Hi Adhemerval,

This is likely a GCC bug with 64-bit atomics (PR120351 I guess). Using latest trunk or forcing 64-bit atomics off during configure fixes it.

Cheers, Wilco

________________________________________ From: ci_notify@linaro.org ci_notify@linaro.org Sent: 11 November 2025 05:19 To: adhemerval.zanella@linaro.org adhemerval.zanella@linaro.org Cc: linaro-toolchain@lists.linaro.org linaro-toolchain@lists.linaro.org; Wilco Dijkstra Wilco.Dijkstra@arm.com Subject: [Linaro-TCWG-CI] glibc-2.42.9000-426-g53807741fb4: 1 regression on arm

Dear contributor,

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

In glibc_check master-arm, after: | commit glibc-2.42.9000-426-g53807741fb4 | Author: Wilco Dijkstra Wilco.Dijkstra@arm.com | Date: Thu Sep 11 10:49:47 2025 -0300 | | Define __HAVE_64B_ATOMICS from compiler support | | Now that atomic builtins are used by default, we can rely on the | compiler to define when to use 64-bit atomic operations. | | ... 7 lines of the commit log omitted.

Produces 1 regression: | | regressions.sum: | Running glibc:nss ... | FAIL: nss/tst-cancel-getpwuid_r

Used configuration : *CI config* tcwg_glibc_check 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-1745. Please let us know if you have a fix.

If you have any questions regarding this report, please ask on linaro-toolchain@lists.linaro.org 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 * https://ci.linaro.org/job/tcwg_glibc_check--master-arm-build/3193/artifact/a... The full lists of regressions and improvements as well as configure and make commands are in * https://ci.linaro.org/job/tcwg_glibc_check--master-arm-build/3193/artifact/a... The list of [ignored] baseline and flaky failures are in * https://ci.linaro.org/job/tcwg_glibc_check--master-arm-build/3193/artifact/a...

Current build : https://ci.linaro.org/job/tcwg_glibc_check--master-arm-build/3193/artifact/a... Reference build : https://ci.linaro.org/job/tcwg_glibc_check--master-arm-build/3192/artifact/a...

Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/glibc/...

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