port install various gcc - XCode effects?

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