GNU Tools Weekly News Week 53 (August 30, 2026)

GNU Tools Weekly News Week 53 (August 30, 2026)

[GNU Tools weekly via Gdb]

GNU Tools Weekly News Week 53 (August 30, 2026)
A start of the new year for the newsletter!

Release updates for GNU toolchain:
 * GDB 18.1.0 update
  * delayed until September 11th
  * https://inbox.sourceware.org/gdb-patches/87y0dvtz84.fsf@redhat.com/T/

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
  * cfp closes August 31st (tomorrow)
 * Toolchains Track at LPC 2026, October 7th (Prague, Czechia)
  * https://lpc.events/event/20/abstracts/

General/big GNU toolchain news (including sourceware news):
 * Sourceware Infrastructure news - AI scrapping and website throttling
  * https://inbox.sourceware.org/gcc/0475bd28feb9f78dcea1c13d6315aac79966ca53.camel@klomp.org/
 * Accuracy of Mathematical Functions (glibc)
  * https://inbox.sourceware.org/libc-alpha/p9u0wltelndm.fsf@thym/

GCC easy issue to tackle of the week:
 *  umax(a,b)==0 folding into a|b==0 gets in the way sometimes
  * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126880
  *  Reach out to Andrea Pinski <andrew.pinski@oss.qualcomm.com> for
mentoring on this issue.
 * Previous ones are listed on https://gcc.gnu.org/wiki/EasyIssuesOfTheWeek

GCC commits:
 * https://gcc.gnu.org/r17-3568 r17-3774-  207 commits
 * RISCV: Support -mcpu=native
  * https://gcc.gnu.org/r17-3578 https://gcc.gnu.org/r17-3577
https://gcc.gnu.org/r17-3577
 * RISCV: Add sifive-p550 and sifive-p870-d
  * https://gcc.gnu.org/r17-3579-g7ca5288cc68ff5
 * hoist invariants after unswitching
  * https://gcc.gnu.org/r17-3584-g66ed104db50c63
 * genmatch: Don't emit the ssa name checks for cond^
  * https://gcc.gnu.org/r17-3612-gf77f607c42df40
 * range: add VREL_EQ relation effect for div and mod
  * https://gcc.gnu.org/r17-3610-g7c25b09da5841c
  * Easy issue for week 50
 * phiopt: replicate conditionals over a PHI of comparisons
  * https://gcc.gnu.org/r17-3622-g804ff22702eca4
 * aarch64: Support FCCMP and FCCMPE for _Float16
  * https://gcc.gnu.org/r17-3628-g263ce2e907f722
 * libstdc++: optional: Treat _M_engaged as being assumed to be false
after the destructor
  * https://gcc.gnu.org/r17-3656-ge982f847aab9f7
 * aarch64: allow usage of zero reg for CRC32 instructions
  * https://gcc.gnu.org/r17-3684-g004a9da1bde785
 * c-family: honor explicit -Wstrict-aliasing under -fno-strict-aliasing
  * https://gcc.gnu.org/r17-3685-g39ba948f9b86e1
 * aarch64: Recognize vector permute patterns which can be optimized
as REV64+EXT
  * https://gcc.gnu.org/r17-3712-g4182cf11e1e3d2
 * c++: unshare RANGE_EXPR CONSTRUCTOR index
  * https://gcc.gnu.org/r17-3765-g40cbcd4eedce58
 *

GCC discussion:
 *

GCC bugzilla stats
 *  125 new issues filed
 *  95 issues closed

binutils/gdb commits:
 * x86: Support AVX10_V2_AUX instructions
  * https://sourceware.org/cgit/binutils-gdb/commit/?id=84b5fe5be98582a247346f4fba8072f286498dad
 *

gdb discussion:
 *
binutils discussion:
 *
glibc commits:
 * math: Update tanh from CORE-MATH (revision bb39e4fa)
  * https://sourceware.org/cgit/glibc/commit/?id=70cc22b19c2037097f0f0cce89488763c6c49f5b
 * x86: Update AVX10 support
  * https://sourceware.org/cgit/glibc/commit/?id=56f3aed8bb8be64d1a78488a427e7c61c7c866cf
 *
glibc discussion:
 *

GNU Tools Weekly News Week 54 (September 6, 2026)

[GNU Tools weekly via Gdb]

GNU Tools Weekly News Week 54 (September 6, 2026)
Release updates for GNU toolchain:
 * GDB 18.1.0 update
  * https://inbox.sourceware.org/gdb-patches/874ig9t4s5.fsf@redhat.com/
 * GCC 13.5.0 update
  * RC1 was published
  * https://inbox.sourceware.org/gcc/9r6n9o16-7on9-62rn-9r08-251o692n7oo5@fhfr.qr/
  * https://inbox.sourceware.org/gcc/ns42774p-s754-16so-205n-77110r4p6ss5@fhfr.qr/
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):
 * rustc_codegen_gcc: Progress Report #43
  * https://blog.antoyo.xyz/rustc_codegen_gcc-progress-report-43
 * Kito Cheng is now the RISCV binutils maintainer
  * https://sourceware.org/cgit/binutils-gdb/commit/?id=250c0280ba546e85315bafbc820c1b70242d8e6e

GCC easy issue to tackle of the week:
 * (int)(((unsigned)a) + CST) should be simplified into a + CST if
a+CST is known not to overflow in int
  * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126751
  *  Reach out to Andrea Pinski <andrew.pinski@oss.qualcomm.com> for
mentoring on this issue.
 * Previous ones are listed on https://gcc.gnu.org/wiki/EasyIssuesOfTheWeek

GCC commits:
 * https://gcc.gnu.org/r17-3775 r17-3966 -  192 commits
 * forwprop: add simplify_phi_result_movdiv
  * https://gcc.gnu.org/r17-3791-g5b40e9d181bfe2
 * match: Fold CPROJ when nested inside CPROJ or CABS
  * https://gcc.gnu.org/r17-3801-g0e0ddac529e215
 * middle-end: add const fold for various crc builtins
  * https://gcc.gnu.org/r17-3816-g26238368615c0a
 * x86: ACEv1 support
  * https://gcc.gnu.org/r17-3847 https://gcc.gnu.org/r17-3848
https://gcc.gnu.org/r17-3849
  * https://gcc.gnu.org/r17-3850 https://gcc.gnu.org/r17-3851
https://gcc.gnu.org/r17-3852
  * https://gcc.gnu.org/r17-3853
 * libcpp: Optimize Arm search_line_fast
  * https://gcc.gnu.org/r17-3868-gffc5227ac2e198
 * RISC-V: Add MVENDORID, MARCHID and MIMPID for 6 RISC-V cores
  * https://gcc.gnu.org/r17-3882-gd3d6b2a1fba366
 * RISC-V: Support -mtune=native and -mcpu=native
  * https://gcc.gnu.org/r17-3883-gbbc5005bf48212
 * RISC-V: Add TImode and OImode move expanders.
  * https://gcc.gnu.org/r17-3906-ge096b2205f81b3
 * match: Simplify MIN(A, B) eq/ne 0 to A when B is positive
  * https://gcc.gnu.org/r17-3779-g09fe63bb71e6b1

GCC discussion:
 *

GCC bugzilla stats
 *  84 new issues filed
 *  63 issues closed

binutils/gdb commits:
 * RISC-V: Add support for XAndes* extensions
  * https://sourceware.org/cgit/binutils-gdb/log/?id=ce6455998599d6a8af6f4aea8813392921e4e86c&qt=range&q=%0948c933a69a890e7769ca8a01570aab578b6a9f54...ce6455998599d6a8af6f4aea8813392921e4e86c
 * RISC-V: Add support for XXTVarith and XXTVcoder extensions
  * https://sourceware.org/cgit/binutils-gdb/commit/?id=f67471902997e528e789ed27f1bf930318052ecc
 * x86: support further AMD Zen6 instructions
  * https://sourceware.org/cgit/binutils-gdb/commit/?id=99f119ca28d9d38766dc08c880d421ce126ab48a

gdb discussion:
 *

binutils discussion:
 *

glibc commits:
 *

glibc discussion:
 *

GNU Tools Weekly News Week 55 (September 13, 2026)

[GNU Tools weekly via Gdb]

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/87h5jscjhu.fsf@redhat.com/
 * GCC 13.5.0 was released
  * https://inbox.sourceware.org/gcc/952104o8-0r3s-oq9q-7619-q1o3r58p4ssq@fhfr.qr/


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/8b7f85ea-4cf2-413b-9c88-87d4bd829f46@opensrcsec.com/
 * Notes from Sourceware - Building Together, Fri 11, 15:00 UTC
  * https://inbox.sourceware.org/gcc/20260911201600.GO23490@gnu.wildebeest.org/
 * 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 <andrew.pinski@oss.qualcomm.com> 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:
 *

GNU Tools Weekly News Week 56 (September 20, 2026)

[GNU Tools weekly via Gdb]

GNU Tools Weekly News Week 56 (September 20, 2026)
Sorry I am a few days late.

Release updates for GNU toolchain:
 * GDB 18.1.0 update
  * https://inbox.sourceware.org/gdb-patches/87se32aoq1.fsf@redhat.com
  * Release is this Friday!

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):
 * Syncing Rust GCC ["JIT"] backend or how to test Murphy's law
  * https://blog.guillaume-gomez.fr/articles/2026-09-22+Syncing+Rust+GCC+backend+or+how+to+test+Murphy%27s+law
 * Meeting minutes - Office Hours for the GNU Toolchain - 2026-09-17
  * https://inbox.sourceware.org/gcc/190c0f1d-cbe9-4fe2-be74-58c6042667b1@redhat.com/
  * https://gcc.gnu.org/wiki/OfficeHours
 *

GCC easy issue to tackle of the week:
 *  `(a&-a) < 0` -> `a == INT_MIN`
  * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126627
  *  Reach out to Andrea Pinski <andrew.pinski@oss.qualcomm.com> for
mentoring on this issue.
 * Previous ones are listed on https://gcc.gnu.org/wiki/EasyIssuesOfTheWeek

GCC commits:
 * https://gcc.gnu.org/r17-4212 ... r17-4502 -  291 commits
  * Improve saturated unsigned add detection
  * https://gcc.gnu.org/r17-4218 https://gcc.gnu.org/r17-4219
 * gccrs sync
  * https://gcc.gnu.org/r17-4278 ... https://gcc.gnu.org/r17-4360
 * Improve some code in std::vector::push_back
  * https://gcc.gnu.org/r17-4377-ge548eb628c689e
https://gcc.gnu.org/r17-4378-gedb9556068ae47
 * contrib, libcpp, libstdc++: Update to Unicode 18.0.0
  * https://gcc.gnu.org/r17-4409-g20a1e5b5c5addc
 * aarch64: Add support for FEAT_CMH atomic {store,load} intrinsics
  * https://gcc.gnu.org/r17-4448-gd5a076158aa3da
https://gcc.gnu.org/r17-4449-g4015b65b038bea
 * phiopt: Better pre-vect heurstics for factoring out loads
  * https://gcc.gnu.org/r17-4456-gb1dcde565577e8
 * cselim: cond_if_else_store_replacement_limited support skipping on
store one either side
 * https://gcc.gnu.org/r17-4469-ge35b8dad030bc4

GCC discussion:
 *

GCC bugzilla stats
 *  140 new issues filed
 *  55 issues closed

binutils/gdb commits:
 * RISC-V: Add Zama16b extension support
  * https://sourceware.org/cgit/binutils-gdb/commit/?id=59db9002142a655b4d5e4af7cbf0605aaddefc7e
 * RISC-V: Add support for ziccamoc extension.
  * https://sourceware.org/cgit/binutils-gdb/commit/?id=cd2166234b9e6569b1cf8a4169e58f487996c447

gdb discussion:
 *
binutils discussion:
 *
glibc commits:
 * aarch64: Add MTE mode tunable
  * https://sourceware.org/cgit/glibc/commit/?id=8f6dfd399a97c77ea6855a5eb28a6babb81ec31c
 * math: Update tanh from CORE-MATH
  * https://sourceware.org/cgit/glibc/commit/?id=1c8c9998d803897d5765fab8c68ad9b0db6f7444
 * malloc: Improve calloc
  * https://sourceware.org/cgit/glibc/commit/?id=4b4de574ad95ffbee25b4aed3891275fd769ff3c
 *
glibc discussion:
 * glibc buildbot status
  * https://inbox.sourceware.org/libc-alpha/20260920192938.GG2330@gnu.wildebeest.org/

GNU Tools Weekly News Week 57 (September 27, 2026)

[GNU Tools weekly via Gdb]

GNU Tools Weekly News Week 57 (September 27, 2026)
Note there will be no newsletter next week due to the cauldron.

Release updates for GNU toolchain:
 * GDB 18.1.0 was released
  * https://inbox.sourceware.org/gdb/announce.6ab698d7.84bf0792.34ed8d.a212@mx.google.com/

GNU toolchain conference reminders:
 *  GNU Tools Cauldron 2026
  * This 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):
 *

GCC easy issue to tackle of the week:
 *  Missed optimization in math expression: optimize float / in some cases
  * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83715
  * Hint, this is like previous one: https://gcc.gnu.org/PR126745;
though slightly more involved due to float rules
  *  Reach out to Andrea Pinski <andrew.pinski@oss.qualcomm.com> for
mentoring on this issue.
 * Previous ones are listed on https://gcc.gnu.org/wiki/EasyIssuesOfTheWeek

GCC commits:
 * https://gcc.gnu.org/r17-4503 ... r17-4705 -  203 commits
 * match: Fold redundant integer-float-integer conversions
  * https://gcc.gnu.org/r17-4503-gd0e28326d4254e
 * match: fold extract-bitfield-and-shift expressions
  * https://gcc.gnu.org/r17-4511-g885ad73e630ca2
 * aarch64: Improve isnan, isfinite, isinf and isnormal and fpclassify
  * https://gcc.gnu.org/r17-4523-ge8fb8ba77cf7a1
  * https://gcc.gnu.org/r17-4524-g52330debcdf1fc
  * https://gcc.gnu.org/r17-4525-g5cc9ef64063c45
 * match: fold abs(x) comparisons with x
  * https://gcc.gnu.org/r17-4549-g59c8c4bbac4657
 * Improve libstdc++ rege
  * https://gcc.gnu.org/r17-4552 https://gcc.gnu.org/r17-4553
  * https://gcc.gnu.org/r17-4554 https://gcc.gnu.org/r17-4555
 * AArch64: Turn off outline atomics with -mcmodel=large
  * https://gcc.gnu.org/r17-4655-gee5bf81d7816b0
 * simplify-rtx: [SU]MUL_HIGHPART RTL simplifications
  * https://gcc.gnu.org/r17-4656-gd382f953805cb0
 * C++26 P3769R1: Clarification of placement new deallocation as a DR
  * https://gcc.gnu.org/r17-4658-geed9f52920aa36
 * range-ops: derive operand equality from a zero MINUS_EXPR
  * https://gcc.gnu.org/r17-4663-gbddea69ee406a0
 * match.pd: Fold (a != 0) | (popcount(a) == n) and related patterns
  * https://gcc.gnu.org/r17-4693-g56efa4a739786b
 * vect: Look through promotions for SAT_TRUNC
  * https://gcc.gnu.org/r17-4697-g19378ecd385156
 * middle-end: fold VEC_UNPACK_LO/_HI over poly constants
  * https://gcc.gnu.org/r17-4593-g1743eb860b739c

GCC discussion:
 *
GCC bugzilla stats
 *  123 new issues filed
 *  63 issues closed

binutils/gdb commits:
 * LoongArch: Enable shared library and PIE support for loongarch*-elf
  * https://sourceware.org/cgit/binutils-gdb/commit/?id=196286d25ccc652dc086ae173d1cfa836bed0618
 * RISC-V: Enable shared library and PIE support for riscv*-elf
  * https://sourceware.org/cgit/binutils-gdb/commit/?id=b73d23cccf5568321cabaad3a8ec5cddafdef4ec
 * RISC-V: Add optional register argument to tail pseudo
  * https://sourceware.org/cgit/binutils-gdb/commit/?id=441953ac9d0b2902be92906817c68feadccd190f

gdb discussion:
 *
binutils discussion:
  *
glibc commits:
 * math: Sync lgamma, acosf, exp10m1f, and tgamma with CORE-MATH
  * https://sourceware.org/cgit/glibc/log/?id=90156a65a6318b2e1a5ef44501f50fe87db1b601&qt=range&q=90156a65a6318b2e1a5ef44501f50fe87db1b601...1555d46b08dba3a9abbcd956237108b3072f4290%5E
 * AArch64: Add SVE2 memchr
  * https://sourceware.org/cgit/glibc/commit/?id=3edeb81021feff11a3d0e934d68446f6a67dd1a3
 *
glibc discussion:
 * segfault after reallocation (Was: malloc: Change mmap chunk layout)
  * https://inbox.sourceware.org/libc-alpha/armngyyT1otFqpSq@end/