[embedded] use dedicated CMakeLists.txt to build unicode data tables

This will avoid CMake configuration errors in `llvm_process_sources`
 in configurations that build only the the standard library for embedded.

Addresses rdar://130229502

Author: edymtt

stdlib/public/stubs/CMakeLists.txt

@@ -50,62 +50,4 @@ if("${SWIFT_PRIMARY_VARIANT_SDK}" IN_LIST SWIFT_DARWIN_PLATFORMS)
                  "-fobjc-arc")
 endif()
 
-# Embedded Swift Unicode library
-if(SWIFT_SHOULD_BUILD_EMBEDDED_STDLIB)
-  add_custom_target(embedded-unicode ALL)
-
-  foreach(entry ${EMBEDDED_STDLIB_TARGET_TRIPLES})
-    string(REGEX REPLACE "[ \t]+" ";" list "${entry}")
-    list(GET list 0 arch)
-    list(GET list 1 mod)
-    list(GET list 2 triple)
-
-    if("${mod}" MATCHES "-windows-msvc$")
-      continue()
-    endif()
-
-    if (SWIFT_HOST_VARIANT STREQUAL "linux")
-      set(extra_c_compile_flags -ffreestanding)
-    elseif (SWIFT_HOST_VARIANT STREQUAL "macosx")
-      set(extra_c_compile_flags -D__MACH__ -D__APPLE__ -ffreestanding)
-    endif()
-    
-    set(SWIFT_SDK_embedded_ARCH_${mod}_MODULE "${mod}")
-    set(SWIFT_SDK_embedded_LIB_SUBDIR "embedded")
-    set(SWIFT_SDK_embedded_ARCH_${mod}_TRIPLE "${triple}")
-
-    add_swift_target_library_single(
-      embedded-unicode-${mod}
-      swiftUnicodeDataTables
-      STATIC
-      IS_FRAGILE
-
-      Unicode/UnicodeData.cpp
-      Unicode/UnicodeGrapheme.cpp
-      Unicode/UnicodeNormalization.cpp
-      Unicode/UnicodeScalarProps.cpp
-      Unicode/UnicodeWord.cpp
-
-      C_COMPILE_FLAGS ${extra_c_compile_flags}
-      MODULE_DIR "${CMAKE_BINARY_DIR}/lib/swift/embedded"
-      SDK "embedded"
-      ARCHITECTURE "${mod}"
-      DEPENDS embedded-stdlib-${mod}
-      INSTALL_IN_COMPONENT stdlib
-      )
-    swift_install_in_component(
-      TARGETS embedded-unicode-${mod}
-      DESTINATION "lib/swift/embedded/${mod}"
-      COMPONENT "stdlib"
-      )
-    swift_install_in_component(
-      FILES "${SWIFTLIB_DIR}/embedded/${mod}/libswiftUnicodeDataTables.a"
-      DESTINATION "lib/swift/embedded/${mod}/"
-      COMPONENT "stdlib"
-      PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE
-      )
-    set_property(TARGET embedded-unicode-${mod} PROPERTY OSX_ARCHITECTURES "${arch}")
-
-    add_dependencies(embedded-unicode embedded-unicode-${mod})
-  endforeach()
-endif()
+add_subdirectory(Unicode)

stdlib/public/stubs/Unicode/CMakeLists.txt

@@ -0,0 +1,60 @@
+
+# Embedded Swift Unicode library
+if(SWIFT_SHOULD_BUILD_EMBEDDED_STDLIB)
+  add_custom_target(embedded-unicode ALL)
+
+  foreach(entry ${EMBEDDED_STDLIB_TARGET_TRIPLES})
+    string(REGEX REPLACE "[ \t]+" ";" list "${entry}")
+    list(GET list 0 arch)
+    list(GET list 1 mod)
+    list(GET list 2 triple)
+
+    if("${mod}" MATCHES "-windows-msvc$")
+      continue()
+    endif()
+
+    if (SWIFT_HOST_VARIANT STREQUAL "linux")
+      set(extra_c_compile_flags -ffreestanding)
+    elseif (SWIFT_HOST_VARIANT STREQUAL "macosx")
+      set(extra_c_compile_flags -D__MACH__ -D__APPLE__ -ffreestanding)
+    endif()
+    
+    set(SWIFT_SDK_embedded_ARCH_${mod}_MODULE "${mod}")
+    set(SWIFT_SDK_embedded_LIB_SUBDIR "embedded")
+    set(SWIFT_SDK_embedded_ARCH_${mod}_TRIPLE "${triple}")
+
+    add_swift_target_library_single(
+      embedded-unicode-${mod}
+      swiftUnicodeDataTables
+      STATIC
+      IS_FRAGILE
+
+      UnicodeData.cpp
+      UnicodeGrapheme.cpp
+      UnicodeNormalization.cpp
+      UnicodeScalarProps.cpp
+      UnicodeWord.cpp
+
+      C_COMPILE_FLAGS ${extra_c_compile_flags}
+      MODULE_DIR "${CMAKE_BINARY_DIR}/lib/swift/embedded"
+      SDK "embedded"
+      ARCHITECTURE "${mod}"
+      DEPENDS embedded-stdlib-${mod}
+      INSTALL_IN_COMPONENT stdlib
+      )
+    swift_install_in_component(
+      TARGETS embedded-unicode-${mod}
+      DESTINATION "lib/swift/embedded/${mod}"
+      COMPONENT "stdlib"
+      )
+    swift_install_in_component(
+      FILES "${SWIFTLIB_DIR}/embedded/${mod}/libswiftUnicodeDataTables.a"
+      DESTINATION "lib/swift/embedded/${mod}/"
+      COMPONENT "stdlib"
+      PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE
+      )
+    set_property(TARGET embedded-unicode-${mod} PROPERTY OSX_ARCHITECTURES "${arch}")
+
+    add_dependencies(embedded-unicode embedded-unicode-${mod})
+  endforeach()
+endif()