[CMake] Add missing SDK overlay dependencies. (#3799)

...plus the hacked-up tool I used to find them.

Author: jrose-apple

stdlib/public/SDK/AVFoundation/CMakeLists.txt

@@ -2,4 +2,5 @@ add_swift_library(swiftAVFoundation ${SWIFT_SDK_OVERLAY_LIBRARY_BUILD_TYPES} IS_
   AVFoundation.swift
   TARGET_SDKS OSX IOS IOS_SIMULATOR TVOS TVOS_SIMULATOR
   SWIFT_MODULE_DEPENDS Foundation CoreMedia
+  SWIFT_MODULE_DEPENDS_OSX AppKit
   FRAMEWORK_DEPENDS AVFoundation)

stdlib/public/SDK/Intents/CMakeLists.txt

@@ -17,7 +17,7 @@ add_swift_library(swiftIntents ${SWIFT_SDK_OVERLAY_LIBRARY_BUILD_TYPES} IS_SDK_O
   INTemperature.swift
 
   TARGET_SDKS OSX IOS IOS_SIMULATOR
-  SWIFT_MODULE_DEPENDS Foundation
+  SWIFT_MODULE_DEPENDS Foundation CoreLocation
   SWIFT_MODULE_DEPENDS_OSX AppKit
   SWIFT_MODULE_DEPENDS_IOS UIKit
   FRAMEWORK_DEPENDS_WEAK Intents)

stdlib/public/SDK/Photos/CMakeLists.txt

@@ -3,7 +3,7 @@ add_swift_library(swiftPhotos ${SWIFT_SDK_OVERLAY_LIBRARY_BUILD_TYPES} IS_SDK_OV
 
   TARGET_SDKS IOS IOS_SIMULATOR TVOS TVOS_SIMULATOR
   SWIFT_MODULE_DEPENDS Foundation CoreLocation CoreImage CoreMedia
-  SWIFT_MODULE_DEPENDS_IOS UIKit
-  SWIFT_MODULE_DEPENDS_TVOS UIKit
+  SWIFT_MODULE_DEPENDS_IOS UIKit AVFoundation
+  SWIFT_MODULE_DEPENDS_TVOS UIKit AVFoundation
   FRAMEWORK_DEPENDS Photos)
 

stdlib/public/SDK/WatchKit/CMakeLists.txt

@@ -1,7 +1,8 @@
 add_swift_library(swiftWatchKit ${SWIFT_SDK_OVERLAY_LIBRARY_BUILD_TYPES} IS_SDK_OVERLAY
   WatchKit.swift
   TARGET_SDKS IOS IOS_SIMULATOR WATCHOS WATCHOS_SIMULATOR
-  SWIFT_MODULE_DEPENDS Foundation UIKit CoreGraphics SceneKit
+  SWIFT_MODULE_DEPENDS Foundation UIKit CoreGraphics
+  SWIFT_MODULE_DEPENDS_WATCHOS HomeKit SceneKit
   FRAMEWORK_DEPENDS_WEAK WatchKit
   SWIFT_COMPILE_FLAGS_WATCHOS -Xfrontend -disable-autolink-framework -Xfrontend CoreText
 )

utils/find-overlay-dependencies.sh

@@ -0,0 +1,52 @@
+#!/usr/bin/env zsh
+#===--- find-overlay-dependencies.sh - ...by looking at imported headers ---===#
+#
+## This source file is part of the Swift.org open source project
+##
+## Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
+## Licensed under Apache License v2.0 with Runtime Library Exception
+##
+## See http://swift.org/LICENSE.txt for license information
+## See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+#
+#===------------------------------------------------------------------------===#
+
+# This script uses zsh for its associative array support, because it is only
+# intended to be run on macOS and macOS bash is very old.
+
+if [[ $# -ne 1 ]]; then
+  echo 'usage:' $0 '<module-name>' >&2
+  exit 1
+fi
+
+OVERLAYS_PATH=$(dirname "$0")/../stdlib/public/SDK/
+
+typeset -A CUSTOM_NAMED_MODULES
+CUSTOM_NAMED_MODULES[ObjectiveC]=objc
+CUSTOM_NAMED_MODULES[Dispatch]=dispatch
+CUSTOM_NAMED_MODULES[XPC]=xpc
+
+ALL_OVERLAYS=()
+for overlay in $(ls "$OVERLAYS_PATH"); do
+  ALL_OVERLAYS+=${CUSTOM_NAMED_MODULES[$overlay]-$overlay}
+done
+
+typeset -A SDKS
+SDKS[macosx]=x86_64
+SDKS[iphoneos]=arm64
+SDKS[appletvos]=arm64
+SDKS[watchos]=armv7k
+
+for sdk in ${(k)SDKS}; do
+  arch=$SDKS[$sdk]
+  printf "%s:\n\t" "$sdk"
+  deps=$(echo "@import $1;" | xcrun -sdk $sdk clang -arch $arch -x objective-c - -M -fmodules 2>/dev/null)
+  for overlay in $ALL_OVERLAYS; do
+    (echo "$deps" |
+        egrep -v 'module.(module)?map' |
+        egrep -v "\b${CUSTOM_NAMED_MODULES[$1]-$1}\b" |
+        egrep -q "\b$overlay\b") &&
+      printf "%s " $overlay
+  done
+  echo # newline
+done