Make Compiler Dependency Explicit

[Richard L. Hamilton]

Yes, thanks; all I previously mentioned rebuilt with configure.compiler=macports-clang-5.0 added to the "port upgrade" command line.



> On Jul 12, 2019, at 01:14, Ken Cunningham <ken.cunningham.webuse at gmail.com> wrote:
> 
> You will probably want to use clang-5.0 to build most things on SnowLeopard at present.
> 
> It's a good balance between new enough to work but not so new as to generate too many errors due to newer/stricter standards.
> 
> If you don't need thread_local storage, you can also use clang-3.7 for many older things.
> 
> Ken
>