[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@…):

 I agree with your concerns about the performance impact, however, I think
 it is practically ignorable, because all assemblers included in ccutils
 are too old to support AVX instructions.

 All the versions of macports' gcc use {{{as}}} from macports' ccutils and
 XCode's gcc uses /usr/bin/as, and both of those assemblers are too old. As
 a result, all of those gcc do not compile AVX (some people tried to
 replace an assembler by clang, but it looks just an experiment
 [http://stackoverflow.com/questions/9840207/how-to-use-avx-pclmulqdq-on-
 mac-os-x-lion]...).

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Ticket URL: <https://trac.macports.org/ticket/38271#comment:3>
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