Merge pull request swiftlang#83262 from edymtt/edymtt/catalyst-and-backdeployment-for-overlay

Overlay: support Catalyst, hooks and backdeployment on Apple platforms

Author: edymtt

Runtimes/Core/cmake/interface/SwiftCoreConfig.cmake.in

@@ -4,3 +4,5 @@ include("${CMAKE_CURRENT_LIST_DIR}/SwiftCoreTargets.cmake")
 set(SwiftCore_ENABLE_LIBRARY_EVOLUTION @SwiftCore_ENABLE_LIBRARY_EVOLUTION@)
 
 set(SwiftCore_ENABLE_VECTOR_TYPES @SwiftCore_ENABLE_VECTOR_TYPES@)
+
+set(SwiftCore_ENABLE_BACKDEPLOYMENT_SUPPORT @SwiftCore_ENABLE_BACKDEPLOYMENT_SUPPORT@)

Runtimes/Overlay/CMakeLists.txt

@@ -41,6 +41,9 @@ set(SwiftOverlay_SWIFTC_SOURCE_DIR
   "${PROJECT_SOURCE_DIR}/../../"
   CACHE FILEPATH "Path to the root source directory of the Swift compiler")
 
+set(${PROJECT_NAME}_VENDOR_MODULE_DIR "${CMAKE_SOURCE_DIR}/cmake/modules/vendor"
+  CACHE FILEPATH "Location for private build system extension")
+
 include(GNUInstallDirs)
 
 include(gyb)
@@ -51,6 +54,8 @@ include(InstallSwiftInterface)
 include(PlatformInfo)
 include(ResourceEmbedding)
 
+include("${${PROJECT_NAME}_VENDOR_MODULE_DIR}/Settings.cmake" OPTIONAL)
+
 defaulted_option(SwiftOverlay_ENABLE_REFLECTION "Enable runtime support for mirrors and reflection support")
 
 option(SwiftOverlay_INSTALL_NESTED_SUBDIR "Install libraries under a platform and architecture subdirectory" ON)
@@ -59,6 +64,8 @@ set(SwiftOverlay_INSTALL_SWIFTMODULEDIR "${CMAKE_INSTALL_LIBDIR}/swift$<$<NOT:$<
 
 option(SwiftOverlay_ENABLE_LIBRARY_EVOLUTION "Generate ABI resilient runtime libraries"
   ${SwiftCore_ENABLE_LIBRARY_EVOLUTION})
+option(SwiftOverlay_ENABLE_BACKDEPLOYMENT_SUPPORT "Add symbols for runtime backdeployment"
+  ${SwiftCore_ENABLE_BACKDEPLOYMENT_SUPPORT})
 
 add_compile_options(
   $<$<COMPILE_LANGUAGE:Swift>:-explicit-module-build>
@@ -71,6 +78,9 @@ add_compile_options(
   "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xfrontend -disable-implicit-concurrency-module-import>"
   "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xfrontend -disable-implicit-string-processing-module-import>")
 
+add_compile_definitions(
+  $<$<BOOL:${SwiftOverlay_ENABLE_BACKDEPLOYMENT_SUPPORT}>:SWIFT_STDLIB_SUPPORT_BACK_DEPLOYMENT>)
+
 include(ExperimentalFeatures)
 
 add_subdirectory(clang)
@@ -99,3 +109,5 @@ install(FILES
   "${CMAKE_CURRENT_BINARY_DIR}/cmake/SwiftOverlay/SwiftOverlayConfig.cmake"
   "${CMAKE_CURRENT_BINARY_DIR}/cmake/SwiftOverlay/SwiftOverlayConfigVersion.cmake"
   DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/SwiftOverlay")
+
+include("${${PROJECT_NAME}_VENDOR_MODULE_DIR}/swiftOverlay.cmake" OPTIONAL)

Runtimes/Overlay/clang/CMakeLists.txt

@@ -1,3 +1,4 @@
+include(CatalystSupport)
 
 gyb_expand(float.swift.gyb float.swift)
 

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

@@ -1,6 +1,8 @@
 set(CMAKE_BUILD_TYPE RelWithDebInfo CACHE STRING "")
 set(BUILD_SHARED_LIBS YES CACHE BOOL "")
 set(SwiftOverlay_INSTALL_NESTED_SUBDIR OFF CACHE BOOL "")
+set(SwiftOverlay_ENABLE_LIBRARY_EVOLUTION ON CACHE BOOL "")
+set(SwiftOverlay_ENABLE_BACKDEPLOYMENT_SUPPORT ON CACHE BOOL "")
 
 set(CMAKE_CXX_FLAGS_MINSIZEREL "-Os -g -DNDEBUG" CACHE STRING "")
 set(CMAKE_C_FLAGS_MINSIZEREL "-Os -g -DNDEBUG" CACHE STRING "")

Runtimes/Overlay/cmake/modules/CatalystSupport.cmake

@@ -0,0 +1,40 @@
+include(CheckCompilerFlag)
+
+# Add flags for generating the zippered target variant in the build
+
+# Initialize `${PROJECT_NAME}_VARIANT_MODULE_TRIPLE` if the driver is able to emit
+# modules for the target variant.
+
+if(${PROJECT_NAME}_COMPILER_VARIANT_TARGET)
+  add_compile_options(
+    "$<$<COMPILE_LANGUAGE:C,CXX>:SHELL:-darwin-target-variant ${${PROJECT_NAME}_COMPILER_VARIANT_TARGET}>"
+    "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-target-variant ${${PROJECT_NAME}_COMPILER_VARIANT_TARGET}>"
+
+    # TODO: Remove me once we have a driver with
+    #   https://github.com/swiftlang/swift-driver/pull/1803
+    "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xclang-linker -darwin-target-variant -Xclang-linker ${${PROJECT_NAME}_COMPILER_VARIANT_TARGET}>")
+
+  add_link_options(
+    "$<$<LINK_LANGUAGE:C,CXX>:SHELL:-darwin-target-variant ${${PROJECT_NAME}_COMPILER_VARIANT_TARGET}>"
+    "$<$<LINK_LANGUAGE:Swift>:SHELL:-target-variant ${${PROJECT_NAME}_COMPILER_VARIANT_TARGET}>"
+
+    # TODO: Remove me once we have a driver with
+    #   https://github.com/swiftlang/swift-driver/pull/1803
+    "$<$<LINK_LANGUAGE:Swift>:SHELL:-Xclang-linker -darwin-target-variant -Xclang-linker ${${PROJECT_NAME}_COMPILER_VARIANT_TARGET}>")
+
+  # TODO: Once we are guaranteed to have a driver with the variant module path
+  #       support everywhere, we should integrate this into PlatformInfo.cmake
+  check_compiler_flag(Swift "-emit-variant-module-path ${CMAKE_CURRENT_BINARY_DIR}/CompilerID/variant.swiftmodule" HAVE_Swift_VARIANT_MODULE_PATH_FLAG)
+  if(HAVE_Swift_VARIANT_MODULE_PATH_FLAG)
+    # Get variant module triple
+    set(module_triple_command "${CMAKE_Swift_COMPILER}" -print-target-info -target ${${PROJECT_NAME}_COMPILER_VARIANT_TARGET})
+    execute_process(COMMAND ${module_triple_command} OUTPUT_VARIABLE target_info_json)
+    message(CONFIGURE_LOG "Swift target variant info: ${target_info_json}")
+
+
+    string(JSON module_triple GET "${target_info_json}" "target" "moduleTriple")
+    set(${PROJECT_NAME}_VARIANT_MODULE_TRIPLE "${module_triple}" CACHE STRING "Triple used for installed swift{module,interface} files for the target variant")
+    mark_as_advanced(${PROJECT_NAME}_VARIANT_MODULE_TRIPLE)
+    message(CONFIGURE_LOG "Swift target variant module triple: ${module_triple}")
+  endif()
+endif()

Runtimes/Resync.cmake

@@ -105,7 +105,7 @@ copy_files("" "Supplemental/Distributed" FILES "Info.plist.in")
 # Platform Overlays
 
 # Copy magic linker symbols
-copy_library_sources("linker-support" "" "Overlay")
+copy_library_sources("linker-support" "public/ClangOverlays" "Overlay")
 
 message(STATUS "Clang[${StdlibSources}/public/ClangOverlays] -> ${CMAKE_CURRENT_LIST_DIR}/Overlay/clang")
 copy_files(public/ClangOverlays Overlay/clang FILES float.swift.gyb)