Index: external/squirrel/CMakeLists.txt
--- external/squirrel/CMakeLists.txt.orig
+++ external/squirrel/CMakeLists.txt
@@ -14,9 +14,7 @@ include_directories(${CMAKE_CURRENT_SOURCE_DIR}/includ
 if(CMAKE_COMPILER_IS_GNUCXX)
   set(SQ_FLAGS -fno-exceptions -fno-strict-aliasing -Wall -Wextra -pedantic -Wcast-qual)
 
-  if(CMAKE_BUILD_TYPE STREQUAL "Release")
-    set(SQ_FLAGS ${SQ_FLAGS} -O3)
-  elseif(CMAKE_BUILD_TYPE STREQUAL "RelWithDebInfo")
+  if(CMAKE_BUILD_TYPE STREQUAL "RelWithDebInfo")
     set(SQ_FLAGS ${SQ_FLAGS} -O3 -g)
   elseif(CMAKE_BUILD_TYPE STREQUAL "MinSizeRel")
     set(SQ_FLAGS ${SQ_FLAGS} -Os)
