Index: CMakeLists.txt
--- CMakeLists.txt.orig
+++ CMakeLists.txt
@@ -180,7 +180,7 @@ add_cflag("-fno-common")
 # Fix GNU stack
 if(CMAKE_C_COMPILER_ID MATCHES "GNU")
     # Have ld strip the symbols from Release and MinSizeRel build types.
-    set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -Os")
+    set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} ")
     set(CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_C_FLAGS_MINSIZEREL} -Os -s")
 
     if(LINUX)
@@ -216,7 +216,7 @@ elseif(CMAKE_C_COMPILER_ID MATCHES "Clang")
     endif()
 
     # Have ld strip the symbols from Release and MinSizeRel build types. (-Oz is clang specific)
-    set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -Os")
+    set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} ")
     set(CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_C_FLAGS_MINSIZEREL} -Oz -s")
 
     if(FREEBSD)