[Linaro-TCWG-CI] gcc-16-5977-gcf22e30f0cf: Failure on arm

Dear contributor,

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

In gcc_build master-arm, after:
  | commit gcc-16-5977-gcf22e30f0cf
  | Author: Nathaniel Shead <[email protected]>
  | Date:   Sun Dec 7 23:17:15 2025 +1100
  | 
  |     c++: Non-inline temploid friends should still be COMDAT [PR122819]
  |     
  |     Modules allow temploid friends to no longer be implicitly inline, as
  |     functions defined in a class body will not be implicitly inline if
  |     attached to a named module.
  | ... 24 lines of the commit log omitted.

Produces Failure:
  | Results changed to
  | # reset_artifacts:
  | -10
  | # true:
  | 0
  | # build_abe gcc:
  | # FAILED
  | # First few build errors in logs:
  | # 00:05:24 make[2]: [Makefile:1851: armv8l-unknown-linux-gnueabihf/bits/largefile-config.h] Error 1 (ignored)
  | # 00:06:52 make[7]: [Makefile:853: stamp-modules-bits] Error 1 (ignored)
  | # 00:11:40 /usr/bin/ld: /home/tcwg-buildslave/workspace/tcwg_gnu_3/abe/builds/destdir/armv8l-unknown-linux-gnueabihf/lib/gcc/armv8l-unknown-linux-gnueabihf/16.0.0/../../../libstdc++.so: undefined reference to `std::__istream_extract(std::istream&, char*, int)'
  | # 00:11:40 collect2: error: ld returned 1 exit status
  | # 00:11:42 /usr/bin/ld: /home/tcwg-buildslave/workspace/tcwg_gnu_3/abe/builds/destdir/armv8l-unknown-linux-gnueabihf/lib/gcc/armv8l-unknown-linux-gnueabihf/16.0.0/../../../libstdc++.so: undefined reference to `std::__istream_extract(std::istream&, char*, int)'
  | # 00:11:42 collect2: error: ld returned 1 exit status
  | 
  | From
  | # reset_artifacts:
  | -10
  | # true:
  | 0
  | # build_abe gcc:
  | 1

Used configuration :
 *CI config* tcwg_gcc_build master-arm
 *configure and test flags:* none, autodetected on armv8l-unknown-linux-gnueabihf

We track this bug report under https://linaro.atlassian.net/browse/GNU-1777. 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
 * https://ci.linaro.org/job/tcwg_gcc_build--master-arm-build/4213/artifact/artifacts/
The full lists of regressions and improvements as well as configure and make commands are in
 * https://ci.linaro.org/job/tcwg_gcc_build--master-arm-build/4213/artifact/artifacts/notify/

Current build   : https://ci.linaro.org/job/tcwg_gcc_build--master-arm-build/4213/artifact/artifacts
Reference build : https://ci.linaro.org/job/tcwg_gcc_build--master-arm-build/4212/artifact/artifacts

Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/cf22e30f0cfae65dd012966cab657583e2be667e/tcwg_gcc_build/master-arm/reproduction_instructions.txt

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