[MacPorts] #57994: OpenBLAS compilation fails on MacBook Pro MacOS 10.14

[MacPorts]

#57994: OpenBLAS compilation fails on MacBook Pro MacOS 10.14
-------------------------+-------------------------
  Reporter:  Tim-at-AST  |      Owner:  NicosPavlov
      Type:  defect      |     Status:  reopened
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.5.4
Resolution:              |   Keywords:
      Port:  OpenBLAS    |
-------------------------+-------------------------

Comment (by kencu):

 You have stumbled across a current issue we have wherein Apple's latest
 released open-source version of `ld64-latest` is behind the `ld64-xcode`
 version, due to some internal Apple issues that are being sorted out.

 We have the default variants set up for `ld64` to get you to the `+xcode`
 variant, but somehow, you don't have that. I'm not sure how or why you
 don't, but anyway, that fix should do it for you.

-- 
Ticket URL: <https://trac.macports.org/ticket/57994#comment:17>
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