OpenBLAS fixed in Xcode 11.2

[Ryan Schmidt]

On Nov 8, 2019, at 20:03, Joshua Root wrote:

> 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'?

MacPorts default optimization flag is -Os.