[CMake] Disable RTTI and exceptions in stdlib

The C++ runtime bits should not have RTTI or exceptions enabled.
Disabling those now, but keeping the unwind tables to match the old
build.

Author: etcwilde

Runtimes/Core/CMakeLists.txt

@@ -118,7 +118,11 @@ add_compile_definitions(
   $<$<COMPILE_LANGUAGE:C,CXX>:-DSWIFT_RUNTIME_ENABLE_LEAK_CHECKER=$<BOOL:${SwiftCore_ENABLE_RUNTIME_LEAK_CHECKER}>>
   $<$<COMPILE_LANGUAGE:C,CXX>:-DSWIFT_RUNTIME_CLOBBER_FREED_OBJECTS=$<BOOL:${SwiftCore_ENABLE_CLOBBER_FREED_OBJECTS}>>)
 
-add_compile_options($<$<AND:$<COMPILE_LANGUAGE:Swift>,$<BOOL:${SwiftCore_ENABLE_LIBRARY_EVOLUTION}>>:-enable-library-evolution>)
+add_compile_options(
+  $<$<COMPILE_LANGUAGE:CXX>:-fno-rtti>
+  $<$<COMPILE_LANGUAGE:CXX>:-fno-exceptions>
+  $<$<COMPILE_LANGUAGE:CXX>:-funwind-tables>
+  $<$<AND:$<COMPILE_LANGUAGE:Swift>,$<BOOL:${SwiftCore_ENABLE_LIBRARY_EVOLUTION}>>:-enable-library-evolution>)
 
 include_directories(include)