[static-stdlib] NFC: Generalize the static-executable-args.lnk file generation

This patch makes the build system to copy the lnk files for each
stdlib targets if needed instead of only for the Linux target.

This is the take 2 of the patch. The first one was reverted in
7aa4a8d

Author: kateinoigakukun

stdlib/public/runtime/CMakeLists.txt

@@ -102,30 +102,38 @@ set(swift_runtime_library_compile_flags ${swift_runtime_compile_flags})
 list(APPEND swift_runtime_library_compile_flags -DswiftCore_EXPORTS)
 list(APPEND swift_runtime_library_compile_flags -I${SWIFT_SOURCE_DIR}/stdlib/include/llvm/Support -I${SWIFT_SOURCE_DIR}/include)
 
-set(sdk "${SWIFT_HOST_VARIANT_SDK}")
-if(SWIFT_BUILD_STATIC_STDLIB AND "${sdk}" STREQUAL "LINUX")
+if(SWIFT_BUILD_STATIC_STDLIB)
   set(static_binary_lnk_file_list)
-  string(TOLOWER "${sdk}" lowercase_sdk)
-  set(static_binary_lnk_src "${SWIFT_SOURCE_DIR}/stdlib/public/Resources/${lowercase_sdk}/static-executable-args.lnk")
 
-  # Generate the static-executable-args.lnk file used for ELF systems (eg linux)
-  set(linkfile "${lowercase_sdk}/static-executable-args.lnk")
-  add_custom_command_target(swift_static_binary_${sdk}_args
-    COMMAND
-      "${CMAKE_COMMAND}" -E copy
-      "${static_binary_lnk_src}"
-      "${SWIFTSTATICLIB_DIR}/${linkfile}"
-    OUTPUT
-      "${SWIFTSTATICLIB_DIR}/${linkfile}"
-    DEPENDS
-      "${static_binary_lnk_src}")
+  foreach(sdk ${SWIFT_SDKS})
+    if(NOT "${sdk}" STREQUAL "LINUX")
+      continue()
+    endif()
+
+    string(TOLOWER "${sdk}" lowercase_sdk)
+    set(static_binary_lnk_src "${SWIFT_SOURCE_DIR}/stdlib/public/Resources/${lowercase_sdk}/static-executable-args.lnk")
+
+    # Generate the static-executable-args.lnk file used for ELF systems (eg linux)
+    set(linkfile "${lowercase_sdk}/static-executable-args.lnk")
+    add_custom_command_target(swift_static_binary_${sdk}_args
+      COMMAND
+        "${CMAKE_COMMAND}" -E copy
+        "${static_binary_lnk_src}"
+        "${SWIFTSTATICLIB_DIR}/${linkfile}"
+      OUTPUT
+        "${SWIFTSTATICLIB_DIR}/${linkfile}"
+      DEPENDS
+        "${static_binary_lnk_src}")
 
-  list(APPEND static_binary_lnk_file_list ${swift_static_binary_${sdk}_args})
-  swift_install_in_component(FILES "${SWIFTSTATICLIB_DIR}/${linkfile}"
-                             DESTINATION "lib/swift_static/${lowercase_sdk}"
-                             COMPONENT stdlib)
-  add_dependencies(stdlib ${static_binary_lnk_file_list})
-  add_custom_target(static_binary_magic ALL DEPENDS ${static_binary_lnk_file_list})
+    list(APPEND static_binary_lnk_file_list ${swift_static_binary_${sdk}_args})
+    swift_install_in_component(FILES "${SWIFTSTATICLIB_DIR}/${linkfile}"
+                               DESTINATION "lib/swift_static/${lowercase_sdk}"
+                               COMPONENT stdlib)
+  endforeach()
+  if(static_binary_lnk_file_list)
+    add_dependencies(stdlib ${static_binary_lnk_file_list})
+    add_custom_target(static_binary_magic ALL DEPENDS ${static_binary_lnk_file_list})
+  endif()
 endif()
 
 add_swift_target_library(swiftRuntime OBJECT_LIBRARY