I have successfully built gcc v 4.2.1 on Cygwin on Windows XP. make -k check produces decent results for all the languages I know, as well as for ada (which I don't know but want to learn: fewer than 0.01% of the tests fail unexpectedly. The machine uses a dual core Athlon 64 processor. I tried passing something like -msse2 and -march=athlon64 to configure, but configure rejected these, claiming that there are no floags like these for the configure script. I found these flags in the gcc documentation, so I am confused. How do I tell configure to build executables optimized for my processor? Or does that not work well for cygwin on WXP on an AMD Athlon 64 X 2? Thanks Ted
