Revert "dispatch: attempt to use a VFS overlay"

This reverts commit ed909bb.

Author: MaxDesiatov

.gitignore

@@ -29,3 +29,4 @@ config
 configure
 libtool
 .dirstamp
+/dispatch/module.modulemap

dispatch/CMakeLists.txt

@@ -1,13 +1,4 @@
 
-if(CMAKE_SYSTEM_NAME STREQUAL Darwin)
-  set(DISPATCH_MODULE_MAP ${PROJECT_SOURCE_DIR}/dispatch/darwin/module.modulemap)
-else()
-  set(DISPATCH_MODULE_MAP ${PROJECT_SOURCE_DIR}/dispatch/generic/module.modulemap)
-endif()
-configure_file(dispatch-vfs.yaml.in
-  ${CMAKE_BINARY_DIR}/dispatch-vfs-overlay.yaml
-  @ONLY)
-
 install(FILES
           base.h
           block.h
@@ -25,8 +16,19 @@ install(FILES
         DESTINATION
           "${INSTALL_DISPATCH_HEADERS_DIR}")
 if(ENABLE_SWIFT)
+  set(base_dir "${CMAKE_CURRENT_SOURCE_DIR}")
+  if(NOT BUILD_SHARED_LIBS)
+    set(base_dir "${CMAKE_CURRENT_SOURCE_DIR}/generic_static")
+  endif()
+
+  get_filename_component(
+    MODULE_MAP
+    module.modulemap
+    REALPATH
+    BASE_DIR "${base_dir}")
+
   install(FILES
-            ${DISPATCH_MODULE_MAP}
+            ${MODULE_MAP}
           DESTINATION
             "${INSTALL_DISPATCH_HEADERS_DIR}")
 endif()

dispatch/dispatch-vfs.yaml.in

@@ -18,6 +18,18 @@ target_include_directories(DispatchStubs PRIVATE
 set_target_properties(DispatchStubs PROPERTIES
   POSITION_INDEPENDENT_CODE YES)
 
+
+if(CMAKE_SYSTEM_NAME STREQUAL Darwin)
+  add_custom_command(OUTPUT ${PROJECT_SOURCE_DIR}/dispatch/module.modulemap
+    COMMAND ${CMAKE_COMMAND} -E copy_if_different ${PROJECT_SOURCE_DIR}/dispatch/darwin/module.modulemap ${PROJECT_SOURCE_DIR}/dispatch/module.modulemap)
+else()
+  add_custom_command(OUTPUT ${PROJECT_SOURCE_DIR}/dispatch/module.modulemap
+    COMMAND ${CMAKE_COMMAND} -E copy_if_different ${PROJECT_SOURCE_DIR}/dispatch/generic/module.modulemap ${PROJECT_SOURCE_DIR}/dispatch/module.modulemap)
+endif()
+add_custom_target(module-map ALL
+  DEPENDS ${PROJECT_SOURCE_DIR}/dispatch/module.modulemap)
+
+
 add_library(swiftDispatch
   Block.swift
   Data.swift
@@ -33,8 +45,6 @@ target_compile_options(swiftDispatch PRIVATE
   "SHELL:-Xcc -fmodule-map-file=${PROJECT_SOURCE_DIR}/dispatch/module.modulemap"
   "SHELL:-Xcc -I${PROJECT_SOURCE_DIR}"
   "SHELL:-Xcc -I${PROJECT_SOURCE_DIR}/src/swift/shims")
-target_compile_options(swiftDispatch PUBLIC
-  "SHELL:-vfsoverlay ${CMAKE_BINARY_DIR}/dispatch-vfs-overlay.yaml")
 set_target_properties(swiftDispatch PROPERTIES
   Swift_MODULE_NAME Dispatch
   Swift_MODULE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/swift
@@ -44,6 +54,7 @@ target_link_libraries(swiftDispatch PRIVATE
   BlocksRuntime::BlocksRuntime)
 target_link_libraries(swiftDispatch PUBLIC
   dispatch)
+add_dependencies(swiftDispatch module-map)
 
 get_swift_host_arch(swift_arch)
 install(FILES