[MacPorts] #41622: fftw-3: enable avx instructions

[MacPorts]

#41622: fftw-3: enable avx instructions
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 Reporter:  nicos@…      |      Owner:  ram@…
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:  haspatch     |       Port:  fftw-3
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 The proposed patch enables avx optimisation in case of clang compiler,
 along with the other optimizations in the portfile.

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Ticket URL: <https://trac.macports.org/ticket/41622>
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