CMake: Runtime: Enable tracing on Apple platforms

Adding tracing to concurrency, and enable tracing on the standard
library on Apple OSs.

rdar://164925172
(cherry picked from commit 01eb399)

Author: etcwilde

Runtimes/Core/CMakeLists.txt

@@ -106,10 +106,10 @@ defaulted_option(SwiftCore_ENABLE_RUNTIME_OS_VERSIONING "Enable runtime OS versi
 defaulted_option(SwiftCore_ENABLE_STATIC_PRINT "Disable full print")
 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_CONCURRENCY "Enable Concurrency runtime support")
 defaulted_option(SwiftCore_ENABLE_REMOTE_MIRROR "Enable RemoteMirror runtime support")
 defaulted_set(SwiftCore_CONCURRENCY_GLOBAL_EXECUTOR STRING "Default Concurrency global executor implementation")
+option(SwiftCore_ENABLE_STDLIB_TRACING "Enable tracing in the runtime. Assumes the precense of os_log(3) and the os_signpost(3) API." OFF)
 option(SwiftCore_ENABLE_COMMANDLINE_SUPPORT "Enable command line argument support" ON)
 option(SwiftCore_ENABLE_UNICODE_DATA "Include unicode data in Swift runtimes" ON)
 option(SwiftCore_ENABLE_SHORT_MANGLING_LOOKUPS "Build with fast-path context descriptor lookups based on well-known short manglings." ON)

Runtimes/Core/Concurrency/CMakeLists.txt

@@ -22,7 +22,6 @@ add_library(swift_Concurrency
   TaskLocal.cpp
   TaskStatus.cpp
   ThreadingError.cpp
-  TracingSignpost.cpp
   "${PROJECT_SOURCE_DIR}/CompatibilityOverride/CompatibilityOverride.cpp"
   "./linker-support/magic-symbols-for-install-name.c"
   Actor.swift
@@ -99,6 +98,15 @@ add_library(swift_Concurrency
   "${CMAKE_CURRENT_BINARY_DIR}/TaskGroup+addTask.swift"
   "${CMAKE_CURRENT_BINARY_DIR}/Task+immediate.swift")
 
+if(SwiftCore_ENABLE_STDLIB_TRACING)
+  target_compile_definitions(swift_Concurrency
+    PRIVATE
+      SWIFT_STDLIB_TRACING
+      SWIFT_STDLIB_CONCURRENCY_TRACING)
+  target_sources(swift_Concurrency
+    PRIVATE TracingSignpost.cpp)
+endif()
+
 if(APPLE)
   target_sources(swift_Concurrency PRIVATE
     CFExecutor.swift

Runtimes/Core/cmake/caches/Vendors/Apple/apple-common.cmake

@@ -13,6 +13,7 @@ set(SwiftCore_ENABLE_RUNTIME_FUNCTION_COUNTERS ON CACHE BOOL "")
 set(SwiftCore_ENABLE_BACKDEPLOYMENT_SUPPORT ON CACHE BOOL "")
 set(SwiftCore_ENABLE_FILESYSTEM_SUPPORT ON CACHE BOOL "")
 set(SwiftCore_ENABLE_STRICT_AVAILABILITY ON CACHE BOOL "")
+set(SwiftCore_ENABLE_STDLIB_TRACING ON CACHE BOOL "")
 
 set(SwiftCore_OPTIMIZATION_REMARKS "bitstream" CACHE STRING "")