Hallo,
in the german IDE (Pelles C 6.00.4) under 'Projekt>Projektoptionen>Compiler'
there are two input lines which seem to define something. One is called 'Präprozessorbezeichner definieren' the other 'Definition von Präprozessorbezeichnern'. But the second is NOT to define something rather to undefine something. This should be changed.
I don't know who is the translater of the IDE-texts, so I post this here.
czerny