Print a message if the default target is used.

diff --git a/tests/Makefile b/tests/Makefile
index e6a9c98b4f13c7fe73946825afc5ac20d71d70ad..af04b414c667e9520a6d1943b5e32a69cd1a4105 100644 (file)
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -2,6 +2,9 @@ TESTS = threads p1-1 p1-2 p1-3 list stdlib userprog p2 vm filesys
 
 PATH := $(shell pwd)/../src/utils:$(PATH)
 
+all:
+       @echo This Makefile has only `check' targets.
+
 check:
        $(MAKE) -C .. distclean
        for d in $(TESTS); do $(MAKE) $$d || exit 1; done