diff --git a/cmake/modules/AddSwift.cmake b/cmake/modules/AddSwift.cmake
index 501049a771536..74418213f4fd4 100644
--- a/cmake/modules/AddSwift.cmake
+++ b/cmake/modules/AddSwift.cmake
@@ -601,6 +601,7 @@ endfunction()
 #     [DEPENDS dep1 ...]
 #     [LINK_LIBRARIES dep1 ...]
 #     [FRAMEWORK_DEPENDS dep1 ...]
+#     [FRAMEWORK_DEPENDS_WEAK dep1 ...]
 #     [COMPONENT_DEPENDS comp1 ...]
 #     [C_COMPILE_FLAGS flag1...]
 #     [SWIFT_COMPILE_FLAGS flag1...]
@@ -638,6 +639,9 @@ endfunction()
 # FRAMEWORK_DEPENDS
 #   System frameworks this library depends on.
 #
+# FRAMEWORK_DEPENDS_WEAK
+#   System frameworks this library depends on that should be weakly-linked.
+#
 # COMPONENT_DEPENDS
 #   LLVM components this library depends on.
 #
@@ -678,7 +682,7 @@ function(_add_swift_library_single target name)
       SHARED IS_STDLIB IS_STDLIB_CORE IS_SDK_OVERLAY
       API_NOTES_NON_OVERLAY DONT_EMBED_BITCODE)
   parse_arguments(SWIFTLIB_SINGLE
-    "DEPENDS;LINK_LIBRARIES;FRAMEWORK_DEPENDS;COMPONENT_DEPENDS;C_COMPILE_FLAGS;SWIFT_COMPILE_FLAGS;LINK_FLAGS;PRIVATE_LINK_LIBRARIES;INTERFACE_LINK_LIBRARIES;FILE_DEPENDS;SDK;ARCHITECTURE;INSTALL_IN_COMPONENT"
+    "DEPENDS;LINK_LIBRARIES;FRAMEWORK_DEPENDS;FRAMEWORK_DEPENDS_WEAK;COMPONENT_DEPENDS;C_COMPILE_FLAGS;SWIFT_COMPILE_FLAGS;LINK_FLAGS;PRIVATE_LINK_LIBRARIES;INTERFACE_LINK_LIBRARIES;FILE_DEPENDS;SDK;ARCHITECTURE;INSTALL_IN_COMPONENT"
     "${SWIFTLIB_SINGLE_options}"
     ${ARGN})
 
@@ -944,6 +948,11 @@ function(_add_swift_library_single target name)
       target_link_libraries("${t}" PUBLIC "-framework ${FRAMEWORK}")
     endforeach()
   endforeach()
+  foreach(FRAMEWORK ${SWIFTLIB_SINGLE_FRAMEWORK_DEPENDS_WEAK})
+    foreach(t "${target}" ${target_static})
+      target_link_libraries("${t}" PUBLIC "-weak_framework ${FRAMEWORK}")
+    endforeach()
+  endforeach()
 
   swift_common_llvm_config("${target}" ${SWIFTLIB_SINGLE_COMPONENT_DEPENDS})
 
@@ -1055,6 +1064,7 @@ endfunction()
 #     [INTERFACE_LINK_LIBRARIES dep1 ...]
 #     [SWIFT_MODULE_DEPENDS dep1 ...]
 #     [FRAMEWORK_DEPENDS dep1 ...]
+#     [FRAMEWORK_DEPENDS_WEAK dep1 ...]
 #     [COMPONENT_DEPENDS comp1 ...]
 #     [FILE_DEPENDS target1 ...]
 #     [TARGET_SDKS sdk1...]
@@ -1097,6 +1107,9 @@ endfunction()
 # FRAMEWORK_DEPENDS
 #   System frameworks this library depends on.
 #
+# FRAMEWORK_DEPENDS_WEAK
+#   System frameworks this library depends on that should be weak-linked
+#
 # COMPONENT_DEPENDS
 #   LLVM components this library depends on.
 #
@@ -1146,7 +1159,7 @@ function(add_swift_library name)
       SHARED IS_STDLIB IS_STDLIB_CORE IS_SDK_OVERLAY TARGET_LIBRARY
       API_NOTES_NON_OVERLAY DONT_EMBED_BITCODE)
   parse_arguments(SWIFTLIB
-    "DEPENDS;LINK_LIBRARIES;SWIFT_MODULE_DEPENDS;SWIFT_MODULE_DEPENDS_OSX;SWIFT_MODULE_DEPENDS_IOS_TVOS;SWIFT_MODULE_DEPENDS_WATCHOS;FRAMEWORK_DEPENDS;FRAMEWORK_DEPENDS_OSX;FRAMEWORK_DEPENDS_IOS_TVOS;COMPONENT_DEPENDS;FILE_DEPENDS;TARGET_SDKS;C_COMPILE_FLAGS;SWIFT_COMPILE_FLAGS;LINK_FLAGS;PRIVATE_LINK_LIBRARIES;INTERFACE_LINK_LIBRARIES;INSTALL_IN_COMPONENT"
+    "DEPENDS;LINK_LIBRARIES;SWIFT_MODULE_DEPENDS;SWIFT_MODULE_DEPENDS_OSX;SWIFT_MODULE_DEPENDS_IOS_TVOS;SWIFT_MODULE_DEPENDS_WATCHOS;FRAMEWORK_DEPENDS;FRAMEWORK_DEPENDS_WEAK;FRAMEWORK_DEPENDS_OSX;FRAMEWORK_DEPENDS_IOS_TVOS;COMPONENT_DEPENDS;FILE_DEPENDS;TARGET_SDKS;C_COMPILE_FLAGS;SWIFT_COMPILE_FLAGS;LINK_FLAGS;PRIVATE_LINK_LIBRARIES;INTERFACE_LINK_LIBRARIES;INSTALL_IN_COMPONENT"
       "${SWIFTLIB_options}"
       ${ARGN})
   set(SWIFTLIB_SOURCES ${SWIFTLIB_DEFAULT_ARGS})
@@ -1267,6 +1280,7 @@ function(add_swift_library name)
           DEPENDS ${SWIFTLIB_DEPENDS}
           LINK_LIBRARIES ${swiftlib_link_libraries}
           FRAMEWORK_DEPENDS ${swiftlib_framework_depends_flattened}
+          FRAMEWORK_DEPENDS_WEAK ${SWIFTLIB_FRAMEWORK_DEPENDS_WEAK}
           COMPONENT_DEPENDS ${SWIFTLIB_COMPONENT_DEPENDS}
           FILE_DEPENDS ${SWIFTLIB_FILE_DEPENDS} ${swiftlib_module_dependency_targets}
           C_COMPILE_FLAGS ${SWIFTLIB_C_COMPILE_FLAGS}
@@ -1412,6 +1426,7 @@ function(add_swift_library name)
       DEPENDS ${SWIFTLIB_DEPENDS}
       LINK_LIBRARIES ${SWIFTLIB_LINK_LIBRARIES}
       FRAMEWORK_DEPENDS ${SWIFTLIB_FRAMEWORK_DEPENDS}
+      FRAMEWORK_DEPENDS_WEAK ${SWIFTLIB_FRAMEWORK_DEPENDS_WEAK}
       COMPONENT_DEPENDS ${SWIFTLIB_COMPONENT_DEPENDS}
       FILE_DEPENDS ${SWIFTLIB_FILE_DEPENDS}
       C_COMPILE_FLAGS ${SWIFTLIB_C_COMPILE_FLAGS}
diff --git a/stdlib/public/SDK/Contacts/CMakeLists.txt b/stdlib/public/SDK/Contacts/CMakeLists.txt
index ffacb80b878ec..918b0fc467b01 100644
--- a/stdlib/public/SDK/Contacts/CMakeLists.txt
+++ b/stdlib/public/SDK/Contacts/CMakeLists.txt
@@ -1,4 +1,5 @@
 add_swift_library(swiftContacts IS_SDK_OVERLAY
   Contacts.swift
   TARGET_SDKS OSX IOS IOS_SIMULATOR
-  SWIFT_MODULE_DEPENDS Foundation)
+  SWIFT_MODULE_DEPENDS Foundation
+  FRAMEWORK_DEPENDS_WEAK Contacts)