[MacPorts] #51642: gcc49 @4.9.3: does not honor -march=native

[MacPorts]

#51642: gcc49 @4.9.3: does not honor -march=native
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  Reporter:  noloader  |      Owner:  macports-tickets@…
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.3.4
Resolution:            |   Keywords:
      Port:  gcc49     |
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Comment (by kencu):

 I'm not certain which option would be better. We can leave things as they
 are, and use either the `Wa,-q` flag, or  the `AS_INTEGRATED_ASSEMBLER=1`
 environment variable to get the alternate behaviour (clang as assembler
 instead of `as`).

 Or we could presumably change the gcc build (on Intel) to set clang as the
 assembler by default by specifying some version of clang here instead of
 `as` and then setting a build dep on that:
 {{{
 AS_FOR_TARGET=${prefix}/path/to/some/clang
 }}}

 HOWEVER, that could cause some irritating bootstrap issues and other
 issues...

 My initial inclination is to leave things as they are, as there is an easy
 workaround to get the "`clang` as `as`" option, but none to go the other
 way...

-- 
Ticket URL: <https://trac.macports.org/ticket/51642#comment:17>
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