olhem o que acontece
root@ubuntup4:/downloads/gcc-4.0.2# ./configure
loading cache ./config.cache
checking host system type... i686-pc-linux-gnuoldld
checking target system type... i686-pc-linux-gnuoldld
checking build system type... i686-pc-linux-gnuoldld
checking for a BSD compatible install... /usr/bin/install -c
checking whether ln works... yes
checking whether ln -s works... yes
configure: error: Building in the source directory is not supported in this release. See
http://gcc.gnu.org/install/configure.html for more details.
root@ubuntup4:/downloads/gcc-4.0.2#