--- a/contrib/compare_tests	Fri Oct 27 22:46:09 2017 +0900
+++ b/contrib/compare_tests	Thu Oct 25 07:37:49 2018 +0900
@@ -36,17 +36,18 @@
 
 tool=gxx
 
-tmp1=/tmp/$tool-testing.$$a
-tmp2=/tmp/$tool-testing.$$b
-now_s=/tmp/$tool-testing.$$d
-before_s=/tmp/$tool-testing.$$e
-lst1=/tmp/$tool-lst1.$$
-lst2=/tmp/$tool-lst2.$$
-lst3=/tmp/$tool-lst3.$$
-lst4=/tmp/$tool-lst4.$$
-lst5=/tmp/$tool-lst5.$$
-sum1=/tmp/$tool-sum1.$$
-sum2=/tmp/$tool-sum2.$$
+TMPDIR=${TMPDIR:-/tmp}
+tmp1=$TMPDIR/$tool-testing.$$a
+tmp2=$TMPDIR/$tool-testing.$$b
+now_s=$TMPDIR/$tool-testing.$$d
+before_s=$TMPDIR/$tool-testing.$$e
+lst1=$TMPDIR/$tool-lst1.$$
+lst2=$TMPDIR/$tool-lst2.$$
+lst3=$TMPDIR/$tool-lst3.$$
+lst4=$TMPDIR/$tool-lst4.$$
+lst5=$TMPDIR/$tool-lst5.$$
+sum1=$TMPDIR/$tool-sum1.$$
+sum2=$TMPDIR/$tool-sum2.$$
 tmps="$tmp1 $tmp2 $now_s $before_s $lst1 $lst2 $lst3 $lst4 $lst5 $sum1 $sum2"
 
 [ "$1" = "-strict" ] && strict=$1 && shift
@@ -128,7 +129,8 @@
 
 grep -s . $tmp2 >/dev/null
 if [ $? = 0 ]; then
-	echo "Tests that now fail, but worked before:"
+	num=`cat $tmp2 | wc -l`
+	echo "Tests that now fail, but worked before ($num tests):"
 	echo
 	cat $tmp2
 	echo
@@ -140,7 +142,8 @@
 
 grep -s . $tmp2 >/dev/null
 if [ $? = 0 ]; then
-	echo "Tests that now work, but didn't before:"
+	num=`cat $tmp2 | wc -l`
+	echo "Tests that now work, but didn't before ($num tests):"
 	echo
 	cat $tmp2
 	[ -n "$strict" ] && echo "Strict test fails" && exit_status=1
@@ -152,7 +155,8 @@
 
 grep -s . $tmp2 >/dev/null
 if [ $? = 0 ]; then
-	echo "New tests that FAIL:"
+	num=`cat $tmp2 | wc -l`
+	echo "New tests that FAIL ($num tests):"
 	echo
 	cat $tmp2
 	echo
@@ -164,7 +168,8 @@
 
 grep -s . $tmp2 >/dev/null
 if [ $? = 0 ]; then
-	echo "New tests that PASS:"
+	num=`cat $tmp2 | wc -l`
+	echo "New tests that PASS ($num tests):"
 	echo
 	cat $tmp2
 	[ -n "$strict" ] && echo "Strict test fails" && exit_status=1
@@ -176,7 +181,8 @@
 
 grep -s . $tmp2 >/dev/null
 if [ $? = 0 ]; then
-	echo "Old tests that passed, that have disappeared: (Eeek!)"
+	num=`cat $tmp2 | wc -l`
+	echo "Old tests that passed, that have disappeared ($num tests): (Eeek!)"
 	echo
 	cat $tmp2
 	[ -n "$strict" ] && echo "Strict test fails" && exit_status=1
@@ -188,7 +194,8 @@
 
 grep -s . $tmp2 >/dev/null
 if [ $? = 0 ]; then
-	echo "Old tests that failed, that have disappeared: (Eeek!)"
+	num=`cat $tmp2 | wc -l`
+	echo "Old tests that failed, that have disappeared ($num tests): (Eeek!)"
 	echo
 	cat $tmp2
 	[ -n "$strict" ] && echo "Strict test fails" && exit_status=1