diff --git a/src/Makefile b/src/Makefile
index e980c91..ad93c7c 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,15 +1,21 @@
-CFLAGS=-Wall -Wextra -O0 -g -ggdb -std=c99 -pedantic
+CFLAGS=-Wall -Wextra -O0 -g -std=c99 -pedantic -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security
+CPPFLAGS=-D_FORTIFY_SOURCE=2
+LDFLAGS=-shared -fPIC -Wl,-z,relro -L.
 
-all: util
+all: lib util
 
 %.o: %.c
-	gcc $(CFLAGS) -c $<
+	gcc $(CFLAGS) $(CPPFLAGS) -c $<
 
-util: util.c database.o bitmap.o
-	gcc $(CFLAGS)         -o $@ $^
-	gcc $(CFLAGS) -static -o $@-static $^
+lib: database.o bitmap.o
+	gcc $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -Wl,-soname,libimgdup.so.1 -o libimgdup.so $^
+
+util: util.c
+	gcc $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -limgdup         -o $@ $^
+	gcc $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -limgdup -static -o $@-static $^
 
 clean:
 	rm -f *.o
 	rm -f util
 	rm -f util-static
+	rm -f libimgdup*