--- CMakeLists.txt.orig	2022-09-27 05:17:27 UTC
+++ CMakeLists.txt
@@ -116,11 +116,11 @@ if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU"
     OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
   # XXX figure out how to get "-std=c++11 -fno-rtti" from LLVM.  That's how we
   # get those options in the Automake path...
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -fno-rtti -fno-strict-aliasing -Wall -Wextra -Wno-long-long -Wno-unused-parameter -Wno-missing-field-initializers")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti -fno-strict-aliasing -Wall -Wextra -Wno-long-long -Wno-unused-parameter -Wno-missing-field-initializers")
   if(SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility-inlines-hidden")
   endif()
-  set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3")
+#  set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3")
 endif()
 
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