On Wed, 1 Jul 2026 at 18:38, <[email protected]> wrote:
>
> Dear contributor,
>
> Our automatic CI has detected problems related to your patch(es). Please find 
> some details below.
>
> In  arm-eabi cortex-m33 hard, after:
>   | commit gcc-17-2047-gb12fdd95251
>   | Author: Jonathan Wakely <[email protected]>
>   | Date:   Mon Jun 22 14:41:02 2026 +0100
>   |
>   |     libstdc++: Remove dependency on std::atomic<unsigned> in tzdb.cc
>   |
>   |     My r17-471-ge79f0f818c0e42 change to optimize handling of leap seconds
>   |     introduced a hard dependency on std::atomic<unsigned>, which causes
>   |     problems for targets without atomic word operations, like Cortex-M0.:
>   | ... 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-m33 --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-m33 --set 
> gcc_override_configure=--with-float=hard:
>   | # FAILED
>   | # build_abe gdb:
>   | # build_abe qemu:
>   | # First few build errors in logs:
>   | # 00:05:41 
> /home/tcwg-buildslave/workspace/tcwg_gnu_0/abe/snapshots/gcc.git~master/libstdc++-v3/src/c++20/tzdb.cc:1612:22:
>  error: ‘struct std::chrono::tzdb_list::_Node::NumLeapSeconds’ has no member 
> named ‘set_locked’
>   | # 00:05:43 make[5]: *** [Makefile:575: tzdb.lo] Error 1
>   | # 00:05:43 make[4]: *** [Makefile:802: all-recursive] Error 1
>   | # 00:05:43 make[3]: *** [Makefile:580: all-recursive] Error 1
>   | # 00:05:43 make[2]: *** [Makefile:505: all] Error 2
>   | # 00:05:43 make[1]: *** [Makefile:12318: all-target-libstdc++-v3] Error 2
>   | # 00:05:43 make: *** [Makefile:1093: 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-m33 --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-m33 --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=armv8-m.main+dsp+fp 
> -mtune=cortex-m33 -mfloat-abi=hard -mfpu=auto
>  *configure and test flags:* --target arm-eabi --disable-multilib 
> --with-mode=thumb --with-cpu=cortex-m33 --with-float=hard 
> --target_board=-mthumb/-march=armv8-m.main+dsp+fp/-mtune=cortex-m33/-mfloat-abi=hard/-mfpu=auto
>  qemu-cpu=cortex-m33
>
> We track this bug report under https://linaro.atlassian.net/browse/GNU-1941. 
> (Require Linaro login) Please let us know if you have a fix.

Already fixed on trunk, with r17-2061-gadb4f4a064c009



>
> If you have any questions regarding this report, please ask on 
> [email protected] 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
>  * 
> http://54.172.246.49:9090/jobs/tcwg_gnu_embed_build--master-thumb_m33_hard_eabi-build/builds/10035/archive/artifacts/
> The full lists of regressions and improvements as well as configure and make 
> commands are in
>  * 
> http://54.172.246.49:9090/jobs/tcwg_gnu_embed_build--master-thumb_m33_hard_eabi-build/builds/10035/archive/artifacts/notify/
>
> Current build   : 
> http://54.172.246.49:9090/jobs/tcwg_gnu_embed_build--master-thumb_m33_hard_eabi-build/builds/10035/archive/artifacts/
> Reference build : 
> http://54.172.246.49:9090/jobs/tcwg_gnu_embed_build--master-thumb_m33_hard_eabi-build/builds/10034/archive/artifacts/
>
> Instruction to reproduce the build : 
> https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/b12fdd952511786bf8d285e7080e94deeb32aa1d/tcwg_gnu_embed_build/master-thumb_m33_hard_eabi/reproduction_instructions.txt
>
> Full commit : See in git+ssh://[email protected]/git/gcc.git

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