According to Laussy Fabrice:
(why is the name now xgpc?)
After compilation, the name of the *driver program* is "xgpc". Installation ("make CFLAGS=-O LANGUAGES=pascal install") will rename it to "gpc".
Except my misunderstanding of something, the followings are types expected to be supported by the brand new GPC: [...] But none of them is accepted by the compilator (except Integer, [...]
Obviously, you only upgraded your driver program, not the actual compiler "gpc1" and the preprocessor "gpc-cpp". Typing "make CFLAGS=-O LANGUAGES=pascal install") will solve this problem.
Hope this helps,
Peter