GNU Tools Weekly News Week 14 (November 30, 2025)

Release updates for GNU toolchain:
* GDB 17.1 release update -- 2025-11-29
* https://inbox.sourceware.org/gdb-patches/aSwsj%[email protected]/T/#u

General/big GNU toolchain news (including sourceware news):
* The GCC Steering Committee has a wiki page detailing their mission
and current requests are listed
** https://gcc.gnu.org/wiki/gcc-steering-committee
* GDB: Christina Schimpe added as a x86-64 and i386 maintainer
* Office Hours for the GNU Toolchain was held Thursday 2025-11-27
* Notes can be found at https://gcc.gnu.org/wiki/OfficeHours
* Next office hours is 2025-12-18 @ 1100h EST5EDT
* Sourceware HW service migration successfully happened Friday 2025-11-28
* Please report if you notice anything wrong to @sourceware

GCC commits:
* The Algol 68 front-end
* Change the default C++ dialect to gnu++20
* c: Add _Maxof and _Minof operators
* New g++ option --compile-std-module to compile the std module
without any extra invocation of gcc
* RISC-V profiles support was removed from GCC 16 due to issues
* aarch64: Enable parsing of user-provided AArch64 CPU tuning parameters
* aarch64: Better code generation for SVE/Adv. SIMD early break vectorization
* libstdc++: Implement LWG 4366 for std::expected comparisons
* libstdc++: Implement LWG 4370 for std::optional comparisons
* gccrs: 12 commit sync
* ada: 15 commit sync
* RISC-V: Add Andes 23 and 45 series pipeline descriptions
* RISC-V: Add SpacemiT extension xsmtvdot

GCC discussion:
* decimal floating point
** Moved from glibc discussion
* https://inbox.sourceware.org/gcc/CAH6e[email protected]/T/#m2e0d4dd4a417da002fbbc32a50486d1ae6f9d1ca
* Refining _DEFAULT_SOURCE and _GNU_SOURCE
** Also glibc discussion
* https://inbox.sourceware.org/gcc/8926a[email protected]/T/#m796bfe7a1c918d55a87995df11747975d71fcba2

GCC bugzilla stats
* 113 new issues filed
* 97 issues closed

glibc commits:
* math: New generic fmaf and fma implementation
** Also https://zatrazz.substack.com/p/the-recent-glibc-fma-optimization
* math: Sync atanh from CORE-MATH
* Define C23 header version macros
* stdlib: Remove longlong.h (usage and header)

glibc discussion:
* See gcc discussion too
* glibc SFrame support for newer versions
* https://inbox.sourceware.org/libc-alpha/[email protected]/T/
* Is hppa64-linux-gnu an supported target?
* https://inbox.sourceware.org/libc-alpha/CAMe9rOqVupum3dknCOpTNYgmBn6=yHVgCjh+kARqph5ezCWXrw@mail.gmail.com/T/

binutils/gdb commits:
* Obsolete support for Solaris < 10

gdb discussion:
* What bugs/issues should I work on?
* https://inbox.sourceware.org/gdb/CAB9P[email protected]/T/#u

https://inbox.sourceware.org/gcc/CAHt=[email protected]/

GNU Tools Weekly News Update Week 8 (October 19, 2025)

General/big GNU toolchain news (including sourceware news):
* notes from Sourceware Open Office was held on Friday October 10th
** https://inbox.sourceware.org/gcc/20251[email protected]/

GCC discussion:
* New GCC maintainers/reviews
** Tamar Christina is co-maintainer of the vectorizer
*** https://inbox.sourceware.org/gcc/CAGWv[email protected]/T/#u
** Robin Dapp is a reviewer of the vectorizer
*** https://inbox.sourceware.org/gcc/CAGWv[email protected]/T/#u
** tree-if-conv.cc is officially part of the vectorizer maintainership area
*** https://inbox.sourceware.org/gcc/CAGWv[email protected]/T/#u
* Patches for adding Algol 68 to GCC were posted
** https://inbox.sourceware.org/gcc-patches/[email protected]/T/#t
* How to write/read tree contains ssa_name in lto
** https://inbox.sourceware.org/gcc/CAPt2[email protected]/
** Turned into a discussion on how to handle recording if 2 memory allocations happen how to mark if one is loaded from; the other does not trap too
* plans for gcobol 16
** https://inbox.sourceware.org/gcc/20251[email protected]/
* Discussion around patches from the sourceware forge
** https://inbox.sourceware.org/gcc/CAPS5[email protected]/T/#m86a67388fed189739518ee1314f3e8736bbf0833
* Add btf_decl_tag and btf_type_tag C attributes for GCC v11 of the patches
** https://inbox.sourceware.org/gcc-patches/[email protected]/T/#m0812b326872ebae48b935274726e5ec1f1a18b46

GCC commits:
* Enable constant propagation to OpenMP kernels
** New first time contributor
** big improvement for openmp
* Allow target to chose address-space for artificial rodata
** Improves AVR target size requirements when dealing with conversion of switch tables to constant lookup tables and CRC lookup tables
** https://gcc.gnu.org/cgit/gcc/commit/?h=trunk&id=e347e2b81ac7daa7382c611a62d54ec0b761bee8
** 7 years from the initial patch to the current pushed one
* Initial support for Intel Wildcat Lake processors
* Implement P1494 and P3641 Partial program correctness (c++ and library)
* Enable runtime thread detection with -ftree-parallelize-loops
* libstdc++: Implement P2835R7 Expose std::atomic_ref's object address

GCC bugzilla stats
* 77 new issues filed
* 60 issues closed

glibc commits:
* Implement C23 memalignment
* aarch64: clear ZA state of SME before clone and clone3 syscalls

glibc discussion:
* compiling with clang patches posted
** https://inbox.sourceware.org/libc-alpha/[email protected]/

gdb/binutils commits:
* binutils: Add a position statement about LLM generated content
** https://sourceware.org/cgit/binutils-gdb/commit/?id=c0316a54b489d68e30de718aee69ab441799aad2

binutils discussion:
* continued GNU Tools Cauldron SFrame talk notes
** https://inbox.sourceware.org/binutils/[email protected]/

GNU Tools Weekly News Update Week 6  (October 6, 2025)

https://inbox.sourceware.org/gcc/CAHt=[email protected]/T/#u

Summary below:

General/big GNU toolchain news (including sourceware news):
* Last week was the GNU tools 2025 cauldron
** Will post and update when the videos and pdfs on cauldron available
** Thanks again to the host (Faculty of Engineering of the University of Porto) and organizers for a wonderful and productive cauldron

GCC discussion:
* Followup from the cauldron about  "bugzilla keyword for beginner issues to work on"
** https://inbox.sourceware.org/gcc/0ef5e[email protected]/T/#m99b5395361ece1d1c3f294e2d5b1582e6d11a39b

* Link to the GCC Steering Committee overview on the wiki was posted
** https://gcc.gnu.org/wiki/gcc-steering-committee

* How to build a cross compiler for NVPTX backend
** The instructions can be found at https://gcc.gnu.org/wiki/Offloading#For_Nvidia_PTX:

* `Regarding vectorize pattern recognition for [generic] vector [extension] code`
** https://inbox.sourceware.org/gcc/pro8s[email protected]/T/#me17225d58ef3e998e5897ebd6c9c0bc3b344f49e

GCC commits:
* Removal of the fold_builtin (fab) pass
** Merged functionality into other passes
* Function multi-version (FMV) support was improved to now follow ARM's ACLE
** Support was added to the C front-end also
** AARCH64 support is no longer beta
* libstdc++: Implement Philox Engine, c++26 P2075R6
** First time contributor; https://github.com/1nfocalypse
* Improvements for AutoFDO and profiling in general
* toplevel: unify the GCC and GDB/binutils .editorconfig files
* C: Add -Wmultiple-parameter-fwd-decl-lists new warning
* C++: Implement C++26 P2795R5 - Erroneous behavior for uninitialized reads
* Ada: Availability of the Extended_Access aspect.
** https://gcc.gnu.org/onlinedocs/gnat_rm/Aspect-Extended_005fAccess.html

GCC bugzilla stats (includes previous week too):
* 149 new issues filed
* 113 issues closed

glibc commits:
* C23: Implement memset_explicit
* AArch64: Implement AdvSIMD and SVE log2p1(f) and log10p1(f) routines
* C23: Add once_flag, ONCE_FLAG_INIT and call_once to stdlib.h
* Optimize flt-32 and dbl-64 remainder implementation

glibc/binutils discussions:
* LLM-generated or assisted contributions
** https://inbox.sourceware.org/libc-alpha/[email protected]/T/#m150c261c0efeec12da4b0b193ba79f45ddbb9d37
** https://inbox.sourceware.org/binutils/[email protected]/T/#mb0cdf5c6e1a626a19a1470137e5a731058064cce

gdb/binutils commits:
* aarch64: Update and fix some of the system registers
* Add the ability to find the clang LTO plugin with ar/ld/ranlib.
* Many gdb cleanups

gdb discussion:
* gdb does not stop at printf for ppc
** https://inbox.sourceware.org/gdb/87wm5[email protected]/T/#m6b827501a18f4b1006fcfe390815e818107a1c47

Our engineers will be presenting at this year’s GNU Tools Cauldron, bringing expertise in both glibc math optimizations and open-source community processes.

Here’s the 2 key sessions you don’t want to miss:

→ Adhemerval Zanella’s talk on Latest glibc math improvements and the future (Sep 27, 9 AM GMT+1)
→ A Q&A session with Maxim Kuvyrkov on Process and Barriers (Sep 28, 4PM GMT+1)

Full schedule can be found here: https://lnkd.in/eWvYantU

#Linaro #OpenSource #GNUToolCauldron #Tech

GNU Tools Weekly News Update Week 3  (September 14, 2025)

General/big GNU toolchain news (including sourceware news):
The GNU tools Cauldron 2025 schedule is now live: https://conf.gnu-tools-cauldron.org/opo25/schedule/
Sourceware Together; Open Office was held on Friday September 12th
gccrs August 2025 Monthly report: https://inbox.sourceware.org/gcc/1a8ba[email protected]/T/#u

GCC discussion:
* Should the forge-bot send patches to the gcc-patches mailing list? https://inbox.sourceware.org/overseers/[email protected]/T/
* Attribute for custom memset function: https://inbox.sourceware.org/gcc/CAH6e[email protected]/T/
* RISC-V nightly performance testing of GCC on SPEC CPU 2017: https://inbox.sourceware.org/gcc/4ED89[email protected]/T/
* Clarification about RTL shifts semantics: https://inbox.sourceware.org/gcc/87y0q[email protected]/T/

GCC commits:
* Improve the malloc+memset->calloc optimization (not doing as much and doing more)
* C++26: libstdc++: Implement constant_wrapper, cw from P2781R9.
* C++26: libstdc++: Adjust span/mdspan CTAD for P2781R9.
* C++26: libstdc++: Apply LWG4351 to CTAD of span/mdspan.
* c++: Fix mangling of _Float16 template args
* c, c++: Allow &__real__ static_var in constant expressions
* c++20: Change mangling of Intel/Motorola extended long double literals ** ABI CHANGE**
* c: Warn when returning nested functions that require a non-local context.
* new fabs(a+0.0) -> fabs(a) pattern (From a first time contributor)
* c2y:: Implement N3517 array subscripting without decay
* ~70 commits to the Ada front-end

GCC bugzilla stats:
* 97 new issues filed
* 64 issues closed

glibc commits:
* Fix build for -Os for a few targets
*  AArch64: add optimised strspn/strcspn
* Use builtin atomics more
* benchtests: Add lgamma, asinh, and acosh benchmarks

gdb/binutils discussion:
* gdb XML type for SME ZA storage: https://inbox.sourceware.org/gdb/CANnS[email protected]/T/
* GDB 17 pre-release (first prelease for GDB 17 before RCs) for testing: https://inbox.sourceware.org/gdb-patches/[email protected]/T/
* Removal of stabs debug info support in GDB: https://inbox.sourceware.org/gdb-patches/[email protected]/T/