From d1d4ea370080589ef7b6d891fdf70d433485187c Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Sun, 18 Aug 2013 11:58:23 -0400
Subject: lib/*.sh, lib/*/*.sh: Rewrite include guards.

This is one step toward adding `set -u` to opkbuild.
---
(limited to 'lib/common.sh')

diff --git a/lib/common.sh b/lib/common.sh
index 3fd3cc5..c2a0030 100644
--- a/lib/common.sh
+++ b/lib/common.sh
@@ -17,8 +17,8 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-[ -n "${_OB_COMMON_SM}" ] && return 0
-_OB_COMMON_SM='true'
+[ x"${_OB_COMMON_SM+set}" = x'set' ] && return 0
+_OB_COMMON_SM=1
 
 _ob_validate_var_name()
 {
--
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