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 [Add important changes here]
12 Security related changes:
14 [Add security related changes here]
16 The following bugs are resolved with this release:
18 [The release manager will add the list generated by
19 scripts/list-fixed-bugs.py just before the release.]
23 * Unicode 8.0.0 Support: Character encoding, character type info, and
24 transliteration tables are all updated to Unicode 8.0.0, using new
25 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
26 These updates cause user visible changes, such as the fixes for bugs
29 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
30 kernel-internal CPU set size. This means that requests that change the
31 CPU affinity which failed before (for example, an all-ones CPU mask) will
32 now succeed. Applications that need to determine the effective CPU
33 affinities need to call sched_getaffinity or pthread_getaffinity_np after
34 setting it because the kernel can adjust it (and the previous size check
35 would not detect this in the majority of cases).
37 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
38 the following new symbols are used: fts64_children, fts64_close,
39 fts64_open, fts64_read and fts64_set.
41 * getaddrinfo now detects certain invalid responses on an internal netlink
42 socket. If such responses are received, an affected process will
43 terminate with an error message of "Unexpected error <number> on netlink
44 descriptor <number>" or "Unexpected netlink response of size <number> on
45 descriptor <number>". The most likely cause for these errors is a
46 multi-threaded application which erroneously closes and reuses the netlink
47 file descriptor while it is used by getaddrinfo.
49 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
50 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
51 unnecessary serialization of memory allocation requests across threads.
52 The defect is now corrected. Users should see a substantial increase in
53 the concurent throughput of allocation requests for applications which
54 trigger this bug. Affected applications typically create create and
55 destroy threads frequently. (Bug 19048 was reported and analyzed by
58 * There is now a --disable-timezone-tools configure option for disabling the
59 building and installing of the timezone related utilities (zic, zdump, and
60 tzselect). This is useful for people who build the timezone data and code
61 independent of the GNU C Library.
63 * The obsolete header <regexp.h> has been removed. Programs that require
64 this header must be updated to use <regex.h> instead.
66 * The obsolete functions bdflush, create_module, get_kernel_syms,
67 query_module and uselib are no longer available to newly linked binaries;
68 the header <sys/kdaemon.h> has been removed. These functions and header
69 were specific to systems using the Linux kernel and could not usefully be
70 used with the GNU C Library on systems with version 2.6 or later of the
73 * Optimized string, wcsmbs and memory functions for IBM z13.
74 Implemented by Stefan Liebler.
76 * Newly linked programs that define a variable called signgam will no longer
77 have it set by the lgamma, lgammaf and lgammal functions. Programs that
78 require signgam to be set by those functions must ensure that they use the
79 variable provided by the GNU C Library and declared in <math.h>, without
80 defining their own copy.
82 * The minimum GCC version that can be used to build this version of the GNU
83 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
84 still be used to compile programs using the GNU C Library.
86 Security related changes:
88 * An out-of-bounds value in a broken-out struct tm argument to strftime no
89 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
91 * The LD_POINTER_GUARD environment variable can no longer be used to disable
92 the pointer guard feature. It is always enabled. Previously,
93 LD_POINTER_GUARD could be used to disable security hardening in binaries
94 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
97 * An integer overflow in hcreate and hcreate_r could lead to an
98 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
100 * The catopen function no longer has unbounded stack usage. Reported by
103 * The nan, nanf and nanl functions no longer have unbounded stack usage
104 depending on the length of the string passed as an argument to the
105 functions. Reported by Joseph Myers. (CVE-2014-9761)
107 * A stack-based buffer overflow was found in libresolv when invoked from
108 libnss_dns, allowing specially crafted DNS responses to seize control
109 of execution flow in the DNS client. The buffer overflow occurs in
110 the functions send_dg (send datagram) and send_vc (send TCP) for the
111 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
112 family. The use of AF_UNSPEC triggers the low-level resolver code to
113 send out two parallel queries for A and AAAA. A mismanagement of the
114 buffers used for those queries could result in the response of a query
115 writing beyond the alloca allocated buffer created by
116 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
117 the overflow. Thanks to the Google Security Team and Red Hat for
118 reporting the security impact of this issue, and Robert Holiday of
119 Ciena for reporting the related bug 18665. (CVE-2015-7547)
121 The following bugs are resolved with this release:
123 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
124 [887] math: Math library function "logb" and "nextafter" inconsistent
125 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
126 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
127 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
128 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
130 [4404] localedata: German translation of "Alarm clock" is misleading
131 [6799] math: nextafter() and nexttoward() doen't set errno on
132 overflow/underflow errors
133 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
135 [10432] nis: _nss_nis_setnetgrent assertion failure
136 [11460] libc: fts has no LFS support
137 [12926] network: getaddrinfo()/make_request() may spin forever
138 [13065] nptl: Race condition in pthread barriers
139 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
140 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
142 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
143 [14912] libc: Rename non-installed bits/*.h headers
144 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
145 [15367] math: Let gcc use __builtin_isinf
146 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
147 [15421] math: lgamma wrongly sets signgam for ISO C
148 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
149 FE_INVALID with argument out of range
150 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
152 [15786] dynamic-link: ifunc resolver functions can smash function
154 [15918] math: Unnecessary check for equality in hypotf()
155 [16061] localedata: Review / update transliteration data
156 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
158 [16141] time: strptime %z offset restriction
159 [16171] math: drem should be alias of remainder
160 [16296] math: fegetround is pure?
161 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
162 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
164 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
165 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
167 [16422] math: [powerpc] math-float, math-double failing llrint tests with
168 "Exception "Inexact" set" on ppc32
169 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
170 [16517] math: Missing underflow exception from tanf/tan/tanl
171 [16519] math: Missing underflow exception from sinhf
172 [16520] math: Missing underflow exception from tanhf
173 [16521] math: Missing underflow exception from exp2
174 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
176 [16734] stdio: fopen calls mmap to allocate its buffer
177 [16961] math: nan function incorrect handling of bad sequences
178 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
179 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
180 [16985] locale: localedef: confusing error message when opening output
182 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
183 [17197] locale: Redundant shift character in iconv conversion output at
185 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
186 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
187 [17250] dynamic-link: static linking breaks nss loading
188 (getaddrinfo/getpwnam/etc...)
189 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
191 [17441] math: isnan() should use __builtin_isnan() in GCC
192 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
193 (related to lock elision)
194 [17787] manual: Exponent on page 324 of the PDF ends prematurely
195 [17886] time: strptime should be able to parse "Z" as a timezone with %z
196 [17887] time: strptime should be able to parse "+01:00" style timezones
197 [17905] libc: catopen() Multiple unbounded stack allocations
199 [18084] libc: backtrace (..., 0) dumps core on x86
200 [18086] libc: nice() sets errno to 0 on success
201 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
202 is too large (CVE-2015-8778)
203 [18251] dynamic-link: SONAME missing when audit modules provides path
204 [18265] libc: add attributes for wchar string and memory functions
205 [18370] math: csqrt missing underflows
206 [18421] libc: [hppa] read-only segment has dynamic relocations
207 [18472] libc: Obsolete syscall wrappers should be compat symbols
208 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
209 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
210 [18525] localedata: Remove locale timezone information
211 [18560] libc: [powerpc] spurious bits/ipc.h definitions
212 [18568] localedata: Update locale data to Unicode 8.0
213 [18589] locale: sort-test.sh fails at random
214 [18595] math: ctan, ctanh missing underflows
215 [18604] libc: assert macro-expands its argument
216 [18610] math: S390: fetestexcept() reports any exception if DXC-code
217 contains a vector instruction exception.
218 [18611] math: j1, jn missing errno setting on underflow
219 [18618] localedata: sync Chechen locale definitions with other *_RU
221 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
222 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
223 [18665] network: In send_dg, the recvfrom function is NOT always using the
224 buffer size of a newly created buffer (CVE-2015-7547)
225 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
227 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
229 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
230 [18699] math: tilegx cproj() for various complex infinities does not yield
232 [18724] libc: Harden put*ent functions against data injection
233 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
234 [18755] build: build errors with -DNDEBUG
235 [18757] stdio: fmemopen fails to set errno on failure
236 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
238 [18781] libc: openat64 lacks O_LARGEFILE
239 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
240 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
241 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
242 [18790] math: [ldbl-128ibm] tanhl inaccurate
243 [18795] libc: stpncpy fortification misses buffer lengths that are
245 [18796] build: build fails for --disable-mathvec
246 [18803] math: hypot missing underflows
247 [18820] stdio: fmemopen may leak memory on failure
248 [18823] math: csqrt spurious underflows
249 [18824] math: fma spurious underflows
250 [18825] math: pow missing underflows
251 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
252 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
253 [18870] build: sem_open.c fails to compile with missing symbol
255 [18872] stdio: Fix memory leak in printf_positional
256 [18873] libc: posix_fallocate overflow check ineffective
257 [18875] math: Excess precision leads incorrect libm
258 [18877] libc: arm: mmap offset regression
259 [18887] libc: memory corruption when using getmntent on blank lines
260 [18918] localedata: hu_HU: change time to HH:MM:SS format
261 [18921] libc: Regression: extraneous stat() and fstat() performed by
263 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
264 binaries (CVE-2015-8777)
265 [18951] math: tgamma missing underflows
266 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
268 [18953] localedata: lt_LT: change currency symbol to the euro
269 [18956] math: powf inaccuracy
270 [18961] math: [i386] exp missing underflows
271 [18966] math: [i386] exp10 missing underflows
272 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
273 [18969] build: multiple string test failures due to missing locale
275 [18970] libc: Reference of pthread_setcancelstate in libc.a
276 [18977] math: float / long double Bessel functions not in XSI POSIX
277 [18980] math: i386 libm functions return with excess range and precision
278 [18981] math: i386 scalb*, ldexp return with excess range and precision
279 [18982] stdio: va_list and vprintf
280 [18985] time: Passing out of range data to strftime() causes a segfault
282 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
283 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
284 [19012] locale: iconv_open leaks memory on error path
285 [19016] math: clog, clog10 inaccuracy
286 [19018] nptl: Mangle function pointers in tls_dtor_list
287 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
288 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
289 [19048] malloc: malloc: arena free list can become cyclic, increasing
291 [19049] math: [powerpc] erfc incorrect zero sign
292 [19050] math: [powerpc] log* incorrect zero sign
293 [19058] math: [x86_64] Link fail with -fopenmp and -flto
294 [19059] math: nexttoward overflow incorrect in non-default rounding modes
295 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
296 [19074] network: Data race in _res_hconf_reorder_addrs
297 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
298 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
299 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
301 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
303 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
304 [19086] manual: posix_fallocate64 documented argument order is wrong.
305 [19088] math: lround, llround missing exceptions close to overflow
307 [19094] math: lrint, llrint missing exceptions close to overflow threshold
308 [19095] math: dbl-64 lrint incorrect for 64-bit long
309 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
310 [19124] dynamic-link: ld.so failed to build with older assmebler
311 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
312 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
313 [19134] math: [powerpc32] lround, lroundf spurious exceptions
314 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
315 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
316 pthread_setaffinity_np
317 [19156] math: [ldbl-128] j0l spurious underflows
318 [19164] nptl: tst-getcpu fails with many possible CPUs
319 [19168] math: math/test-ildoubl and math/test-ldouble failure
320 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
321 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
323 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
324 (FE_NOMASK_ENV) do not clear SSE exceptions
325 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
326 _int_new_arena/reused_arena
327 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
328 [19201] math: dbl-64 remainder incorrect sign of zero result
329 [19205] math: bits/math-finite.h conditions do not match math.h and
331 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
332 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
333 for C99-based standards
334 [19212] libc: features.h not -Wundef clean
335 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
337 [19214] libc: Family and model identification for AMD CPU's are incorrect.
338 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
339 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
341 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
343 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
345 [19242] libc: strtol incorrect in Turkish locales
346 [19243] malloc: reused_arena can pick an arena on the free list, leading
347 to an assertion failure and reference count corruption
348 [19253] time: tzset() ineffective when temporary TZ did not include DST
350 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
351 [19270] math: [hppa] Shared libm missing __isnanl
352 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
353 MAP_HUGETLB and MAP_STACK defines
354 [19313] nptl: Wrong __cpu_mask for x32
355 [19347] libc: grantpt: try to force a specific gid even without pt_chown
356 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
357 [19350] math: [ldbl-128ibm] sinhl spurious overflows
358 [19351] math: [ldbl-128ibm] logl inaccurate near 1
359 [19363] time: x32: times() return value wrongly truncates/sign extends
361 [19367] dynamic-link: Improve branch prediction on Silvermont
362 [19369] network: Default domain name not reset by res_ninit when "search"
363 / "domain" entry is removed from resolv.conf
364 [19375] math: powerpc: incorrect results for POWER7 logb with negative
366 [19385] localedata: bg_BG: time separator should be colon, not comma
367 [19408] libc: linux personality syscall wrapper may erroneously return an
368 error on 32-bit architectures
369 [19415] libc: dladdr returns wrong names on hppa
370 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
371 IBM905, IBM907, and IBM909
372 [19439] math: Unix98 isinf and isnan functions conflict with C++11
373 [19443] build: build failures with -DDEBUG
374 [19451] build: Make check fails on test-double-vlen2
375 [19462] libc: Glibc failed to build with -Os
376 [19465] math: Wrong code with -Os
377 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
379 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
381 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
382 [19486] math: S390: Math tests fail with "Exception Inexact set".
383 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
384 [19550] libc: [mips] mmap negative offset handling inconsistent with other
386 [19590] math: Fail to build shared objects that use libmvec.so functions.
390 * The following bugs are resolved with this release:
392 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
393 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
394 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
395 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
396 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
397 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
398 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
399 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
400 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
401 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
402 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
403 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
404 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
405 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
406 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
407 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
408 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
409 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
410 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
411 18657, 18676, 18694, 18696, 18887.
413 * Cache information can be queried via sysconf() function on s390 e.g. with
414 _SC_LEVEL1_ICACHE_SIZE as argument.
416 * A buffer overflow in gethostbyname_r and related functions performing DNS
417 requests has been fixed. If the NSS functions were called with a
418 misaligned buffer, the buffer length change due to pointer alignment was
419 not taken into account. This could result in application crashes or,
420 potentially arbitrary code execution, using crafted, but syntactically
421 valid DNS responses. (CVE-2015-1781)
423 * The time zone file parser has been made more robust against crafted time
424 zone files, avoiding heap buffer overflows related to the processing of
425 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
426 large time zone data files. Overly long time zone specifiers in the TZ
427 variable no longer result in stack overflows and crashes.
429 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
430 for LD and GD on x86 and x86-64, has been implemented. You will need
431 binutils-2.24 or later to enable this optimization.
433 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
434 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
435 Hat). These updates cause user visible changes, such as the fix for bug
438 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
439 and getXXbyYY NSS calls for the same database, causing a denial-of-service
440 condition in some applications.
442 * Added vector math library named libmvec with the following vectorized x86_64
443 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
445 The library can be disabled with --disable-mathvec. Use of the functions is
446 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
447 Shared library libmvec.so is linked in as needed when using -lm (no need to
448 specify -lmvec explicitly for not static builds).
449 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
451 * A new fmemopen implementation has been added with the goal of POSIX
452 compliance. The new implementation fixes the following long-standing
453 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
454 old implementation is still present for use be by existing binaries.
456 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
457 releases. It has been fixed to match 2.19 and older, but binaries built
458 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
460 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
461 Contributed by Roland McGrath (Google).
463 * The header <regexp.h> is deprecated, and will be removed in a future
464 release. Use of this header will trigger a deprecation warning.
465 Application developers should update their code to use <regex.h> instead.
467 This header was formerly part of SUS, but was deprecated in 1994 and
468 removed from the standard in 2001. Also, the glibc implementation
469 leaks memory. See BZ#18681 for more details.
473 * The following bugs are resolved with this release:
475 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
476 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
477 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
478 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
479 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
480 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
481 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
482 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
483 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
484 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
487 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
488 too little memory for the to-be-scanned arguments and overflow the
489 allocated buffer. The implementation now correctly computes the required
490 buffer size when using malloc, and switches to malloc from alloca as
493 * A new semaphore algorithm has been implemented in generic C code for all
494 machines. Previous custom assembly implementations of semaphore were
495 difficult to reason about or ensure that they were safe. The new version
496 of semaphore supports machines with 64-bit or 32-bit atomic operations.
497 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
498 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
500 * Port to Altera Nios II has been contributed by Mentor Graphics.
502 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
503 implementations for powerpc64/powerpc64le.
504 Implemented by Adhemerval Zanella (IBM).
506 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
507 and powerpc64le. This may improve lock scaling of existing programs on
508 HTM capable systems. The lock elision code is only enabled with
509 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
510 powerpc will issue a transaction abort on every syscall to avoid side
511 effects being visible outside transactions.
513 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
514 AArch64. Contributed by ARM Ltd.
516 * i386 memcpy functions optimized with SSE2 unaligned load/store.
518 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
519 under certain input conditions resulting in the execution of a shell for
520 command substitution when the application did not request it. The
521 implementation now checks WRDE_NOCMD immediately before executing the
522 shell and returns the error WRDE_CMDSUB as expected.
524 * CVE-2012-3406 printf-style functions could run into a stack overflow when
525 processing format strings with a large number of format specifiers.
527 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
528 infinite loop if the DNS response contained a PTR record of an unexpected
531 * The minimum GCC version that can be used to build this version of the GNU
532 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
533 still be used to compile programs using the GNU C Library.
535 * The GNU C Library is now built with -Werror by default. This can be
536 disabled by configuring with --disable-werror.
538 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
540 * The obsolete sigvec function has been removed. This was the original
541 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
542 programs have been using instead for about 25 years. Of course, ABI
543 compatibility for old binaries using sigvec remains intact.
545 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
546 with newer versions of bison.
548 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
549 The original MIPS o32 hard-float ABI requires an FPU where double-precision
550 registers overlay two consecutive single-precision registers. MIPS32R2
551 introduced a new FPU mode (FR=1) where double-precision registers extend the
552 corresponding single-precision registers which is incompatible with the
553 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
554 require the use of FR=1 making a transition necessary. New o32 ABI
555 extensions enable users to migrate over time from the original o32 ABI
556 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
557 tracks the ABI of any loaded object and verifies that new objects are
558 compatible. Mode transitions will also be requested as required and
559 unsupportable objects will be rejected. The ABI checks include both soft and
560 hard float ABIs for o32, n32 and n64.
562 GCC 5 with GNU binutils 2.25 onwards:
563 It is strongly recommended that all o32 system libraries are built using the
564 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
565 with the original and all new o32 ABI extensions. Configure a MIPS GCC
566 compiler using --with-fp-32=xx to set this by default.
570 * The following bugs are resolved with this release:
572 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
573 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
574 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
575 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
576 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
577 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
578 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
579 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
580 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
581 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
582 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
583 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
584 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
585 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
586 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
588 * Reverted change of ABI data structures for s390 and s390x:
589 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
590 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
591 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
592 are preserved pointing straight to the same implementation as the old ones.
593 Given that, new callers will simply provide a too-big buffer to these
594 functions. Any applications/libraries out there that embed jmp_buf or
595 ucontext_t in an ABI-relevant data structure that have already been rebuilt
596 against 2.19 headers will have to rebuilt again. This is necessary in any
597 case to revert the breakage in their ABI caused by the glibc change.
599 * Support for file description locks is added to systems running the
600 Linux kernel. The standard file locking interfaces are extended to
601 operate on file descriptions, not file descriptors, via the use of
602 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
603 are associated with an open file instead of a process.
605 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
607 * The minimum Linux kernel version that this version of the GNU C Library
608 can be used with is 2.6.32.
610 * Running the testsuite no longer terminates as soon as a test fails.
611 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
612 with PASS or FAIL lines for individual tests. A summary of the results is
613 printed, including a list of failing lists, and "make check" exits with
614 error status if there were any unexpected failures. "make check
615 stop-on-test-failure=y" may be used to keep the old behavior.
617 * The am33 port, which had not worked for several years, has been removed
620 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
621 supported; they now act the same as _DEFAULT_SOURCE (but generate a
622 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
623 conflicted with POSIX (support for which was removed in 2.19), the
624 interfaces those macros enabled remain available when compiling with
625 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
628 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
630 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
631 This may improve lock scaling of existing programs on TX capable systems.
632 The lock elision code is only built with --enable-lock-elision=yes and
633 then requires a GCC version supporting the TX builtins. With lock elision
634 default mutexes are elided via __builtin_tbegin, if the cpu supports
635 transactions. By default lock elision is not enabled and the elision code
638 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
639 copy the path argument. This allowed programs to cause posix_spawn to
640 deference a dangling pointer, or use an unexpected pathname argument if
641 the string was modified after the posix_spawn_file_actions_addopen
644 * All supported architectures now use the main glibc sysdeps directory
645 instead of some being in a separate "ports" directory (which was
646 distributed separately before glibc 2.17).
648 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
649 On configurations that support it (all Linux configurations), it's now
650 used regardless of the --enable-add-ons switch to configure. It is no
651 longer possible to build such configurations without pthreads support.
653 * Locale names, including those obtained from environment variables (LANG
654 and the LC_* variables), are more tightly checked for proper syntax.
655 setlocale will now fail (with EINVAL) for locale names that are overly
656 long, contain slashes without starting with a slash, or contain ".." path
657 components. (CVE-2014-0475) Previously, some valid locale names were
658 silently replaced with the "C" locale when running in AT_SECURE mode
659 (e.g., in a SUID program). This is no longer necessary because of the
662 * On x86-64, the dynamic linker's lazy-binding support is now compatible
663 with application code using Intel MPX instructions. (With all previous
664 versions, the MPX register state could be clobbered when making calls
665 into or out of a shared library.) Note that while the new dynamic
666 linker is compatible with all known x86 hardware whether or not it
667 supports Intel MPX, some x86 instruction-set emulators might fail to
668 handle the new instruction encodings. This is known to affect Valgrind
669 versions up through 3.9 (but will be fixed in the forthcoming 3.10
670 release), and might affect other tools that do instruction emulation.
672 * Support for loadable gconv transliteration modules has been removed.
673 The support for transliteration modules has been non-functional for
674 over a decade, and the removal is prompted by security defects. The
675 normal gconv conversion modules are still supported. Transliteration
676 with //TRANSLIT is still possible, and the //IGNORE specifier
677 continues to be supported. (CVE-2014-5119)
679 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
680 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
681 resulting a denial-of-service security vulnerability in applications which
682 use functions related to iconv. (CVE-2014-6040)
686 * The following bugs are resolved with this release:
688 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
689 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
690 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
691 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
692 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
693 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
694 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
695 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
696 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
697 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
698 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
699 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
700 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
701 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
702 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
703 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
704 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
705 16431, 16453, 16474, 16506, 16510, 16529
707 * Slovenian translations for glibc messages have been contributed by the
708 Translation Project's Slovenian team of translators.
710 * The public headers no longer use __unused nor __block. This change is to
711 support compiling programs that are derived from BSD sources and use
712 __unused internally, and to support compiling with Clang's -fblock
713 extension which uses __block.
715 * CVE-2012-4412 The strcoll implementation caches indices and rules for
716 large collation sequences to optimize multiple passes. This cache
717 computation may overflow for large collation sequences and may cause a
718 stack or buffer overflow. This is now fixed to use a slower algorithm
719 which does not use a cache if there is an integer overflow.
721 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
722 rules for large collation sequences to optimize multiple passes and falls
723 back to alloca if malloc fails, resulting in a possible stack overflow.
724 The implementation now falls back to an uncached collation sequence lookup
727 * CVE-2013-4788 The pointer guard used for pointer mangling was not
728 initialized for static applications resulting in the security feature
729 being disabled. The pointer guard is now correctly initialized to a
730 random value for static applications. Existing static applications need
731 to be recompiled to take advantage of the fix (bug 15754).
733 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
734 to the d_name member of struct dirent, or omit the terminating NUL
735 character. (Bugzilla #14699).
737 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
738 aligned_alloc functions could allocate too few bytes or corrupt the
739 heap when passed very large allocation size values (Bugzilla #15855,
742 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
743 for AF_INET6 has been fixed (Bugzilla #16072).
745 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
746 pap_CW, quz_PE, the_NP.
748 * Substantially revised locales: gd_GB, ht_HT
750 * The LC_ADDRESS field was updated to support country_car for almost all
753 * ISO 1427 definitions were updated.
755 * ISO 3166 definitions were updated.
757 * The localedef utility now supports --big-endian and --little-endian
758 command-line options to generate locales for a different system from that
759 for which the C library was built.
761 * Binary locale files now only depend on the endianness of the system for
762 which they are generated and not on other properties of that system. As a
763 consequence, binary files generated with new localedef may be incompatible
764 with old versions of the GNU C Library, and binary files generated with
765 old localedef may be incompatible with this version of the GNU C Library,
766 in the following circumstances:
768 + Locale files may be incompatible on m68k systems.
770 + Locale archive files (but not separate files for individual locales) may
771 be incompatible on systems where plain "char" is signed.
773 * The configure option --disable-versioning has been removed. Builds with
774 --disable-versioning had not worked for several years.
776 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
777 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
779 * SystemTap probes for malloc have been introduced.
781 * SystemTap probes for slow multiple precision fallback paths of
782 transcendental functions have been introduced.
784 * Support for powerpc64le has been added.
786 * The soft-float powerpc port now supports e500 processors.
788 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
790 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
791 set of header declarations that are enabled by default, even when other
792 feature test macros or compiler options such as -std=c99 would otherwise
793 disable some of those declarations.
795 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
796 conflict with POSIX. The libbsd-compat library (which was a dummy library
797 that did nothing) has also been removed.
799 * Preliminary documentation about Multi-Thread, Async-Signal and
800 Async-Cancel Safety has been added.
802 * Change of ABI data structures for s390 and s390x:
803 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
804 allow for future hardware extensions. All library functions that accept or
805 return these structures were versioned in order to provide backwards
806 compatibility with existing code. However, not all cases can be handled
807 with interface versioning. If an application embeds either structure into
808 another structure and that structure is passed to another compilation unit
809 which expects the newer larger-sized object then any access to the new
810 fields will result in undefined behaviour. Similarly any access to fields
811 that were moved by the enlarging of the structures will cause undefined
812 behaviour. To fix the undefined behaviour all objects that are part of the
813 final in-memory image must agree on the size of structures, and this may
814 require recompilation.
818 * The following bugs are resolved with this release:
820 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
821 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
822 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
823 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
824 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
825 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
826 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
827 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
828 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
829 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
830 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
831 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
832 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
835 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
836 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
837 Distributions can re-enable building and using pt_chown via the new configure
838 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
839 considerable security risks and should only be used if the distribution
840 understands and accepts the risks.
842 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
845 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
846 fixed (Bugzilla #15330).
848 * Add support for calling C++11 thread_local object destructors on thread
849 and program exit. This needs compiler support for offloading C++11
850 destructor calls to glibc.
852 * Improved worst case performance of libm functions with double inputs and
855 * Support for priority inherited mutexes in pthread condition variables on
856 non-x86 architectures.
858 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
860 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
862 * Optimized string functions for ARM. Implemented by Will Newton and
865 * Optimized libm functions for SPARC. Implemented by David S. Miller.
867 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
870 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
871 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
873 * Added a benchmark framework to track performance of functions in glibc.
875 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
876 It is based on draft TS 18661 and currently enabled as a GNU extension.
878 * On Linux, the clock function now uses the clock_gettime system call
879 for improved precision, rather than old times system call.
881 * Added support for version-3 tz format files. This is needed when using
882 the tz database release 2013e or later, and affects a few unusual cases --
883 currently only TZ='America/Godthab' for time stamps after 2037.
885 * Added new API functions pthread_getattr_default_np and
886 pthread_setattr_default_np to get and set the default pthread
887 attributes of a process.
889 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
890 This may improve lock scaling of existing programs on TSX capable systems.
891 When the --enable-lock-elision=yes parameter is specified at configure
892 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
895 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
896 availability). Implemented by Ryan S. Arnold.
898 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
902 * The following bugs are resolved with this release:
904 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
905 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
906 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
907 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
908 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
909 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
910 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
911 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
912 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
913 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
914 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
915 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
916 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
917 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
918 14879, 14889, 14893, 14898, 14914.
920 * Optimization of memcpy for MIPS.
922 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
923 EMFILE has been fixed (Bugzilla #14889).
925 * The add-on ports collection is now distributed in the "ports" subdirectory
926 of the main GNU C Library distribution, rather than separately.
928 * Port to ARM AArch64 contributed by Linaro.
930 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
931 Optimized versions of memcpy, memset, and memcmp added for System z10 and
933 Implemented by Andreas Krebbel.
935 * The new function secure_getenv allows secure access to the environment,
936 returning NULL if running in a SUID/SGID process. This function replaces
937 the internal function __secure_getenv.
939 * SystemTap static probes have been added into the dynamic linker.
940 Implemented by Gary Benson.
942 * Optimizations of string functions strstr, strcasestr and memmem.
943 Implemented by Maxim Kuvyrkov.
945 * The minimum Linux kernel version that this version of the GNU C Library
946 can be used with is 2.6.16.
948 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
949 powerpc POWER7. Implemented by Will Schmidt.
951 * New configure option --disable-nscd builds the C library such that it
952 never attempts to contact the Name Service Caching Daemon (nscd).
953 New configure option --disable-build-nscd avoids building nscd itself;
954 this is the default if --disable-nscd is used.
956 * Improved support for cross-compilation, including cross-testing and
957 bootstrap builds without a previously built glibc.
959 * Several testsuite tests are now able to test multiple IFUNC variants of an
960 interface, rather than just testing the one that would be chooen by
963 * New configure options --with-bugurl and --with-pkgversion, for
964 distributors to use to embed their bug-reporting and package version
965 information in --help and --version output.
967 * The ttyname and ttyname_r functions on Linux now fall back to searching for
968 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
969 allows creation of chroots without the procfs mounted on /proc.
971 * The `crypt' function now fails if passed salt bytes that violate the
972 specification for those values. On Linux, the `crypt' function will
973 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
974 enabled, and fail on encrypted strings using the MD5 or DES algorithm
975 when the mode is enabled.
977 * The `clock_*' suite of functions (declared in <time.h>) is now available
978 directly in the main C library. Previously it was necessary to link with
979 -lrt to use these functions. This change has the effect that a
980 single-threaded program that uses a function such as `clock_gettime' (and
981 is not linked with -lrt) will no longer implicitly load the pthreads
982 library at runtime and so will not suffer the overheads associated with
983 multi-thread support in other code such as the C++ runtime library.
985 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
990 * The following bugs are resolved with this release:
992 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
993 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
994 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
995 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
996 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
997 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
998 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
999 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
1000 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
1001 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
1002 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
1003 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
1004 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
1005 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
1006 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
1007 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
1008 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
1009 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
1010 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
1011 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
1012 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1013 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1016 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1017 configuring glibc with:
1018 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1019 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1020 Implemented by H.J. Lu.
1024 + define static_assert
1026 + do not declare gets
1028 + declare at_quick_exit and quick_exit also for ISO C11
1030 + aligned_alloc. NB: The code is deliberately allows the size parameter
1031 to not be a multiple of the alignment. This is a moronic requirement
1032 in the standard but it is only a requirement on the caller, not the
1035 + timespec_get added
1037 + uchar.h support added
1039 + CMPLX, CMPLXF, CMPLXL added
1041 Implemented by Ulrich Drepper.
1043 * Support for the IA-64 has been moved to ports.
1045 * Remove support for anything but ELF binary format
1047 * Checking versions of poll, ppoll added.
1048 Implemented by Ulrich Drepper.
1050 * More generic and 64-bit performance optimizations to math functions.
1051 Implemented by Ulrich Drepper.
1053 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1054 headers and functions available at compile time as they were before
1055 version 2.14. This option will be removed at some time in the future
1056 after the TI-RPC library becomes fully sufficient for the needs of
1057 existing applications.
1059 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1060 Note that glibc is not expected to work with any Linux kernel version
1063 * New header <sys/auxv.h> and function getauxval allowing easy access to
1064 the AT_* key-value pairs passed from the Linux kernel. The header also
1065 defines the HWCAP_* bits associated with the AT_HWCAP key.
1067 * New locales: mag_IN
1069 * New configure option --enable-systemtap builds SystemTap static probes
1070 into libc for setjmp and longjmp and into libpthread for various operations.
1071 So far the setjmp/longjmp probes and some of the libpthread probes are
1072 provided only for i*86 and x86_64.
1073 Implemented by Roland McGrath and Rayson Ho.
1075 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1077 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1080 * More optimized functions for SPARC. Implemented by David S. Miller.
1082 * Improved support for cross-compilation, especially bootstrap builds
1083 without a previously built glibc.
1085 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1086 Chris Metcalf from Tilera.
1088 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1089 now supported for ARM processors.
1091 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1092 as the name of the dynamic linker, to distinguish it from the
1093 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1095 * Support for CRIS has been removed from ports.
1097 * A new class of installed header has been documented for low-level
1098 platform-specific functionality. PowerPC added the first instance with a
1099 function to provide time base register access. Contributed by Tulio
1100 Magno Quites Machado Filho.
1102 * ix86 configurations now install header files that are consistent with
1103 what x86-64 configurations install. These same header files can be used
1104 for -m32, -m64, or -mx32 builds.
1105 Contributed by H.J. Lu.
1107 * Math library bug fixes. A thorough audit of all open math library bugs was
1108 conducted by Joseph Myers. Significant progress was made on many math
1109 library bugs resulting in more accurate exceptions and function results.
1110 Many thanks to all those that contributed including Andreas Jaeger for his
1111 patch review and work on the x87 trigonometric instruction issues.
1113 * Timezone data is no longer installed. Timezone-related binaries and scripts
1114 will continue to be installed. Users should obtain their timezone data from
1115 their distribution provider or from the tzdata package at
1116 <ftp://munnari.oz.au/pub/>.
1120 * The following bugs are resolved with this release:
1122 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1123 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1124 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1125 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1126 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1127 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1128 13484, 13506, 13515, 13523, 13524, 13538, 13540
1130 * New program pldd to list loaded object of a process
1131 Implemented by Ulrich Drepper.
1133 * Add nss_db support back to glibc. No more dependency on Berkeley db
1134 and support for initgroups lookups.
1135 Implemented by Ulrich Drepper.
1137 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
1138 Contributed by HJ Lu.
1140 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
1141 Contributed by HJ Lu.
1143 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
1144 on x86-32 and x86-64.
1145 Contributed by Liubov Dmitrieva.
1147 * Optimized strchr and strrchr for SSE on x86-32.
1148 Contributed by Liubov Dmitrieva.
1150 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
1151 for x86-64 and x86-32.
1152 Contributed by Liubov Dmitrieva.
1154 * New interfaces: scandirat, scandirat64
1155 Implemented by Ulrich Drepper.
1157 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
1158 Implemented by Ulrich Drepper.
1160 * nscd now also caches the netgroup database.
1161 Implemented by Ulrich Drepper.
1163 * Integrate libm with gcc's -ffinite-math-only option.
1164 Implemented by Ulrich Drepper.
1166 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
1167 to math functions. Implemented by Ulrich Drepper.
1169 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
1170 Implemented by Ulrich Drepper.
1172 * New Linux interfaces: process_vm_readv, process_vm_writev
1174 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
1175 Implemented by Ulrich Drepper.
1177 * Optimized nearbyint and strcasecmp for PPC.
1178 Implemented by Adhemerval Zanella.
1180 * New locales: bho_IN, unm_US, es_CU, ta_LK
1184 * The following bugs are resolved with this release:
1186 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
1187 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
1188 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
1189 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
1190 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
1191 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
1192 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
1193 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
1194 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
1195 12795, 12811, 12813, 12814, 12841
1197 * The RPC implementation in libc is obsoleted. Old programs keep working
1198 but new programs cannot be linked with the routines in libc anymore.
1199 Programs in need of RPC functionality must be linked against TI-RPC.
1200 The TI-RPC implementation is IPv6 enabled and there are other benefits.
1202 Visible changes of this change include (obviously) the inability to link
1203 programs using RPC functions without referencing the TI-RPC library and the
1204 removal of the RPC headers from the glibc headers.
1205 Implemented by Ulrich Drepper.
1207 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
1208 syncfs, setns, sendmmsg
1210 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
1211 yue_HK, lij_IT, mhr_RU
1213 * New encodings: CP770, CP771, CP772, CP773, CP774
1215 * New program sotruss to trace calls through PLTs
1216 Implemented by Ulrich Drepper.
1218 * The malloc hook implementation is marked deprecated and will be removed
1219 from the default implementation in the next version. The design never
1220 worked ever since the introduction of threads. Even programs which do
1221 not create threads themselves can use multiple threads created internally.
1225 * The following bugs are resolved with this release:
1227 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
1228 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
1229 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
1230 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
1233 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
1235 * POWER7 optimizations: memset, memcmp, strncmp
1237 * New optimized string functions for x86-64: strnlen (SSE2),
1238 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
1239 Implemented by Ulrich Drepper.
1243 * The following bugs are resolved with this release:
1245 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
1246 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
1247 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
1248 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
1249 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
1250 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
1251 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
1252 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
1254 * New interfaces: pthread_getname_np, pthread_setname_np
1256 * New Linux interface: recvmmsg
1258 * STT_GNU_IFUNC implemented for Sparc by David Miller.
1260 * The dynamic linker now recognizes supported ABI versions from the
1261 EI_ABIVERSION field in the ELF header.
1262 Implemented by Ulrich Drepper.
1264 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
1265 will not be used to fill in password fields in the passwd.byname replies.
1266 Instead it is used to synthesize the shadow.byname table, should it be
1267 missing. This is a useful mode in some installations involving Solaris.
1268 Implemented by Ulrich Drepper.
1270 * New locales: kok_IN, sq_MK, cv_RU
1274 * The following bugs are resolved with this release:
1276 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
1277 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
1278 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
1279 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
1280 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
1281 10789, 10817, 10823, 10840, 10847
1283 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
1285 Implemented by Ulrich Drepper.
1287 * Checking version of longjmp added that fails if an uninitialized stack
1288 frame would be created. Implemented by Ulrich Drepper.
1290 * STT_GNU_IFUNC is now supported in static executables.
1291 Implemented by H.J. Lu.
1293 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
1295 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
1296 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
1297 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
1298 Contributed by H.J. Lu.
1300 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
1301 Implemented by Ulrich Drepper.
1303 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
1305 Contributed by H.J. Lu.
1307 * Support for fma instruction in AVX on x86-64.
1308 Implemented by H.J. Lu and Ulrich Drepper.
1310 * AVX support in x86-64 auditing support in ld.so.
1311 Implemented by H.J. Lu.
1313 * STB_GNU_UNIQUE support added.
1314 Implemented by Ulrich Drepper.
1316 * Implement second fallback mode for optimized DNS lookup for even more
1317 broken environments. If two requests from the same port are not
1318 handled correctly close the socket and open a new one before sending
1319 the second request. The 'single-request-reopen' option in /etc/resolv.conf
1320 can be used to select this mode right away, instead of rediscovering the
1321 necessity is every process again.
1322 Implemented by Ulrich Drepper.
1324 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
1325 Implemented by Adam Tkac.
1327 * Optimized iconv conversions for S390x.
1328 Implemented by Andreas Krebbel.
1330 * Using condvars with PI mutexes is now more efficient due to kernel
1331 support for requeueing to PI futexes. NPTL support added for x86-64.
1332 Implemented by Ulrich Drepper.
1334 * New locales: ps_AF, my_MM
1338 * The following bugs are resolved with this release:
1340 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1341 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1342 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1343 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1344 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1346 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1347 Implemented by Ulrich Drepper.
1349 * New Linux interfaces: accept4, fallocate, fallocate64.
1350 Implemented by Ulrich Drepper.
1352 * Correct declarations of string function when used in C++ code. This
1353 could lead to compile errors for invalid C++ code.
1355 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1358 * New POSIX 2008 interface: psiginfo
1359 Implemented by Ulrich Drepper.
1361 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1362 Implemented by Ulrich Drepper.
1364 * Support for selecting between multiple function definitions at runtime
1365 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1367 * The libcrypt library can now use the hash function implementations in
1368 NSS. Implemented by Ulrich Drepper.
1370 * The malloc implementation can be compiled to be less memory efficient
1371 but higher performing in multi-threaded programs.
1372 Implemented by Ulrich Drepper.
1374 * New locales: nan_TW@latin, ks_IN
1376 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1377 Implemented by Ulrich Drepper.
1379 * Extended printf hook support. It is possible to use user-defined types
1380 and extend existing format specifiers.
1381 Implemented by Ulrich Drepper.
1383 * Handling for group shadow files has been added.
1384 Implemented by Ulrich Drepper.
1386 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1387 servers (the case, e.g., for some people using the built-in DNS
1388 server in ADSL modems/routers). There is a once-per-process timeout
1389 in case of a broken server. To avoid it, users can run nscd or put
1390 'options single-request' in /etc/resolv.conf.
1391 Implemented by Ulrich Drepper.
1395 * The following bugs are resolved with this release:
1397 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1398 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1399 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1400 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1401 6968, 6974, 6980, 6995, 7008, 7009, 7029
1403 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1404 up at the same time. Implemented by Ulrich Drepper.
1406 * TLS descriptors for LD and GD on x86 and x86-64.
1407 Implemented by Alexandre Oliva.
1409 * getaddrinfo now handles DCCP and UDPlite.
1410 Implemented by Ulrich Drepper.
1412 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1413 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1414 Implemented by Ulrich Drepper.
1416 * New implementation of memmem, strstr, and strcasestr which is O(n).
1417 Implemented by Eric Blake.
1419 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1421 * Implement "e" option for popen to open file descriptor with the
1422 close-on-exec flag set. Implemented by Ulrich Drepper.
1424 * Implement "b" mode for fmemopen. In this mode writes writes don't
1425 implicitly add a NUL byte and seeks from the end of the buffer really
1426 use the buffer end, not the string length as the basis.
1427 Implemented by Ulrich Drepper.
1429 * Many functions, exported and internal, now atomically set the close-on-exec
1430 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1432 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1434 Implemented by Pravin Satpute.
1436 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1440 * The following bugs are resolved with this release:
1442 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1443 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1444 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1445 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1446 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1447 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1448 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1450 * New locales: bo_CN, bo_IN, shs_CA.
1452 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1454 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1455 Implemented by Pravin Satpute.
1457 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1459 * nscd caches now all timeouts for DNS entries
1460 Implemented by Ulrich Drepper.
1462 * nscd is more efficient and wakes up less often.
1463 Implemented by Ulrich Drepper.
1465 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1466 vdprintf, and obstack_vprintf.
1467 Implemented by Jakub Jelinek.
1469 * Faster memset for x86-64.
1470 Implemented by Harsha Jagasia and H.J. Lu.
1472 * Faster memcpy on x86.
1473 Implemented by Ulrich Drepper.
1475 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1476 Implemented by Ulrich Drepper.
1478 * Faster sqrt and sqrtf implemention for some PPC variants.
1479 Implemented by Steven Munroe.
1483 * The following bugs are resolved with this release:
1485 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1486 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1487 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1488 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1489 5071, 5103, 5104, 5112, 5113, 5184, 5186
1491 * More checking functions: fread, fread_unlocked, open*, mq_open.
1492 Implemented by Jakub Jelinek and Ulrich Drepper.
1494 * Extend fortification to C++. Implemented by Jakub Jelinek.
1496 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1497 by not recognizing 'a' as a modifier when those specs are requested.
1498 Implemented by Jakub Jelinek.
1500 * PPC optimizations to math and string functions.
1501 Implemented by Steven Munroe.
1503 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1504 options to be passed. Implemented by Ulrich Drepper.
1506 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1508 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1509 Implemented by Ulrich Drepper.
1511 * Handle private futexes in the NPTL implementation.
1512 Implemented by Jakub Jelinek and Ulrich Drepper.
1514 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1515 Implemented by Roland McGrath and Ulrich Drepper.
1517 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1519 * SHA-256 and SHA-512 based password encryption.
1520 Implemented by Ulrich Drepper.
1522 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1523 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1526 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1527 Implemented by Ulrich Drepper.
1531 * The following bugs are resolved with this release:
1533 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1534 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1535 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1536 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1537 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1538 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1539 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1542 * New Linux interfaces: epoll_pwait, sched_getcpu.
1544 * New generic interfaces: strerror_l.
1546 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1550 * The following bugs are resolved with this release:
1552 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1553 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1554 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1555 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1556 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1557 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1558 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1559 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1560 3225, 3251, 3252, 3253, 3273
1562 * For Linux, the sorting of addresses returned by getaddrinfo now also
1563 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1564 Implemented by Ulrich Drepper.
1566 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1567 Implemented by Ulrich Drepper.
1569 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1571 * New iconv module for MIK. Contributed by Alexander Shopov.
1573 * For sites with broken group and/or passwd database, the auto-propagate
1574 option of nscd can prevent creating ID lookup entries from the results
1575 of a name lookup and vice versa. This usually is no problem but some
1576 site might have problems with the default behavior.
1577 Implemented by Ulrich Drepper.
1579 * Iterating over entire database in NIS can be slow. With the
1580 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1581 to trade time for memory. The entire database will be read at once.
1582 Implemented by Ulrich Drepper.
1584 * The interfaces introduced in RFC 3542 have been implemented by
1587 * Support for the new ELF hash table format was added by Ulrich Drepper.
1589 * Support for priority inheritance mutexes added by Jakub Jelinek and
1592 * Support for priority protected mutexes added by Jakub Jelinek.
1594 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1595 or_IN, csb_PL, fy_NL, sr_ME.
1599 * More overflow detection functions.
1601 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1602 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1604 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1605 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1606 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1607 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1608 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1609 by Masahide Washizawa.
1611 * It is now possible to install audit libraries for the dynamic linker using
1612 LD_AUDIT. Implemented by Ulrich Drepper.
1614 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1615 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1616 For a libc and libpthread that works well on Linux 2.4 kernels, we
1617 recommend using the stable 2.3 branch.
1619 * The new function open_wmemstream acts like open_memstream,
1620 but uses a wchar_t wide character buffer.
1622 * The new function ppoll is an improved version of poll, similar to pselect.
1624 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1625 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1626 renameat, unlinkat, linkat, symlinkat, readlinkat.
1628 * New Linux kernel system calls: unshare,
1629 inotify_init, inotify_add_watch, inotify_rm_watch.
1631 * The euidaccess function is now also known by the alias eaccess,
1632 for compatibility with some other systems.
1634 * Timezone data updated to 2006b version.
1638 * The following bugs are resolved with this release:
1640 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1641 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1642 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1643 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1644 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1645 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1647 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1649 * As of this release, GCC 4 can be used to compile the C Library.
1651 * Timezone data updated to 2005m version.
1655 * The following bugs are resolved with this release:
1657 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1658 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1659 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1660 777, 787, 821, 822, 823, 825
1662 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1666 * Support for RFC 3678. Real implementations exist only for Linux so far.
1667 Implemented by Ulrich Drepper.
1669 * nscd can now cache entries persistently. Expiring entries are reloaded.
1670 For speedups the cache can be shared in memory with client processes.
1671 Implemented by Ulrich Drepper.
1673 * nscd can now perform SELinux checks.
1674 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1676 * getaddrinfo queries are now cached. Canonical name lookup is performed
1678 Implemented by Ulrich Drepper.
1680 * The nothrow function attribute is used when headers are used by gcc when
1681 compiling C code. This can avoid significant amounts of exception
1684 * The malloc functions perform more error checking and are stricter when
1685 it comes to reacting on errors. The default action is to terminate
1686 the process after showing an error message. Implemented by Ulrich Drepper.
1688 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1689 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1691 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1692 namespaces using the new function dlmopen(). This feature is of course,
1693 like most other dynamic loading functionality, not available in statically
1694 linked applications. Implemented by Ulrich Drepper.
1696 * Low-overhead boundary checking variants of string and some stdio functions
1697 were added. These are to be used in conjunction with a gcc patch by
1698 Jakub Jelinek which adds calls to these functions if possible.
1699 Implemented by Jakub Jelinek and Ulrich Drepper.
1701 * Old code for several operating systems and machine architectures that
1702 have not been in working condition in a long time have been removed from
1703 the main source tree maintained by the GNU C Library's maintainers.
1704 These files are now reside in the separate `ports' source module
1705 that is usable as an add-on when building the library.
1709 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1710 interrogate the dynamic linker, compatible with the Solaris interface.
1712 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1713 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1715 * getifaddrs now uses the netlink interface on Linux to get its information.
1716 Implemented by Thorsten Kukuk.
1718 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1719 Implemented by Ulrich Drepper.
1721 * support for non-executable stacks on x86 has been added. Changes mostly
1724 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1727 * getaddrinfo now performs destination address selection according to
1732 * Thread-safe interfaces for many functions that access locale data
1733 were added in version 2.3, but these features were omitted from NEWS.
1734 Many functions have variants with an `_l' suffix that take a `locale_t'
1735 object as a parameter rather than consulting the current locale.
1736 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1737 create and maintain `locale_t' objects. Additionally, the new function
1738 `uselocale' sets "the current locale" (as used by functions not so
1739 parameterized) set for an individual thread. These features were added
1740 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1742 * The functions getresuid, getresgid, setresuid, and setresgid, which
1743 have long been available on Linux, are now declared in <unistd.h>
1744 and are now also available on the Hurd.
1746 * ELF thread-local storage support (TLS) now works on x86-64.
1748 * The new dynamic string token $LIB is expanded in shared library names.
1749 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1751 * Aldy Hernandez contributed complete software floating point support for
1752 PowerPC machines with no FPU.
1754 * fexecve is implemented on Linux.
1756 * The `btowc' function should work at least twice as fast due to
1757 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1759 * With approriate thread add-ons cancelable functions are now implemented
1760 in libc.so as well. No need to call the function in libpthread. This
1761 change allowed to finally disable the incorrect and expensive handling
1762 of weak definition in ld.so.
1764 * Yet more PLT entries in libc.so have been removed. We finally arrived
1765 at the bare minimum. Startup times improved appropriately.
1767 * Support for the new Linux/x86 system call interface was added. The
1768 AT_SYSINFO auxiliary vector entry is recognized and handled.
1772 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1775 * iconv (the program and the interface) now accepts empty names (excluding
1776 options like //TRANSLIT) to mean "use charset of current locale".
1778 * localedef can now transliterate characters in strings which are not in
1779 the provided charmap. The information from the input locale is used.
1781 * Prelinking support was added for ELF targets. This requires additional
1782 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1784 * Read-only stdio streams now use mmap to speed up operation by eliminating
1785 copying and buffer underflows. To use add 'm' to the mode string of
1786 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1788 * The malloc functions were completely rewritten by Wolfram Gloger based
1789 on Doug Lea's malloc-2.7.0.c.
1791 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1792 implementation of regex.
1794 * Bruno Haible upgraded the iconv and locale implementation to support
1797 * Contents of the LC_* and LANG environment variables in the CEN style are
1798 not recognized anymore. It never was used. Change by Ulrich Drepper.
1800 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1801 thread-local storage (TLS) ABI on some platforms.
1802 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1804 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1805 EUC-JISX0213, and TSCII.
1807 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1808 BSD-compatible interface for getting all network interface addresses.
1809 Implementation for IPv4 by Roland McGrath.
1811 * Loading of locale data is faster due to the introduction of a locale
1812 archive. Implemented by Roland McGrath and Ulrich Drepper.
1814 * Startup times are significantly reduced by not using exported functions
1815 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1818 * Steven Munroe contributed a port to PowerPC64/Linux.
1822 * The Hurd now uses the GNU libio implementation of stdio rather than the
1823 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1825 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1826 with the same behavior as the Linux system call of the same name.
1830 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1831 128-bit long double format.
1833 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1834 IBM1161, and IBM1162 charsets.
1836 * Andreas Jaeger contributed a port to x86-64/Linux.
1838 * Peter Bruin contributed a port to PowerPC/Hurd.
1840 * libc functions using I/O streams now can handle wide-oriented streams
1843 * optimizations in the dynamic linker. Binaries created by recent binutils
1844 versions start up quicker due to reduced time spent on relocations.
1846 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1850 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1851 asinh, atanh, j0 for the 128-bit long double format.
1853 * Bruno Haible updated all the code handling Unicode in some form to
1854 support Unicode 3.1.
1856 * Speed of regex for single-byte locales is back to previous levels.
1857 Patch by Isamu Hasegawa.
1859 * Alpha, SPARC, and IA-64 now also using floating stacks.
1861 * Startup time of internationalized applications greatly improved through
1862 iconv cache. Use iconvconfig to generate the cache file.
1863 Contributed by Ulrich Drepper.
1865 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1866 severe performance problems. Patch by David Mosberger.
1868 * The Hurd port got a lot more functionality like AIO, various stdio
1869 extensions, etc. Mainly done by Roland McGrath.
1871 * mtrace can now lookup symbols in shared libraries.
1875 * Intel's IA-64 math library is largely integrated. It provides fast and
1876 accurate implementatations for most basic and standard math functions
1877 in float, double, and long double format.
1879 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1880 and asin for the 96-bit long double format and asin, log, tan for the
1881 128-bit long double format.
1883 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1884 The basic double functions exist today. Contributed by Abraham Ziv
1885 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1886 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1888 * An asynchronous name lookup library was added. The interface is designed
1889 after POSIX AIO. The proposal was circulated beforehand to get comments.
1890 No negative ones came in. Implemented by Ulrich Drepper.
1892 * Port to S390/64bit contributed by Martin Schwidefsky
1893 <schwidefsky@de.ibm.com>.
1895 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1896 of functions for Linux/IA-64.
1898 * The RPC code is now thread safe. Threads can now use the same service
1899 of different services at the same time. Patch by Eric Norum
1900 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1902 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1903 family of functions for Linux/S390.
1905 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1906 of functions for Linux/x86.
1908 * Port to Linux/CRIS contributed by Axis Communications.
1912 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1913 we can now check for namespace violations and missing declarations. The
1914 result is that almost all headers are now Unix-compliant (as defined in
1915 the upcoming XPG6). The negative side is that some programs might need
1916 corrections, too, if they depend on the incorrect form of the headers in
1917 previous versions which defined too many symbols and included too many
1920 * regex now handles multibyte character sets correctly.
1921 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1923 * iconv (the program) does now conform to the upcoming XPG6 and handles
1924 charmaps. Instead of the charset names the path of charmaps can be
1925 provided and the conversion happens based on this data.
1926 Contributed by Ulrich Drepper.
1928 * The locale program now provides detailed information about the installed
1933 only lists the names of the supported locales
1937 provides details such as country, language, and codeset name.
1938 Contributed by Ulrich Drepper.
1942 * The gencat program now parses the input file according to the charset
1943 selected by the LC_CTYPE category. This is important for stateful
1944 character sets. To make generating catalogs easier there is a way
1945 to overwrite the charset selected by the locale: before the first
1946 message or $ quote line the catalog can contain a line like
1948 $ codeset=ISO-8859-2
1950 to select the charset (ISO-8859-2 in this case).
1952 Implemented by Shinya Hanataka and Ulrich Drepper.
1954 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1955 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1956 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1958 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1959 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1961 * The LANGUAGE environment variable is now ignored unless the locale is
1962 changed from the default "C" locale.
1964 * The usual bug fixes.
1968 * Greg McGary added runtime support for bounds checking using gcc's
1969 new -fbounded-pointers option. ix86 target is complete. PowerPC
1972 * Thorsten Kukuk added secure mode support to nscd.
1974 * The Berkeley db libraries have been removed.
1976 Related, the nss_db module is now in a separate package since it
1977 obviously requires a database library being available.
1979 * Wide character I/O streams implemented by Ulrich Drepper.
1981 * Functions from the extended socket API added by Ulrich Drepper.
1983 * Functions feenableexcept and fedisableexcept to control the
1984 behaviour of individual exceptions have been added by Andreas Jaeger.
1986 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1988 * The resolver code has been updated from bind 8.2.3-T5B which supports
1989 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1992 This change could in some situations effect backward compatibility. Since
1993 now `_res' is a thread-local instead of a global variable, modifying it
1994 in one thread does not have any effect in other threads.
1996 The resolver library was also extended to allow IPv6 as the transport
1997 protocol for the requests. This work was done by Stig Venaas.
1999 * Compatibility code for K&R C compilers has been removed from the
2000 header files. A ISO C compiler is needed to use the library
2001 (conforming to either C89 or C99 standard).
2003 * Complete rewrite of the localedef program to support multibyte character
2004 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
2005 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
2006 Implemented by Ulrich Drepper.
2008 Bruno Haible significantly improved the generation and use of the data
2009 structures for the wide character tables.
2011 * Plural handling in gettext implemented by Ulrich Drepper.
2013 * The utmp daemon has been removed.
2015 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2017 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2020 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2022 * POSIX barriers implemented by Kaz Kylheku.
2024 * POSIX spawn function family implemented by Ulrich Drepper.
2026 * POSIX spinlocks are now available.
2028 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2030 * the configure option --enable-kernel=X.Y.Z allows to strip out
2031 compatibility for kernel versions before X.Y.Z. This is currently only
2032 implemented for Linux.
2034 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2035 field sin6_scope_id. This means that all programs using IPv6 should be
2036 recompiled. Don't expect binary compatibility with previous glibc
2039 * various conversion modules for IBM character sets contributed by
2042 * IA-64 port by Jes Sorensen and HJ Lu.
2056 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2058 * New xdr functions are added; some rpc functions are now 64bit clean.
2060 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2062 * Fixed known incompatibilities with glibc 2.0.
2064 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2066 * Optimized a number of functions (especially the ELF dynamic loader).
2068 * Update timezone data files.
2070 * lots of charmaps corrections
2072 * some new locale definitions and charmaps
2077 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2078 conform to POSIX member type requirements. Symbol versions have been
2079 adjusted as needed within the library, and for direct use by applications,
2080 but there is potential for problems if third-party libraries use
2081 struct timeval as part of their interface. This does not present
2082 a problem for X and other "essential" system libraries.
2084 * An additional locale model to support C++ Standard Library locale
2085 model and probably more was implemented by Ulrich Drepper.
2087 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2090 * Miles Bader provided the `argp' function family to support hierachical
2091 command line argument parsing, layered on top of getopt.
2093 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2095 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2098 * scanf recognizes the %a and %A format for scanning floating point numbers.
2100 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2101 information and interfaces for the available integer types.
2103 * about 130 new math functions were added to implement the ISO C9x math
2106 * the new header <complex.h> contains definitions of the complex math
2107 functions from ISO C 9X.
2109 * the new header <tgmath.h> defines generic macros to use complex or
2110 real valued functions.
2112 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2114 * Andreas Jaeger provided a test suite for the math library.
2116 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2118 * Ulrich Drepper added character set conversion functions (iconv).
2120 * Optimized string functions have been added.
2122 * The localedata addon is now part of glibc.
2124 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2126 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2127 daemon for NSS (nscd).
2129 Missing a better place here are some numbers on improvements. Under
2130 Linux 2.1.125 un-tar-ing the kernel sources takes
2134 using local files 12.19s 6.88s 22.91s
2136 using NIS 13.92s 8.91s 26.34s
2138 using NIS & nscd 10.37s 7.34s 25.30s
2140 using NIS+ 27.57s 30.37s 640.46s
2142 using NIS+ & nscd 10.25s 7.83s 26.51s
2144 using NIS & old nscd [1] 13.83s 8.32s 29.60s
2146 Keep in mind that non-namelookup related operations dominate above times.
2147 It was just a common complain that using NIS+ unpacking the kernel is
2150 [1] The old nscd implementation is not available anymore since it was
2151 distributed with glibc up to version 2.0.98 and thus is now replaced.
2153 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
2155 * Mark Kettenis provided a Hesiod NSS module.
2157 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
2158 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
2160 * rcmd can now handle netgroups (Dick Streefland).
2162 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
2165 * Support for the IPv6 protocol has been added to the socket API, as per the
2166 latest draft standards.
2168 * Support for Linux 2.2 has been added.
2170 * Interface changes relative to the latest 2.0.x release:
2171 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2172 addseverity NEW: Unix98
2173 alphasort64 NEW: LFS
2174 argp_err_exit_status NEW: argp, GNU ext
2175 argp_error NEW: argp, GNU ext
2176 argp_failure NEW: argp, GNU ext
2177 argp_help NEW: argp, GNU ext
2178 argp_parse NEW: argp, GNU ext
2179 argp_program_bug_address NEW: argp, GNU ext
2180 argp_program_version NEW: argp, GNU ext
2181 argp_program_version_hook NEW: argp, GNU ext
2182 argp_state_help NEW: argp, GNU ext
2183 argp_usage NEW: argp, GNU ext
2184 authdes_create NEW: Secure RPC
2185 authdes_getucred NEW: Secure RPC
2186 authdes_pk_create NEW: Secure RPC
2187 backtrace NEW: GNU ext.
2188 backtrace_symbols NEW: GNU ext.
2189 backtrace_symbols_fd NEW: GNU ext.
2191 cacosf NEW: ISO C 9x
2192 cacosh NEW: ISO C 9x
2193 cacoshf NEW: ISO C 9x
2194 cacoshl NEW: ISO C 9x
2195 cacosl NEW: ISO C 9x
2202 casinf NEW: ISO C 9x
2203 casinh NEW: ISO C 9x
2204 casinhf NEW: ISO C 9x
2205 casinhl NEW: ISO C 9x
2206 casinl NEW: ISO C 9x
2208 catanf NEW: ISO C 9x
2209 catanh NEW: ISO C 9x
2210 catanhf NEW: ISO C 9x
2211 catanhl NEW: ISO C 9x
2212 catanl NEW: ISO C 9x
2213 cbc_crypt NEW: Secure RPC
2217 ccoshf NEW: ISO C 9x
2218 ccoshl NEW: ISO C 9x
2224 cimagf NEW: ISO C 9x
2225 cimagl NEW: ISO C 9x
2226 clearerr_locked REMOVED
2227 clntunix_create NEW: sunrpc ext
2229 clog10 NEW: ISO C 9x
2230 clog10f NEW: ISO C 9x
2231 clog10l NEW: ISO C 9x
2241 cprojf NEW: ISO C 9x
2242 cprojl NEW: ISO C 9x
2244 crealf NEW: ISO C 9x
2245 creall NEW: ISO C 9x
2250 csinhf NEW: ISO C 9x
2251 csinhl NEW: ISO C 9x
2254 csqrtf NEW: ISO C 9x
2255 csqrtl NEW: ISO C 9x
2259 ctanhf NEW: ISO C 9x
2260 ctanhl NEW: ISO C 9x
2262 des_setparity NEW: Secure RPC
2263 ecb_crypt NEW: Secure RPC
2264 endutxent NEW: Unix98
2266 exp10f NEW: ISO C 9x
2267 exp10l NEW: ISO C 9x
2271 fattach NEW: STREAMS
2272 fdetach NEW: STREAMS
2276 feclearexcept NEW: ISO C 9x
2277 fegetenv NEW: ISO C 9x
2278 fegetexceptflag NEW: ISO C 9x
2279 fegetround NEW: ISO C 9x
2280 feholdexcept NEW: ISO C 9x
2282 feraiseexcept NEW: ISO C 9x
2283 ferror_locked REMOVED
2284 fesetenv NEW: ISO C 9x
2285 fesetexceptflag NEW: ISO C 9x
2286 fesetround NEW: ISO C 9x
2287 fetestexcept NEW: ISO C 9x
2288 feupdateenv NEW: ISO C 9x
2289 fflush_locked REMOVED
2293 fgets_unlocked NEW: GNU ext.
2294 fileno_locked REMOVED
2306 fputc_locked REMOVED
2307 fputs_unlocked NEW: GNU ext.
2308 fread_unlocked NEW: GNU ext.
2313 fstatvfs NEW: Unix98
2317 ftruncate64 NEW: LFS
2319 fwrite_unlocked NEW: GNU ext.
2320 gai_strerror NEW: IPv6
2324 getchar_locked REMOVED
2326 getdate_err NEW: Unix98
2327 getdate_r NEW: GNU ext.
2329 getnameinfo NEW: IPv6
2330 getnetname NEW: Secure RPC
2331 getpmsg NEW: STREAMS
2332 getpt NEW: Unix98 PTY
2333 getrlimit64 NEW: LFS
2334 getutxent NEW: Unix98
2335 getutxid NEW: Unix98
2336 getutxline NEW: Unix98
2337 glob64 NEW: GNU ext.
2338 globfree64 NEW: GNU ext.
2339 gnu_get_libc_release NEW: GNU ext.
2340 gnu_get_libc_version NEW: GNU ext.
2341 grantpt NEW: Unix98 PTY
2342 host2netname NEW: Secure RPC
2344 iconv_close NEW: iconv
2345 iconv_open NEW: iconv
2346 if_freenameindex NEW: IPv6
2347 if_indextoname NEW: IPv6
2348 if_nameindex NEW: IPv6
2349 if_nametoindex NEW: IPv6
2350 in6addr_any NEW: IPv6
2351 in6addr_loopback NEW: IPv6
2352 inet6_isipv4mapped NEW: IPv6
2353 isastream NEW: STREAMS
2354 iswblank NEW: GNU ext.
2355 key_decryptsession NEW: Secure RPC
2356 key_decryptsession_pk NEW: Secure RPC
2357 key_encryptsession NEW: Secure RPC
2358 key_encryptsession_pk NEW: Secure RPC
2359 key_gendes NEW: Secure RPC
2360 key_get_conv NEW: Secure RPC
2361 key_secretkey_is_set NEW: Secure RPC
2362 key_setnet NEW: Secure RPC
2363 key_setsecret NEW: Secure RPC
2364 llrint NEW: ISO C 9x
2365 llrintf NEW: ISO C 9x
2366 llrintl NEW: ISO C 9x
2367 llround NEW: ISO C 9x
2368 llroundf NEW: ISO C 9x
2369 llroundl NEW: ISO C 9x
2374 lrintf NEW: ISO C 9x
2375 lrintl NEW: ISO C 9x
2376 lround NEW: ISO C 9x
2377 lroundf NEW: ISO C 9x
2378 lroundl NEW: ISO C 9x
2380 makecontext NEW: Unix98
2381 mempcpy NEW: GNU ext.
2384 modify_ldt NEW: kernel
2388 nearbyint NEW: ISO C 9x
2389 nearbyintf NEW: ISO C 9x
2390 nearbyintl NEW: ISO C 9x
2391 netname2host NEW: Secure RPC
2392 netname2user NEW: Secure RPC
2393 nexttoward NEW: ISO C 9x
2394 nexttowardf NEW: ISO C 9x
2395 nexttowardl NEW: ISO C 9x
2399 passwd2des NEW: Secure RPC
2401 pow10f NEW: GNU ext.
2402 pow10l NEW: GNU ext.
2405 printf_size NEW: GNU ext.
2406 printf_size_info NEW: GNU ext.
2407 profil_counter REMOVED
2408 pthread_mutexattr_getkind_np REPLACED
2409 pthread_mutexattr_setkind_np REPLACED
2410 ptsname NEW: Unix98 PTY
2411 ptsname_r NEW: Unix98 PTY
2413 putchar_locked REMOVED
2414 putgrent NEW: GNU ext.
2416 putpmsg NEW: STREAMS
2417 pututxline NEW: Unix98
2421 readdir64_r NEW: LFS
2422 remquo NEW: ISO C 9x
2423 remquof NEW: ISO C 9x
2424 remquol NEW: ISO C 9x
2426 roundf NEW: ISO C 9x
2427 roundl NEW: ISO C 9x
2429 scalbln NEW: ISO C 9x
2430 scalblnf NEW: ISO C 9x
2431 scalblnl NEW: ISO C 9x
2433 sendfile NEW: kernel
2434 setcontext NEW: Unix98
2435 setrlimit64 NEW: LFS
2436 setutxent NEW: Unix98
2438 sigignore NEW: Unix98
2439 sigqueue NEW: POSIX.1b
2440 sigrelse NEW: Unix98
2441 sigset NEW: POSIX.1b
2442 sigtimedwait NEW: POSIX.1b
2443 sigwaitinfo NEW: POSIX.1b
2444 sincos NEW: GNU ext.
2445 sincosf NEW: GNU ext.
2446 sincosl NEW: GNU ext.
2450 strcasestr NEW: GNU ext.
2451 strtoimax NEW: ISO C 9x
2452 strtoumax NEW: ISO C 9x
2453 strverscmp NEW: GNU ext.
2454 svcauthdes_stats NEW: Secure RPC
2455 svcunix_create NEW: sunrpc etx
2456 svcunixfd_create NEW: sunrpc ext
2457 swapcontext NEW: Unix98
2458 tcgetsid NEW: Unix98 PTY
2459 tdestroy NEW: GNU ext.
2460 tgamma NEW: ISO C 9x
2461 tgammaf NEW: ISO C 9x
2462 tgammal NEW: ISO C 9x
2466 truncf NEW: ISO C 9x
2467 truncl NEW: ISO C 9x
2469 unlockpt NEW: Unix98 PTY
2470 updwtmpx NEW: Unix98
2471 user2netname NEW: Secure RPC
2472 utmpxname NEW: Unix98
2473 versionsort NEW: GNU ext.
2474 versionsort64 NEW: GNU ext.
2476 wcscasecmp NEW: GNU ext.
2477 wcsncasecmp NEW: GNU ext.
2478 wcsnlen NEW: GNU ext.
2479 wcstoimax NEW: ISO C 9x
2480 wcstoll NEW: ISO C 9x
2481 wcstoull NEW: ISO C 9x
2482 wcstoumax NEW: ISO C 9x
2484 wordexp NEW: POSIX.2
2485 wordfree NEW: POSIX.2
2486 write_profiling REMOVED
2487 xdecrypt NEW: Secure RPC
2488 xdr_authdes_cred NEW: Secure RPC
2489 xdr_authdes_verf NEW: Secure RPC
2490 xdr_cryptkeyarg NEW: Secure RPC
2491 xdr_cryptkeyarg2 NEW: Secure RPC
2492 xdr_cryptkeyres NEW: Secure RPC
2493 xdr_getcredres NEW: Secure RPC
2494 xdr_key_netstarg NEW: Secure RPC
2495 xdr_key_netstres NEW: Secure RPC
2496 xdr_keybuf NEW: Secure RPC
2497 xdr_keystatus NEW: Secure RPC
2498 xdr_netnamestr NEW: Secure RPC
2499 xdr_sizeof NEW: Secure RPC
2500 xdr_unixcred NEW: sunrpc ext
2501 xencrypt NEW: Secure RPC
2502 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2513 * inet_ntoa is thread-safe
2515 * updwtmp is moved from libutil to libc
2517 * rewrite of cbrt function
2519 * update of timezone data
2533 * add atoll function
2535 * fix complex problems in Berkeley DB code
2537 * fix math functions
2541 * fixed lots of header problems (especially Linux/GNU specific)
2543 * dynamic loader preserves all registers
2545 * Roland McGrath provided support for handling of auxiliary objects in
2546 the ELF dynamic loader.
2548 * support for parallel builds is improved
2552 * GNU extensions are no longer declared by default. To enable them you
2553 must define the macro `_GNU_SOURCE' in your program or compile with
2556 * The library has changed from using GNU ld symbol aliases to using weak
2557 symbols where available. The ELF object file format supports weak
2558 symbols; GNU ld also supports weak symbols in the a.out format. (There
2559 is also now support for other GNU ld extensions in ELF. Use the
2560 `--with-elf' option to configure to indicate you have ELF, and
2561 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2562 of many files which contained only symbol aliases, reducing the size of
2563 the source and the compiled library; many other files were renamed to
2564 less cryptic names previously occupied by the symbol alias files.
2565 There is a new header file <elf.h> for programs which operate on
2566 files in the ELF format.
2568 * Converted to Autoconf version 2, so `configure' has more options.
2569 Run `configure --help' to see the details.
2571 * The library can now be configured to build profiling, highly-optimized
2572 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2573 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2574 `configure' enable building these extra libraries. The shared library is
2575 built by default when using both ELF and GNU ld. When shared libraries
2576 are enabled, the new library `-ldl' is available for arbitrary run-time
2577 loading of shared objects; its interface is defined in <dlfcn.h>. The
2578 new header file <link.h> gives access to the internals of the run-time
2579 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2580 application of same name on other systems and it provides information
2581 about dynamically linked binaries.
2583 * The C library now provides the run-time support code for profiling
2584 executables compiled with `-pg'. Programs can control the profiling code
2585 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2586 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2587 the support for this file format was contributed by David Mosberger-Tang.
2589 * The math code has been replaced with a math library based on fdlibm from
2590 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2591 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2592 functions. The math functions now reside in a separate library, so
2593 programs using them will need to use `-lm' their linking commands.
2595 * John C. Bowman contributed optimized ix87 assembler inline functions.
2597 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2598 mechanism similar to that found in Solaris 2. This is now used for the
2599 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2600 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2601 file controls what services are used for each individual database. This
2602 works by loading shared libraries with names specified in `nsswitch.conf',
2603 so service modules can be changed or added at any time without even
2604 relinking any program. Currently there are the file, db, and NIS based
2605 NSS services available.
2607 * The new functions `strtoq' and `strtouq' parse integer values from
2608 strings, like `strtol' and `strtoul', but they return `long long int' and
2609 `unsigned long long int' values, respectively (64-bit quantities).
2611 * The new functions `strtof' and `strtold' parse floating-point values from
2612 strings, like `strtod', but they return `float' and `long double' values,
2613 respectively (on some machines `double' and `long double' are the same).
2615 * Ulrich Drepper has contributed new implementations of the floating-point
2616 printing and reading code used in the `printf' family of functions and
2617 `strtod', `strtof', and `strtold'. These new functions are perfectly
2618 accurate, and much faster than the old ones.
2620 * The implementation of the POSIX locale model was completely rewritten by
2621 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2622 to compile the POSIX locale definition.
2624 * The former dummy implementations of the strcoll and strxfrm function are
2625 now replaced by fully functional code contributed by Ulrich Drepper. The
2626 collation information comes from the POSIX locale definitions.
2628 * The new header <langinfo.h> defines an interface for accessing
2629 various locale-dependent data (using the locale chosen with `setlocale').
2631 * Ulrich Drepper has contributed a new suite of functions for operation on
2632 wide-character and multibyte-character strings, in <wchar.h>;
2633 and classification and case conversion of wide characters, in <wctype.h>.
2634 These new functions are conforming to the ISO C, Amendement 1 specification.
2636 * There is now a second implementation of the standard I/O library available.
2637 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2638 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2640 * You can now use positional parameter specifications in format strings
2641 for the `printf' and `scanf' families of functions. For example,
2642 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2643 ``Number 6, Mr Jones''. This is mainly useful when providing different
2644 format strings for different languages, whose grammars may dictate
2645 different orderings of the values being printed. To support this
2646 feature, the interface for `register_printf_handler' has changed; see
2647 the header file <printf.h> for details.
2649 * The `printf' and `scanf' families of functions now understand a new
2650 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2651 to group numbers as indicated by the locale; for `scanf' and friends, this
2652 says to accept as valid only a number with all the proper grouping
2653 separators in the right places. In the default "C" locale, numbers are
2654 not grouped; but locales for specific countries will define the usual
2655 conventions (i.e. separate thousands with `,' in the US locale).
2657 * The pgrp functions have been regularized, slightly incompatibly but much
2658 less confusingly. The core functions are now `getpgid' and `setpgid',
2659 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2660 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2661 provided for compatibility. There is no longer an incompatible `getpgrp'
2662 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2664 * The new header file <fts.h> and suite of functions simplify programs that
2665 operate on directory trees. This code comes from 4.4 BSD.
2667 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2668 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2669 NSS scheme used in glibc.
2671 * There is a new malloc debugging hook `__memalign_hook'.
2673 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2674 `unsigned int' in <sys/types.h>. These are for compatibility only and
2675 their use is discouraged.
2677 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2678 done differently, so that it works even without GNU ld.
2680 * New function `euidaccess' checks allowed access to a file like `access',
2681 but using the effective IDs instead of the real IDs.
2683 * The time zone data files have been updated for the latest and greatest
2684 local time conventions of the countries of the world.
2686 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2689 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2690 for formatting floating-point numbers. They are provided only for
2691 compatibility; new programs should use `sprintf' instead. There are
2692 also equivalent function for the `long double' floating-point type and
2693 all functions also exist in a reentrant form.
2695 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2696 functions for maintaining the login-record files (primarily of use to
2697 system programs such as `login'), and convenient functions for
2698 allocating and initializing a pseudo-terminal (pty) device.
2700 * Ulrich Drepper has contributed new support for System V style
2701 shared memory and IPC on systems that support it.
2703 * Ulrich Drepper has contributed several miscellaneous new functions found
2704 in System V: The `hsearch' family of functions provide an effective
2705 implementation of hash tables; `a64l' and `l64a' provide a very simple
2706 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2709 * Ulrich Drepper has contributed new reentrant counterparts for the
2710 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2712 * Ulrich Drepper has contributed new, highly-optimized versions of several
2713 string functions for the i486/Pentium family of processors.
2715 * Ulrich Drepper has updated the Linux-specific code, based largely
2716 on work done in Hongjiu Lu's version of GNU libc for Linux.
2717 The GNU library now supports Linux versions 2.0.10 and later,
2718 using the ELF object file format (i[3456]86-*-linux).
2720 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2722 * David Mosberger-Tang and Richard Henderson have ported the C library
2723 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2724 dynamic linking support for ELF/Alpha.
2726 * Richard Henderson contributed several Alpha optimized assembler function
2727 for arithmetic and string handling.
2729 * Ulrich Drepper has contributed a new set of message catalog functions to
2730 support multiple languages using the <libintl.h> interface, for use with
2731 his new package GNU gettext. Translation volunteers have contributed
2732 catalogs of the library's messages in Spanish, German, and Korean.
2734 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2735 program and the `catgets' function for reading the catalog files it
2736 creates. (The <libintl.h> interface is preferred; we include the
2737 <nl_types.h> interface using `catgets' only for source compatibility with
2738 programs already written to use it.)
2740 * New header file <values.h> gives SVID-compatible names for <limits.h>
2743 * Various new macros, declarations, and small header files for compatibility
2746 * New function `group_member' is a convenient way to check if a process has
2747 a given effective group ID.
2749 * When using GCC 2.7 and later, the socket functions are now declared in a
2750 special way so that passing an argument of type `struct sockaddr_in *',
2751 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2752 `struct sockaddr *' type, does not generate a type-clash warning.
2754 * New function `error' declared in header file <error.h> is a convenient
2755 function for printing error messages and optionally exiting; this is the
2756 canonical function used in GNU programs. The new functions `err', `warn',
2757 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2758 doing the same thing.
2760 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2761 POSIX.2 `glob' function to do ~ and {...} expansion.
2763 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2764 `clearenv' which is used in POSIX.9 is also available.
2766 * New function `getsid' returns session ID number on systems that support it.
2768 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2769 files <db.h> and <mpool.h> provide a rich set of functions for several
2770 types of simple databases stored in memory and in files, and <ndbm.h> is
2771 an old `ndbm'-compatible interface using the `db' functions. Link with
2772 `-ldb' to get these functions.
2774 * New macro `strdupa' copies a string like `strdup', but uses local stack
2775 space from `alloca' instead of dynamic heap space from `malloc'.
2777 * New function `strnlen' is like `strlen' but searches only a given maximum
2778 number of characters for the null terminator. `stpncpy', `strndup' and
2779 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2782 * New function `statfs' in header <sys/statfs.h>.
2784 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2785 provide convenient functions for operating on blocks of null-terminated
2788 * A new suite of functions in <utmp.h> handle all the details of reading
2789 and writing the utmp file.
2791 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2794 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2795 completely POSIX compliant and also implemented the extended functionality
2796 to handle alternate digit representation and alternate era date formats.
2798 * Ulrich Drepper provided an implementation of the `strptime' function
2799 defined in XPG4.2 which transforms a string into a `struct tm' value.
2801 * Paul Eggert provided the tzselect shell script as part of the timezone
2802 code. The shell script makes it easy to select the correct timezone
2805 * The implementation of the malloc family of functions is completely replaced
2806 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2807 The implementation uses the mmap function (if available) and it is
2808 optimized for the use in multi threaded programs.
2810 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2811 functions. This new functionality is usable by specifying a special
2812 salt string and it is compatible with implementation on *BSD systems.
2814 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2815 `getsubopt' to handle second level command line options, `bsd_signal'
2816 to access BSD style `signal' functionality, the obsolete `regexp' style
2819 * the `lchown' function is available on system which support this
2822 * The implementation of the shadow password handling function was contributed
2825 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2827 * POSIX.1g support was added. The <sys/select.h> header is available,
2828 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2829 implementation of `getaddrinfo'.
2833 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2835 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2836 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2838 * The new function `daemon' from 4.4 BSD is useful for server programs that
2839 want to put themselves in the background.
2841 * Joel Sherrill has contributed support for several standalone boards that
2842 run without an operating system.
2844 * `printf', `scanf' and friends now accept a `q' type modifier for long
2845 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2847 * All of the code taken from BSD (notably most of the math and networking
2848 routines) has been updated from the BSD 4.4-Lite release.
2850 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2852 * The new functions `getdomainname' and `setdomainname' fetch or change the
2853 YP/NIS domain name. These are system calls which exist on systems which
2856 * The time zone data files have been updated for the latest international
2859 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2860 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2864 * The C library now includes support for Sun RPC, from Sun's free
2865 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2866 are included. (There is still no support for YP.)
2868 * Tom Quinn has contributed a port of the C library to SGI machines running
2869 Irix 4 (mips-sgi-irix4).
2871 * The new `lockf' function is a simplified interface to the locking
2872 facilities of `fcntl', included for compatibility.
2874 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2876 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2878 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2881 * The error message printed by `assert' for a failed assertion now includes
2882 the name of the program (if using GNU ld) and the name of the calling
2883 function (with versions of GCC that support this).
2885 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2887 * The library now includes the <sys/mman.h> header file and memory
2888 management functions `mmap', `munmap', `mprotect', `msync', and
2889 `madvise', on systems that support those facilities.
2891 * The interface for `mcheck' has changed slightly: the function called to
2892 abort the program when an allocation inconsistency is detected now takes
2893 an argument that indicates the type of failure. The new function
2894 `mprobe' lets you request a consistency check for a particular block at
2895 any time (checks are normally done only when you call `free' or `realloc'
2898 * It is now possible to easily cross-compile the C library, building on one
2899 system a library to run on another machine and/or operating system. All
2900 you need to do is set the variable `HOST_CC' in `configparms' to the
2901 native compiler for programs to run on the machine you are building on (a
2902 few generator programs are used on Unix systems); set `CC' to the
2905 * The new function `fexecve' (only implemented on the GNU system) executes
2906 a program file given a file descriptor already open on the file.
2910 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2911 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2913 * You can set the variable `libprefix' in `configparms' to specify a prefix
2914 to be prepended to installed library files; this makes it easy to install
2915 the GNU C library to be linked as `-lgnuc' or whatever.
2917 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2918 copies a limited number of characters from a string, and returns the
2919 address of the last character written.
2921 * You no longer need to check for whether the installed `stddef.h' is
2922 compatible with the GNU C library. configure now checks for you.
2924 * You can now define a per-stream `fileno' function to convert the
2925 stream's cookie into an integral file descriptor.
2927 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2928 allocates zero bytes of storage, and returns a unique pointer which
2929 you can pass to `realloc' or `free'. The behavior is undefined if
2930 you dereference this pointer.
2932 * The C library now runs on Sony NEWS m68k machines running either
2933 NewsOS 3 or NewsOS 4.
2935 * The new `syscall' function is a system-dependent primitive function
2936 for invoking system calls. It has the canonical behavior on Unix
2937 systems, including unreliable return values for some calls (such as
2938 `pipe', `fork' and `getppid').
2940 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2941 to `EAGAIN', which is the preferred name. On systems whose kernels
2942 use two distinct codes, the C library now translates EWOULDBLOCK to
2943 EAGAIN in every system call function.
2947 * The GNU C Library Reference Manual is now distributed with the library.
2948 `make dvi' will produce a DVI file of the printed manual.
2949 `make info' will produce Info files that you can read on line using C-h i
2950 in Emacs or the `info' program.
2951 Please send comments on the manual to bug-glibc-manual@gnu.org.
2953 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2955 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2957 * Jason Merrill has contributed a port to the Sequent Symmetry running
2958 Dynix version 3 (i386-sequent-dynix).
2960 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2961 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2963 * New function `memory_warnings' lets you arrange to get warnings when
2964 malloc is running out of memory to allocate, like Emacs gives you.
2966 * The C library now contains the relocating allocator used in Emacs 19 for
2967 its editing buffers. This allocator (ralloc) minimizes allocation
2968 overhead and fragmentation by moving allocated regions around whenever it
2969 needs to. You always refer to a ralloc'd region with a "handle" (a
2970 pointer to a pointer--an object of type `void **').
2972 * There is a new `printf' format: `%m' gives you the string corresponding
2973 to the error code in `errno'.
2975 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2976 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2977 pass, the `a' modifier says to fill in a `char **' you pass with a
2980 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2981 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2982 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2984 * `mkstemp' is a traditional Unix function to atomically create and open a
2985 uniquely-named temporary file.
2989 * The standard location for the file that says what the local timezone is
2990 has changed again. It is now `/usr/local/etc/localtime' (or more
2991 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2993 * The distribution no longer contains any files with names longer than 14
2996 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2997 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2999 * New functions `ttyslot' and `syslog' from 4.4 BSD.
3003 * The configuration process has changed quite a bit. The `configure'
3004 script is now used just like the configuration scripts for other GNU
3005 packages. The `sysdeps' directory hierarchy is much rearranged.
3006 The file `INSTALL' explains the new scheme in detail.
3008 * The header files no longer need to be processed into ANSI C and
3009 traditional C versions. There is just one set of files to install, and
3010 it will work with ANSI or old C compilers (including `gcc -traditional').
3012 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3013 MIPS DECStation running Ultrix 4.
3015 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3016 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3017 made itself into a shared library.
3019 * Yet further improved support for the i386, running 4.3 BSD-like systems
3020 (such as Mach 3 with the Unix single-server), or System V.
3022 * New function `strncasecmp' to do case-insensitive string comparison
3023 with limited length.
3025 * New function `strsep' is a reentrant alternative to `strtok'.
3027 * New functions `scandir' and `alphasort' for searching directories.
3029 * New function `setenv' is a better interface to `putenv'.
3031 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3032 function for traversing a directory tree.
3034 * The GNU obstack package is now also part of the C library.
3035 The new function `open_obstack_stream' creates a stdio stream that
3036 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3037 formatted output directly to an obstack.
3039 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3040 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3042 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3044 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3045 things to your strings.
3047 * There are some new test programs: test-fseek, testmb, and testrand.
3049 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3050 These ports are not finished, but are a good starting place for really
3051 supporting those systems.
3053 * `/etc/localtime' is now the standard location for the file that says what
3054 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3055 This follows the general principle that `/etc' is the place for all local
3056 configuration files.
3058 * The C library header files now use `extern "C"' when used by the C++
3059 compiler, so the C library should now work with C++ code.
3061 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3062 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3065 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3066 function which uses the `merge sort' algorithm, and is said to be
3067 significantly faster than the old GNU `qsort' function. Merge sort is
3068 now the standard `qsort' function. The new algorithm can require a lot
3069 of temporary storage; so, the old sorting function is called when the
3070 required storage is not available.
3072 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3073 provides the Unix `crypt' function, plus some other entry points.
3075 * The code and header files taken from 4.4 BSD have been updated with the
3076 latest files released from Berkeley.
3078 ----------------------------------------------------------------------
3079 Copyright information:
3081 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3083 Permission is granted to anyone to make or distribute verbatim copies
3084 of this document as received, in any medium, provided that the
3085 copyright notice and this permission notice are preserved,
3086 thus giving the recipient permission to redistribute in turn.
3088 Permission is granted to distribute modified versions
3089 of this document, or of portions of it,
3090 under the above conditions, provided also that they
3091 carry prominent notices stating who last changed them.
3094 version-control: never