>tar xjf gcc-4.0.0.tar.bz2 Do not use gcc-4.0.0, use current snapshot of 4.0 branch, http://mirrors.kernel.org/sourceware/gcc/snapshots/4.0-20050616/ or, better, use gcc-4.0 package which is in unstable. >/usr/bin/ld: cannot find -lc To fix that, either configure gcc with --disable-multilib, or install ia32-libs-dev package