[cmake] same for -fno-rtti

Author: h-vetinari

libunwind/CMakeLists.txt

@@ -230,6 +230,7 @@ set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
 set(CMAKE_REQUIRED_LINK_OPTIONS)
 add_compile_flags_if_supported(-funwind-tables)
 add_cxx_compile_flags_if_supported(-fno-exceptions)
+add_cxx_compile_flags_if_supported(-fno-rtti)
 set(CMAKE_TRY_COMPILE_TARGET_TYPE ${_previous_CMAKE_TRY_COMPILE_TARGET_TYPE})
 set(CMAKE_REQUIRED_LINK_OPTIONS ${_previous_CMAKE_REQUIRED_LINK_OPTIONS})
 
@@ -238,8 +239,6 @@ if (LIBUNWIND_USES_ARM_EHABI AND NOT CXX_SUPPORTS_FUNWIND_TABLES_FLAG)
                      "because this target uses ARM Exception Handling ABI")
 endif()
 
-add_cxx_compile_flags_if_supported(-fno-rtti)
-
 # Ensure that we don't depend on C++ standard library.
 if (CXX_SUPPORTS_NOSTDINCXX_FLAG)
   list(APPEND LIBUNWIND_COMPILE_FLAGS -nostdinc++)