Now it's working. My Makefile: OBJS = test.o MODULES = test DATA = test.c PG_CONFIG = pg_config PGXS := $(shell $(PG_CONFIG) --pgxs) include $(PGXS) Is it possible to execute the code just like this? I like to do that for Debugging. I can't execute the .so files, of course and If I just do "gcc filename", I have the issue with the includes. Janek Sendrowski -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general