cmake: Add NO_SWIFTMODULE option to add_swift_target_library()

stdlib/cmake/modules/AddSwiftStdlib.cmake

@@ -721,6 +721,8 @@ endfunction()
 #     [DONT_EMBED_BITCODE]
 #     [IS_STDLIB]
 #     [IS_STDLIB_CORE]
+#     [ONLY_SWIFTMODULE]
+#     [NO_SWIFTMODULE]
 #     [IS_SDK_OVERLAY]
 #     [IS_FRAGILE]
 #     INSTALL_IN_COMPONENT comp
@@ -742,9 +744,6 @@ endfunction()
 # STATIC
 #   Build a static library.
 #
-# ONLY_SWIFTMODULE
-#   Do not build either static or shared, build just the .swiftmodule.
-#
 # SDK sdk
 #   SDK to build for.
 #
@@ -784,6 +783,12 @@ endfunction()
 # IS_STDLIB_CORE
 #   Compile as the standard library core.
 #
+# ONLY_SWIFTMODULE
+#   Do not build either static or shared, build just the .swiftmodule.
+#
+# NO_SWIFTMODULE
+#   Only build either static or shared, and skip the .swiftmodule.
+#
 # IS_SDK_OVERLAY
 #   Treat the library as a part of the Swift SDK overlay.
 #
@@ -811,6 +816,7 @@ function(add_swift_target_library_single target name)
         SHARED
         STATIC
         ONLY_SWIFTMODULE
+        NO_SWIFTMODULE
         NO_LINK_NAME
         INSTALL_WITH_SHARED
         IS_FRAGILE)
@@ -1032,6 +1038,7 @@ function(add_swift_target_library_single target name)
       ${SWIFTLIB_SINGLE_IS_SDK_OVERLAY_keyword}
       ${SWIFTLIB_SINGLE_IS_FRAGILE_keyword}
       ${SWIFTLIB_SINGLE_ONLY_SWIFTMODULE_keyword}
+      ${SWIFTLIB_SINGLE_NO_SWIFTMODULE_keyword}
       ${embed_bitcode_arg}
       ${SWIFTLIB_SINGLE_STATIC_keyword}
       ${SWIFTLIB_SINGLE_NO_LINK_NAME_keyword}
@@ -1683,6 +1690,8 @@ endfunction()
 #     [INSTALL]
 #     [IS_STDLIB]
 #     [IS_STDLIB_CORE]
+#     [ONLY_SWIFTMODULE]
+#     [NO_SWIFTMODULE]
 #     [INSTALL_WITH_SHARED]
 #     INSTALL_IN_COMPONENT comp
 #     DEPLOYMENT_VERSION_OSX version
@@ -1791,6 +1800,12 @@ endfunction()
 # IS_STDLIB_CORE
 #   Compile as the Swift standard library core.
 #
+# ONLY_SWIFTMODULE
+#   Do not build either static or shared, build just the .swiftmodule.
+#
+# NO_SWIFTMODULE
+#   Only build either static or shared, and skip the .swiftmodule.
+#
 # IS_SDK_OVERLAY
 #   Treat the library as a part of the Swift SDK overlay.
 #
@@ -1879,6 +1894,8 @@ function(add_swift_target_library name)
         IS_STDLIB_CORE
         IS_SWIFT_ONLY
         NOSWIFTRT
+        ONLY_SWIFTMODULE
+        NO_SWIFTMODULE
         OBJECT_LIBRARY
         SHARED
         STATIC
@@ -2490,6 +2507,8 @@ function(add_swift_target_library name)
         ${SWIFTLIB_IS_STDLIB_CORE_keyword}
         ${SWIFTLIB_IS_SDK_OVERLAY_keyword}
         ${SWIFTLIB_NOSWIFTRT_keyword}
+        ${SWIFTLIB_ONLY_SWIFTMODULE_keyword}
+        ${SWIFTLIB_NO_SWIFTMODULE_keyword}
         DARWIN_INSTALL_NAME_DIR "${SWIFTLIB_DARWIN_INSTALL_NAME_DIR}"
         INSTALL_IN_COMPONENT "${SWIFTLIB_INSTALL_IN_COMPONENT}"
         DEPLOYMENT_VERSION_OSX "${SWIFTLIB_DEPLOYMENT_VERSION_OSX}"

stdlib/cmake/modules/SwiftSource.cmake

@@ -49,7 +49,7 @@ function(handle_swift_sources
     dependency_sibgen_target_out_var_name
     sourcesvar externalvar name)
   cmake_parse_arguments(SWIFTSOURCES
-      "IS_MAIN;IS_STDLIB;IS_STDLIB_CORE;IS_SDK_OVERLAY;EMBED_BITCODE;STATIC;NO_LINK_NAME;IS_FRAGILE;ONLY_SWIFTMODULE"
+      "IS_MAIN;IS_STDLIB;IS_STDLIB_CORE;IS_SDK_OVERLAY;EMBED_BITCODE;STATIC;NO_LINK_NAME;IS_FRAGILE;ONLY_SWIFTMODULE;NO_SWIFTMODULE"
       "SDK;ARCHITECTURE;INSTALL_IN_COMPONENT;DEPLOYMENT_VERSION_OSX;DEPLOYMENT_VERSION_IOS;DEPLOYMENT_VERSION_TVOS;DEPLOYMENT_VERSION_WATCHOS;MACCATALYST_BUILD_FLAVOR;BOOTSTRAPPING;INSTALL_BINARY_SWIFTMODULE"
       "DEPENDS;COMPILE_FLAGS;MODULE_NAME;MODULE_DIR;ENABLE_LTO"
       ${ARGN})
@@ -66,6 +66,7 @@ function(handle_swift_sources
   translate_flag(${SWIFTSOURCES_NO_LINK_NAME} "NO_LINK_NAME" NO_LINK_NAME_arg)
   translate_flag(${SWIFTSOURCES_IS_FRAGILE} "IS_FRAGILE" IS_FRAGILE_arg)
   translate_flag(${SWIFTSOURCES_ONLY_SWIFTMODULE} "ONLY_SWIFTMODULE" ONLY_SWIFTMODULE_arg)
+  translate_flag(${SWIFTSOURCES_NO_SWIFTMODULE} "NO_SWIFTMODULE" NO_SWIFTMODULE_arg)
   if(DEFINED SWIFTSOURCES_BOOTSTRAPPING)
     set(BOOTSTRAPPING_arg "BOOTSTRAPPING" ${SWIFTSOURCES_BOOTSTRAPPING})
   endif()
@@ -161,6 +162,7 @@ function(handle_swift_sources
         ${BOOTSTRAPPING_arg}
         ${IS_FRAGILE_arg}
         ${ONLY_SWIFTMODULE_arg}
+        ${NO_SWIFTMODULE_arg}
         INSTALL_BINARY_SWIFTMODULE ${SWIFTSOURCES_INSTALL_BINARY_SWIFTMODULE}
         INSTALL_IN_COMPONENT "${SWIFTSOURCES_INSTALL_IN_COMPONENT}"
         DEPLOYMENT_VERSION_OSX ${SWIFTSOURCES_DEPLOYMENT_VERSION_OSX}
@@ -405,6 +407,8 @@ endfunction()
 #     [IS_MAIN]                         # This is an executable, not a library
 #     [IS_STDLIB]
 #     [IS_STDLIB_CORE]                  # This is the core standard library
+#     [ONLY_SWIFTMODULE]                # Emit swiftmodule only, no binary
+#     [NO_SWIFTMODULE]                  # Emit binary only, no swiftmodule
 #     [OPT_FLAGS]                       # Optimization flags (overrides SWIFT_OPTIMIZE)
 #     [MODULE_DIR]                      # Put .swiftmodule, .swiftdoc., and .o
 #                                       # into this directory.
@@ -419,7 +423,7 @@ function(_compile_swift_files
     dependency_sib_target_out_var_name dependency_sibopt_target_out_var_name
     dependency_sibgen_target_out_var_name)
   cmake_parse_arguments(SWIFTFILE
-    "IS_MAIN;IS_STDLIB;IS_STDLIB_CORE;IS_SDK_OVERLAY;EMBED_BITCODE;STATIC;IS_FRAGILE;ONLY_SWIFTMODULE"
+    "IS_MAIN;IS_STDLIB;IS_STDLIB_CORE;IS_SDK_OVERLAY;EMBED_BITCODE;STATIC;IS_FRAGILE;ONLY_SWIFTMODULE;NO_SWIFTMODULE"
     "OUTPUT;MODULE_NAME;INSTALL_IN_COMPONENT;DEPLOYMENT_VERSION_OSX;DEPLOYMENT_VERSION_IOS;DEPLOYMENT_VERSION_TVOS;DEPLOYMENT_VERSION_WATCHOS;MACCATALYST_BUILD_FLAVOR;BOOTSTRAPPING;INSTALL_BINARY_SWIFTMODULE"
     "SOURCES;FLAGS;DEPENDS;SDK;ARCHITECTURE;OPT_FLAGS;MODULE_DIR"
     ${ARGN})
@@ -678,6 +682,10 @@ function(_compile_swift_files
   get_bootstrapping_path(lib_dir ${SWIFTLIB_DIR} "${SWIFTFILE_BOOTSTRAPPING}")
 
   if(NOT SWIFTFILE_IS_MAIN)
+    list(APPEND swift_flags "-parse-as-library")
+  endif()
+
+  if(NOT SWIFTFILE_IS_MAIN AND NOT SWIFTFILE_NO_SWIFTMODULE)
     # Determine the directory where the module file should be placed.
     if(SWIFTFILE_MODULE_DIR)
       set(module_dir "${SWIFTFILE_MODULE_DIR}")
@@ -687,8 +695,6 @@ function(_compile_swift_files
       message(FATAL_ERROR "Don't know where to put the module files")
     endif()
 
-    list(APPEND swift_flags "-parse-as-library")
-
     set(module_base "${module_dir}/${SWIFTFILE_MODULE_NAME}")
 
     set(module_dir_static "${SWIFTSTATICLIB_DIR}/${library_subdir}")
@@ -1068,7 +1074,7 @@ function(_compile_swift_files
   #
   # We only build these when we are not producing a main file. We could do this
   # with sib/sibgen, but it is useful for looking at the stdlib.
-  if (NOT SWIFTFILE_IS_MAIN)
+  if (NOT SWIFTFILE_IS_MAIN AND NOT SWIFTFILE_NO_SWIFTMODULE)
     add_custom_command_target(
         module_dependency_target
         COMMAND

stdlib/toolchain/CompatibilitySpan/CMakeLists.txt

@@ -17,6 +17,8 @@ if(CMAKE_SYSTEM_NAME STREQUAL "Darwin" AND DEFINED SWIFT_STDLIB_LIBRARY_BUILD_TY
       -module-abi-name Swift
       -DSPAN_COMPATIBILITY_STUB
 
+    NO_SWIFTMODULE
+
     DEPLOYMENT_VERSION_OSX ${COMPATIBILITY_MINIMUM_DEPLOYMENT_VERSION_OSX}
     DEPLOYMENT_VERSION_IOS ${COMPATIBILITY_MINIMUM_DEPLOYMENT_VERSION_IOS}
     DEPLOYMENT_VERSION_TVOS ${COMPATIBILITY_MINIMUM_DEPLOYMENT_VERSION_TVOS}

validation-test/ParseableInterface/verify_all_overlays.py

@@ -48,6 +48,7 @@ for filename in os.listdir(sdk_overlay_dir):
         "SwiftLang",
         # swiftCxxStdlib uses `-module-interface-preserve-types-as-written`
         "CxxStdlib",
+        "CompatibilitySpan",
     ]:
         continue