GNU Tools Weekly News Week 34 (April 19, 2026) Release updates for GNU toolchain: * gcc 16.0 regression status (note this is not official numbers, it might be off by a few) * great push from developers last week * P1: 2 -8 * P1+P2+P3 total: 754 -12 * (non-GNU but still toolchain related) valgrind 3.27.0 * RC1+RC2 was done last week * The final 3.27.0 release is scheduled for Mon Apr 20.
GNU toolchain conference news: * FOSSY 2026 toolchain track North America, Aug 6-9 * https://inbox.sourceware.org/gcc/[email protected]/T/ * Call for Proposals: https://2026.fossy.ca/call-for-proposals/ * GNU Tools Cauldron 2026 Call for Proposals is open (still soft launch) * Fri-Sun, October 2-4, 2026 at Charles University in Prague, Czechia * https://gcc.gnu.org/wiki/cauldron2026 * https://conf.gnu-tools-cauldron.org/prg26/cfp General/big GNU toolchain news (including sourceware news): * The GNU libc atanh is correctly rounded * https://inbox.sourceware.org/libc-alpha/p9u0bjfl36v1.fsf@thym/T/#u * https://inria.hal.science/hal-05591661 * gccrs March 2026 Monthly report * https://rust-gcc.github.io/2026/04/13/2026-03-monthly-report.html * Office Hours for the GNU Toolchain were held last Friday * Meeting notes can be found at https://gcc.gnu.org/wiki/OfficeHours * forge.sourceware.org has been upgraded to forgejo v15.0.0 * elfutils 0.195 released * https://inbox.sourceware.org/elfutils-devel/cajdtp-qok4vinzvrr28wgkccqrfh0iazstid8c7nbpdhrpz...@mail.gmail.com/ * Peter0x44 posted a blog entry about C++ Ia64 ABI vtables * https://peter0x44.github.io/posts/vtables-itanium-abi/ GCC easy issue to tackle of the week: * some force_gimple_operand_gsi in tree-strlen.cc should be replaced by gimple_build/gimple_convert * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122989 * Note this is different from previous weeks; this is cleanup of GCC sources rather than missed optimization * Reach out to Andrea Pinski <[email protected]> for mentoring on this issue. GCC commits: * note most of the commits from now until the release are bug fixes which have not been listed here normally * GCC rust sync of 43 patch set * aarch64: Add RTL pass to narrow 64-bit GP reg writes to 32-bit * https://gcc.gnu.org/cgit/gcc/commit/?id=f9f744360e6d7f5e86d39cd1f7df8b3dcf71863c * AArch64: Add -mcpu=armagicpu definition * https://gcc.gnu.org/cgit/gcc/commit/?id=0f5f728854d2ea93e6806a8632c04383502b0386 * middle-end: disable CRC pass when -Os and the target does not have CRC optabs [PR124900] * https://gcc.gnu.org/cgit/gcc/commit/?id=26e88fe809de0f1a1812c99e2e0106afb03257b3 * nvptx: Support '-march=sm_50' and '-mptx=4.0' * https://gcc.gnu.org/cgit/gcc/commit/?id=7584007b797620c22da6da9783b04eda873e5e7f * https://gcc.gnu.org/cgit/gcc/commit/?id=1b5948d7141b2651a48f73709d11dd253e1fa689 * libstdc++: Implement structured binding support for integer_sequence * https://gcc.gnu.org/cgit/gcc/commit/?id=6159bfcf8b5852417519cf4181bf0ff8907ac0ca * libstdc++: Runtime fallback for constant_wrapper subscript and call operators. * https://gcc.gnu.org/cgit/gcc/commit/?id=9c0a9b700e5b8c1fbd09cfab7f8d268195aeebfe * c++: Implement CWG3149 - Rvalues in destructuring expansion statements * https://gcc.gnu.org/cgit/gcc/commit/?id=96f4731b0737638441df699bf18587ed9cc6c364 * c++, libstdc++: Implement LWG4483 - Multidimensional arrays are not supported by meta::reflect_constant_array and related functions * https://gcc.gnu.org/cgit/gcc/commit/?id=2cdd7831e31601c640bec01a1240cbcb6a72b5c4 * c++: Implement CWG3149 - Rvalues in destructuring expansion statements * https://gcc.gnu.org/cgit/gcc/commit/?id=96f4731b0737638441df699bf18587ed9cc6c364 GCC discussion: * GSoC 2026 project discussions from participates * Policy on use of LLM tools and bug fixes * https://inbox.sourceware.org/gcc/cah6ehdrc2zwf96tmvfg8spn_g6e8l-vvan0kopw9tttzdo9...@mail.gmail.com/T/#m4365c662ccc0af15fe987fdd87556fb842e62d2a * Working Group on policy: https://gcc.gnu.org/wiki/working-group-ai-policy * [RFC] redesigning callbacks for make_forwarder_block * https://inbox.sourceware.org/gcc/calvbmccxyfm5njhgct-pxtdblt_zubywbtu03grwbzgeczg...@mail.gmail.com/T/#m96cbfb9f9e483fa1aca51cbc200767714b05a801 * Outcome approved patch: https://inbox.sourceware.org/gcc-patches/CAFiYyc2NF_kbPARS30w3zdjvqUFeDc2k8wDGtfQGb=m_ah-...@mail.gmail.com/T/ * RFC: Another pass_late_combine after pass_reorder_blocks? * https://inbox.sourceware.org/gcc/CAFULd4aDCK=rc8j7o87E7MZNOoDS9HX3=w2h0HvBfxEbki1D=a...@mail.gmail.com/T/ * Glob to match bare-metal SuperH target triple in config.gcc seems wrong (sh*-superh-elf)? * https://inbox.sourceware.org/gcc/[email protected]/T/#m52db2fb40c67cdc49584a924bcf3381ed7fecaaa GCC bugzilla stats * 72 new issues filed * 99 issues closed glibc commits: * elf: Align large load segments to PMD huge page size for THP and tunable * https://sourceware.org/cgit/glibc/commit/?id=2f9fc3fba6562c888204159c09d654cb3499e38b * https://sourceware.org/cgit/glibc/commit/?id=f9933bf832d4ea4bb1b21db435e61324c05b7b10 * https://sourceware.org/cgit/glibc/commit/?id=88c3f481de92808499464fa7e2ac1e9fce9d649c * Enable by default for 64bit loongarch * https://sourceware.org/cgit/glibc/commit/?id=ef044cc6d79c5646b521569417da890154ea1813 glibc discussion: * glibc AI policy (continued) * binutils/gdb commits: * Add a "-O 0" option to the linker for a faster, but less effective link. * https://sourceware.org/cgit/binutils-gdb/commit/?id=4fe7dd9a10d15928834d8a20ec91f2b1436c8108 * gdb discussion: * binutils discussion: *
