[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:
 Keywords:           |       Port:  gcc6 gcc7
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 (I guess this is a request for an enhancement...)

 In reaction to Marcus's new C++11 PG (which I think implements [http
 ://ease-the-computation.haunted.io/compile-clang-against-libstdc-with-c11
 -support-on-a-mac/ this idea]) I wondered if it wouldn't be possible to
 create a modified GCC build that uses libc++ . In my experience on Linux
 GCC 6 still creates sometimes significantly faster code and the build
 speed gap has narrowed with every new clang release becoming slower and
 every new GCC release becoming faster. So there could be a real benefit to
 using GCC for code that doesn't require any clang-specific features like
 blocks - meaning the vast majority of cross-platform software.

 GCC can be made to use libc++ at runtime
 (http://libcxx.llvm.org/docs/UsingLibcxx.html#using-libc-with-gcc) so it
 should be possible to hardcode the paths/options provided in that example.
 Has this been tried before (I couldn't find any trace on google)?

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