Dear contributor,

Our automatic CI has detected problems related to your patch(es). Please find 
some details below.

In  arm-eabi cortex-m7 hard, after:
  | commit gcc-16-2112-gac2fb60a67d6
  | Author: Jonathan Wakely <jwak...@redhat.com>
  | Date:   Fri Jul 4 16:44:13 2025 +0100
  | 
  |     libstdc++: Ensure pool resources meet alignment requirements [PR118681]
  |     
  |     For allocations with size > alignment and size % alignment != 0 we were
  |     sometimes returning pointers that did not meet the requested aligment.
  |     For example, allocate(24, 16) would select the pool for 24-byte objects
  | ... 23 lines of the commit log omitted.

Produces Failure:
  | Results changed to
  | # reset_artifacts:
  | -10
  | # true:
  | 0
  | # build_abe binutils:
  | 1
  | # build_abe stage1 -- --set gcc_override_configure=--disable-multilib --set 
gcc_override_configure=--with-mode=thumb --set 
gcc_override_configure=--with-cpu=cortex-m7 --set 
gcc_override_configure=--with-float=hard:
  | 2
  | # build_abe newlib:
  | 4
  | # build_abe stage2 -- --set gcc_override_configure=--disable-multilib --set 
gcc_override_configure=--with-mode=thumb --set 
gcc_override_configure=--with-cpu=cortex-m7 --set 
gcc_override_configure=--with-float=hard:
  | # FAILED
  | # build_abe gdb:
  | # build_abe qemu:
  | # First few build errors in logs:
  | # 00:06:32 
/home/tcwg-buildslave/workspace/tcwg_gnu_1/abe/snapshots/gcc.git~master/libstdc++-v3/src/c++17/memory_resource.cc:1474:29:
 error: ‘choose_block_size’ was not declared in this scope
  | # 00:06:32 
/home/tcwg-buildslave/workspace/tcwg_gnu_1/abe/snapshots/gcc.git~master/libstdc++-v3/src/c++17/memory_resource.cc:1491:25:
 error: ‘choose_block_size’ was not declared in this scope
  | # 00:06:32 make[5]: *** [Makefile:587: memory_resource.lo] Error 1
  | # 00:06:32 make[4]: *** [Makefile:797: all-recursive] Error 1
  | # 00:06:32 make[3]: *** [Makefile:577: all-recursive] Error 1
  | # 00:06:32 make[2]: *** [Makefile:502: all] Error 2
  | # 00:06:32 make[1]: *** [Makefile:12269: all-target-libstdc++-v3] Error 2
  | # 00:06:32 make: *** [Makefile:1062: all] Error 2
  | 
  | From
  | # reset_artifacts:
  | -10
  | # true:
  | 0
  | # build_abe binutils:
  | 1
  | # build_abe stage1 -- --set gcc_override_configure=--disable-multilib --set 
gcc_override_configure=--with-mode=thumb --set 
gcc_override_configure=--with-cpu=cortex-m7 --set 
gcc_override_configure=--with-float=hard:
  | 2
  | # build_abe newlib:
  | 4
  | # build_abe stage2 -- --set gcc_override_configure=--disable-multilib --set 
gcc_override_configure=--with-mode=thumb --set 
gcc_override_configure=--with-cpu=cortex-m7 --set 
gcc_override_configure=--with-float=hard:
  | 5
  | # build_abe gdb:
  | 6
  | # build_abe qemu:
  | 7

Used configuration :
 *CI config* tcwg_gnu_embed_build arm-eabi -mthumb -march=armv7e-m+fp.dp 
-mtune=cortex-m7 -mfloat-abi=hard -mfpu=auto
 *configure and test flags:* --target arm-eabi --disable-multilib 
--with-mode=thumb --with-cpu=cortex-m7 --with-float=hard 
--target_board=-mthumb/-march=armv7e-m+fp.dp/-mtune=cortex-m7/-mfloat-abi=hard/-mfpu=auto
 qemu_cpu=cortex-m7

We track this bug report under https://linaro.atlassian.net/browse/GNU-1625. 
Please let us know if you have a fix.

If you have any questions regarding this report, please ask on 
linaro-toolch...@lists.linaro.org mailing list.

-----------------8<--------------------------8<--------------------------8<--------------------------

The information below contains the details of the failures, and the ways to 
reproduce a debug environment:

You can find the failure logs in
 * 
https://ci.linaro.org/job/tcwg_gnu_embed_build--master-thumb_m7_hard_eabi-build/147/artifact/artifacts/
The full lists of regressions and improvements as well as configure and make 
commands are in
 * 
https://ci.linaro.org/job/tcwg_gnu_embed_build--master-thumb_m7_hard_eabi-build/147/artifact/artifacts/notify/

Current build   : 
https://ci.linaro.org/job/tcwg_gnu_embed_build--master-thumb_m7_hard_eabi-build/147/artifact/artifacts
Reference build : 
https://ci.linaro.org/job/tcwg_gnu_embed_build--master-thumb_m7_hard_eabi-build/146/artifact/artifacts

Instruction to reproduce the build : 
https://gitlab.com/Linaro/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/ac2fb60a67d6d1de6446c25c5623b8a1389f4770/tcwg_gnu_embed_build/master-thumb_m7_hard_eabi/reproduction_instructions.txt

Full commit : See in git+ssh://linar...@gcc.gnu.org/git/gcc.git

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