Set CC to clang++

[Steven Smith]

I must set the clang compiler to clang++ or g++ to avoid some ld symbol mangling issue (see below).

What’s the right Portfile directive to do this?

Effectively, I believe that I need:

CC=/usr/bin/clang++


Error on the Mac: Undefined symbols for architecture x86_64 · Issue #285 · nlohmann/json
https://github.com/nlohmann/json/issues/285#issuecomment-348090484
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