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glibc

The GNU C library.

Other Activity This Week

Add system-wide tunables: manual
DJ Delorie: Document the syntax and operation.

Add system-wide tunables: Filters
DJ Delorie: Add support for [proc:*] syntax where * matches /proc/self/exe (fallback: argv[0] unless AT_SECURE).

Add system-wide tunables: Apply tunables part
DJ Delorie: Load ld.so.cache and fetch the tunables extension.

Add system-wide tunables: cache ld.so.cache
DJ Delorie: The purpose of this change is twofold: 1.

Add system-wide tunables: ldconfig part
DJ Delorie: Adds support for reading /etc/tunables.conf The file contains one line per tunable, like this: glibc.foo.bar=14 glibc.malloc.more=0 Additionally, each line can be prefixed with a single word or character that controls overridability by the GLIBC_TUNABLES env var: overridable glibc.foo=0 +glibc.foo=0 ^ May be overridden (the default) nonoverridable glibc.foo=0-glibc.foo=0 ^ May not be overridden The tunable cache format allows for a filter to be assigned to each tunable, to be used at program start to decide if a tunable applies to that program.

Recent Activity

Add system-wide tunables: manual
DJ Delorie: Document the syntax and operation.

Add system-wide tunables: Filters
DJ Delorie: Add support for [proc:*] syntax where * matches /proc/self/exe (fallback: argv[0] unless AT_SECURE).

Add system-wide tunables: Apply tunables part
DJ Delorie: Load ld.so.cache and fetch the tunables extension.

Add system-wide tunables: cache ld.so.cache
DJ Delorie: The purpose of this change is twofold: 1.

Add system-wide tunables: ldconfig part
DJ Delorie: Adds support for reading /etc/tunables.conf The file contains one line per tunable, like this: glibc.foo.bar=14 glibc.malloc.more=0 Additionally, each line can be prefixed with a single word or character that controls overridability by the GLIBC_TUNABLES env var: overridable glibc.foo=0 +glibc.foo=0 ^ May be overridden (the default) nonoverridable glibc.foo=0-glibc.foo=0 ^ May not be overridden The tunable cache format allows for a filter to be assigned to each tunable, to be used at program start to decide if a tunable applies to that program.

nss: Remove --enable-static-nss configure option
Michael Ford: Since the NSS reorganization in glibc 2.33 the --enable-static-nss option no longer changes the build: the files and dns services are built into libc unconditionally, and there is no longer any mechanism to bake the remaining services into libc.a.

ppc64le: Restore optimized memchr for power10 [BZ #34300]
Sachin Monga: Restore the POWER10 memchr implementation reverted in commit a7877bb6685300f159fa095c9f50b22b112cddb8 [BZ #33059], addressing the actual cause: The non-volatile vector register v20 used as the zero vector (M_VREG_ZERO) is replaced with the volatile register v17.

AArch64: Update SHARED-FILES with files from Arm Optimized-Routines
Pierre Blanchard: Adds lists for math.

riscv: Add RVV memmove for both multiarch and non-multiarch builds
Yao Zihong: This patch adds an RVV-optimized implementation of memmove for RISC-V and enables it for both multiarch (IFUNC) and non-multiarch builds. The implementation integrates Hau Hsu's 2023 RVV work under a unified ifunc-based framework.

elf: Support THP segment load with madvise enabled THP
H.J. Lu: The current THP segment load approach works only when THP is enabled with always in the kernel.

glibc Release Tags

version.h: Increase version number
Andreas K. Hüttel

aarch64: update NEWS for 2.43 release
Yury Khrustalev

Check if linker supports -Wl,--undefined-version
Adhemerval Zanella: Although binutils has supported --no-undefined-version for a long timei (319416359200 back in 2002), --undefined-version was only added more recently (27fb6a1a7fcd on 2.40).

Create ChangeLog.old/ChangeLog.31
Andreas K. Hüttel

Increase version to 2.41.9000, add new section to NEWS
Andreas K. Hüttel: ### diff --git a/NEWS b/NEWS index b11422b060..e2e40e141c 100644 --- a/NEWS +++ b/NEWS @@ -5,6 +5,33 @@ See the end for copying conditions. Please send GNU C library bug reports via <

Create ChangeLog.old/ChangeLog.30
Andreas K. Hüttel

Increase version number to 2.40.9000
Andreas K. Hüttel

Add ChangeLog file
Andreas K. Hüttel

Open master branch for glibc 2.39 development
Andreas K. Hüttel

NEWS: Fix typos
Andreas K. Hüttel

Most Popular In The Past Month

riscv: Add RVV memcmp for both multiarch and non-multiarch builds
Yao Zihong: This patch adds an RVV-optimized implementation of memcmp for RISC-V and enables it for both multiarch (IFUNC) and non-multiarch builds. The implementation integrates Hau Hsu's 2023 RVV work under a unified ifunc-based framework.

math: Sync acosh with CORE-MATH 887cab6f
Adhemerval Zanella: It syncs with CORE-MATH commit 887cab6f.

Consolidate the C pointer guard and align the assembly implementations
Adhemerval Zanella: The per-architecture pointer_guard.h files all implemented some variant of C PTR_MANGLE/PTR_DEMANGLE: the i386 and x86_64 versions did an exclusive-or by the guard followed by a rotate left by 2 * sizeof (uintptr_t) + 1 bits (9 on 32-bit, 17 on 64-bit), while the other targets did the exclusive-or only.

elf: Support THP segment load with madvise enabled THP
H.J. Lu: The current THP segment load approach works only when THP is enabled with always in the kernel.

Add system-wide tunables: ldconfig part
DJ Delorie: Adds support for reading /etc/tunables.conf The file contains one line per tunable, like this: glibc.foo.bar=14 glibc.malloc.more=0 Additionally, each line can be prefixed with a single word or character that controls overridability by the GLIBC_TUNABLES env var: overridable glibc.foo=0 +glibc.foo=0 ^ May be overridden (the default) nonoverridable glibc.foo=0-glibc.foo=0 ^ May not be overridden The tunable cache format allows for a filter to be assigned to each tunable, to be used at program start to decide if a tunable applies to that program.

Add system-wide tunables: Filters
DJ Delorie: Add support for [proc:*] syntax where * matches /proc/self/exe (fallback: argv[0] unless AT_SECURE).

riscv: Add RVV memmove for both multiarch and non-multiarch builds
Yao Zihong: This patch adds an RVV-optimized implementation of memmove for RISC-V and enables it for both multiarch (IFUNC) and non-multiarch builds. The implementation integrates Hau Hsu's 2023 RVV work under a unified ifunc-based framework.

Add system-wide tunables: cache ld.so.cache
DJ Delorie: The purpose of this change is twofold: 1.

Enable the pointer guard in the dynamic loader
Adhemerval Zanella: i386, powerpc, s390, sh and sparc fell back to the generic no-op pointer_guard.h in ld.so, so the loader's own setjmp/longjmp and mangled function pointers were left unprotected (the other targets already mangle in rtld).

Add system-wide tunables: Apply tunables part
DJ Delorie: Load ld.so.cache and fetch the tunables extension.

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