From 2ee885572e88f9437653b98fe4fc72d1921e8861 Mon Sep 17 00:00:00 2001
From: Mike Hommey <mh+mozilla@glandium.org>
Date: Wed, 23 Mar 2016 09:48:38 +0900
Subject: [PATCH] Bug 1258785 - Return a None value when check_prog doesn't
 find a program. r=ted

---
 build/moz.configure/checks.configure | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/build/moz.configure/checks.configure b/build/moz.configure/checks.configure
index a1640405c797..e1e79ebf0484 100644
--- a/build/moz.configure/checks.configure
+++ b/build/moz.configure/checks.configure
@@ -75,5 +75,6 @@ def check_prog(var, progs, allow_missing=False):
             from mozbuild.shellutil import quote
             error('Cannot find %s (tried: %s)'
                   % (var.lower(), ', '.join(quote(p) for p in progs)))
+        return None if value is not_found else value
 
-    return check
+    return postcheck