Runtimes: introduce SwiftOnoneSupport

The main goal for now is to have this building for macOS, with little
concern about matching the build flags used currently.

Addresses rdar://143151393

Author: edymtt

Runtimes/Core/CMakeLists.txt

@@ -177,3 +177,4 @@ add_subdirectory(runtime)
 add_subdirectory(stubs)
 add_subdirectory(CommandLineSupport)
 add_subdirectory(core)
+add_subdirectory(SwiftOnoneSupport)

Runtimes/Core/SwiftOnoneSupport/CMakeLists.txt

@@ -0,0 +1,42 @@
+add_library(swiftSwiftOnoneSupport
+  SwiftOnoneSupport.swift
+  "${PROJECT_SOURCE_DIR}/linker-support/magic-symbols-for-install-name.c")
+
+set_target_properties(swiftSwiftOnoneSupport PROPERTIES 
+ Swift_MODULE_NAME SwiftOnoneSupport)
+
+if(APPLE AND BUILD_SHARED_LIBS)
+  target_link_options(swiftSwiftOnoneSupport PRIVATE "SHELL:-Xlinker -headerpad_max_install_names")
+endif()
+
+target_compile_options(swiftSwiftOnoneSupport PRIVATE
+  $<$<COMPILE_LANGUAGE:Swift>:-parse-stdlib>
+  "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xllvm -sil-inline-generics=false>"
+
+  # We have to disable validation of TBD files, because this module is
+  # _explicitly_ special-cased to result in extra symbols generated by the
+  # optimizer, meaning TBDGen can't (and shouldn't: it has to run
+  # pre-optimization for performance) list them.
+  # See also caa3dd4d291ec93c1a59f1db62604e703bff8468
+  "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xfrontend -validate-tbd-against-ir=none>"
+
+  "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xfrontend -check-onone-completeness>"
+  "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xfrontend -disable-access-control>")
+
+target_compile_definitions(swiftSwiftOnoneSupport PRIVATE
+  $<$<COMPILE_LANGUAGE:C,CXX>:-DSWIFT_TARGET_LIBRARY_NAME=swiftSwiftOnoneSupport>)
+
+target_link_libraries(swiftSwiftOnoneSupport
+  PRIVATE
+    swiftShims
+    swiftCore)
+
+install(TARGETS swiftSwiftOnoneSupport)
+install(FILES "${CMAKE_CURRENT_BINARY_DIR}/SwiftOnoneSupport.swiftmodule"
+  DESTINATION "${CMAKE_INSTALL_LIBDIR}/swift/SwiftOnoneSupport.swiftmodule"
+  RENAME "${SwiftCore_MODULE_TRIPLE}.swiftmodule")
+emit_swift_interface(swiftSwiftOnoneSupport)
+install_swift_interface(swiftSwiftOnoneSupport)
+
+# Configure plist creation for Darwin platforms.
+generate_plist("${CMAKE_PROJECT_NAME}" "${CMAKE_PROJECT_VERSION}" swiftSwiftOnoneSupport)

Runtimes/Resync.cmake

@@ -78,15 +78,11 @@ set(CoreLibs
   CompatibilityOverride
   stubs
   CommandLineSupport
-  core)
+  core
+  SwiftOnoneSUpport)
 
   # Add these as we get them building
-  # core
-  # Concurrency
-  # SwiftOnoneSUpport
-  # CommandLineSupport
   # Demangling
-  # runtime)
 
 foreach(library ${CoreLibs})
   copy_library_sources(${library} "public" "Core")