rebuild a package without an update

[Riccardo Mottola via macports-users]

Hi,

I need to rebuild a package which is not working due to a dependency 
upgrde. revdep "catches" it but revdep fails to build it because it uses 
the wrong compiler and I need to force it (also because the compiler 
itself is broken because it is broken because the library is broken....)

I usually in these cases just run "port upgrade xxxx 
configure.compiler=xxx" but in this case there is nothing to upgrade, I 
need to rebuild in place.

How can I do?

Riccardo