tsah marco wrote: > 1) how do i know if my OS fedora-8 is 64bit > based(because i install x86_64 version DVD) e.g. uname -a > 2) i believe gcc version 4.1.0 support 64 bit ,is it true? certainly > make[2]: *** No rule to make target > `/opt/gcc/second_gcc-4.1.0//bin/x86_64-pc-linux-gnu-as', needed by > `stamp-as'. Stop. If you're simply rebuilding gcc, you should have already installed the 64-bit gcc development system, including as. It would be part of the base gcc system in 64-bit FC8.