the patch file I extracted does not contain any actual patches (file length 563 bytes, it is appended to that mail). However, I found the mkpatch file. Am I supposed to generate the patch first; if so what does the switch -U3 do (my diff does not know such a switch and hence fails). I am trying to install GPC on a Solaris (UNIX) system, I have got all the sources from GPC and GCC, so what am I supposed to do (I did read the INSTALL but as I said did not get that far)? Any help/info/suggestions/abuse much appreciated Robert