Index: src/Tests/SynTree/make-rules
===================================================================
--- src/Tests/SynTree/make-rules	(revision 44b5ca043a6e8e4574929a092ba5d3004b59264d)
+++ src/Tests/SynTree/make-rules	(revision 8a95629f07fa647caf0004c609a305c6db9b1816)
@@ -1,21 +1,20 @@
 CFA = ../../cfa-cpp
 
-DIFF = diff#/software/gnu/bin/diff
+EXPECTED := ${wildcard ${EXPECTDIR}/*.tst}
+TESTS := ${EXPECTED:${EXPECTDIR}/%=${OUTPUTDIR}/%}
+TEST_IN := ${TESTS:.tst=.c}
 
-# Basic SynTree printing
-EXPECTED := ${wildcard $(EXPECTDIR)/*.tst}
-TESTS := $(EXPECTED:$(EXPECTDIR)/%=$(OUTPUTDIR)/%)
-TEST_IN := $(TESTS:.tst=.c)
+.SILENT :
 
-$(OUTPUTDIR)/%.tst : %.c $(CFA)
-	$(CFA) $(CFAOPT) < $< > $@ 2>&1
+${OUTPUTDIR}/%.tst : %.c ${CFA}
+	-${CFA} ${CFAOPT} < $< > $@ 2>&1
 
-$(OUTPUTDIR)/report : $(TESTS) $(EXPECTED)
+${OUTPUTDIR}/report : ${TESTS} ${EXPECTED}
 	rm -f $@
-	@for i in $(TESTS); do \
+	@for i in ${TESTS}; do \
 	     echo "---"`basename $$i`"---" | tee -a $@; \
-	     $(DIFF) -B -w $(EXPECTDIR)/`basename $$i` $$i | tee -a $@; \
+	     diff -B -w ${EXPECTDIR}/`basename $$i` $$i | tee -a $@; \
 	done
 
 clean :
-	rm -rf $(OUTPUTDIR)
+	rm -rf ${OUTPUTDIR}