The GNU C Library version 2.36 is now available

posted by Tux Machines on Aug 02, 2022

The GNU C Library 
================= 
The GNU C Library version 2.36 is now available. 
The GNU C Library is used as the C library in the GNU system and 
in GNU/Linux systems, as well as many other systems that use Linux 
as the kernel. 
The GNU C Library is primarily designed to be a portable 
and high performance C library.  It follows all relevant 
standards including ISO C11 and POSIX.1-2017.  It is also 
internationalized and has one of the most complete 
internationalization interfaces known. 
The GNU C Library webpage is at http://www.gnu.org/software/libc/ 
Packages for the 2.36 release may be downloaded from: 
        http://ftpmirror.gnu.org/libc/ 
        http://ftp.gnu.org/gnu/libc/ 
The mirror list is at http://www.gnu.org/order/ftp.html 
NEWS for version 2.36 
===================== 
Major new features: 
Support for DT_RELR relative relocation format has been added to
  glibc.  This is a new ELF dynamic tag that improves the size of 
  relative relocations in shared object files and position independent 
  executables (PIE).  DT_RELR generation requires linker support for 
  -z pack-relative-relocs option, which is supported for some targets 
  in recent binutils versions.  Lazy binding doesn't apply to DT_RELR. 
On Linux, the pidfd_open, pidfd_getfd, and pidfd_send_signal functions
  have been added.  The pidfd functionality provides access to a process 
  while avoiding the issue of PID reuse on tranditional Unix systems. 
On Linux, the process_madvise function has been added. It has the
  same functionality as madvise but alters the target process identified 
  by the pidfd. 
On Linux, the process_mrelease function has been added.  It allows a
  caller to release the memory of a dying process.  The release of the 
  memory is carried out in the context of the caller, using the caller's 
  CPU affinity, and priority with CPU usage accounted to the caller. 
The “no-aaaa” DNS stub resolver option has been added.  System
  administrators can use it to suppress AAAA queries made by the stub 
  resolver, including AAAA lookups triggered by NSS-based interfaces 
  such as getaddrinfo.  Only DNS lookups are affected: IPv6 data in 
  /etc/hosts is still used, getaddrinfo with AI_PASSIVE will still 
  produce IPv6 addresses, and configured IPv6 name servers are still 
  used.  To produce correct Name Error (NXDOMAIN) results, AAAA queries 
  are translated to A queries.  The new resolver option is intended 
  primarily for diagnostic purposes, to rule out that AAAA DNS queries 
  have adverse impact.  It is incompatible with EDNS0 usage and DNSSEC 
  validation by applications. 
On Linux, the fsopen, fsmount, move_mount, fsconfig, fspick, open_tree,
  and mount_setattr have been added.  They are part of the new Linux kernel 
  mount APIs that allow applications to more flexibly configure and operate 
  on filesystem mounts.  The new mount APIs are specifically designed to work 
  with namespaces. 
localedef now accepts locale definition files encoded in UTF-8.
  Previously, input bytes not within the ASCII range resulted in 
  unpredictable output. 
Support for the mbrtoc8 and c8rtomb multibyte/UTF-8 character conversion
  functions has been added per the ISO C2X N2653 and C++20 P0482R6 proposals. 
  Support for the char8_t typedef has been added per the ISO C2X N2653 
  proposal.  The functions are declared in uchar.h in C2X mode or when the 
  _GNU_SOURCE macro or C++20 __cpp_char8_t feature test macro is defined.
  The char8_t typedef is declared in uchar.h in C2X mode or when the 
  _GNU_SOURCE macro is defined and the C++20 __cpp_char8_t feature test macro 
  is not defined (if __cpp_char8_t is defined, then char8_t is a builtin type). 
The functions arc4random, arc4random_buf, and arc4random_uniform have been
  added.  The functions wrap getrandom and/or /dev/urandom to return high- 
  quality randomness from the kernel. 
Support for LoongArch running on Linux has been added.  This port requires
  as least binutils 2.38, GCC 12, and Linux 5.19.  Currently only hard-float 
  ABI is supported: 
    - loongarch64-linux-gnu 
  The LoongArch ABI is 64-bit little-endian. 
Deprecated and removed features, and other changes affecting compatibility: 
Support for prelink will be removed in the next release; this includes
  removal of the LD_TRACE_PRELINKING, and LD_USE_LOAD_BIAS, environment 
  variables and their functionality in the dynamic loader. 
The Linux kernel version check has been removed along with the
  LD_ASSUME_KERNEL environment variable.  The minimum kernel used to built 
  glibc is still provided through NT_GNU_ABI_TAG ELF note and also printed 
  when libc.so is issued directly. 
On Linux, The LD_LIBRARY_VERSION environment variable has been removed.
The following bugs are resolved with this release: 
  [14932] dynamic-link: dlsym(handle, "foo") and dlsym(RTLD_NEXT, "foo") 
    return different result with versioned "foo" 
  [16355] libc: syslog.h's SYSLOG_NAMES namespace violation and utter 
    mess 
  [23293] dynamic-link: aarch64: getauxval is broken when run as ld.so 
    ./exe and ld.so adjusts argv on the stack 
  [24595] nptl: [2.28 Regression]: Deadlock in atfork handler which 
    calls dlclose 
  [25744] locale: mbrtowc with Big5-HKSCS returns 2 instead of 1 when 
    consuming the second byte of certain double byte characters 
  [25812] stdio: Libio vtable protection is sometimes only partially 
    enforced 
  [27054] libc: pthread_atfork handlers that call pthread_atfork 
    deadlock 
  [27924] dynamic-link: ld.so: Support DT_RELR relative relocation 
    format 
  [28128] build: declare_symbol_alias doesn't work for assembly codes 
  [28566] network: getnameinfo with NI_NOFQDN is not thread safe 
  [28752] nss: Segfault in getpwuid when stat fails 
  [28815] libc: realpath should not copy to resolved buffer on error 
  [28828] stdio: fputwc crashes 
  [28838] libc: FAIL: elf/tst-p_align3 
  [28845] locale: ld-monetary.c should be updated to match ISO C and 
    other standards. 
  [28850] libc: linux: __get_nprocs_sched reads uninitialized memory 
    from the stack 
  [28852] libc: getaddrinfo leaks memory with AI_ALL 
  [28853] libc: tst-spawn6 changes current foreground process group 
    (breaks test isolation) 
  [28857] libc: FAIL: elf/tst-audit24a 
  [28860] build: --enable-kernel=5.1.0 build fails because of missing 
    __convert_scm_timestamps 
  [28865] libc: linux: _SC_NPROCESSORS_CONF and _SC_NPROCESSORS_ONLN are 
    inaccurate without /sys and /proc 
  [28868] dynamic-link: Dynamic loader DFS algorithm segfaults on 
    missing libraries 
  [28880] libc: Program crashes if date beyone 2038 
  [28883] libc: sysdeps/unix/sysv/linux/select.c: __select64 
    !__ASSUME_TIME64_SYSCALLS && !__ASSUME_PSELECT fails on Microblaze 
  [28896] string: strncmp-avx2-rtm and wcsncmp-avx2-rtm fallback on non- 
    rtm variants when avoiding overflow 
  [28922] build: The .d dependency files aren't always generated 
  [28931] libc: hosts lookup broken for SUCCESS=CONTINUE and 
    SUCCESS=MERGE 
  [28936] build: nm: No such file 
  [28950] localedata: Add locale for ISO code "tok" (Toki Pona) 
  [28953] nss: NSS lookup result can be incorrect if function lookup 
    clobbers errno 
  [28970] math: benchtest: libmvec benchmark doesn't build with make 
    bench. 
  [28991] libc: sysconf(_SC_NPROCESSORS_CONF) should read 
    /sys/devices/system/cpu/possible 
  [28993] libc: closefrom() iterates until max int if no access to 
    /proc/self/fd/ 
  [28996] libc: realpath fails to copy partial result to resolved buffer 
    on ENOENT and EACCES 
  [29027] math: [ia64] fabs fails with sNAN input 
  [29029] nptl: poll() spuriously returns EINTR during thread 
    cancellation and with cancellation disabled 
  [29030] string: GLIBC 2.35 regression - Fortify crash on certain valid 
    uses of mbsrtowcs (*** buffer overflow detected ***: terminated) 
  [29062] dynamic-link: Memory leak in _dl_find_object_update if object 
    is promoted to global scope 
  [29069] libc: fstatat64_time64_statx wrapper broken on MIPS N32 with 
    -D_FILE_OFFSET_BITS=64 and -D_TIME_BITS=64 
  [29071] dynamic-link: m68k: Removal of ELF_DURING_STARTUP optimization 
    broke ld.so 
  [29097] time: fchmodat does not handle 64 bit time_t for 
    AT_SYMLINK_NOFOLLOW 
  [29109] libc: posix_spawn() always returns 1 (EPERM) on clone() 
    failure 
  [29141] libc: _FORTIFY_SOURCE=3 fail for gcc 12/glibc 2.35 
  [29162] string: [PATCH] string.h syntactic error: 
    include/bits/string_fortified.h:110: error: expected ',' or ';' 
    before '__fortified_attr_access' 
  [29165] libc: [Regression] broken argv adjustment 
  [29187] dynamic-link: [regression] broken argv adjustment for nios2 
  [29193] math: sincos produces a different output than sin/cos 
  [29197] string: __strncpy_power9() uses uninitialised register vs18 
    value for filling after \0 
  [29203] libc: daemon is not y2038 aware 
  [29204] libc: getusershell is not 2038 aware 
  [29207] libc: posix_fallocate fallback implementation is not y2038 
    aware 
  [29208] libc: fpathconf(_PC_ASYNC_IO) is not y2038 aware 
  [29209] libc: isfdtype is not y2038 aware 
  [29210] network: ruserpass is not y2038 aware 
  [29211] libc: __open_catalog is not y2038 aware 
  [29213] libc: gconv_parseconfdir is not y2038 aware 
  [29214] nptl: pthread_setcanceltype fails to set type 
  [29225] network: Mistyped define statement in socket/sys/socket.h in 
    line 184 
  [29274] nptl: __read_chk is not a cancellation point 
  [29279] libc: undefined reference to `mbstowcs_chk' after 
    464d189b9622932a75302290625de84931656ec0
  [29304] libc: mq_timedreceive does not handle 64 bit syscall return 
    correct for !__ASSUME_TIME64_SYSCALLS
  [29403] libc: st_atim, st_mtim, st_ctim stat struct members are 
    missing on microblaze with largefile 
Release Notes 
============= 
https://sourceware.org/glibc/wiki/Release/2.36
Contributors 
============ 
This release was made possible by the contributions of many people. 
The maintainers are grateful to everyone who has contributed 
changes or bug reports.  These include: 
=Joshua Kinard 
Adhemerval Zanella 
Adhemerval Zanella Netto 
Alan Modra 
Andreas Schwab 
Arjun Shankar 
Arnout Vandecappelle (Essensium/Mind) 
Carlos O'Donell 
Cristian Rodríguez 
DJ Delorie 
Danila Kutenin 
Darius Rad 
Dmitriy Fedchenko 
Dmitry V. Levin 
Emil Soleyman-Zomalan 
Fangrui Song 
Florian Weimer 
Gleb Fotengauer-Malinovskiy 
Guilherme Janczak 
H.J. Lu 
Ilyahoo Proshel 
Jason A. Donenfeld 
Joan Bruguera 
John David Anglin 
Jonathan Wakely 
Joseph Myers 
José Bollo 
Kito Cheng 
Maciej W. Rozycki 
Mark Wielaard 
Matheus Castanho 
Max Gautier 
Michael Hudson-Doyle 
Nicholas Guriev 
Noah Goldstein 
Paul E. Murphy 
Raghuveer Devulapalli 
Ricardo Bittencourt 
Sam James 
Samuel Thibault 
Sergei Trofimovich 
Siddhesh Poyarekar 
Stafford Horne 
Stefan Liebler 
Steve Grubb 
Su Lifan 
Sunil K Pandey 
Szabolcs Nagy 
Tejas Belagod 
Tom Coldrick 
Tom Honermann 
Tulio Magno Quites Machado Filho 
WANG Xuerui 
Wangyang Guo 
Wilco Dijkstra 
Xi Ruoyao 
Xiaoming Ni 
Yang Yanchao 
caiyinyu

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