Makefile now creates .so files

makefile

@@ -1,20 +1,15 @@
-#Infos: http://www.ijon.de/comp/tutorials/makefile.html
-
-
 VERSION = 1.0
-CC      = /usr/bin/gcc
-CFLAGS  = -Wall -g -D_REENTRANT -DVERSION=\"$(VERSION)\" 
-#LDFLAGS = -lm -lpthread `gtk-config --cflags` `gtk-config --libs` -lgthread
+CFLAGS  = -Wall -g -D_REENTRANT -DVERSION=\"$(VERSION)\" -O3
 LDFLAGS = -lwiringPi -lm
 
-OBJ = gy521example.o libgy521.o
+all: lib test
 
-libgy521: $(OBJ)
-	$(CC) $(CFLAGS) -o gy521example $(OBJ) $(LDFLAGS)
-        
-%.o: %.c
-	$(CC) $(CFLAGS) -c $<
+lib: libgy521.o
+	cc -shared -o libgy521.so libgy521.o -lm -lwiringPi
 
+test: gy521example.o
+	cc -o test -L. gy521example.o -lgy521 -lwiringPi
+	
 .PHONY: clean
 clean:
 	rm -r *.o