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Which GCC version?

Gcc version given in GPC site's download tree

Which one? There are several ones.

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GPC contains a GCC patch which, among other things, declares these two variables. So I suppose it was not applied. Normally, it is automatically applied when you run configure (and you get a confirmation request). Did you run configure (again) after putting in the GPC sources, and did you use with `--enable-languages=pascal' option?

I did what is written in install file. Where is the patch file?

The patch file is included with GPC. When you ran `configure --enable-languages=pascal', did you get a message about patching?

PS: Your reply was sent to me personally. Please make sure to reply to the list ("group reply").

Frank