On 9 February 2013 13:08, Mahmood Naderan wrote: > Sorry I forgot to say that when I go to the root directory (/opt/gcc-4.1.2) and type "make uninstall", I receive > > the uninstall target is not supported in this tree > > > I ran ./configure && make from there. So why should I receive that message? See http://gcc.gnu.org/install/ "Please note that GCC does not support `make uninstall' and probably won't do so in the near future as this would open a can of worms. Instead, we suggest that you install GCC into a directory of its own and simply remove that directory when you do not need that specific version of GCC any longer, and, if shared libraries are installed there as well, no more binaries exist that use them."