scope of configure.optflags, configure.compiler etc. command line variables

[Ryan Schmidt]

On Sep 17, 2019, at 03:08, René J.V. Bertin wrote:

> I continue to think that compiler choice and options should be something the user can set the default for, without having to replace the standard system compiler drivers (/usr/bin/clang{,++}) with wrapper scripts.

As you know, we don't want the user to do that. Allow MacPorts to pick the compiler for a port. If it picks wrong for a particular port, fix the port by updating its compiler.blacklist setting.