Reinstall all ports after Xcode 4.1 -> 4.2 upgrade?

[Scott Webster]

On Wed, Nov 23, 2011 at 5:36 AM, Christoph Deil
<deil.christoph at googlemail.com> wrote:
> I'd also be interested to understand why exactly this is / isn't necessary, given that ports are built with the Macports compilers, but these themselves are build with the XCode compilers.
>

Note that most ports are built with the XCode compilers... they are
only built with macports compilers in certain circumstances.  That's
my understanding anyway.

Scott