diff --git a/src/global.mk b/src/global.mk
index 52b1c3e..44efeca 100644
--- a/src/global.mk
+++ b/src/global.mk
@@ -1,6 +1,18 @@
-
 MACHINE=MAC_OS_X
+LIBPATH= -Llibapat -LlibecoPCR
+MAKEDEPEND = gcc -D$(MACHINE) -M $(CPPFLAGS) -o $*.d $<
+
+CC=gcc
+CFLAGS= -W -Wall -O2 -g
+
+default: all
 
 %.o: %.c
-	gcc -D$(MACHINE) -c -O2 -o $@ $<
-	
\ No newline at end of file
+	$(CC) -D$(MACHINE) $(CFLAGS) -c -o $@ $<
+
+%.P : %.c
+	$(MAKEDEPEND)
+	@sed 's/\($*\)\.o[ :]*/\1.o $@ : /g' < $*.d > $@; \
+	rm -f $*.d; [ -s $@ ] || rm -f $@
+
+include $(SRCS:.c=.P)
\ No newline at end of file