From 0a56e643b13cfb1cb5546a3ff0ae962f93ce8602 Mon Sep 17 00:00:00 2001
From: Travis Cross <tc@traviscross.com>
Date: Mon, 5 May 2014 21:38:52 +0000
Subject: [PATCH] Avoid training :'s in paths

When the path was empty, path_push_unique would cause a training colon
to be added.  This was a known issue that didn't cause any harm, but
while we're here, we'll clean this up.
---
 configure.ac | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 39e8063276..10087e3b0b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -607,7 +607,11 @@ path_remove () {
 path_push_unique () {
   x="$(eval echo \$$1)"
   x="$(path_remove "$x" "$2")"
-  eval export $1="$2:$x"
+  if test -z "$x"; then
+    eval export $1="$2"
+  else
+    eval export $1="$2:$x"
+  fi
 }
 
 # tweak platform specific flags