hook up SWIFT_STDLIB_TRACING arg to Core cmake

Author: justice-adams-apple

Runtimes/Core/CMakeLists.txt

@@ -88,7 +88,7 @@ defaulted_option(SwiftCore_ENABLE_STATIC_PRINT "Disable full print")
 defaulted_option(SwiftCore_ENABLE_UNICODE_DATA "Embed Unicode info in Swift Core")
 defaulted_option(SwiftCore_ENABLE_COMPACT_ABSOLUTE_FUNCTION_POINTERS "Resolve absolute function pointer as identity")
 defaulted_option(SwiftCore_ENABLE_BACKDEPLOYMENT_SUPPORT "Add symbols for runtime backdeployment")
-
+defaulted_option(SwiftCore_ENABLE_STDLIB_TRACING "Enable tracing in the runtime. Assumes the presence of os_log(3) and the os_signpost(3) API.")
 defaulted_option(SwiftCore_ENABLE_BACKTRACING "Enable backtracing runtime support")
 defaulted_set(SwiftCore_BACKTRACER_PATH STRING "Set a fixed path to the Swift backtracer")
 
@@ -115,6 +115,8 @@ add_compile_definitions(
   $<$<BOOL:${SwiftCore_ENABLE_UNICODE_DATA}>:-DSWIFT_STDLIB_ENABLE_UNICODE_DATA> # Stubs
   $<$<BOOL:${SwiftCore_ENABLE_ENVIRONMENT}>:-DSWIFT_STDLIB_HAS_ENVIRON> # Concurrency, runtime, shims, platform overlay
   $<$<BOOL:${SwiftCore_ENABLE_BACKDEPLOYMENT_SUPPORT}>:-DSWIFT_STDLIB_SUPPORT_BACK_DEPLOYMENT> # Concurrency, Compatibility override, magic symbols
+  $<$<BOOL:${SwiftCore_ENABLE_STDLIB_TRACING}>:-DSWIFT_STDLIB_TRACING>
+  $<$<BOOL:${SwiftCore_ENABLE_STDLIB_TRACING}>:-DSWIFT_STDLIB_CONCURRENCY_TRACING>
   $<$<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}>>)