ninit when "search"
394 / "domain" entry is removed from resolv.conf
395 [19375] math: powerpc: incorrect results for POWER7 logb with negative
397 [19385] localedata: bg_BG: time separator should be colon, not comma
398 [19408] libc: linux personality syscall wrapper may erroneously return an
399 error on 32-bit architectures
400 [19415] libc: dladdr returns wrong names on hppa
401 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
402 IBM905, IBM907, and IBM909
403 [19439] math: Unix98 isinf and isnan functions conflict with C++11
404 [19443] build: build failures with -DDEBUG
405 [19451] build: Make check fails on test-double-vlen2
406 [19462] libc: Glibc failed to build with -Os
407 [19465] math: Wrong code with -Os
408 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
410 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
412 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
413 [19486] math: S390: Math tests fail with "Exception Inexact set".
414 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
415 [19550] libc: [mips] mmap negative offset handling inconsistent with other
417 [19590] math: Fail to build shared objects that use libmvec.so functions.
421 * The following bugs are resolved with this release:
423 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
424 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
425 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
426 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
427 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
428 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
429 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
430 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
431 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
432 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
433 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
434 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
435 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
436 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
437 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
438 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
439 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
440 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
441 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
442 18657, 18676, 18694, 18696, 18887.
444 * Cache information can be queried via sysconf() function on s390 e.g. with
445 _SC_LEVEL1_ICACHE_SIZE as argument.
447 * A buffer overflow in gethostbyname_r and related functions performing DNS
448 requests has been fixed. If the NSS functions were called with a
449 misaligned buffer, the buffer length change due to pointer alignment was
450 not taken into account. This could result in application crashes or,
451 potentially arbitrary code execution, using crafted, but syntactically
452 valid DNS responses. (CVE-2015-1781)
454 * The time zone file parser has been made more robust against crafted time
455 zone files, avoiding heap buffer overflows related to the processing of
456 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
457 large time zone data files. Overly long time zone specifiers in the TZ
458 variable no longer result in stack overflows and crashes.
460 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
461 for LD and GD on x86 and x86-64, has been implemented. You will need
462 binutils-2.24 or later to enable this optimization.
464 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
465 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
466 Hat). These updates cause user visible changes, such as the fix for bug
469 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
470 and getXXbyYY NSS calls for the same database, causing a denial-of-service
471 condition in some applications.
473 * Added vector math library named libmvec with the following vectorized x86_64
474 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
476 The library can be disabled with --disable-mathvec. Use of the functions is
477 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
478 Shared library libmvec.so is linked in as needed when using -lm (no need to
479 specify -lmvec explicitly for not static builds).
480 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
482 * A new fmemopen implementation has been added with the goal of POSIX
483 compliance. The new implementation fixes the following long-standing
484 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
485 old implementation is still present for use be by existing binaries.
487 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
488 releases. It has been fixed to match 2.19 and older, but binaries built
489 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
491 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
492 Contributed by Roland McGrath (Google).
494 * The header <regexp.h> is deprecated, and will be removed in a future
495 release. Use of this header will trigger a deprecation warning.
496 Application developers should update their code to use <regex.h> instead.
498 This header was formerly part of SUS, but was deprecated in 1994 and
499 removed from the standard in 2001. Also, the glibc implementation
500 leaks memory. See BZ#18681 for more details.
504 * The following bugs are resolved with this release:
506 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
507 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
508 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
509 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
510 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
511 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
512 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
513 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
514 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
515 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
518 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
519 too little memory for the to-be-scanned arguments and overflow the
520 allocated buffer. The implementation now correctly computes the required
521 buffer size when using malloc, and switches to malloc from alloca as
524 * A new semaphore algorithm has been implemented in generic C code for all
525 machines. Previous custom assembly implementations of semaphore were
526 difficult to reason about or ensure that they were safe. The new version
527 of semaphore supports machines with 64-bit or 32-bit atomic operations.
528 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
529 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
531 * Port to Altera Nios II has been contributed by Mentor Graphics.
533 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
534 implementations for powerpc64/powerpc64le.
535 Implemented by Adhemerval Zanella (IBM).
537 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
538 and powerpc64le. This may improve lock scaling of existing programs on
539 HTM capable systems. The lock elision code is only enabled with
540 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
541 powerpc will issue a transaction abort on every syscall to avoid side
542 effects being visible outside transactions.
544 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
545 AArch64. Contributed by ARM Ltd.
547 * i386 memcpy functions optimized with SSE2 unaligned load/store.
549 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
550 under certain input conditions resulting in the execution of a shell for
551 command substitution when the application did not request it. The
552 implementation now checks WRDE_NOCMD immediately before executing the
553 shell and returns the error WRDE_CMDSUB as expected.
555 * CVE-2012-3406 printf-style functions could run into a stack overflow when
556 processing format strings with a large number of format specifiers.
558 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
559 infinite loop if the DNS response contained a PTR record of an unexpected
562 * The minimum GCC version that can be used to build this version of the GNU
563 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
564 still be used to compile programs using the GNU C Library.
566 * The GNU C Library is now built with -Werror by default. This can be
567 disabled by configuring with --disable-werror.
569 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
571 * The obsolete sigvec function has been removed. This was the original
572 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
573 programs have been using instead for about 25 years. Of course, ABI
574 compatibility for old binaries using sigvec remains intact.
576 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
577 with newer versions of bison.
579 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
580 The original MIPS o32 hard-float ABI requires an FPU where double-precision
581 registers overlay two consecutive single-precision registers. MIPS32R2
582 introduced a new FPU mode (FR=1) where double-precision registers extend the
583 corresponding single-precision registers which is incompatible with the
584 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
585 require the use of FR=1 making a transition necessary. New o32 ABI
586 extensions enable users to migrate over time from the original o32 ABI
587 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
588 tracks the ABI of any loaded object and verifies that new objects are
589 compatible. Mode transitions will also be requested as required and
590 unsupportable objects will be rejected. The ABI checks include both soft and
591 hard float ABIs for o32, n32 and n64.
593 GCC 5 with GNU binutils 2.25 onwards:
594 It is strongly recommended that all o32 system libraries are built using the
595 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
596 with the original and all new o32 ABI extensions. Configure a MIPS GCC
597 compiler using --with-fp-32=xx to set this by default.
601 * The following bugs are resolved with this release:
603 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
604 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
605 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
606 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
607 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
608 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
609 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
610 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
611 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
612 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
613 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
614 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
615 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
616 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
617 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
619 * Reverted change of ABI data structures for s390 and s390x:
620 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
621 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
622 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
623 are preserved pointing straight to the same implementation as the old ones.
624 Given that, new callers will simply provide a too-big buffer to these
625 functions. Any applications/libraries out there that embed jmp_buf or
626 ucontext_t in an ABI-relevant data structure that have already been rebuilt
627 against 2.19 headers will have to rebuilt again. This is necessary in any
628 case to revert the breakage in their ABI caused by the glibc change.
630 * Support for file description locks is added to systems running the
631 Linux kernel. The standard file locking interfaces are extended to
632 operate on file descriptions, not file descriptors, via the use of
633 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
634 are associated with an open file instead of a process.
636 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
638 * The minimum Linux kernel version that this version of the GNU C Library
639 can be used with is 2.6.32.
641 * Running the testsuite no longer terminates as soon as a test fails.
642 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
643 with PASS or FAIL lines for individual tests. A summary of the results is
644 printed, including a list of failing lists, and "make check" exits with
645 error status if there were any unexpected failures. "make check
646 stop-on-test-failure=y" may be used to keep the old behavior.
648 * The am33 port, which had not worked for several years, has been removed
651 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
652 supported; they now act the same as _DEFAULT_SOURCE (but generate a
653 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
654 conflicted with POSIX (support for which was removed in 2.19), the
655 interfaces those macros enabled remain available when compiling with
656 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
659 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
661 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
662 This may improve lock scaling of existing programs on TX capable systems.
663 The lock elision code is only built with --enable-lock-elision=yes and
664 then requires a GCC version supporting the TX builtins. With lock elision
665 default mutexes are elided via __builtin_tbegin, if the cpu supports
666 transactions. By default lock elision is not enabled and the elision code
669 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
670 copy the path argument. This allowed programs to cause posix_spawn to
671 deference a dangling pointer, or use an unexpected pathname argument if
672 the string was modified after the posix_spawn_file_actions_addopen
675 * All supported architectures now use the main glibc sysdeps directory
676 instead of some being in a separate "ports" directory (which was
677 distributed separately before glibc 2.17).
679 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
680 On configurations that support it (all Linux configurations), it's now
681 used regardless of the --enable-add-ons switch to configure. It is no
682 longer possible to build such configurations without pthreads support.
684 * Locale names, including those obtained from environment variables (LANG
685 and the LC_* variables), are more tightly checked for proper syntax.
686 setlocale will now fail (with EINVAL) for locale names that are overly
687 long, contain slashes without starting with a slash, or contain ".." path
688 components. (CVE-2014-0475) Previously, some valid locale names were
689 silently replaced with the "C" locale when running in AT_SECURE mode
690 (e.g., in a SUID program). This is no longer necessary because of the
693 * On x86-64, the dynamic linker's lazy-binding support is now compatible
694 with application code using Intel MPX instructions. (With all previous
695 versions, the MPX register state could be clobbered when making calls
696 into or out of a shared library.) Note that while the new dynamic
697 linker is compatible with all known x86 hardware whether or not it
698 supports Intel MPX, some x86 instruction-set emulators might fail to
699 handle the new instruction encodings. This is known to affect Valgrind
700 versions up through 3.9 (but will be fixed in the forthcoming 3.10
701 release), and might affect other tools that do instruction emulation.
703 * Support for loadable gconv transliteration modules has been removed.
704 The support for transliteration modules has been non-functional for
705 over a decade, and the removal is prompted by security defects. The
706 normal gconv conversion modules are still supported. Transliteration
707 with //TRANSLIT is still possible, and the //IGNORE specifier
708 continues to be supported. (CVE-2014-5119)
710 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
711 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
712 resulting a denial-of-service security vulnerability in applications which
713 use functions related to iconv. (CVE-2014-6040)
717 * The following bugs are resolved with this release:
719 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
720 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
721 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
722 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
723 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
724 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
725 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
726 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
727 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
728 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
729 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
730 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
731 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
732 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
733 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
734 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
735 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
736 16431, 16453, 16474, 16506, 16510, 16529
738 * Slovenian translations for glibc messages have been contributed by the
739 Translation Project's Slovenian team of translators.
741 * The public headers no longer use __unused nor __block. This change is to
742 support compiling programs that are derived from BSD sources and use
743 __unused internally, and to support compiling with Clang's -fblock
744 extension which uses __block.
746 * CVE-2012-4412 The strcoll implementation caches indices and rules for
747 large collation sequences to optimize multiple passes. This cache
748 computation may overflow for large collation sequences and may cause a
749 stack or buffer overflow. This is now fixed to use a slower algorithm
750 which does not use a cache if there is an integer overflow.
752 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
753 rules for large collation sequences to optimize multiple passes and falls
754 back to alloca if malloc fails, resulting in a possible stack overflow.
755 The implementation now falls back to an uncached collation sequence lookup
758 * CVE-2013-4788 The pointer guard used for pointer mangling was not
759 initialized for static applications resulting in the security feature
760 being disabled. The pointer guard is now correctly initialized to a
761 random value for static applications. Existing static applications need
762 to be recompiled to take advantage of the fix (bug 15754).
764 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
765 to the d_name member of struct dirent, or omit the terminating NUL
766 character. (Bugzilla #14699).
768 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
769 aligned_alloc functions could allocate too few bytes or corrupt the
770 heap when passed very large allocation size values (Bugzilla #15855,
773 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
774 for AF_INET6 has been fixed (Bugzilla #16072).
776 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
777 pap_CW, quz_PE, the_NP.
779 * Substantially revised locales: gd_GB, ht_HT
781 * The LC_ADDRESS field was updated to support country_car for almost all
784 * ISO 1427 definitions were updated.
786 * ISO 3166 definitions were updated.
788 * The localedef utility now supports --big-endian and --little-endian
789 command-line options to generate locales for a different system from that
790 for which the C library was built.
792 * Binary locale files now only depend on the endianness of the system for
793 which they are generated and not on other properties of that system. As a
794 consequence, binary files generated with new localedef may be incompatible
795 with old versions of the GNU C Library, and binary files generated with
796 old localedef may be incompatible with this version of the GNU C Library,
797 in the following circumstances:
799 + Locale files may be incompatible on m68k systems.
801 + Locale archive files (but not separate files for individual locales) may
802 be incompatible on systems where plain "char" is signed.
804 * The configure option --disable-versioning has been removed. Builds with
805 --disable-versioning had not worked for several years.
807 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
808 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
810 * SystemTap probes for malloc have been introduced.
812 * SystemTap probes for slow multiple precision fallback paths of
813 transcendental functions have been introduced.
815 * Support for powerpc64le has been added.
817 * The soft-float powerpc port now supports e500 processors.
819 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
821 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
822 set of header declarations that are enabled by default, even when other
823 feature test macros or compiler options such as -std=c99 would otherwise
824 disable some of those declarations.
826 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
827 conflict with POSIX. The libbsd-compat library (which was a dummy library
828 that did nothing) has also been removed.
830 * Preliminary documentation about Multi-Thread, Async-Signal and
831 Async-Cancel Safety has been added.
833 * Change of ABI data structures for s390 and s390x:
834 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
835 allow for future hardware extensions. All library functions that accept or
836 return these structures were versioned in order to provide backwards
837 compatibility with existing code. However, not all cases can be handled
838 with interface versioning. If an application embeds either structure into
839 another structure and that structure is passed to another compilation unit
840 which expects the newer larger-sized object then any access to the new
841 fields will result in undefined behaviour. Similarly any access to fields
842 that were moved by the enlarging of the structures will cause undefined
843 behaviour. To fix the undefined behaviour all objects that are part of the
844 final in-memory image must agree on the size of structures, and this may
845 require recompilation.
849 * The following bugs are resolved with this release:
851 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
852 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
853 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
854 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
855 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
856 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
857 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
858 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
859 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
860 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
861 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
862 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
863 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
866 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
867 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
868 Distributions can re-enable building and using pt_chown via the new configure
869 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
870 considerable security risks and should only be used if the distribution
871 understands and accepts the risks.
873 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
876 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
877 fixed (Bugzilla #15330).
879 * Add support for calling C++11 thread_local object destructors on thread
880 and program exit. This needs compiler support for offloading C++11
881 destructor calls to glibc.
883 * Improved worst case performance of libm functions with double inputs and
886 * Support for priority inherited mutexes in pthread condition variables on
887 non-x86 architectures.
889 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
891 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
893 * Optimized string functions for ARM. Implemented by Will Newton and
896 * Optimized libm functions for SPARC. Implemented by David S. Miller.
898 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
901 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
902 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
904 * Added a benchmark framework to track performance of functions in glibc.
906 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
907 It is based on draft TS 18661 and currently enabled as a GNU extension.
909 * On Linux, the clock function now uses the clock_gettime system call
910 for improved precision, rather than old times system call.
912 * Added support for version-3 tz format files. This is needed when using
913 the tz database release 2013e or later, and affects a few unusual cases --
914 currently only TZ='America/Godthab' for time stamps after 2037.
916 * Added new API functions pthread_getattr_default_np and
917 pthread_setattr_default_np to get and set the default pthread
918 attributes of a process.
920 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
921 This may improve lock scaling of existing programs on TSX capable systems.
922 When the --enable-lock-elision=yes parameter is specified at configure
923 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
926 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
927 availability). Implemented by Ryan S. Arnold.
929 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
933 * The following bugs are resolved with this release:
935 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
936 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
937 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
938 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
939 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
940 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
941 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
942 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
943 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
944 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
945 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
946 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
947 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
948 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
949 14879, 14889, 14893, 14898, 14914.
951 * Optimization of memcpy for MIPS.
953 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
954 EMFILE has been fixed (Bugzilla #14889).
956 * The add-on ports collection is now distributed in the "ports" subdirectory
957 of the main GNU C Library distribution, rather than separately.
959 * Port to ARM AArch64 contributed by Linaro.
961 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
962 Optimized versions of memcpy, memset, and memcmp added for System z10 and
964 Implemented by Andreas Krebbel.
966 * The new function secure_getenv allows secure access to the environment,
967 returning NULL if running in a SUID/SGID process. This function replaces
968 the internal function __secure_getenv.
970 * SystemTap static probes have been added into the dynamic linker.
971 Implemented by Gary Benson.
973 * Optimizations of string functions strstr, strcasestr and memmem.
974 Implemented by Maxim Kuvyrkov.
976 * The minimum Linux kernel version that this version of the GNU C Library
977 can be used with is 2.6.16.
979 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
980 powerpc POWER7. Implemented by Will Schmidt.
982 * New configure option --disable-nscd builds the C library such that it
983 never attempts to contact the Name Service Caching Daemon (nscd).
984 New configure option --disable-build-nscd avoids building nscd itself;
985 this is the default if --disable-nscd is used.
987 * Improved support for cross-compilation, including cross-testing and
988 bootstrap builds without a previously built glibc.
990 * Several testsuite tests are now able to test multiple IFUNC variants of an
991 interface, rather than just testing the one that would be chooen by
994 * New configure options --with-bugurl and --with-pkgversion, for
995 distributors to use to embed their bug-reporting and package version
996 information in --help and --version output.
998 * The ttyname and ttyname_r functions on Linux now fall back to searching for
999 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
1000 allows creation of chroots without the procfs mounted on /proc.
1002 * The `crypt' function now fails if passed salt bytes that violate the
1003 specification for those values. On Linux, the `crypt' function will
1004 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
1005 enabled, and fail on encrypted strings using the MD5 or DES algorithm
1006 when the mode is enabled.
1008 * The `clock_*' suite of functions (declared in <time.h>) is now available
1009 directly in the main C library. Previously it was necessary to link with
1010 -lrt to use these functions. This change has the effect that a
1011 single-threaded program that uses a function such as `clock_gettime' (and
1012 is not linked with -lrt) will no longer implicitly load the pthreads
1013 library at runtime and so will not suffer the overheads associated with
1014 multi-thread support in other code such as the C++ runtime library.
1016 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
1021 * The following bugs are resolved with this release:
1023 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
1024 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
1025 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
1026 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
1027 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
1028 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
1029 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
1030 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
1031 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
1032 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
1033 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
1034 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
1035 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
1036 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
1037 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
1038 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
1039 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
1040 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
1041 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
1042 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
1043 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1044 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1047 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1048 configuring glibc with:
1049 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1050 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1051 Implemented by H.J. Lu.
1055 + define static_assert
1057 + do not declare gets
1059 + declare at_quick_exit and quick_exit also for ISO C11
1061 + aligned_alloc. NB: The code is deliberately allows the size parameter
1062 to not be a multiple of the alignment. This is a moronic requirement
1063 in the standard but it is only a requirement on the caller, not the
1066 + timespec_get added
1068 + uchar.h support added
1070 + CMPLX, CMPLXF, CMPLXL added
1072 Implemented by Ulrich Drepper.
1074 * Support for the IA-64 has been moved to ports.
1076 * Remove support for anything but ELF binary format
1078 * Checking versions of poll, ppoll added.
1079 Implemented by Ulrich Drepper.
1081 * More generic and 64-bit performance optimizations to math functions.
1082 Implemented by Ulrich Drepper.
1084 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1085 headers and functions available at compile time as they were before
1086 version 2.14. This option will be removed at some time in the future
1087 after the TI-RPC library becomes fully sufficient for the needs of
1088 existing applications.
1090 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1091 Note that glibc is not expected to work with any Linux kernel version
1094 * New header <sys/auxv.h> and function getauxval allowing easy access to
1095 the AT_* key-value pairs passed from the Linux kernel. The header also
1096 defines the HWCAP_* bits associated with the AT_HWCAP key.
1098 * New locales: mag_IN
1100 * New configure option --enable-systemtap builds SystemTap static probes
1101 into libc for setjmp and longjmp and into libpthread for various operations.
1102 So far the setjmp/longjmp probes and some of the libpthread probes are
1103 provided only for i*86 and x86_64.
1104 Implemented by Roland McGrath and Rayson Ho.
1106 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1108 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1111 * More optimized functions for SPARC. Implemented by David S. Miller.
1113 * Improved support for cross-compilation, especially bootstrap builds
1114 without a previously built glibc.
1116 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1117 Chris Metcalf from Tilera.
1119 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1120 now supported for ARM processors.
1122 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1123 as the name of the dynamic linker, to distinguish it from the
1124 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1126 * Support for CRIS has been removed from ports.
1128 * A new class of installed header has been documented for low-level
1129 platform-specific functionality. PowerPC added the first instance with a
1130 function to provide time base register access. Contributed by Tulio
1131 Magno Quites Machado Filho.
1133 * ix86 configurations now install header files that are consistent with
1134 what x86-64 configurations install. These same header files can be used
1135 for -m32, -m64, or -mx32 builds.
1136 Contributed by H.J. Lu.
1138 * Math library bug fixes. A thorough audit of all open math library bugs was
1139 conducted by Joseph Myers. Significant progress was made on many math
1140 library bugs resulting in more accurate exceptions and function results.
1141 Many thanks to all those that contributed including Andreas Jaeger for his
1142 patch review and work on the x87 trigonometric instruction issues.
1144 * Timezone data is no longer installed. Timezone-related binaries and scripts
1145 will continue to be installed. Users should obtain their timezone data from
1146 their distribution provider or from the tzdata package at
1147 <ftp://munnari.oz.au/pub/>.
1151 * The following bugs are resolved with this release:
1153 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1154 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1155 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1156 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1157 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1158 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1159 13484, 13506, 13515, 13523, 13524, 13538, 13540
1161 * New program pldd to list loaded object of a process
1162 Implemented by Ulrich Drepper.
1164 * Add nss_db support back to glibc. No more dependency on Berkeley db
1165 and support for initgroups lookups.
1166 Implemented by Ulrich Drepper.
1168 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
1169 Contributed by HJ Lu.
1171 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
1172 Contributed by HJ Lu.
1174 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
1175 on x86-32 and x86-64.
1176 Contributed by Liubov Dmitrieva.
1178 * Optimized strchr and strrchr for SSE on x86-32.
1179 Contributed by Liubov Dmitrieva.
1181 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
1182 for x86-64 and x86-32.
1183 Contributed by Liubov Dmitrieva.
1185 * New interfaces: scandirat, scandirat64
1186 Implemented by Ulrich Drepper.
1188 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
1189 Implemented by Ulrich Drepper.
1191 * nscd now also caches the netgroup database.
1192 Implemented by Ulrich Drepper.
1194 * Integrate libm with gcc's -ffinite-math-only option.
1195 Implemented by Ulrich Drepper.
1197 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
1198 to math functions. Implemented by Ulrich Drepper.
1200 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
1201 Implemented by Ulrich Drepper.
1203 * New Linux interfaces: process_vm_readv, process_vm_writev
1205 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
1206 Implemented by Ulrich Drepper.
1208 * Optimized nearbyint and strcasecmp for PPC.
1209 Implemented by Adhemerval Zanella.
1211 * New locales: bho_IN, unm_US, es_CU, ta_LK
1215 * The following bugs are resolved with this release:
1217 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
1218 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
1219 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
1220 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
1221 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
1222 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
1223 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
1224 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
1225 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
1226 12795, 12811, 12813, 12814, 12841
1228 * The RPC implementation in libc is obsoleted. Old programs keep working
1229 but new programs cannot be linked with the routines in libc anymore.
1230 Programs in need of RPC functionality must be linked against TI-RPC.
1231 The TI-RPC implementation is IPv6 enabled and there are other benefits.
1233 Visible changes of this change include (obviously) the inability to link
1234 programs using RPC functions without referencing the TI-RPC library and the
1235 removal of the RPC headers from the glibc headers.
1236 Implemented by Ulrich Drepper.
1238 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
1239 syncfs, setns, sendmmsg
1241 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
1242 yue_HK, lij_IT, mhr_RU
1244 * New encodings: CP770, CP771, CP772, CP773, CP774
1246 * New program sotruss to trace calls through PLTs
1247 Implemented by Ulrich Drepper.
1249 * The malloc hook implementation is marked deprecated and will be removed
1250 from the default implementation in the next version. The design never
1251 worked ever since the introduction of threads. Even programs which do
1252 not create threads themselves can use multiple threads created internally.
1256 * The following bugs are resolved with this release:
1258 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
1259 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
1260 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
1261 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
1264 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
1266 * POWER7 optimizations: memset, memcmp, strncmp
1268 * New optimized string functions for x86-64: strnlen (SSE2),
1269 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
1270 Implemented by Ulrich Drepper.
1274 * The following bugs are resolved with this release:
1276 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
1277 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
1278 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
1279 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
1280 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
1281 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
1282 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
1283 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
1285 * New interfaces: pthread_getname_np, pthread_setname_np
1287 * New Linux interface: recvmmsg
1289 * STT_GNU_IFUNC implemented for Sparc by David Miller.
1291 * The dynamic linker now recognizes supported ABI versions from the
1292 EI_ABIVERSION field in the ELF header.
1293 Implemented by Ulrich Drepper.
1295 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
1296 will not be used to fill in password fields in the passwd.byname replies.
1297 Instead it is used to synthesize the shadow.byname table, should it be
1298 missing. This is a useful mode in some installations involving Solaris.
1299 Implemented by Ulrich Drepper.
1301 * New locales: kok_IN, sq_MK, cv_RU
1305 * The following bugs are resolved with this release:
1307 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
1308 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
1309 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
1310 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
1311 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
1312 10789, 10817, 10823, 10840, 10847
1314 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
1316 Implemented by Ulrich Drepper.
1318 * Checking version of longjmp added that fails if an uninitialized stack
1319 frame would be created. Implemented by Ulrich Drepper.
1321 * STT_GNU_IFUNC is now supported in static executables.
1322 Implemented by H.J. Lu.
1324 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
1326 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
1327 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
1328 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
1329 Contributed by H.J. Lu.
1331 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
1332 Implemented by Ulrich Drepper.
1334 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
1336 Contributed by H.J. Lu.
1338 * Support for fma instruction in AVX on x86-64.
1339 Implemented by H.J. Lu and Ulrich Drepper.
1341 * AVX support in x86-64 auditing support in ld.so.
1342 Implemented by H.J. Lu.
1344 * STB_GNU_UNIQUE support added.
1345 Implemented by Ulrich Drepper.
1347 * Implement second fallback mode for optimized DNS lookup for even more
1348 broken environments. If two requests from the same port are not
1349 handled correctly close the socket and open a new one before sending
1350 the second request. The 'single-request-reopen' option in /etc/resolv.conf
1351 can be used to select this mode right away, instead of rediscovering the
1352 necessity is every process again.
1353 Implemented by Ulrich Drepper.
1355 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
1356 Implemented by Adam Tkac.
1358 * Optimized iconv conversions for S390x.
1359 Implemented by Andreas Krebbel.
1361 * Using condvars with PI mutexes is now more efficient due to kernel
1362 support for requeueing to PI futexes. NPTL support added for x86-64.
1363 Implemented by Ulrich Drepper.
1365 * New locales: ps_AF, my_MM
1369 * The following bugs are resolved with this release:
1371 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1372 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1373 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1374 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1375 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1377 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1378 Implemented by Ulrich Drepper.
1380 * New Linux interfaces: accept4, fallocate, fallocate64.
1381 Implemented by Ulrich Drepper.
1383 * Correct declarations of string function when used in C++ code. This
1384 could lead to compile errors for invalid C++ code.
1386 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1389 * New POSIX 2008 interface: psiginfo
1390 Implemented by Ulrich Drepper.
1392 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1393 Implemented by Ulrich Drepper.
1395 * Support for selecting between multiple function definitions at runtime
1396 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1398 * The libcrypt library can now use the hash function implementations in
1399 NSS. Implemented by Ulrich Drepper.
1401 * The malloc implementation can be compiled to be less memory efficient
1402 but higher performing in multi-threaded programs.
1403 Implemented by Ulrich Drepper.
1405 * New locales: nan_TW@latin, ks_IN
1407 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1408 Implemented by Ulrich Drepper.
1410 * Extended printf hook support. It is possible to use user-defined types
1411 and extend existing format specifiers.
1412 Implemented by Ulrich Drepper.
1414 * Handling for group shadow files has been added.
1415 Implemented by Ulrich Drepper.
1417 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1418 servers (the case, e.g., for some people using the built-in DNS
1419 server in ADSL modems/routers). There is a once-per-process timeout
1420 in case of a broken server. To avoid it, users can run nscd or put
1421 'options single-request' in /etc/resolv.conf.
1422 Implemented by Ulrich Drepper.
1426 * The following bugs are resolved with this release:
1428 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1429 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1430 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1431 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1432 6968, 6974, 6980, 6995, 7008, 7009, 7029
1434 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1435 up at the same time. Implemented by Ulrich Drepper.
1437 * TLS descriptors for LD and GD on x86 and x86-64.
1438 Implemented by Alexandre Oliva.
1440 * getaddrinfo now handles DCCP and UDPlite.
1441 Implemented by Ulrich Drepper.
1443 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1444 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1445 Implemented by Ulrich Drepper.
1447 * New implementation of memmem, strstr, and strcasestr which is O(n).
1448 Implemented by Eric Blake.
1450 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1452 * Implement "e" option for popen to open file descriptor with the
1453 close-on-exec flag set. Implemented by Ulrich Drepper.
1455 * Implement "b" mode for fmemopen. In this mode writes writes don't
1456 implicitly add a NUL byte and seeks from the end of the buffer really
1457 use the buffer end, not the string length as the basis.
1458 Implemented by Ulrich Drepper.
1460 * Many functions, exported and internal, now atomically set the close-on-exec
1461 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1463 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1465 Implemented by Pravin Satpute.
1467 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1471 * The following bugs are resolved with this release:
1473 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1474 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1475 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1476 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1477 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1478 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1479 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1481 * New locales: bo_CN, bo_IN, shs_CA.
1483 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1485 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1486 Implemented by Pravin Satpute.
1488 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1490 * nscd caches now all timeouts for DNS entries
1491 Implemented by Ulrich Drepper.
1493 * nscd is more efficient and wakes up less often.
1494 Implemented by Ulrich Drepper.
1496 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1497 vdprintf, and obstack_vprintf.
1498 Implemented by Jakub Jelinek.
1500 * Faster memset for x86-64.
1501 Implemented by Harsha Jagasia and H.J. Lu.
1503 * Faster memcpy on x86.
1504 Implemented by Ulrich Drepper.
1506 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1507 Implemented by Ulrich Drepper.
1509 * Faster sqrt and sqrtf implemention for some PPC variants.
1510 Implemented by Steven Munroe.
1514 * The following bugs are resolved with this release:
1516 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1517 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1518 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1519 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1520 5071, 5103, 5104, 5112, 5113, 5184, 5186
1522 * More checking functions: fread, fread_unlocked, open*, mq_open.
1523 Implemented by Jakub Jelinek and Ulrich Drepper.
1525 * Extend fortification to C++. Implemented by Jakub Jelinek.
1527 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1528 by not recognizing 'a' as a modifier when those specs are requested.
1529 Implemented by Jakub Jelinek.
1531 * PPC optimizations to math and string functions.
1532 Implemented by Steven Munroe.
1534 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1535 options to be passed. Implemented by Ulrich Drepper.
1537 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1539 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1540 Implemented by Ulrich Drepper.
1542 * Handle private futexes in the NPTL implementation.
1543 Implemented by Jakub Jelinek and Ulrich Drepper.
1545 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1546 Implemented by Roland McGrath and Ulrich Drepper.
1548 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1550 * SHA-256 and SHA-512 based password encryption.
1551 Implemented by Ulrich Drepper.
1553 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1554 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1557 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1558 Implemented by Ulrich Drepper.
1562 * The following bugs are resolved with this release:
1564 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1565 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1566 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1567 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1568 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1569 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1570 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1573 * New Linux interfaces: epoll_pwait, sched_getcpu.
1575 * New generic interfaces: strerror_l.
1577 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1581 * The following bugs are resolved with this release:
1583 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1584 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1585 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1586 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1587 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1588 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1589 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1590 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1591 3225, 3251, 3252, 3253, 3273
1593 * For Linux, the sorting of addresses returned by getaddrinfo now also
1594 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1595 Implemented by Ulrich Drepper.
1597 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1598 Implemented by Ulrich Drepper.
1600 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1602 * New iconv module for MIK. Contributed by Alexander Shopov.
1604 * For sites with broken group and/or passwd database, the auto-propagate
1605 option of nscd can prevent creating ID lookup entries from the results
1606 of a name lookup and vice versa. This usually is no problem but some
1607 site might have problems with the default behavior.
1608 Implemented by Ulrich Drepper.
1610 * Iterating over entire database in NIS can be slow. With the
1611 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1612 to trade time for memory. The entire database will be read at once.
1613 Implemented by Ulrich Drepper.
1615 * The interfaces introduced in RFC 3542 have been implemented by
1618 * Support for the new ELF hash table format was added by Ulrich Drepper.
1620 * Support for priority inheritance mutexes added by Jakub Jelinek and
1623 * Support for priority protected mutexes added by Jakub Jelinek.
1625 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1626 or_IN, csb_PL, fy_NL, sr_ME.
1630 * More overflow detection functions.
1632 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1633 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1635 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1636 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1637 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1638 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1639 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1640 by Masahide Washizawa.
1642 * It is now possible to install audit libraries for the dynamic linker using
1643 LD_AUDIT. Implemented by Ulrich Drepper.
1645 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1646 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1647 For a libc and libpthread that works well on Linux 2.4 kernels, we
1648 recommend using the stable 2.3 branch.
1650 * The new function open_wmemstream acts like open_memstream,
1651 but uses a wchar_t wide character buffer.
1653 * The new function ppoll is an improved version of poll, similar to pselect.
1655 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1656 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1657 renameat, unlinkat, linkat, symlinkat, readlinkat.
1659 * New Linux kernel system calls: unshare,
1660 inotify_init, inotify_add_watch, inotify_rm_watch.
1662 * The euidaccess function is now also known by the alias eaccess,
1663 for compatibility with some other systems.
1665 * Timezone data updated to 2006b version.
1669 * The following bugs are resolved with this release:
1671 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1672 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1673 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1674 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1675 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1676 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1678 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1680 * As of this release, GCC 4 can be used to compile the C Library.
1682 * Timezone data updated to 2005m version.
1686 * The following bugs are resolved with this release:
1688 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1689 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1690 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1691 777, 787, 821, 822, 823, 825
1693 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1697 * Support for RFC 3678. Real implementations exist only for Linux so far.
1698 Implemented by Ulrich Drepper.
1700 * nscd can now cache entries persistently. Expiring entries are reloaded.
1701 For speedups the cache can be shared in memory with client processes.
1702 Implemented by Ulrich Drepper.
1704 * nscd can now perform SELinux checks.
1705 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1707 * getaddrinfo queries are now cached. Canonical name lookup is performed
1709 Implemented by Ulrich Drepper.
1711 * The nothrow function attribute is used when headers are used by gcc when
1712 compiling C code. This can avoid significant amounts of exception
1715 * The malloc functions perform more error checking and are stricter when
1716 it comes to reacting on errors. The default action is to terminate
1717 the process after showing an error message. Implemented by Ulrich Drepper.
1719 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1720 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1722 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1723 namespaces using the new function dlmopen(). This feature is of course,
1724 like most other dynamic loading functionality, not available in statically
1725 linked applications. Implemented by Ulrich Drepper.
1727 * Low-overhead boundary checking variants of string and some stdio functions
1728 were added. These are to be used in conjunction with a gcc patch by
1729 Jakub Jelinek which adds calls to these functions if possible.
1730 Implemented by Jakub Jelinek and Ulrich Drepper.
1732 * Old code for several operating systems and machine architectures that
1733 have not been in working condition in a long time have been removed from
1734 the main source tree maintained by the GNU C Library's maintainers.
1735 These files are now reside in the separate `ports' source module
1736 that is usable as an add-on when building the library.
1740 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1741 interrogate the dynamic linker, compatible with the Solaris interface.
1743 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1744 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1746 * getifaddrs now uses the netlink interface on Linux to get its information.
1747 Implemented by Thorsten Kukuk.
1749 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1750 Implemented by Ulrich Drepper.
1752 * support for non-executable stacks on x86 has been added. Changes mostly
1755 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1758 * getaddrinfo now performs destination address selection according to
1763 * Thread-safe interfaces for many functions that access locale data
1764 were added in version 2.3, but these features were omitted from NEWS.
1765 Many functions have variants with an `_l' suffix that take a `locale_t'
1766 object as a parameter rather than consulting the current locale.
1767 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1768 create and maintain `locale_t' objects. Additionally, the new function
1769 `uselocale' sets "the current locale" (as used by functions not so
1770 parameterized) set for an individual thread. These features were added
1771 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1773 * The functions getresuid, getresgid, setresuid, and setresgid, which
1774 have long been available on Linux, are now declared in <unistd.h>
1775 and are now also available on the Hurd.
1777 * ELF thread-local storage support (TLS) now works on x86-64.
1779 * The new dynamic string token $LIB is expanded in shared library names.
1780 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1782 * Aldy Hernandez contributed complete software floating point support for
1783 PowerPC machines with no FPU.
1785 * fexecve is implemented on Linux.
1787 * The `btowc' function should work at least twice as fast due to
1788 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1790 * With approriate thread add-ons cancelable functions are now implemented
1791 in libc.so as well. No need to call the function in libpthread. This
1792 change allowed to finally disable the incorrect and expensive handling
1793 of weak definition in ld.so.
1795 * Yet more PLT entries in libc.so have been removed. We finally arrived
1796 at the bare minimum. Startup times improved appropriately.
1798 * Support for the new Linux/x86 system call interface was added. The
1799 AT_SYSINFO auxiliary vector entry is recognized and handled.
1803 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1806 * iconv (the program and the interface) now accepts empty names (excluding
1807 options like //TRANSLIT) to mean "use charset of current locale".
1809 * localedef can now transliterate characters in strings which are not in
1810 the provided charmap. The information from the input locale is used.
1812 * Prelinking support was added for ELF targets. This requires additional
1813 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1815 * Read-only stdio streams now use mmap to speed up operation by eliminating
1816 copying and buffer underflows. To use add 'm' to the mode string of
1817 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1819 * The malloc functions were completely rewritten by Wolfram Gloger based
1820 on Doug Lea's malloc-2.7.0.c.
1822 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1823 implementation of regex.
1825 * Bruno Haible upgraded the iconv and locale implementation to support
1828 * Contents of the LC_* and LANG environment variables in the CEN style are
1829 not recognized anymore. It never was used. Change by Ulrich Drepper.
1831 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1832 thread-local storage (TLS) ABI on some platforms.
1833 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1835 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1836 EUC-JISX0213, and TSCII.
1838 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1839 BSD-compatible interface for getting all network interface addresses.
1840 Implementation for IPv4 by Roland McGrath.
1842 * Loading of locale data is faster due to the introduction of a locale
1843 archive. Implemented by Roland McGrath and Ulrich Drepper.
1845 * Startup times are significantly reduced by not using exported functions
1846 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1849 * Steven Munroe contributed a port to PowerPC64/Linux.
1853 * The Hurd now uses the GNU libio implementation of stdio rather than the
1854 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1856 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1857 with the same behavior as the Linux system call of the same name.
1861 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1862 128-bit long double format.
1864 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1865 IBM1161, and IBM1162 charsets.
1867 * Andreas Jaeger contributed a port to x86-64/Linux.
1869 * Peter Bruin contributed a port to PowerPC/Hurd.
1871 * libc functions using I/O streams now can handle wide-oriented streams
1874 * optimizations in the dynamic linker. Binaries created by recent binutils
1875 versions start up quicker due to reduced time spent on relocations.
1877 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1881 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1882 asinh, atanh, j0 for the 128-bit long double format.
1884 * Bruno Haible updated all the code handling Unicode in some form to
1885 support Unicode 3.1.
1887 * Speed of regex for single-byte locales is back to previous levels.
1888 Patch by Isamu Hasegawa.
1890 * Alpha, SPARC, and IA-64 now also using floating stacks.
1892 * Startup time of internationalized applications greatly improved through
1893 iconv cache. Use iconvconfig to generate the cache file.
1894 Contributed by Ulrich Drepper.
1896 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1897 severe performance problems. Patch by David Mosberger.
1899 * The Hurd port got a lot more functionality like AIO, various stdio
1900 extensions, etc. Mainly done by Roland McGrath.
1902 * mtrace can now lookup symbols in shared libraries.
1906 * Intel's IA-64 math library is largely integrated. It provides fast and
1907 accurate implementatations for most basic and standard math functions
1908 in float, double, and long double format.
1910 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1911 and asin for the 96-bit long double format and asin, log, tan for the
1912 128-bit long double format.
1914 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1915 The basic double functions exist today. Contributed by Abraham Ziv
1916 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1917 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1919 * An asynchronous name lookup library was added. The interface is designed
1920 after POSIX AIO. The proposal was circulated beforehand to get comments.
1921 No negative ones came in. Implemented by Ulrich Drepper.
1923 * Port to S390/64bit contributed by Martin Schwidefsky
1924 <schwidefsky@de.ibm.com>.
1926 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1927 of functions for Linux/IA-64.
1929 * The RPC code is now thread safe. Threads can now use the same service
1930 of different services at the same time. Patch by Eric Norum
1931 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1933 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1934 family of functions for Linux/S390.
1936 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1937 of functions for Linux/x86.
1939 * Port to Linux/CRIS contributed by Axis Communications.
1943 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1944 we can now check for namespace violations and missing declarations. The
1945 result is that almost all headers are now Unix-compliant (as defined in
1946 the upcoming XPG6). The negative side is that some programs might need
1947 corrections, too, if they depend on the incorrect form of the headers in
1948 previous versions which defined too many symbols and included too many
1951 * regex now handles multibyte character sets correctly.
1952 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1954 * iconv (the program) does now conform to the upcoming XPG6 and handles
1955 charmaps. Instead of the charset names the path of charmaps can be
1956 provided and the conversion happens based on this data.
1957 Contributed by Ulrich Drepper.
1959 * The locale program now provides detailed information about the installed
1964 only lists the names of the supported locales
1968 provides details such as country, language, and codeset name.
1969 Contributed by Ulrich Drepper.
1973 * The gencat program now parses the input file according to the charset
1974 selected by the LC_CTYPE category. This is important for stateful
1975 character sets. To make generating catalogs easier there is a way
1976 to overwrite the charset selected by the locale: before the first
1977 message or $ quote line the catalog can contain a line like
1979 $ codeset=ISO-8859-2
1981 to select the charset (ISO-8859-2 in this case).
1983 Implemented by Shinya Hanataka and Ulrich Drepper.
1985 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1986 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1987 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1989 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1990 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1992 * The LANGUAGE environment variable is now ignored unless the locale is
1993 changed from the default "C" locale.
1995 * The usual bug fixes.
1999 * Greg McGary added runtime support for bounds checking using gcc's
2000 new -fbounded-pointers option. ix86 target is complete. PowerPC
2003 * Thorsten Kukuk added secure mode support to nscd.
2005 * The Berkeley db libraries have been removed.
2007 Related, the nss_db module is now in a separate package since it
2008 obviously requires a database library being available.
2010 * Wide character I/O streams implemented by Ulrich Drepper.
2012 * Functions from the extended socket API added by Ulrich Drepper.
2014 * Functions feenableexcept and fedisableexcept to control the
2015 behaviour of individual exceptions have been added by Andreas Jaeger.
2017 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
2019 * The resolver code has been updated from bind 8.2.3-T5B which supports
2020 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
2023 This change could in some situations effect backward compatibility. Since
2024 now `_res' is a thread-local instead of a global variable, modifying it
2025 in one thread does not have any effect in other threads.
2027 The resolver library was also extended to allow IPv6 as the transport
2028 protocol for the requests. This work was done by Stig Venaas.
2030 * Compatibility code for K&R C compilers has been removed from the
2031 header files. A ISO C compiler is needed to use the library
2032 (conforming to either C89 or C99 standard).
2034 * Complete rewrite of the localedef program to support multibyte character
2035 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
2036 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
2037 Implemented by Ulrich Drepper.
2039 Bruno Haible significantly improved the generation and use of the data
2040 structures for the wide character tables.
2042 * Plural handling in gettext implemented by Ulrich Drepper.
2044 * The utmp daemon has been removed.
2046 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2048 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2051 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2053 * POSIX barriers implemented by Kaz Kylheku.
2055 * POSIX spawn function family implemented by Ulrich Drepper.
2057 * POSIX spinlocks are now available.
2059 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2061 * the configure option --enable-kernel=X.Y.Z allows to strip out
2062 compatibility for kernel versions before X.Y.Z. This is currently only
2063 implemented for Linux.
2065 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2066 field sin6_scope_id. This means that all programs using IPv6 should be
2067 recompiled. Don't expect binary compatibility with previous glibc
2070 * various conversion modules for IBM character sets contributed by
2073 * IA-64 port by Jes Sorensen and HJ Lu.
2087 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2089 * New xdr functions are added; some rpc functions are now 64bit clean.
2091 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2093 * Fixed known incompatibilities with glibc 2.0.
2095 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2097 * Optimized a number of functions (especially the ELF dynamic loader).
2099 * Update timezone data files.
2101 * lots of charmaps corrections
2103 * some new locale definitions and charmaps
2108 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2109 conform to POSIX member type requirements. Symbol versions have been
2110 adjusted as needed within the library, and for direct use by applications,
2111 but there is potential for problems if third-party libraries use
2112 struct timeval as part of their interface. This does not present
2113 a problem for X and other "essential" system libraries.
2115 * An additional locale model to support C++ Standard Library locale
2116 model and probably more was implemented by Ulrich Drepper.
2118 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2121 * Miles Bader provided the `argp' function family to support hierachical
2122 command line argument parsing, layered on top of getopt.
2124 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2126 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2129 * scanf recognizes the %a and %A format for scanning floating point numbers.
2131 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2132 information and interfaces for the available integer types.
2134 * about 130 new math functions were added to implement the ISO C9x math
2137 * the new header <complex.h> contains definitions of the complex math
2138 functions from ISO C 9X.
2140 * the new header <tgmath.h> defines generic macros to use complex or
2141 real valued functions.
2143 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2145 * Andreas Jaeger provided a test suite for the math library.
2147 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2149 * Ulrich Drepper added character set conversion functions (iconv).
2151 * Optimized string functions have been added.
2153 * The localedata addon is now part of glibc.
2155 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2157 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2158 daemon for NSS (nscd).
2160 Missing a better place here are some numbers on improvements. Under
2161 Linux 2.1.125 un-tar-ing the kernel sources takes
2165 using local files 12.19s 6.88s 22.91s
2167 using NIS 13.92s 8.91s 26.34s
2169 using NIS & nscd 10.37s 7.34s 25.30s
2171 using NIS+ 27.57s 30.37s 640.46s
2173 using NIS+ & nscd 10.25s 7.83s 26.51s
2175 using NIS & old nscd [1] 13.83s 8.32s 29.60s
2177 Keep in mind that non-namelookup related operations dominate above times.
2178 It was just a common complain that using NIS+ unpacking the kernel is
2181 [1] The old nscd implementation is not available anymore since it was
2182 distributed with glibc up to version 2.0.98 and thus is now replaced.
2184 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
2186 * Mark Kettenis provided a Hesiod NSS module.
2188 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
2189 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
2191 * rcmd can now handle netgroups (Dick Streefland).
2193 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
2196 * Support for the IPv6 protocol has been added to the socket API, as per the
2197 latest draft standards.
2199 * Support for Linux 2.2 has been added.
2201 * Interface changes relative to the latest 2.0.x release:
2202 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2203 addseverity NEW: Unix98
2204 alphasort64 NEW: LFS
2205 argp_err_exit_status NEW: argp, GNU ext
2206 argp_error NEW: argp, GNU ext
2207 argp_failure NEW: argp, GNU ext
2208 argp_help NEW: argp, GNU ext
2209 argp_parse NEW: argp, GNU ext
2210 argp_program_bug_address NEW: argp, GNU ext
2211 argp_program_version NEW: argp, GNU ext
2212 argp_program_version_hook NEW: argp, GNU ext
2213 argp_state_help NEW: argp, GNU ext
2214 argp_usage NEW: argp, GNU ext
2215 authdes_create NEW: Secure RPC
2216 authdes_getucred NEW: Secure RPC
2217 authdes_pk_create NEW: Secure RPC
2218 backtrace NEW: GNU ext.
2219 backtrace_symbols NEW: GNU ext.
2220 backtrace_symbols_fd NEW: GNU ext.
2222 cacosf NEW: ISO C 9x
2223 cacosh NEW: ISO C 9x
2224 cacoshf NEW: ISO C 9x
2225 cacoshl NEW: ISO C 9x
2226 cacosl NEW: ISO C 9x
2233 casinf NEW: ISO C 9x
2234 casinh NEW: ISO C 9x
2235 casinhf NEW: ISO C 9x
2236 casinhl NEW: ISO C 9x
2237 casinl NEW: ISO C 9x
2239 catanf NEW: ISO C 9x
2240 catanh NEW: ISO C 9x
2241 catanhf NEW: ISO C 9x
2242 catanhl NEW: ISO C 9x
2243 catanl NEW: ISO C 9x
2244 cbc_crypt NEW: Secure RPC
2248 ccoshf NEW: ISO C 9x
2249 ccoshl NEW: ISO C 9x
2255 cimagf NEW: ISO C 9x
2256 cimagl NEW: ISO C 9x
2257 clearerr_locked REMOVED
2258 clntunix_create NEW: sunrpc ext
2260 clog10 NEW: ISO C 9x
2261 clog10f NEW: ISO C 9x
2262 clog10l NEW: ISO C 9x
2272 cprojf NEW: ISO C 9x
2273 cprojl NEW: ISO C 9x
2275 crealf NEW: ISO C 9x
2276 creall NEW: ISO C 9x
2281 csinhf NEW: ISO C 9x
2282 csinhl NEW: ISO C 9x
2285 csqrtf NEW: ISO C 9x
2286 csqrtl NEW: ISO C 9x
2290 ctanhf NEW: ISO C 9x
2291 ctanhl NEW: ISO C 9x
2293 des_setparity NEW: Secure RPC
2294 ecb_crypt NEW: Secure RPC
2295 endutxent NEW: Unix98
2297 exp10f NEW: ISO C 9x
2298 exp10l NEW: ISO C 9x
2302 fattach NEW: STREAMS
2303 fdetach NEW: STREAMS
2307 feclearexcept NEW: ISO C 9x
2308 fegetenv NEW: ISO C 9x
2309 fegetexceptflag NEW: ISO C 9x
2310 fegetround NEW: ISO C 9x
2311 feholdexcept NEW: ISO C 9x
2313 feraiseexcept NEW: ISO C 9x
2314 ferror_locked REMOVED
2315 fesetenv NEW: ISO C 9x
2316 fesetexceptflag NEW: ISO C 9x
2317 fesetround NEW: ISO C 9x
2318 fetestexcept NEW: ISO C 9x
2319 feupdateenv NEW: ISO C 9x
2320 fflush_locked REMOVED
2324 fgets_unlocked NEW: GNU ext.
2325 fileno_locked REMOVED
2337 fputc_locked REMOVED
2338 fputs_unlocked NEW: GNU ext.
2339 fread_unlocked NEW: GNU ext.
2344 fstatvfs NEW: Unix98
2348 ftruncate64 NEW: LFS
2350 fwrite_unlocked NEW: GNU ext.
2351 gai_strerror NEW: IPv6
2355 getchar_locked REMOVED
2357 getdate_err NEW: Unix98
2358 getdate_r NEW: GNU ext.
2360 getnameinfo NEW: IPv6
2361 getnetname NEW: Secure RPC
2362 getpmsg NEW: STREAMS
2363 getpt NEW: Unix98 PTY
2364 getrlimit64 NEW: LFS
2365 getutxent NEW: Unix98
2366 getutxid NEW: Unix98
2367 getutxline NEW: Unix98
2368 glob64 NEW: GNU ext.
2369 globfree64 NEW: GNU ext.
2370 gnu_get_libc_release NEW: GNU ext.
2371 gnu_get_libc_version NEW: GNU ext.
2372 grantpt NEW: Unix98 PTY
2373 host2netname NEW: Secure RPC
2375 iconv_close NEW: iconv
2376 iconv_open NEW: iconv
2377 if_freenameindex NEW: IPv6
2378 if_indextoname NEW: IPv6
2379 if_nameindex NEW: IPv6
2380 if_nametoindex NEW: IPv6
2381 in6addr_any NEW: IPv6
2382 in6addr_loopback NEW: IPv6
2383 inet6_isipv4mapped NEW: IPv6
2384 isastream NEW: STREAMS
2385 iswblank NEW: GNU ext.
2386 key_decryptsession NEW: Secure RPC
2387 key_decryptsession_pk NEW: Secure RPC
2388 key_encryptsession NEW: Secure RPC
2389 key_encryptsession_pk NEW: Secure RPC
2390 key_gendes NEW: Secure RPC
2391 key_get_conv NEW: Secure RPC
2392 key_secretkey_is_set NEW: Secure RPC
2393 key_setnet NEW: Secure RPC
2394 key_setsecret NEW: Secure RPC
2395 llrint NEW: ISO C 9x
2396 llrintf NEW: ISO C 9x
2397 llrintl NEW: ISO C 9x
2398 llround NEW: ISO C 9x
2399 llroundf NEW: ISO C 9x
2400 llroundl NEW: ISO C 9x
2405 lrintf NEW: ISO C 9x
2406 lrintl NEW: ISO C 9x
2407 lround NEW: ISO C 9x
2408 lroundf NEW: ISO C 9x
2409 lroundl NEW: ISO C 9x
2411 makecontext NEW: Unix98
2412 mempcpy NEW: GNU ext.
2415 modify_ldt NEW: kernel
2419 nearbyint NEW: ISO C 9x
2420 nearbyintf NEW: ISO C 9x
2421 nearbyintl NEW: ISO C 9x
2422 netname2host NEW: Secure RPC
2423 netname2user NEW: Secure RPC
2424 nexttoward NEW: ISO C 9x
2425 nexttowardf NEW: ISO C 9x
2426 nexttowardl NEW: ISO C 9x
2430 passwd2des NEW: Secure RPC
2432 pow10f NEW: GNU ext.
2433 pow10l NEW: GNU ext.
2436 printf_size NEW: GNU ext.
2437 printf_size_info NEW: GNU ext.
2438 profil_counter REMOVED
2439 pthread_mutexattr_getkind_np REPLACED
2440 pthread_mutexattr_setkind_np REPLACED
2441 ptsname NEW: Unix98 PTY
2442 ptsname_r NEW: Unix98 PTY
2444 putchar_locked REMOVED
2445 putgrent NEW: GNU ext.
2447 putpmsg NEW: STREAMS
2448 pututxline NEW: Unix98
2452 readdir64_r NEW: LFS
2453 remquo NEW: ISO C 9x
2454 remquof NEW: ISO C 9x
2455 remquol NEW: ISO C 9x
2457 roundf NEW: ISO C 9x
2458 roundl NEW: ISO C 9x
2460 scalbln NEW: ISO C 9x
2461 scalblnf NEW: ISO C 9x
2462 scalblnl NEW: ISO C 9x
2464 sendfile NEW: kernel
2465 setcontext NEW: Unix98
2466 setrlimit64 NEW: LFS
2467 setutxent NEW: Unix98
2469 sigignore NEW: Unix98
2470 sigqueue NEW: POSIX.1b
2471 sigrelse NEW: Unix98
2472 sigset NEW: POSIX.1b
2473 sigtimedwait NEW: POSIX.1b
2474 sigwaitinfo NEW: POSIX.1b
2475 sincos NEW: GNU ext.
2476 sincosf NEW: GNU ext.
2477 sincosl NEW: GNU ext.
2481 strcasestr NEW: GNU ext.
2482 strtoimax NEW: ISO C 9x
2483 strtoumax NEW: ISO C 9x
2484 strverscmp NEW: GNU ext.
2485 svcauthdes_stats NEW: Secure RPC
2486 svcunix_create NEW: sunrpc etx
2487 svcunixfd_create NEW: sunrpc ext
2488 swapcontext NEW: Unix98
2489 tcgetsid NEW: Unix98 PTY
2490 tdestroy NEW: GNU ext.
2491 tgamma NEW: ISO C 9x
2492 tgammaf NEW: ISO C 9x
2493 tgammal NEW: ISO C 9x
2497 truncf NEW: ISO C 9x
2498 truncl NEW: ISO C 9x
2500 unlockpt NEW: Unix98 PTY
2501 updwtmpx NEW: Unix98
2502 user2netname NEW: Secure RPC
2503 utmpxname NEW: Unix98
2504 versionsort NEW: GNU ext.
2505 versionsort64 NEW: GNU ext.
2507 wcscasecmp NEW: GNU ext.
2508 wcsncasecmp NEW: GNU ext.
2509 wcsnlen NEW: GNU ext.
2510 wcstoimax NEW: ISO C 9x
2511 wcstoll NEW: ISO C 9x
2512 wcstoull NEW: ISO C 9x
2513 wcstoumax NEW: ISO C 9x
2515 wordexp NEW: POSIX.2
2516 wordfree NEW: POSIX.2
2517 write_profiling REMOVED
2518 xdecrypt NEW: Secure RPC
2519 xdr_authdes_cred NEW: Secure RPC
2520 xdr_authdes_verf NEW: Secure RPC
2521 xdr_cryptkeyarg NEW: Secure RPC
2522 xdr_cryptkeyarg2 NEW: Secure RPC
2523 xdr_cryptkeyres NEW: Secure RPC
2524 xdr_getcredres NEW: Secure RPC
2525 xdr_key_netstarg NEW: Secure RPC
2526 xdr_key_netstres NEW: Secure RPC
2527 xdr_keybuf NEW: Secure RPC
2528 xdr_keystatus NEW: Secure RPC
2529 xdr_netnamestr NEW: Secure RPC
2530 xdr_sizeof NEW: Secure RPC
2531 xdr_unixcred NEW: sunrpc ext
2532 xencrypt NEW: Secure RPC
2533 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2544 * inet_ntoa is thread-safe
2546 * updwtmp is moved from libutil to libc
2548 * rewrite of cbrt function
2550 * update of timezone data
2564 * add atoll function
2566 * fix complex problems in Berkeley DB code
2568 * fix math functions
2572 * fixed lots of header problems (especially Linux/GNU specific)
2574 * dynamic loader preserves all registers
2576 * Roland McGrath provided support for handling of auxiliary objects in
2577 the ELF dynamic loader.
2579 * support for parallel builds is improved
2583 * GNU extensions are no longer declared by default. To enable them you
2584 must define the macro `_GNU_SOURCE' in your program or compile with
2587 * The library has changed from using GNU ld symbol aliases to using weak
2588 symbols where available. The ELF object file format supports weak
2589 symbols; GNU ld also supports weak symbols in the a.out format. (There
2590 is also now support for other GNU ld extensions in ELF. Use the
2591 `--with-elf' option to configure to indicate you have ELF, and
2592 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2593 of many files which contained only symbol aliases, reducing the size of
2594 the source and the compiled library; many other files were renamed to
2595 less cryptic names previously occupied by the symbol alias files.
2596 There is a new header file <elf.h> for programs which operate on
2597 files in the ELF format.
2599 * Converted to Autoconf version 2, so `configure' has more options.
2600 Run `configure --help' to see the details.
2602 * The library can now be configured to build profiling, highly-optimized
2603 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2604 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2605 `configure' enable building these extra libraries. The shared library is
2606 built by default when using both ELF and GNU ld. When shared libraries
2607 are enabled, the new library `-ldl' is available for arbitrary run-time
2608 loading of shared objects; its interface is defined in <dlfcn.h>. The
2609 new header file <link.h> gives access to the internals of the run-time
2610 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2611 application of same name on other systems and it provides information
2612 about dynamically linked binaries.
2614 * The C library now provides the run-time support code for profiling
2615 executables compiled with `-pg'. Programs can control the profiling code
2616 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2617 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2618 the support for this file format was contributed by David Mosberger-Tang.
2620 * The math code has been replaced with a math library based on fdlibm from
2621 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2622 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2623 functions. The math functions now reside in a separate library, so
2624 programs using them will need to use `-lm' their linking commands.
2626 * John C. Bowman contributed optimized ix87 assembler inline functions.
2628 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2629 mechanism similar to that found in Solaris 2. This is now used for the
2630 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2631 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2632 file controls what services are used for each individual database. This
2633 works by loading shared libraries with names specified in `nsswitch.conf',
2634 so service modules can be changed or added at any time without even
2635 relinking any program. Currently there are the file, db, and NIS based
2636 NSS services available.
2638 * The new functions `strtoq' and `strtouq' parse integer values from
2639 strings, like `strtol' and `strtoul', but they return `long long int' and
2640 `unsigned long long int' values, respectively (64-bit quantities).
2642 * The new functions `strtof' and `strtold' parse floating-point values from
2643 strings, like `strtod', but they return `float' and `long double' values,
2644 respectively (on some machines `double' and `long double' are the same).
2646 * Ulrich Drepper has contributed new implementations of the floating-point
2647 printing and reading code used in the `printf' family of functions and
2648 `strtod', `strtof', and `strtold'. These new functions are perfectly
2649 accurate, and much faster than the old ones.
2651 * The implementation of the POSIX locale model was completely rewritten by
2652 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2653 to compile the POSIX locale definition.
2655 * The former dummy implementations of the strcoll and strxfrm function are
2656 now replaced by fully functional code contributed by Ulrich Drepper. The
2657 collation information comes from the POSIX locale definitions.
2659 * The new header <langinfo.h> defines an interface for accessing
2660 various locale-dependent data (using the locale chosen with `setlocale').
2662 * Ulrich Drepper has contributed a new suite of functions for operation on
2663 wide-character and multibyte-character strings, in <wchar.h>;
2664 and classification and case conversion of wide characters, in <wctype.h>.
2665 These new functions are conforming to the ISO C, Amendement 1 specification.
2667 * There is now a second implementation of the standard I/O library available.
2668 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2669 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2671 * You can now use positional parameter specifications in format strings
2672 for the `printf' and `scanf' families of functions. For example,
2673 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2674 ``Number 6, Mr Jones''. This is mainly useful when providing different
2675 format strings for different languages, whose grammars may dictate
2676 different orderings of the values being printed. To support this
2677 feature, the interface for `register_printf_handler' has changed; see
2678 the header file <printf.h> for details.
2680 * The `printf' and `scanf' families of functions now understand a new
2681 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2682 to group numbers as indicated by the locale; for `scanf' and friends, this
2683 says to accept as valid only a number with all the proper grouping
2684 separators in the right places. In the default "C" locale, numbers are
2685 not grouped; but locales for specific countries will define the usual
2686 conventions (i.e. separate thousands with `,' in the US locale).
2688 * The pgrp functions have been regularized, slightly incompatibly but much
2689 less confusingly. The core functions are now `getpgid' and `setpgid',
2690 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2691 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2692 provided for compatibility. There is no longer an incompatible `getpgrp'
2693 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2695 * The new header file <fts.h> and suite of functions simplify programs that
2696 operate on directory trees. This code comes from 4.4 BSD.
2698 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2699 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2700 NSS scheme used in glibc.
2702 * There is a new malloc debugging hook `__memalign_hook'.
2704 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2705 `unsigned int' in <sys/types.h>. These are for compatibility only and
2706 their use is discouraged.
2708 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2709 done differently, so that it works even without GNU ld.
2711 * New function `euidaccess' checks allowed access to a file like `access',
2712 but using the effective IDs instead of the real IDs.
2714 * The time zone data files have been updated for the latest and greatest
2715 local time conventions of the countries of the world.
2717 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2720 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2721 for formatting floating-point numbers. They are provided only for
2722 compatibility; new programs should use `sprintf' instead. There are
2723 also equivalent function for the `long double' floating-point type and
2724 all functions also exist in a reentrant form.
2726 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2727 functions for maintaining the login-record files (primarily of use to
2728 system programs such as `login'), and convenient functions for
2729 allocating and initializing a pseudo-terminal (pty) device.
2731 * Ulrich Drepper has contributed new support for System V style
2732 shared memory and IPC on systems that support it.
2734 * Ulrich Drepper has contributed several miscellaneous new functions found
2735 in System V: The `hsearch' family of functions provide an effective
2736 implementation of hash tables; `a64l' and `l64a' provide a very simple
2737 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2740 * Ulrich Drepper has contributed new reentrant counterparts for the
2741 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2743 * Ulrich Drepper has contributed new, highly-optimized versions of several
2744 string functions for the i486/Pentium family of processors.
2746 * Ulrich Drepper has updated the Linux-specific code, based largely
2747 on work done in Hongjiu Lu's version of GNU libc for Linux.
2748 The GNU library now supports Linux versions 2.0.10 and later,
2749 using the ELF object file format (i[3456]86-*-linux).
2751 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2753 * David Mosberger-Tang and Richard Henderson have ported the C library
2754 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2755 dynamic linking support for ELF/Alpha.
2757 * Richard Henderson contributed several Alpha optimized assembler function
2758 for arithmetic and string handling.
2760 * Ulrich Drepper has contributed a new set of message catalog functions to
2761 support multiple languages using the <libintl.h> interface, for use with
2762 his new package GNU gettext. Translation volunteers have contributed
2763 catalogs of the library's messages in Spanish, German, and Korean.
2765 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2766 program and the `catgets' function for reading the catalog files it
2767 creates. (The <libintl.h> interface is preferred; we include the
2768 <nl_types.h> interface using `catgets' only for source compatibility with
2769 programs already written to use it.)
2771 * New header file <values.h> gives SVID-compatible names for <limits.h>
2774 * Various new macros, declarations, and small header files for compatibility
2777 * New function `group_member' is a convenient way to check if a process has
2778 a given effective group ID.
2780 * When using GCC 2.7 and later, the socket functions are now declared in a
2781 special way so that passing an argument of type `struct sockaddr_in *',
2782 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2783 `struct sockaddr *' type, does not generate a type-clash warning.
2785 * New function `error' declared in header file <error.h> is a convenient
2786 function for printing error messages and optionally exiting; this is the
2787 canonical function used in GNU programs. The new functions `err', `warn',
2788 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2789 doing the same thing.
2791 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2792 POSIX.2 `glob' function to do ~ and {...} expansion.
2794 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2795 `clearenv' which is used in POSIX.9 is also available.
2797 * New function `getsid' returns session ID number on systems that support it.
2799 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2800 files <db.h> and <mpool.h> provide a rich set of functions for several
2801 types of simple databases stored in memory and in files, and <ndbm.h> is
2802 an old `ndbm'-compatible interface using the `db' functions. Link with
2803 `-ldb' to get these functions.
2805 * New macro `strdupa' copies a string like `strdup', but uses local stack
2806 space from `alloca' instead of dynamic heap space from `malloc'.
2808 * New function `strnlen' is like `strlen' but searches only a given maximum
2809 number of characters for the null terminator. `stpncpy', `strndup' and
2810 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2813 * New function `statfs' in header <sys/statfs.h>.
2815 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2816 provide convenient functions for operating on blocks of null-terminated
2819 * A new suite of functions in <utmp.h> handle all the details of reading
2820 and writing the utmp file.
2822 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2825 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2826 completely POSIX compliant and also implemented the extended functionality
2827 to handle alternate digit representation and alternate era date formats.
2829 * Ulrich Drepper provided an implementation of the `strptime' function
2830 defined in XPG4.2 which transforms a string into a `struct tm' value.
2832 * Paul Eggert provided the tzselect shell script as part of the timezone
2833 code. The shell script makes it easy to select the correct timezone
2836 * The implementation of the malloc family of functions is completely replaced
2837 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2838 The implementation uses the mmap function (if available) and it is
2839 optimized for the use in multi threaded programs.
2841 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2842 functions. This new functionality is usable by specifying a special
2843 salt string and it is compatible with implementation on *BSD systems.
2845 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2846 `getsubopt' to handle second level command line options, `bsd_signal'
2847 to access BSD style `signal' functionality, the obsolete `regexp' style
2850 * the `lchown' function is available on system which support this
2853 * The implementation of the shadow password handling function was contributed
2856 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2858 * POSIX.1g support was added. The <sys/select.h> header is available,
2859 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2860 implementation of `getaddrinfo'.
2864 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2866 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2867 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2869 * The new function `daemon' from 4.4 BSD is useful for server programs that
2870 want to put themselves in the background.
2872 * Joel Sherrill has contributed support for several standalone boards that
2873 run without an operating system.
2875 * `printf', `scanf' and friends now accept a `q' type modifier for long
2876 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2878 * All of the code taken from BSD (notably most of the math and networking
2879 routines) has been updated from the BSD 4.4-Lite release.
2881 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2883 * The new functions `getdomainname' and `setdomainname' fetch or change the
2884 YP/NIS domain name. These are system calls which exist on systems which
2887 * The time zone data files have been updated for the latest international
2890 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2891 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2895 * The C library now includes support for Sun RPC, from Sun's free
2896 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2897 are included. (There is still no support for YP.)
2899 * Tom Quinn has contributed a port of the C library to SGI machines running
2900 Irix 4 (mips-sgi-irix4).
2902 * The new `lockf' function is a simplified interface to the locking
2903 facilities of `fcntl', included for compatibility.
2905 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2907 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2909 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2912 * The error message printed by `assert' for a failed assertion now includes
2913 the name of the program (if using GNU ld) and the name of the calling
2914 function (with versions of GCC that support this).
2916 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2918 * The library now includes the <sys/mman.h> header file and memory
2919 management functions `mmap', `munmap', `mprotect', `msync', and
2920 `madvise', on systems that support those facilities.
2922 * The interface for `mcheck' has changed slightly: the function called to
2923 abort the program when an allocation inconsistency is detected now takes
2924 an argument that indicates the type of failure. The new function
2925 `mprobe' lets you request a consistency check for a particular block at
2926 any time (checks are normally done only when you call `free' or `realloc'
2929 * It is now possible to easily cross-compile the C library, building on one
2930 system a library to run on another machine and/or operating system. All
2931 you need to do is set the variable `HOST_CC' in `configparms' to the
2932 native compiler for programs to run on the machine you are building on (a
2933 few generator programs are used on Unix systems); set `CC' to the
2936 * The new function `fexecve' (only implemented on the GNU system) executes
2937 a program file given a file descriptor already open on the file.
2941 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2942 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2944 * You can set the variable `libprefix' in `configparms' to specify a prefix
2945 to be prepended to installed library files; this makes it easy to install
2946 the GNU C library to be linked as `-lgnuc' or whatever.
2948 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2949 copies a limited number of characters from a string, and returns the
2950 address of the last character written.
2952 * You no longer need to check for whether the installed `stddef.h' is
2953 compatible with the GNU C library. configure now checks for you.
2955 * You can now define a per-stream `fileno' function to convert the
2956 stream's cookie into an integral file descriptor.
2958 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2959 allocates zero bytes of storage, and returns a unique pointer which
2960 you can pass to `realloc' or `free'. The behavior is undefined if
2961 you dereference this pointer.
2963 * The C library now runs on Sony NEWS m68k machines running either
2964 NewsOS 3 or NewsOS 4.
2966 * The new `syscall' function is a system-dependent primitive function
2967 for invoking system calls. It has the canonical behavior on Unix
2968 systems, including unreliable return values for some calls (such as
2969 `pipe', `fork' and `getppid').
2971 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2972 to `EAGAIN', which is the preferred name. On systems whose kernels
2973 use two distinct codes, the C library now translates EWOULDBLOCK to
2974 EAGAIN in every system call function.
2978 * The GNU C Library Reference Manual is now distributed with the library.
2979 `make dvi' will produce a DVI file of the printed manual.
2980 `make info' will produce Info files that you can read on line using C-h i
2981 in Emacs or the `info' program.
2982 Please send comments on the manual to bug-glibc-manual@gnu.org.
2984 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2986 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2988 * Jason Merrill has contributed a port to the Sequent Symmetry running
2989 Dynix version 3 (i386-sequent-dynix).
2991 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2992 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2994 * New function `memory_warnings' lets you arrange to get warnings when
2995 malloc is running out of memory to allocate, like Emacs gives you.
2997 * The C library now contains the relocating allocator used in Emacs 19 for
2998 its editing buffers. This allocator (ralloc) minimizes allocation
2999 overhead and fragmentation by moving allocated regions around whenever it
3000 needs to. You always refer to a ralloc'd region with a "handle" (a
3001 pointer to a pointer--an object of type `void **').
3003 * There is a new `printf' format: `%m' gives you the string corresponding
3004 to the error code in `errno'.
3006 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
3007 or `%[' conversion, but instead of filling in a fixed-sized buffer you
3008 pass, the `a' modifier says to fill in a `char **' you pass with a
3011 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
3012 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
3013 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
3015 * `mkstemp' is a traditional Unix function to atomically create and open a
3016 uniquely-named temporary file.
3020 * The standard location for the file that says what the local timezone is
3021 has changed again. It is now `/usr/local/etc/localtime' (or more
3022 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
3024 * The distribution no longer contains any files with names longer than 14
3027 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
3028 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
3030 * New functions `ttyslot' and `syslog' from 4.4 BSD.
3034 * The configuration process has changed quite a bit. The `configure'
3035 script is now used just like the configuration scripts for other GNU
3036 packages. The `sysdeps' directory hierarchy is much rearranged.
3037 The file `INSTALL' explains the new scheme in detail.
3039 * The header files no longer need to be processed into ANSI C and
3040 traditional C versions. There is just one set of files to install, and
3041 it will work with ANSI or old C compilers (including `gcc -traditional').
3043 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3044 MIPS DECStation running Ultrix 4.
3046 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3047 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3048 made itself into a shared library.
3050 * Yet further improved support for the i386, running 4.3 BSD-like systems
3051 (such as Mach 3 with the Unix single-server), or System V.
3053 * New function `strncasecmp' to do case-insensitive string comparison
3054 with limited length.
3056 * New function `strsep' is a reentrant alternative to `strtok'.
3058 * New functions `scandir' and `alphasort' for searching directories.
3060 * New function `setenv' is a better interface to `putenv'.
3062 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3063 function for traversing a directory tree.
3065 * The GNU obstack package is now also part of the C library.
3066 The new function `open_obstack_stream' creates a stdio stream that
3067 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3068 formatted output directly to an obstack.
3070 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3071 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3073 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3075 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3076 things to your strings.
3078 * There are some new test programs: test-fseek, testmb, and testrand.
3080 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3081 These ports are not finished, but are a good starting place for really
3082 supporting those systems.
3084 * `/etc/localtime' is now the standard location for the file that says what
3085 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3086 This follows the general principle that `/etc' is the place for all local
3087 configuration files.
3089 * The C library header files now use `extern "C"' when used by the C++
3090 compiler, so the C library should now work with C++ code.
3092 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3093 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3096 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3097 function which uses the `merge sort' algorithm, and is said to be
3098 significantly faster than the old GNU `qsort' function. Merge sort is
3099 now the standard `qsort' function. The new algorithm can require a lot
3100 of temporary storage; so, the old sorting function is called when the
3101 required storage is not available.
3103 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3104 provides the Unix `crypt' function, plus some other entry points.
3106 * The code and header files taken from 4.4 BSD have been updated with the
3107 latest files released from Berkeley.
3109 ----------------------------------------------------------------------
3110 Copyright information:
3112 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3114 Permission is granted to anyone to make or distribute verbatim copies
3115 of this document as received, in any medium, provided that the
3116 copyright notice and this permission notice are preserved,
3117 thus giving the recipient permission to redistribute in turn.
3119 Permission is granted to distribute modified versions
3120 of this document, or of portions of it,
3121 under the above conditions, provided also that they
3122 carry prominent notices stating who last changed them.
3125 version-control: never