From 915781381e8d62255f56f3b0d0e7066bc8ee94c2 Mon Sep 17 00:00:00 2001
From: Andreas Schneider <asn@cryptomilk.org>
Date: Tue, 22 Jan 2013 16:28:25 +0100
Subject: [PATCH] BUG 99: Fix string function if no build type is set.

---
 cmake/Modules/DefineCompilerFlags.cmake | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmake/Modules/DefineCompilerFlags.cmake b/cmake/Modules/DefineCompilerFlags.cmake
index d2315721..0283b12f 100644
--- a/cmake/Modules/DefineCompilerFlags.cmake
+++ b/cmake/Modules/DefineCompilerFlags.cmake
@@ -26,7 +26,7 @@ if (UNIX AND NOT WIN32)
             set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fstack-protector")
         endif (WITH_STACK_PROTECTOR)
 
-        string(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_LOWER)
+        string(TOLOWER "${CMAKE_BUILD_TYPE}" CMAKE_BUILD_TYPE_LOWER)
         if (NOT CMAKE_BUILD_TYPE_LOWER MATCHES debug)
             check_c_compiler_flag("-D_FORTIFY_SOURCE=2" WITH_FORTIFY_SOURCE)
             if (WITH_FORTIFY_SOURCE)