Linking ECPG files to a C program

G'Day !

I have a very confusing problem.

I am trying to link files using a ECPG interface to a postgresql database
to a vector drawing program.

My test programs (when compiled by hand) work great, but when I use a
makefile to compile the modules and the regular C program, the linker gives
me undefined references to the ECPG routines.

I am using suffix rules in my Makefile as follows:

.pgc.c:
ecpg -t $(PG_INC) $< $*.c

.c.o:
$(CC) -c ($PG_INC) $(CFLAGS) $< -o $*.o

test_db: $(DB_OBJS) $(TEST_OBJS)
$(CC) $(GTKLIB) $(LIBS) -o test_db $(DB_OBJS) $(TEST_OBJS)

Should I create a library to hold the ECPG routines ?

Does anyone have any example code/Makefile I can look at ?

TIA

cheers,
Jim Parker