[MacPorts] #53605: get GCC to use libc++?

[MacPorts]

#53605: get GCC to use libc++?
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  Reporter:  RJVB       |      Owner:
      Type:  request    |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:
      Port:  gcc6 gcc7  |
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Comment (by RJVB):

 Thanks, but I think I have something a little more elegant :)

 Preliminary build tests succeed, as long as I don't allow the compiler to
 use AVX intrinsics. Apparently GCC uses a dialect or simply operations
 that the cctools as command doesn't grok (on 10.9.5).

 The 10.9.5 system libc++ also appears to be missing the `operator
 delete(void*, unsigned long)` function which is used in an intermediate
 executable. When was that function added to libc++?

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Ticket URL: <https://trac.macports.org/ticket/53605#comment:5>
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