[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 Tim-at-AST):

 {{{
 $ port -v installed | grep ld64
   ld64 @3_1 (active) platform='darwin 18' archs='x86_64'
 date='2019-02-01T14:37:19+1100'
   ld64-latest @274.2_2+llvm50 (active) platform='darwin 18' archs='x86_64'
 date='2019-02-01T14:37:16+1100'
   ld64-xcode @2_1 (active) platform='darwin 18' archs='x86_64'
 date='2019-02-03T20:48:00+1100'
 $
 }}}

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Ticket URL: <https://trac.macports.org/ticket/57994#comment:15>
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