Add SwiftShims as an interface library

Runtimes/Core/CMakeLists.txt

@@ -12,3 +12,4 @@ include(CompilerSettings)
 include_directories(include)
 
 add_subdirectory(LLVMSupport)
+add_subdirectory(SwiftShims/swift/shims)

Runtimes/Core/SwiftShims/swift/shims/CMakeLists.txt

@@ -0,0 +1,37 @@
+# Swift shim header files
+install(FILES
+  AssertionReporting.h
+  CoreFoundationShims.h
+  EmbeddedShims.h
+  FoundationShims.h
+  GlobalObjects.h
+  HeapObject.h
+  KeyPath.h
+  LibcOverlayShims.h
+  LibcShims.h
+  MetadataSections.h
+  Random.h
+  RefCount.h
+  Reflection.h
+  RuntimeShims.h
+  RuntimeStubs.h
+  SwiftStdbool.h
+  SwiftStddef.h
+  SwiftStdint.h
+  System.h
+  Target.h
+  ThreadLocalStorage.h
+  UnicodeData.h
+  Visibility.h
+  _SwiftConcurrency.h
+  _SwiftDistributed.h
+  _SynchronizationShims.h
+  module.modulemap
+  DESTINATION "${CMAKE_INSTALL_LIBDIR}/swift/shims")
+
+add_library(swiftShims INTERFACE)
+target_include_directories(swiftShims INTERFACE
+  $<$<COMPILE_LANGUAGE:C,CXX>:${CMAKE_CURRENT_SOURCE_DIR}/../../>
+  $<$<COMPILE_LANGUAGE:Swift>:${CMAKE_CURRENT_SOURCE_DIR}>)
+target_compile_options(swiftShims INTERFACE
+  $<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xcc$<SEMICOLON>-fmodule-map-file=${CMAKE_CURRENT_SOURCE_DIR}/module.modulemap>)

Runtimes/Resync.cmake

@@ -52,7 +52,8 @@ endfunction()
 copy_library_sources(include "" "Core")
 
 set(CoreLibs
-  LLVMSupport)
+  LLVMSupport
+  SwiftShims)
 
   # Add these as we get them building
   # core