Modules: add build rules for Swift Ninja support

Add rules to support building Swift sources using Ninja.

Modules/CMakeDetermineSwiftCompiler.cmake

@@ -1,15 +1,46 @@
 # Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
 # file Copyright.txt or https://cmake.org/licensing for details.
 
-
 include(${CMAKE_ROOT}/Modules/CMakeDetermineCompiler.cmake)
 
+# Local system-specific compiler preferences for this language.
+include(Platform/${CMAKE_SYSTEM_NAME}-Determine-Swift OPTIONAL)
+include(Platform/${CMAKE_SYSTEM_NAME}-Swift OPTIONAL)
+if(NOT CMAKE_Swift_COMPILER_NAMES)
+  set(CMAKE_Swift_COMPILER_NAMES swiftc)
+endif()
+
 if("${CMAKE_GENERATOR}" STREQUAL "Xcode")
   if(XCODE_VERSION VERSION_LESS 6.1)
     message(FATAL_ERROR "Swift language not supported by Xcode ${XCODE_VERSION}")
   endif()
   set(CMAKE_Swift_COMPILER_XCODE_TYPE sourcecode.swift)
   _cmake_find_compiler_path(Swift)
+elseif("${CMAKE_GENERATOR}" STREQUAL "Ninja")
+  if(CMAKE_Swift_COMPILER)
+    _cmake_find_compiler_path(Swift)
+  else()
+    set(CMAKE_Swift_COMPILER_INIT NOTFOUND)
+
+    if(NOT $ENV{SWIFTC} STREQUAL "")
+      get_filename_component(CMAKE_Swift_COMPILER_INIT $ENV{SWIFTC} PROGRAM
+        PROGRAM_ARGS CMAKE_Swift_FLAGS_ENV_INIT)
+      if(CMAKE_Swift_FLAGS_ENV_INIT)
+        set(CMAKE_Swift_COMPILER_ARG1 "${CMAKE_Swift_FLAGS_ENV_INIT}" CACHE
+          STRING "First argument to the Swift compiler")
+      endif()
+      if(NOT EXISTS ${CMAKE_Swift_COMPILER_INIT})
+        message(FATAL_ERROR "Could not find compiler set in environment variable SWIFTC\n$ENV{SWIFTC}.\n${CMAKE_Swift_COMPILER_INIT}")
+      endif()
+    endif()
+
+    if(NOT CMAKE_Swift_COMPILER_INIT)
+      set(CMAKE_Swift_COMPILER_LIST swiftc ${_CMAKE_TOOLCHAIN_PREFIX}swiftc)
+    endif()
+
+    _cmake_find_compiler(Swift)
+  endif()
+  mark_as_advanced(CMAKE_Swift_COMPILER)
 else()
   message(FATAL_ERROR "Swift language not supported by \"${CMAKE_GENERATOR}\" generator")
 endif()
@@ -18,11 +49,13 @@ endif()
 if(NOT CMAKE_Swift_COMPILER_ID_RUN)
   set(CMAKE_Swift_COMPILER_ID_RUN 1)
 
-  list(APPEND CMAKE_Swift_COMPILER_ID_MATCH_VENDORS Apple)
-  set(CMAKE_Swift_COMPILER_ID_MATCH_VENDOR_REGEX_Apple "com.apple.xcode.tools.swift.compiler")
+  if("${CMAKE_GENERATOR}" STREQUAL "Xcode")
+    list(APPEND CMAKE_Swift_COMPILER_ID_MATCH_VENDORS Apple)
+    set(CMAKE_Swift_COMPILER_ID_MATCH_VENDOR_REGEX_Apple "com.apple.xcode.tools.swift.compiler")
 
-  set(CMAKE_Swift_COMPILER_ID_TOOL_MATCH_REGEX "\nCompileSwiftSources[^\n]*(\n[ \t]+[^\n]*)*\n[ \t]+([^ \t\r\n]+)[^\r\n]* -c[^\r\n]*CompilerIdSwift/CompilerId/main.swift")
-  set(CMAKE_Swift_COMPILER_ID_TOOL_MATCH_INDEX 2)
+    set(CMAKE_Swift_COMPILER_ID_TOOL_MATCH_REGEX "\nCompileSwiftSources[^\n]*(\n[ \t]+[^\n]*)*\n[ \t]+([^ \t\r\n]+)[^\r\n]* -c[^\r\n]*CompilerIdSwift/CompilerId/main.swift")
+    set(CMAKE_Swift_COMPILER_ID_TOOL_MATCH_INDEX 2)
+  endif()
 
   # Try to identify the compiler.
   set(CMAKE_Swift_COMPILER_ID)
@@ -40,6 +73,6 @@ unset(_CMAKE_PROCESSING_LANGUAGE)
 
 # configure variables set in this file for fast reload later on
 configure_file(${CMAKE_ROOT}/Modules/CMakeSwiftCompiler.cmake.in
-  ${CMAKE_PLATFORM_INFO_DIR}/CMakeSwiftCompiler.cmake
-  @ONLY
-  )
+               ${CMAKE_PLATFORM_INFO_DIR}/CMakeSwiftCompiler.cmake @ONLY)
+
+set(CMAKE_Swift_COMPILER_ENV_VAR "SWIFTC")

Modules/CMakeSwiftCompiler.cmake.in

@@ -1,5 +1,14 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
 set(CMAKE_Swift_COMPILER "@CMAKE_Swift_COMPILER@")
 set(CMAKE_Swift_COMPILER_ID "@CMAKE_Swift_COMPILER_ID@")
+set(CMAKE_Swift_COMPILER_VERSION "@CMAKE_Swift_COMPILER_VERSION@")
+
+set(CMAKE_Swift_COMPILER_LOADED 1)
+set(CMAKE_Swift_COMPILER_WORKS "@CMAKE_Swift_COMPILER_WORKS@")
+
+set(CMAKE_Swift_COMPILER_ENV_VAR "SWIFTC")
 
 set(CMAKE_Swift_COMPILER_ID_RUN 1)
 set(CMAKE_Swift_SOURCE_FILE_EXTENSIONS swift)

Modules/CMakeSwiftInformation.cmake

@@ -1,32 +1,61 @@
 # Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
 # file Copyright.txt or https://cmake.org/licensing for details.
 
-
-set(CMAKE_Swift_OUTPUT_EXTENSION .o)
-set(CMAKE_INCLUDE_FLAG_Swift "-I")
+if(UNIX)
+  set(CMAKE_Swift_OUTPUT_EXTENSION .o)
+else()
+  set(CMAKE_Swift_OUTPUT_EXTENSION .obj)
+endif()
 
 # Load compiler-specific information.
 if(CMAKE_Swift_COMPILER_ID)
   include(Compiler/${CMAKE_Swift_COMPILER_ID}-Swift OPTIONAL)
-endif()
 
-# load the system- and compiler specific files
-if(CMAKE_Swift_COMPILER_ID)
-  # load a hardware specific file, mostly useful for embedded compilers
   if(CMAKE_SYSTEM_PROCESSOR)
     include(Platform/${CMAKE_EFFECTIVE_SYSTEM_NAME}-${CMAKE_Swift_COMPILER_ID}-Swift-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL)
   endif()
   include(Platform/${CMAKE_EFFECTIVE_SYSTEM_NAME}-${CMAKE_Swift_COMPILER_ID}-Swift OPTIONAL)
 endif()
 
-# for most systems a module is the same as a shared library
-# so unless the variable CMAKE_MODULE_EXISTS is set just
-# copy the values from the LIBRARY variables
-if(NOT CMAKE_MODULE_EXISTS)
-  set(CMAKE_SHARED_MODULE_Swift_FLAGS ${CMAKE_SHARED_LIBRARY_Swift_FLAGS})
-  set(CMAKE_SHARED_MODULE_CREATE_Swift_FLAGS ${CMAKE_SHARED_LIBRARY_CREATE_Swift_FLAGS})
+set(CMAKE_INCLUDE_FLAG_Swift "-I")
+set(CMAKE_INCLUDE_FLAG_SEP_Swift " ")
+set(CMAKE_Swift_DEFINE_FLAG -D)
+set(CMAKE_Swift_COMPILE_OPTIONS_TARGET "-target ")
+set(CMAKE_Swift_COMPILER_ARG1 -frontend)
+
+set(CMAKE_Swift_FLAGS_DEBUG_INIT "-g")
+set(CMAKE_Swift_FLAGS_RELEASE_INIT "-O")
+set(CMAKE_Swift_FLAGS_RELWITHDEBINFO_INIT "-O -g")
+set(CMAKE_Swift_FLAGS_MINSIZEREL_INIT "-Osize")
+
+# NOTE(compnerd) we do not have an object compile rule since we build the objects as part of the link step
+if(NOT CMAKE_Swift_COMPILE_OBJECT)
+  set(CMAKE_Swift_COMPILE_OBJECT ":")
 endif()
 
-include(CMakeCommonLanguageInclude)
+if(NOT CMAKE_Swift_CREATE_SHARED_LIBRARY)
+  if(CMAKE_Swift_COMPILER_TARGET)
+    set(CMAKE_Swift_CREATE_SHARED_LIBRARY "${CMAKE_Swift_COMPILER} -target <CMAKE_Swift_COMPILER_TARGET> -output-file-map <SWIFT_OUTPUT_FILE_MAP> -incremental -emit-library -o <TARGET> -module-name <SWIFT_MODULE_NAME> -module-link-name <SWIFT_LIBRARY_NAME> -emit-module -emit-module-path <SWIFT_MODULE> -emit-dependencies <FLAGS> <SWIFT_SOURCES> <LINK_FLAGS> <LINK_LIBRARIES>")
+  else()
+    set(CMAKE_Swift_CREATE_SHARED_LIBRARY "${CMAKE_Swift_COMPILER} -output-file-map <SWIFT_OUTPUT_FILE_MAP> -incremental -emit-library -o <TARGET> -module-name <SWIFT_MODULE_NAME> -module-link-name <SWIFT_LIBRARY_NAME> -emit-module -emit-module-path <SWIFT_MODULE> -emit-dependencies <FLAGS> <SWIFT_SOURCES> <LINK_FLAGS> <LINK_LIBRARIES>")
+  endif()
+endif()
+
+if(NOT CMAKE_Swift_CREATE_SHARED_MODULE)
+  set(CMAKE_Swift_CREATE_SHARED_MODULE ${CMAKE_Swift_CREATE_SHARED_LIBRARY})
+endif()
+
+if(NOT CMAKE_Swift_LINK_EXECUTABLE)
+  if(CMAKE_Swift_COMPILER_TARGET)
+    set(CMAKE_Swift_LINK_EXECUTABLE "${CMAKE_Swift_COMPILER} -target <CMAKE_Swift_COMPILER_TARGET> -output-file-map <SWIFT_OUTPUT_FILE_MAP> -incremental -emit-executable -o <TARGET> -emit-module -emit-module-path <SWIFT_MODULE> -emit-dependencies <FLAGS> <SWIFT_SOURCES> <LINK_FLAGS> <LINK_LIBRARIES>")
+  else()
+    set(CMAKE_Swift_LINK_EXECUTABLE "${CMAKE_Swift_COMPILER} -output-file-map <SWIFT_OUTPUT_FILE_MAP> -incremental -emit-executable -o <TARGET> -emit-module -emit-module-path <SWIFT_MODULE> -emit-dependencies <FLAGS> <SWIFT_SOURCES> <LINK_FLAGS> <LINK_LIBRARIES>")
+  endif()
+endif()
+
+if(NOT CMAKE_Swift_CREATE_STATIC_LIBRARY)
+  set(CMAKE_Swift_ARCHIVE_CREATE "<CMAKE_AR> crs <TARGET> <OBJECTS>")
+  set(CMAKE_Swift_ARCHIVE_FINISH "")
+endif()
 
 set(CMAKE_Swift_INFORMATION_LOADED 1)

Modules/CMakeTestSwiftCompiler.cmake

@@ -1,7 +1,6 @@
 # Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
 # file Copyright.txt or https://cmake.org/licensing for details.
 
-
 if(CMAKE_Swift_COMPILER_FORCED)
   # The compiler configuration was forced by the user.
   # Assume the user has configured all compiler information.
@@ -23,7 +22,6 @@ unset(CMAKE_Swift_COMPILER_WORKS CACHE)
 if(NOT CMAKE_Swift_COMPILER_WORKS)
   PrintTestCompilerStatus("Swift" "")
   file(WRITE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/main.swift
-    "import Foundation\n"
     "print(\"CMake\")\n")
   try_compile(CMAKE_Swift_COMPILER_WORKS ${CMAKE_BINARY_DIR}
     ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/main.swift
@@ -51,6 +49,11 @@ else()
       "Determining if the Swift compiler works passed with "
       "the following output:\n${__CMAKE_Swift_COMPILER_OUTPUT}\n\n")
   endif()
+
+  # Re-configure to save learned information.
+  configure_file(${CMAKE_ROOT}/Modules/CMakeSwiftCompiler.cmake.in
+                 ${CMAKE_PLATFORM_INFO_DIR}/CMakeSwiftCompiler.cmake @ONLY)
+  include(${CMAKE_PLATFORM_INFO_DIR}/CMakeSwiftCompiler.cmake)
 endif()
 
 unset(__CMAKE_Swift_COMPILER_OUTPUT)