From 455e827e1ea3688454109de140259da4d1444fe9 Mon Sep 17 00:00:00 2001
From: Tsuda Kageyu <tsuda.kageyu@gmail.com>
Date: Mon, 15 Feb 2016 02:18:42 +0900
Subject: [PATCH] Explicitly set a false flag in ConfigureChecks.cmake.

---
 ConfigureChecks.cmake | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ConfigureChecks.cmake b/ConfigureChecks.cmake
index 6f3c82ec..0f2b6d87 100644
--- a/ConfigureChecks.cmake
+++ b/ConfigureChecks.cmake
@@ -57,6 +57,8 @@ if(NOT HAVE_STD_ATOMIC)
   find_package(Boost COMPONENTS atomic)
   if(Boost_ATOMIC_FOUND)
     set(HAVE_BOOST_ATOMIC 1)
+  else()
+    set(HAVE_BOOST_ATOMIC 0)
   endif()
 
   if(NOT HAVE_BOOST_ATOMIC)