On 15 February 2013 14:07, Bharath Ramesh wrote: > > Fair enough. Here is my second attempt. Here are the commands I executed > $ tar xvf /home/bramesh/downloads/gcc-4.7.2.tar.bz2 > > $ cd gcc-4.7.2 > $ ./contrib/download_prerequisites > $ wget ftp://gcc.gnu.org/pub/gcc/infrastructure/cloog-0.18.0.tar.gz > $ tar xvf cloog-0.18.0.tar.gz > $ ln -sf cloog-0.18.0 cloog The http://gcc.gnu.org/install/prerequisites.html does not say that CLooG can be built by putting the sources in the GCC dir, the way GMP, MPFR and MPC can be. Maybe it can, I don't know, but the docs don't say it can be. Since doing that isn't working for you, maybe you should try installing CLooG separately (which I think means installing GMP separately) There's no need to ask to be CC'd in replies, doing so is standard practice.