[MacPorts] #68683: gcc8+: doesn't work on macOS 10.6

[MacPorts]

#68683: gcc8+: doesn't work on macOS 10.6
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  Reporter:  catap                                   |      Owner:  (none)
      Type:  defect                                  |     Status:  new
  Priority:  Normal                                  |  Milestone:
 Component:  ports                                   |    Version:
Resolution:                                          |   Keywords:
      Port:  gcc8, gcc9, gcc10, gcc11, gcc12, gcc13  |
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Comment (by kencu):

 I believe what happens is that the gcc build tests what features the
 assembler supports during configure.

 As currently some newer macports-clang is present during the gcc build
 these days, gcc’s configure sees that flag as supported.

 Later, if you try to run gcc without any macports-clang, the old ‘gas ‘
 assembler is used and as you point out, it fails.

 You’ll have to think about which systems should have a dependency added,
 and which clang should be added.

 Some gccs already add a clang dep to support libc++ I believe, so take
 that into consideration too when you decide.

-- 
Ticket URL: <https://trac.macports.org/ticket/68683#comment:7>
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