Since you don't have ane older version of gcc to compile the source you just downloaded, I would suggest downloading the rpm from fedoracore and install it that way. try:
http://mirror.web-ster.com/fedora/co....0.0-8.src.rpm
Or your fedora core mirror of choice.
then
Code:
rpmbuild --rebuild gcc-4.0.0-8.src.rpm
This will taylor the rpm to the kernel version you are using. (kernel source required) I belive it puts the new rpm in the /usr/src/redhat/RPMS directory. You will then need to install the rpm you just made.
Code:
rpm -Uvh gcc-4.0.0-8.rpm
regards,
...drkstr