[Bug testsuite/82920] cet test failures on darwin

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82920

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Dominique d'Humieres from comment #0)

Maybe these tests should be limited to Linux targets.