From b1e3a3c874b9bab32cc56820ae3e3d568c120181 Mon Sep 17 00:00:00 2001
From: Wei Liu <wl@xen.org>
Date: Tue, 2 Jun 2020 17:32:02 +0000
Subject: [PATCH] tools: update configure

Fixes: e181db8ba4e0 ("m4: use test instead of []")
Signed-off-by: Wei Liu <wl@xen.org>
---
 tools/configure | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/configure b/tools/configure
index 35036dc1db..3df1a01ff9 100755
--- a/tools/configure
+++ b/tools/configure
@@ -4688,7 +4688,7 @@ for ldflag in $APPEND_LIB
 do
     APPEND_LDFLAGS="$APPEND_LDFLAGS -L$ldflag"
 done
-if  ! -z $EXTRA_PREFIX ; then
+if test ! -z "$EXTRA_PREFIX" ; then
     CPPFLAGS="$CPPFLAGS -I$EXTRA_PREFIX/include"
     LDFLAGS="$LDFLAGS -L$EXTRA_PREFIX/lib"
 fi
-- 
2.30.2