https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69573
--- Comment #4 from Chen Gang <gang.chen.5i5j at gmail dot com> --- (In reply to Chen Gang from comment #3) > Created attachment 37625 [details] > Under my Darwin mac book OS X Yosemite 10.10.4, it looks short wide alignas > for long wide type will cause issue. Oh, sorry, it is my misunderstanding. I shall try the "make check" for this patch under Darwin with gcc 6.0.0. Thanks.