[Bug target/63773] [meta-bug] Restoring darwin bootstrap for gcc 5.0

[howarth at bromo dot med.uc.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63773

--- Comment #10 from howarth at bromo dot med.uc.edu ---
Regression testing on x86_64-apple-darwin14 at
https://gcc.gnu.org/ml/gcc-testresults/2014-11/msg00806.html.