[MacPorts] #65395: py-numpy: fails to build on macOS 10.14

[MacPorts]

#65395: py-numpy: fails to build on macOS 10.14
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  Reporter:  ra1nb0w   |      Owner:  michaelld
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  py-numpy  |
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Comment (by michaelld):

 Building gcc12 at the moment, and then I'll finalize testing. I ''think''
 the issue is that when using `+gfortran` the C/C++ compiler is AppleClang
 -- the Clang installed by Xcode, which for 10.14 the most recent is `Apple
 clang version 11.0.0 (clang-1100.0.33.17)` -- and AppleClang is notorious
 for not about feature set support correct. I ''think'' with `-gfortran
 +gcc*` we use GCC for all compilers, and GCC is much better about getting
 feature set support correct. If I'm correct then blocking use of specific
 AppleClang is the way to go for MP needs. NumPy should add better testing
 to verify feature set support, but that's outside the scope of what I am
 reasonably going to do. More soon!

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Ticket URL: <https://trac.macports.org/ticket/65395#comment:19>
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