On Thu, Apr 3, 2008 at 5:46 AM, Rupert Wood <me@xxxxxxxxx> wrote: > Marek wrote: ... > To overwrite your existing GCC system you need to use "--prefix=/usr" on the compile I have used multiple versions of gcc for years (mostly under redhat/fedora) and have had good luck with installing a new version under the default /usr/local but using the configure option '--program-suffix=-X.Y.Z' where the 'X.Y.Z' is the version number. Then i can use 'gcc-X.Y.Z' or the default 'gcc' as desired, and I've never had any conflicts beteen the various versions. -Tom P.S. And as Rup mentioned, I NEVER build in the gcc source directory.