--- CMakeLists.txt.orig	2019-09-21 02:09:21 UTC
+++ CMakeLists.txt
@@ -178,8 +178,7 @@ add_cflag("-fPIC")
 # 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 "${CMAKE_C_FLAGS_RELEASE} -Os")
-    set(CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_C_FLAGS_MINSIZEREL} -Os -s")
+    set(CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_C_FLAGS_MINSIZEREL} -s")
 
     if(LINUX)
         # enable Link Time Optimization on gcc (linux only currently)
@@ -214,8 +213,7 @@ 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 "${CMAKE_C_FLAGS_RELEASE} -Os")
-    set(CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_C_FLAGS_MINSIZEREL} -Oz -s")
+    set(CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_C_FLAGS_MINSIZEREL} -s")
 
     if(FREEBSD)
         set(LIBRARIES ${LIBRARIES} "cxxrt")