[PATCH] Let the default compiler be configurable

[Ryan Schmidt]

On Jun 9, 2011, at 22:01, Ryan Schmidt wrote:

> We'll probably still get people who migrate their old macports.conf to a new machine, and cause new problems due to using an older compiler. Hopefully most users will notice.

Maybe it would be good to print a message, at least at the debug level, indicating when the user's chosen compiler does not match the OS default compiler.