TalGloz <glozmantal@xxxxxxxxx> writes: > I've searched information about my problem in the archives and on the > internet, but it didn't help. I have this small myfunc.cpp > [ that doesn't work ] > 16: #ifdef PG_MODULE_MAGIC > 17: PG_MODULE_MAGIC; > 18: #endif Hmm ... don't use an #ifdef there. If you don't have the macro defined, you want to fail, not silently build an extension without it. It's possible you need extern "C" { ... } around the macro, too. regards, tom lane