From 056ad310640ef13784ba1c00b90283e0cc6ba9a6 Mon Sep 17 00:00:00 2001
From: Pieter Wuille <pieter.wuille@gmail.com>
Date: Tue, 9 Dec 2014 11:48:34 +0100
Subject: [PATCH] Really compile with -O3 by default

---
 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index c65d6159fd9..fb55301f263 100644
--- a/configure.ac
+++ b/configure.ac
@@ -18,7 +18,7 @@ AC_PATH_TOOL(AR, ar)
 AC_PATH_TOOL(RANLIB, ranlib)
 AC_PATH_TOOL(STRIP, strip)
 
-if test -z $CFLAGS; then
+if test "x$CFLAGS" = "x"; then
   CFLAGS="-O3 -g"
 fi