[Bug libgomp/79876] [7 Regression] FAIL: libgomp.fortran/strassen.f90 -O execution test on x86_64-apple-darwin16

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79876

--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 41098
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41098&action=edit
gcc7-pr79876.patch

Found https://developer.apple.com/library/content/qa/qa1419/_index.html that
documents the default to be 512KB which is way too low (though it is unclear if
it is the same on all Darwin versions).
Anyway, here is an untested patch to bump the default on Darwin only.