port install various gcc - XCode effects?

[Michael Brian Bentley]

I expect that the answer is no, but I'm asking anyway just in case.

Apple has their version 3.3, 4.0.1 and later builds of gcc. If I 
install gcc 3.4.6 and gcc 4.1.1 (not 4.1.2?) using MacPorts, will 
doing so confuse XCode or XCode-based project builds?

Thanks,

-Mike