[macports-base] branch fix-cxx-2017-compiler-sel created (now 01318c7)

[Chris Jones]

Chris Jones (cjones051073) pushed a change to branch fix-cxx-2017-compiler-sel
in repository macports-base.

      at 01318c7  Fix c++17 compiler selection to blacklist incomplete mac10.13 versions

This branch includes the following new commits:

     new 01318c7  Fix c++17 compiler selection to blacklist incomplete mac10.13 versions

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