gcc43

Hi, I have the latest macports installed on a 2 Intel Core2 Duo mac, Mac OSX 10.4.10. I would like to build for target Core2Duo, which with gcc is available on 4.3 (will also use OpenMP) For gcc42, I did sudo port install gcc42 However, the resulting gcc-mp-4.2 was with: cross-build option =0 its target was i386-darwin So I could only build my program for that target. How can I use "port" to perhaps configure gcc43 before its build? Rds,