From e530bc13dcdf14b1e9bb27d0ecbcac27ce7d47ef Mon Sep 17 00:00:00 2001
From: Mark Andrews <marka@isc.org>
Date: Fri, 13 Jun 2014 11:45:08 +1000
Subject: [PATCH] fix test to see if $PERL is set

(cherry picked from commit 44f0f310d41acc5c772d38353fe35ddacb3fee80)
---
 bin/tests/system/run.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bin/tests/system/run.sh b/bin/tests/system/run.sh
index c76805db14..9e1e5c2120 100644
--- a/bin/tests/system/run.sh
+++ b/bin/tests/system/run.sh
@@ -39,7 +39,7 @@ echo "S:$test:`date`" >&2
 echo "T:$test:1:A" >&2
 echo "A:System test $test" >&2
 
-if [ x$PERL = x ]
+if [ x${PERL:+set} = x ]
 then
     echo "I:Perl not available.  Skipping test." >&2
     echo "R:UNTESTED" >&2