[MacPorts] #58646: gcc8 @8.3.0_4 +universal: does not build/install universal libraries

[MacPorts]

#58646: gcc8 @8.3.0_4 +universal: does not build/install universal libraries
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  Reporter:  Ionic      |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:
      Port:  gcc8 gcc9  |
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Comment (by Ionic):

 Yeees, but OpenBLAS tries to link files from the `gccX` port, not
 `libgcc`. Not sure if that is a bug with OpenBLAS or intended that way.

 On 10.9, `libgcc` is being provided by `libgcc9` and sadly I don't have
 that installed `+universal`. I do have `libgcc8` installed `+universal`,
 but that isn't helping, since `libgcc8` is a stub port that only installs
 a README file.

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Ticket URL: <https://trac.macports.org/ticket/58646#comment:2>
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