[Linaro-TCWG-CI] gcc-17-471-ge79f0f818c0: 54 regressions on arm

Dear contributor,

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

In  master-arm_eabi, after:
  | commit gcc-17-471-ge79f0f818c0
  | Author: Jonathan Wakely <[email protected]>
  | Date:   Tue Apr 28 13:15:22 2026 +0100
  | 
  |     libstdc++: Improve handling of leap second expiry time [PR123165]
  |     
  |     This change allows the hardcoded list of leap seconds in <chrono> to be
  |     used even when the program is executing after the hardcoded expiry date
  |     in that header.
  | ... 48 lines of the commit log omitted.

Produces 54 regressions:
  | 
  | regressions.sum:
  | Running libstdc++:libstdc++-dg/conformance.exp ...
  | FAIL: std/time/clock/gps/1.cc -std=gnu++20 (test for excess errors)
  | UNRESOLVED: std/time/clock/gps/1.cc -std=gnu++20 compilation failed to produce executable
  | FAIL: std/time/clock/tai/1.cc -std=gnu++20 (test for excess errors)
  | UNRESOLVED: std/time/clock/tai/1.cc -std=gnu++20 compilation failed to produce executable
  | ... and 50 more

Used configuration :
 *CI config* tcwg_gnu_embed_check_gcc master-arm_eabi
 *configure and test flags:* --target arm-eabi 

We track this bug report under https://linaro.atlassian.net/browse/GNU-1924. (Require Linaro login) Please let us know if you have a fix.

If you have any questions regarding this report, please ask on [email protected] mailing list.

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

You can find the failure logs in *.log.1.xz files in
 * http://54.172.246.49:9090/jobs/tcwg_gnu_embed_check_gcc--master-arm_eabi-build/builds/10072/archive/artifacts/00-sumfiles/
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_check_gcc--master-arm_eabi-build/builds/10072/archive/artifacts/notify/
The list of [ignored] baseline and flaky failures are in
 * http://54.172.246.49:9090/jobs/tcwg_gnu_embed_check_gcc--master-arm_eabi-build/builds/10072/archive/artifacts/sumfiles/xfails.xfail

Current build   : http://54.172.246.49:9090/jobs/tcwg_gnu_embed_check_gcc--master-arm_eabi-build/builds/10072/archive/artifacts/
Reference build : http://54.172.246.49:9090/jobs/tcwg_gnu_embed_check_gcc--master-arm_eabi-build/builds/10071/archive/artifacts/

Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/e79f0f818c0e42d0d84c90a54684dfb269ac388c/tcwg_gnu_embed_check_gcc/master-arm_eabi/reproduction_instructions.txt

Full commit : See in git+ssh://[email protected]/git/gcc.git