[MacPorts] #69295: lapack @3.12.0_0+gfortran+openblas (and +accelerate) fails to build on MacOS 10.15 on x86_64

[MacPorts]

#69295: lapack @3.12.0_0+gfortran+openblas (and +accelerate) fails to build on
MacOS 10.15 on x86_64
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  Reporter:  Gandoon  |      Owner:  tenomoto
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.9.1
Resolution:           |   Keywords:  catalina
      Port:  lapack   |
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Comment (by Gandoon):

 Replying to [comment:6 Gandoon]:
 > Replying to [comment:3 Dave-Allured]:
 > > Eric, just for my information, did you try either `lapack` or `lapack
 +gfortran`, without either `+accelerate` or `+openblas`?
 >
 > No, I did not. I have always had the `+openblas` enabled. It has never
 given me any trouble in the past. I could as an experiment try to build it
 without blas, but I am unsure if the rest of my system will work as
 intended in that case. I will return with the results once it has been
 tried.
 >

 Ok, I have tried. It does build without `+openblas` or `+accelerate`.
 Thus, it seems to be an issue with the use of external blas libraries. Am
 I correct in that assessment?

 So, my question now is: would this build without `+openblas` be
 detrimental with regards to performance? I do have `OpenBLAS
 @0.3.25_6+gcc13+lapack` built, as that is what is being used by, among
 several, Python and Octave. I expected `OpenBLAS` to require `lapack
 +openblas` in order to function correctly in that configuration. Maybe I
 am mistaken?

-- 
Ticket URL: <https://trac.macports.org/ticket/69295#comment:7>
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