[Bug tree-optimization/68356] FAIL: gcc.dg/torture/pr68264.c -O* execution test on x86_64-apple-darwin1(0|4)

[joseph at codesourcery dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68356

--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot 
com> ---
Darwin defaults to -fno-math-errno, and tests for libm functions setting 
errno should be disabled there.