Prioritize local includes and libraries

This fixes #35.

mk/prog.mk

@@ -1,4 +1,4 @@
-# rules to build a library
+# rules to build a program
 # based on FreeBSD's bsd.prog.mk
 
 # Copyright (c) 2008 Roy Marples <roy@marples.name>
@@ -25,10 +25,10 @@ CLEANFILES+=		${OBJS} ${PROG}
 all: depend ${PROG}
 
 %.o: %.c
-	${CC} ${CFLAGS} ${CPPFLAGS} -c $< -o $@
+	${CC} ${LOCAL_CFLAGS} ${LOCAL_CPPFLAGS} ${CFLAGS} ${CPPFLAGS} -c $< -o $@
 
 ${PROG}: ${SCRIPTS} ${OBJS}
-	${CC} ${CFLAGS} ${LDFLAGS} -o $@ ${OBJS} ${LDADD}
+	${CC} ${LOCAL_CFLAGS} ${LOCAL_LDFLAGS}  ${CFLAGS} ${LDFLAGS} -o $@ ${OBJS} ${LDADD}
 
 clean:
 	rm -f ${CLEANFILES}