Some systems have a diff without a -u option. Test for it.

git-svn-id: svn://vcs.exim.org/pcre/code/trunk@339 2f5784b3-3f2a-0410-8824-cb99058d5e15

1 files changed, 9 insertions, 3 deletions

diff --git a/RunTest b/RunTest
index 5dc380b..f9960ac 100755
--- a/RunTest
+++ b/RunTest
@@ -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