[PATCH] Link static C++ tests against libatomic.a if needed

[H.J. Lu]

On Mon, May 4, 2026 at 10:33 AM H.J. Lu <hjl.tools@gmail.com> wrote:
>
> Define cxx-static-link-libatomic to -latomic if DT_NEEDED entries in
> libstdc++.so include libatomic.so.  Update link-extra-libs-static to
> include $(cxx-static-link-libatomic) if -lstdc++ is used.
>
> Tested with sparcv8-linux-gnu-leon3 and sparcv9-linux-gnu using
> uild-many-glibcs.py.  This fixes BZ #34121.
>

FWIW, sparc g++ does pass -latomic_asneeded to ld.  But glibc tests
are built with -nostdlib -nostartfiles using gcc, not g++.


-- 
H.J.