Makefiles with shared libs

I have a makefile that looks like this:

Code:

str_remove.o : str_remove.c
	gcc -c str_remove.c
	gcc -fPIC -shared -o libstr_remove.so str_remove.o
str_insert.o : str_insert.c
	gcc -c str_insert.c
	gcc -fPIC -shared -o libstr_insert.so str_insert.o
str_move.o : str_move.c str_remove.c str_insert.c
	gcc -c str_move.c str_remove.c str_insert.c
	gcc -fPIC -shared -o libstr_move.so str_move.o

remove and insert are fine, move has a problem. It doesnt use the shared libs just created and it rebuilds everything.

How should i do it?

Thanks

Yes, I think you have your dependancies mixed up. You have to answer what str_move.o depends on. It would seem to me to depend on libstr_remove.so libstr_insert.so yet these are not explicitly targets in the makefile. Perhaps you want

str_remove.o : str_remove.c
gcc -c str_remove.c

libstr_remove.so: str_remove.o
gcc -fPIC -shared -o libstr_remove.so str_remove.o

str_insert.o : str_insert.c
gcc -c str_insert.c

libstr_insert.so:
gcc -fPIC -shared -o libstr_insert.so str_insert.o

str_move.o : libstr_remove.so libstr_insert.so
gcc -c str_move.c
gcc -fPIC -shared -o libstr_move.so str_move.o

If this doesn't work try http://www.advancedlinuxprogramming.com/