[MacPorts] #66634: simde fails to build on 10.6.8

[MacPorts]

#66634: simde fails to build on 10.6.8
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 Reporter:  barracuda156                   |      Owner:  jasonliu--
     Type:  defect                         |     Status:  assigned
 Priority:  Normal                         |  Milestone:
Component:  ports                          |    Version:  2.8.0
 Keywords:  snowleopard, rosetta, powerpc  |       Port:  simde
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 The port is broken on Rosetta, and likely on <10.7 in general.

 1. Old Apple gcc is not supported: https://github.com/simd-
 everywhere/simde
 Should be added to blacklist.

 2. Even with `gcc12` it still fails on Rosetta with numerous errors. Logs
 attached.

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Ticket URL: <https://trac.macports.org/ticket/66634>
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