Fix ordering.

[pintos-anon] / grading / userprog / Makefile

diff --git a/grading/userprog/Makefile b/grading/userprog/Makefile
index 0a09f5ae7353fc6fe09dc3afaedf763e751c44a4..2b9669450ea2d0db98c1ed65659771fd79139032 100644 (file)
--- a/grading/userprog/Makefile
+++ b/grading/userprog/Makefile
@@ -76,10 +76,15 @@ child_arg_SRC = child-arg.c
 child_bad_SRC = child-bad.c
 child_close_SRC = child-close.c
 
-DISKS = $(patsubst %,%.dsk,$(TESTS))
+DISKS = $(patsubst %,%.dsk,$(TESTS)) null.dsk
 
 disks: $(DISKS)
 
+null.o: null.S
+null: null.o
+       $(CC) $(LDFLAGS) $^ $(LDLIBS) -o $@
+null.dsk: null 
+
 exec-once.dsk exec-multiple.dsk join-simple.dsk join-twice.dsk: child-simple
 exec-arg.dsk: child-arg
 join-killed.dsk: child-bad
@@ -93,6 +98,8 @@ clean::
 
 include $(SRCDIR)/Makefile.userprog
 
+# Use -Werror because otherwise there's so much output spew
+# that it's very difficult to pick out warnings.
 CFLAGS += -Werror
 
 Makefile: Make.base Make.tests mkmf