[CMake] Export SwiftDriver so other CMake projects can link against it

Author: DougGregor

CMakeLists.txt

@@ -44,3 +44,4 @@ find_package(Foundation QUIET)
 find_package(Yams CONFIG REQUIRED)
 
 add_subdirectory(Sources)
+add_subdirectory(cmake/modules)

Sources/SwiftDriver/CMakeLists.txt

@@ -68,3 +68,10 @@ target_link_libraries(SwiftDriver PUBLIC
   llbuildSwift
   CYaml
   Yams)
+
+set_property(GLOBAL APPEND PROPERTY SWIFTDRIVER_EXPORTS SwiftDriver)
+
+# NOTE: workaround for CMake not setting up include flags yet
+set_target_properties(SwiftDriver PROPERTIES
+  INTERFACE_INCLUDE_DIRECTORIES ${CMAKE_Swift_MODULE_DIRECTORY})
+

Sources/SwiftOptions/CMakeLists.txt

@@ -15,9 +15,12 @@ add_library(SwiftOptions
   OptionParsing.swift
   Options.swift
   PrefixTrie.swift)
+
 target_link_libraries(SwiftOptions PUBLIC
   TSCBasic)
 
+set_property(GLOBAL APPEND PROPERTY SWIFTDRIVER_EXPORTS SwiftOptions)
+
 # NOTE: workaround for CMake not setting up include flags yet
 set_target_properties(SwiftOptions PROPERTIES
   INTERFACE_INCLUDE_DIRECTORIES ${CMAKE_Swift_MODULE_DIRECTORY})

cmake/modules/CMakeLists.txt

@@ -0,0 +1,8 @@
+set(SWIFTDRIVER_EXPORTS_FILE ${CMAKE_CURRENT_BINARY_DIR}/SwiftDriverExports.cmake)
+
+configure_file(SwiftDriverConfig.cmake.in
+  ${CMAKE_CURRENT_BINARY_DIR}/SwiftDriverConfig.cmake)
+
+get_property(SWIFTDRIVER_EXPORTS GLOBAL PROPERTY SWIFTDRIVER_EXPORTS)
+export(TARGETS ${SWIFTDRIVER_EXPORTS}
+  FILE ${SWIFTDRIVER_EXPORTS_FILE})

cmake/modules/SwiftDriverConfig.cmake.in

@@ -0,0 +1,3 @@
+if(NOT TARGET SwiftDriver)
+  include(@SWIFTDRIVER_EXPORTS_FILE@)
+endif()