[Bug libstdc++/125197] [16 Regression] -m32 libstdc++ is built incorrectly for sparc64

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125197

--- Comment #2 from Drea Pinski <pinskia at gcc dot gnu.org> ---
So looking into this. The atomic_flags are only used when running the
testsuite.