Hi. After several tries and a modicum of googling, I found that CFLAGS=-m64 ../gcc-4.4.0/configure --disable-multilib
was the magic incantation to get gcc to get into the second stage of the boostrap. This is on a Fedora Core 10 system. This seems to be an old issue; google turns things up dating back to 2003. I suspect that x86_64 systems are only going to be more popular with time; the build process on those systems needs to be as easy as for 32 bit systems. Thanks, Arnold Robbins (the gawk guy :-)