Ronald Bianchin wrote:

I've a problem with install gpc. After unpack gpc-19990118 I've move the files to /opt/gpc, copy /p/* to gcc/p/* and execute patch -s -p1 < p/diffs/gcc-2.8.1.diff.

You have to unpack the sources of GCC in a matching version before. There are several possible versions as shown in the diff file names.

Frank