$OpenBSD: patch-CMakeLists_txt,v 1.1 2017/01/25 09:58:03 kirby Exp $
--- CMakeLists.txt.orig	Wed Jan 25 10:45:31 2017
+++ CMakeLists.txt	Wed Jan 25 10:45:58 2017
@@ -64,7 +64,7 @@ elseif(WIN32)
 endif()
 
 if(CMAKE_COMPILER_IS_GNUCXX OR MINGW OR ${CMAKE_CXX_COMPILER_ID} STREQUAL "Clang")
-    add_compile_options(-std=c++11 -W -Wall -O3 -pedantic)
+    add_compile_options(-std=c++11 -W -Wall -pedantic)
     add_compile_options(-fomit-frame-pointer -finline-functions -ffast-math)
 elseif(MSVC)
     add_definitions(-DNOMINMAX)
