[MacPorts] #63630: OpenBLAS @0.3.18_0+gcc7+lapack+native: Builds ppc7400 on a G3

[MacPorts]

#63630: OpenBLAS @0.3.18_0+gcc7+lapack+native: Builds ppc7400 on a G3
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  Reporter:  evanmiller  |      Owner:  NicosPavlov
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.7.1
Resolution:              |   Keywords:  powerpc g3
      Port:  OpenBLAS    |
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Comment (by evanmiller):

 I've done a little more research here. Adding {{{-force_cpusubtype_ALL}}}
 to the Fortran flags results in {{{libopenblas-r1.a}}} being built as ppc,
 which is good. However, the final link phase that converts the static
 archive to a dylib results in the creation of a ppc7400 dylib file, even
 though {{{-force_cpusubtype_ALL}}} is explicitly passed. So maybe it's a
 compiler issue - I'm not sure.

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Ticket URL: <https://trac.macports.org/ticket/63630#comment:4>
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