[MacPorts] #38271: gsl @1.15_2: AVX should be disabled for variant +optimize

[MacPorts]

#38271: gsl @1.15_2: AVX should be disabled for variant +optimize
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  Reporter:  dtakahashi42@…  |      Owner:  jochen@…
      Type:  defect          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.1.3
Resolution:                  |   Keywords:  haspatch
      Port:  gsl             |
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Comment (by dtakahashi42@…):

 Because of the bugs in llvm's vectorizer, currently it is not good to rely
 on clang. And, using different assembler as a gcc's back end is not a
 standard setup. Therefore, I think disabling AVX is an only way to compile
 with optimized variant for most of users who need speed.

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Ticket URL: <https://trac.macports.org/ticket/38271#comment:5>
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