From 3e53e84c1aa150e0770033950b5e01239e3b2896 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matthias=20Mail=C3=A4nder?= <matthias@mailaender.name>
Date: Mon, 26 May 2014 15:19:37 +0200
Subject: [PATCH] abort earlier and harden against syntax errors

---
 configure | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/configure b/configure
index 1ae9b32871..215097fd30 100755
--- a/configure
+++ b/configure
@@ -2,7 +2,7 @@
 # Use Linux system dependencies where possible, but take into account different .so names.
 
 os=`uname`
-if [ $os == 'Linux' ]; then
+if [ "$os" == 'Linux' ]; then
 	locations=(/usr/lib /usr/lib64 /usr/local/lib /opt/lib)
 	sonames=(liblua5.1.so.5.1 liblua5.1.so.0 liblua.so.5.1 liblua-5.1.so liblua5.1.so)
 	for location in "${locations[@]}" ; do
@@ -10,11 +10,11 @@ if [ $os == 'Linux' ]; then
 			if [ -f $location/$soname ]; then
 				liblua51=$soname
 				echo "Detected Lua 5.1 library at "$location/$soname
-				break
+				break 2
 			fi
 		done
 	done
-	if [ -z $liblua51 ]; then
+	if [ -z "$liblua51" ]; then
 		echo "Lua 5.1 library detection failed."
 		exit 1
 	else