[MacPorts] #57797: OpenBLAS @0.3.4_1 forces system AR and RANLIB but this errors on older systems

[MacPorts]

#57797: OpenBLAS @0.3.4_1 forces system AR and RANLIB but this errors on older
systems
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  Reporter:  kencu     |      Owner:  NicosPavlov
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:  snowleopard leopard
      Port:  openblas  |
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Comment (by NicosPavlov):

 Thanks for the comment.
 I did not notice, but it indeed seems that forcing the use of system's ar
 and ranlib is not needed anymore in several cases.

 I tried on Mojave, and several combinations of compilers build properly
 even without that line in the Portfile.

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Ticket URL: <https://trac.macports.org/ticket/57797#comment:3>
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