Hi Grégoire, > ./configure Unless something has changed for 4.2.1 that I'm unaware, this is not supported -- and not recommended -- as per the configuration instructions: http://gcc.gnu.org/install/configure.html I do not know if the warnings you are running into are related or not. If you want to try to configure and build in a different directory from the source tree directory structure, you will need to un-tar the source fresh, since the GCC source may be in a corrupted state. HTH, --Eljay
