On Wed, 3 Jul 2019 at 09:42, Dorian ROSSE <dorianbrice@xxxxxxxxxx> wrote: > I was think It is better to use laster gcc than the gcc GitHub repositorie > mirror from git gcc ! > > Laster command line was the following : > > > > *../gcc-9.1.0/configure --enable-languages=c,c++,go && make && make > install *Now I install isl dependencies ! > ISL is an optional dependency, you don't need it. Please read https://gcc.gnu.org/wiki/InstallingGCC and ensure you either install dependencies using your system's package manager, or use the ./contrib/download_prerequisites script. > Then I launch again ‘configure’ command line 😊 > You should start in an empty directory each time you run it. If you run configure and the build fails, and then re-run configure with different arguments or different environment, it's likely to fail again. Remove everything in the build directory and start clean each time.