GNU Tools Weekly News Week 55 (September 13, 2026) Sorry I didn't do this until now; family stuff going on.
Release updates for GNU toolchain: * GDB 18.1.0 update * Release didn't happen, some bugs came up; delayed until the 25th * https://inbox.sourceware.org/gdb-patches/[email protected]/ * GCC 13.5.0 was released * https://inbox.sourceware.org/gcc/[email protected]/ GNU toolchain conference reminders: * GNU Tools Cauldron 2026, Fri-Sun, October 2-4 (Prague, Czechia) * https://gcc.gnu.org/wiki/cauldron2026 * https://conf.gnu-tools-cauldron.org/prg26/cfp * Toolchains Track at LPC 2026, October 7th (Prague, Czechia) * https://lpc.events/event/20/abstracts/ General/big GNU toolchain news (including sourceware news): * gccrs August 2026 Monthly report * https://inbox.sourceware.org/gcc/[email protected]/ * Notes from Sourceware - Building Together, Fri 11, 15:00 UTC * https://inbox.sourceware.org/gcc/[email protected]/ * Implementation of GCC's Nested Functions (vs. C++ Lambdas) * https://uecker.codeberg.page/2026-09-05.html * Ghosts and Demons: Undefined Behavior in C2Y (Status 2026-08-23) * https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3957.pdf GCC easy issue to tackle of the week: * `a << CST >> CST` can be simplified into a if upper CST bits of a are known to be zero * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126644 * Reach out to Andrea Pinski <[email protected]> for mentoring on this issue. * Previous ones are listed on https://gcc.gnu.org/wiki/EasyIssuesOfTheWeek GCC commits: * https://gcc.gnu.org/r17-3967 ... r17-4211 - 245 commits * ifcvt: Handle arm-only diamond live-outs * https://gcc.gnu.org/r17-3970-g301afaab5b8eaf * middle-end: Improve bitreverse RTL expansion with AOP. * https://gcc.gnu.org/r17-3977-gfb21f1686938d6 * match/fold: support (a CMP b) OP (a CMP b) for more OPs * https://gcc.gnu.org/r17-4001-gbbc2517fe41307 https://gcc.gnu.org/r17-4000 https://gcc.gnu.org/r17-3999 * RISC-V: Rewrite vector FMA patterns using fma rtxes * https://gcc.gnu.org/r17-4002-gc44d962721818b * Cleanup some `build_int_cst (NULL_TREE` * https://gcc.gnu.org/r17-4008 r17-4009 r17-4010 * ranger: give loads from constant tables of floats a range * https://gcc.gnu.org/r17-4024-gc1b5260244cf53 * Recognize CLZ loop for signed non-negative values * https://gcc.gnu.org/r17-4047-ge90e0f66051d33 * https://gcc.gnu.org/r17-4191-g52ceb1698c9f46 * gccrs merge (43 commits) * https://gcc.gnu.org/r17-4130-g4d9b51c8cb1317 ... https://gcc.gnu.org/r17-4088-gb276fbcc9d8ad0 * phiopt/cselim: Support constants for cond_store_replacement_limited * https://gcc.gnu.org/r17-4133-g230d950810f378 * Add clobber parsing to the GIMPLE FE * https://gcc.gnu.org/r17-4148-g9ed526efc2f6ab * match.pd: fold A - MIN (B, C) to A + MAX (-B, -C) * https://gcc.gnu.org/r17-4209-g771f488a90f748 * match.pd: complete the branchless min and max folds * https://gcc.gnu.org/r17-4210-g9d734bb468e714 * rs6000: Add ABI and libgcc support for C23 _BitInt [PR117584] * https://gcc.gnu.org/r17-4163-g83998f47450c08 GCC discussion: * GCC bugzilla stats * 143 new issues filed * 129 issues closed binutils/gdb commits: * RISC-V: Support Zvabd version 0.9 * https://sourceware.org/cgit/binutils-gdb/commit/?id=720f87fd856c31aaf13bd264285fda97376f2535 * RISC-V: Add Sspmp extension support * https://sourceware.org/cgit/binutils-gdb/commit/?id=b16f10037c4814ab03416a4ab143337591881e2b * gdb discussion: * binutils discussion: * glibc commits: * glibc discussion: *
