OpenBLAS fixed in Xcode 11.2

[Joshua Root]

On 2019-11-9 10:28 , Jack Howarth wrote:
> I just noticed a really bizarre aspect to this Xcode 11 bug. If you
> build gmp manually from source with the default compiler flags in use...
> 
> ./configure
> make
> make check
> 
> the t-powm test case fails. However if you add -fstack-check
> explicitly on CFLAGS and CXXFLAGS, the t-powm test case failure is
> suppressed.
> 
> ./configure  CFLAGS='-O2 -fcheck-stack' CXXFLAGS='-O2 -fcheck-stack'
> make
> make check

Are the default compiler flags '-O2'?

- Josh