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glibc

The GNU C library.

Other Activity This Week

Fix iseqsig for _FloatN and _FloatNx in C++ with GCC 13
Joseph Myers: With GCC 13, _FloatN and _FloatNx types, when they exist, are distinct types like they are in C with GCC 7 and later, rather than typedefs for types such as float, double or long double. This breaks the templated iseqsig implementation for C++ in <math.h>, when used with types that were previously implemented as aliases.

Update _FloatN header support for C++ in GCC 13
Joseph Myers: GCC 13 adds support for _FloatN and _FloatNx types in C++, so breaking the installed glibc headers that assume such support is not present.

Recent Activity

Fix iseqsig for _FloatN and _FloatNx in C++ with GCC 13
Joseph Myers: With GCC 13, _FloatN and _FloatNx types, when they exist, are distinct types like they are in C with GCC 7 and later, rather than typedefs for types such as float, double or long double. This breaks the templated iseqsig implementation for C++ in <math.h>, when used with types that were previously implemented as aliases.

Update _FloatN header support for C++ in GCC 13
Joseph Myers: GCC 13 adds support for _FloatN and _FloatNx types in C++, so breaking the installed glibc headers that assume such support is not present.

riscv: Consolidate the libm-test-ulps
Alistair Francis: Both RV32 and RV64 should have the same libm-test-ulps, so consolidate them into a single file.

nss: Implement --no-addrconfig option for getent
Florian Weimer: The ahosts, ahostsv4, ahostsv6 commands unconditionally pass AI_ADDRCONFIG to getaddrinfo, which is not always desired.

hurd: Make readlink* just reopen the file used for stat
Samuel Thibault: 9e5c991106cb ("hurd: Fix readlink() hanging on fifo") separated opening the file for the stat call from opening the file for the read call.

LoongArch: Add soft float support
caiyinyu

resolv: Add new tst-resolv-invalid-cname
Florian Weimer: This test checks resolution through CNAME chains that do not contain host names (bug 12154).

resolv: Add the __ns_samebinaryname function
Florian Weimer: During packet parsing, only the binary name is available.

resolv: Add tst-resolv-byaddr for testing reverse lookup
Florian Weimer

Detect ld.so and libc.so version inconsistency during startup
Florian Weimer: The files NEWS, include/link.h, and sysdeps/generic/ldsodefs.h contribute to the version fingerprint used for detection.

glibc Release Tags

Remove left over LD_LIBRARY_VERSION usages
Adhemerval Zanella: The environment variable was removed by d2db60d8d830ef68c8d20a77ac3572d610aa40b1.

linux: Add process_mrelease
Adhemerval Zanella: Added in Linux 5.15 (884a7e5964e06ed93c7771c0d7cf19c09a8946f1), the new syscalls allows a caller to free the memory of a dying target process. Checked on x86_64-linux-gnu.

Remove kernel version check
Adhemerval Zanella: The kernel version check is used to avoid glibc to run on older kernels where some syscall are not available and fallback code are not enabled to handle graciously fail.

Open master branch for glibc 2.36 development
Carlos O'Donell

Open master branch for glibc 2.35 development
Carlos O'Donell

Open master branch for glibc 2.34 development
Adhemerval Zanella

Prepare for glibc 2.33 release
Adhemerval Zanella: Update version.h, features.h, and ChangeLog.old/ChangeLog.22.

Open master branch for glibc 2.33 development
Carlos O'Donell: Happy hacking!

Generate ChangeLog.old/ChangeLog.20 for 2.31
Siddhesh Poyarekar: We're ready to tag!

Open master for 2.32 development
Siddhesh Poyarekar: happy hacking!

Most Popular This Year

elf: Remove prelink support
Adhemerval Zanella: Prelinked binaries and libraries still work, the dynamic tags DT_GNU_PRELINKED, DT_GNU_LIBLIST, DT_GNU_CONFLICT just ignored (meaning the process is reallocated as default).

nptl: Add rseq registration
Florian Weimer: The rseq area is placed directly into struct pthread.

Replace --enable-static-pie with --disable-default-pie
Siddhesh Poyarekar: Build glibc programs and tests as PIE by default and enable static-pie automatically if the architecture and toolchain supports it. Also add a new configuration option --disable-default-pie to prevent building programs as PIE. Only the following architectures now have PIE disabled by default because they do not work at the moment.

elf: Add _dl_find_object function
Florian Weimer: It can be used to speed up the libgcc unwinder, and the internal _dl_find_dso_for_object function (which is used for caller identification in dlopen and related functions, and in dladdr). _dl_find_object is in the internal namespace due to bug 28503.

malloc: Add Huge Page support for mmap
Adhemerval Zanella: With the morecore hook removed, there is not easy way to provide huge pages support on with glibc allocator without resorting to transparent huge pages.

linux: Add fanotify_mark C implementation
Adhemerval Zanella: Passing 64-bit arguments on syscalls.list is tricky: it requires to reimplement the expected kernel abi in each architecture.

Initial support for GNU_PROPERTY_1_NEEDED
H.J. Lu

Update kernel version to 5.16 in tst-mman-consts.py
Joseph Myers: This patch updates the kernel version in the test tst-mman-consts.py to 5.16.

linux: Add prlimit64 C implementation
Adhemerval Zanella: The LFS prlimit64 requires a arch-specific implementation in syscalls.list.

Add --with-rtld-early-cflags configure option
Florian Weimer

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