Was using MinGW which was always working fine so far, when wanted to update it. Removed it, and then downloaded the last one to install it.
Unfortunately, it seems the new installer cannot install it properly, as running GCC 4.5 always ends in a complaint : “cannot find gmp-3.dll”. I could not find this gmp-3.dll anywhere, even at source-forge, and there is only a gmp-10.dll. I wanted to try a manual install, but not better.
If this GCC really requires a gmp-3.dll, then it should be provided by the installer or in the downloadable file at source-forge. Or else, may be the installer install a wrong GCC.
Is there a link to get the old MinGW which was working fine by the way ? (I removed the one I was using)