--- code/trunk/RunTest	2007/09/17 09:38:32	247
+++ code/trunk/RunTest	2008/04/13 15:14:34	339
@@ -1,11 +1,17 @@
 #! /bin/sh
 
-# Run PCRE tests
+# Run PCRE tests. 
 
-cf="diff -u"
 valgrind=
-testdata=testdata
 
+# Set up a suitable "diff" command for comparison. Some systems
+# have a diff that lacks a -u option. Try to deal with this.
+
+if diff -u /dev/null /dev/null; then cf="diff -u"; else cf="diff"; fi
+
+# Find the test data
+
+testdata=testdata
 if [ -n "$srcdir" -a -d "$srcdir" ] ; then
   testdata="$srcdir/testdata"
 fi