Hey guys I have a very serious problem, I was currently building a cross compiler with gcc and gcc did not build correctly however I already had a previous version of gcc on the system (gcc 4.5.3) which was completely functional, now after my build failed with gcc 4.7.0, my old gcc compiler seems not to work any more since my targets and paths all point to the broken gcc. If I issue the gcc -v command I get the following message:

Using built-in specs.
COLLECT_GCC=gcc
Target: x86_64-unknown-linux-gnu
Configured with: ../sources/gcc-4.7.0/configure --target= --prefix= --without-headers --with-newlib -v
Thread model: posix
gcc version 4.7.0 (GCC)

The sources folder with gcc 4.7.0 no longer exists, I am wondering if there is any way to go back to the previous working version of gcc and remove all traces of the broken one!

Please any help will be appreciated!

Generally : You can have as many versions of gcc as you want,
installed at the same time.
( If they all are in e.g. /usr/, the option '--program-suffix='
must to be used. Example: --program-suffix=47 will provide gcc47, g++47).

Only the binaries can have convergent names / locations.
(gcc cc g++ c++ libgcc_s*).
All other files have unique locations like /usr/lib/gcc/<??>/4.7.0/<?>

A reinstall of any previous version will overwrite the gcc-4.7.0 binaries.
If the same '--prefix=$PREFIX' is used again, e.g. --prefix=/usr/

.