[Bug testsuite/71021] [libatomic testsuite] Test program compilation fail (missing -pthread flag)

[romain.geissler at amadeus dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71021

--- Comment #3 from Romain Geissler <romain.geissler at amadeus dot com> ---
Please note that this is the only target lib that fails for me. Others (like
libgomp) are fine.