Merge topic 'more-swift2-fixes'

9cdf6ef4 Swift: Add proper Swift compiler test
1aa29f0d Swift: Remove positive Swift language tests
d778a1c2 Swift: Require Xcode 6.1 and for MacOS X at least SDK 10.10
4da60024 Swift: Fix Compiler-Id detection for Swift 2
874a265c Swift: Make SwiftMix compatible with Swift 2

Modules/CMakeTestSwiftCompiler.cmake

@@ -12,4 +12,54 @@
 # (To distribute this file outside of CMake, substitute the full
 #  License text for the above reference.)
 
-set(CMAKE_Swift_COMPILER_WORKS 1)
+if(CMAKE_Swift_COMPILER_FORCED)
+  # The compiler configuration was forced by the user.
+  # Assume the user has configured all compiler information.
+  set(CMAKE_Swift_COMPILER_WORKS TRUE)
+  return()
+endif()
+
+include(CMakeTestCompilerCommon)
+
+# Remove any cached result from an older CMake version.
+# We now store this in CMakeSwiftCompiler.cmake.
+unset(CMAKE_Swift_COMPILER_WORKS CACHE)
+
+# This file is used by EnableLanguage in cmGlobalGenerator to
+# determine that that selected C++ compiler can actually compile
+# and link the most basic of programs.   If not, a fatal error
+# is set and cmake stops processing commands and will not generate
+# any makefiles or projects.
+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
+    OUTPUT_VARIABLE __CMAKE_Swift_COMPILER_OUTPUT)
+  # Move result from cache to normal variable.
+  set(CMAKE_Swift_COMPILER_WORKS ${CMAKE_Swift_COMPILER_WORKS})
+  unset(CMAKE_Swift_COMPILER_WORKS CACHE)
+  set(Swift_TEST_WAS_RUN 1)
+endif()
+
+if(NOT CMAKE_Swift_COMPILER_WORKS)
+  PrintTestCompilerStatus("Swift" " -- broken")
+  file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
+    "Determining if the Swift compiler works failed with "
+    "the following output:\n${__CMAKE_Swift_COMPILER_OUTPUT}\n\n")
+  message(FATAL_ERROR "The Swift compiler \"${CMAKE_Swift_COMPILER}\" "
+    "is not able to compile a simple test program.\nIt fails "
+    "with the following output:\n ${__CMAKE_Swift_COMPILER_OUTPUT}\n\n"
+    "CMake will not be able to correctly generate this project.")
+else()
+  if(Swift_TEST_WAS_RUN)
+    PrintTestCompilerStatus("Swift" " -- works")
+    file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
+      "Determining if the Swift compiler works passed with "
+      "the following output:\n${__CMAKE_Swift_COMPILER_OUTPUT}\n\n")
+  endif()
+endif()
+
+unset(__CMAKE_Swift_COMPILER_OUTPUT)

Modules/CompilerId/main.swift.in

@@ -1 +1 @@
-println("CMakeSwiftCompilerId")
+print("CMakeSwiftCompilerId")

Tests/CMakeLists.txt

@@ -213,6 +213,29 @@ if(BUILD_TESTING)
         set(CMake_TEST_XCODE_VERSION "${CMAKE_MATCH_1}")
       endif()
     endif()
+    if(CMAKE_OSX_SYSROOT)
+      execute_process(
+        COMMAND xcodebuild -sdk ${CMAKE_OSX_SYSROOT} -version ProductName
+        OUTPUT_VARIABLE _stdout
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+        ERROR_VARIABLE _stderr
+        RESULT_VARIABLE _failed
+        )
+      if(NOT _failed)
+        set(CMAKE_OSX_SDKPRODUCT "${_stdout}")
+      endif()
+
+      execute_process(
+        COMMAND xcodebuild -sdk ${CMAKE_OSX_SYSROOT} -version SDKVersion
+        OUTPUT_VARIABLE _stdout
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+        ERROR_VARIABLE _stderr
+        RESULT_VARIABLE _failed
+        )
+      if(NOT _failed)
+        set(CMAKE_OSX_SDKVERSION "${_stdout}")
+      endif()
+    endif()
   endif()
 
   # Use 1500 or CTEST_TEST_TIMEOUT for long test timeout value,
@@ -258,10 +281,14 @@ if(BUILD_TESTING)
   ADD_TEST_MACRO(MissingSourceFile MissingSourceFile)
   set_tests_properties(MissingSourceFile PROPERTIES
     PASS_REGULAR_EXPRESSION "CMake Error at CMakeLists.txt:3 \\(add_executable\\):[ \r\n]*Cannot find source file:[ \r\n]*DoesNotExist/MissingSourceFile.c")
-  if(CMake_TEST_XCODE_VERSION AND NOT CMake_TEST_XCODE_VERSION VERSION_LESS 6.1)
-    if(CMAKE_GENERATOR STREQUAL "Xcode")
-      ADD_TEST_MACRO(SwiftMix SwiftMix)
-      ADD_TEST_MACRO(SwiftOnly SwiftOnly)
+  if(CMake_TEST_XCODE_VERSION AND CMAKE_OSX_SDKVERSION AND CMAKE_OSX_SDKPRODUCT)
+    if((NOT CMake_TEST_XCODE_VERSION VERSION_LESS 6.1) AND
+       ((NOT CMAKE_OSX_SDKPRODUCT STREQUAL "Mac OS X") OR
+        (NOT CMAKE_OSX_SDKVERSION VERSION_LESS 10.10)))
+      if(CMAKE_GENERATOR STREQUAL "Xcode")
+        ADD_TEST_MACRO(SwiftMix SwiftMix)
+        ADD_TEST_MACRO(SwiftOnly SwiftOnly)
+      endif()
     endif()
   endif()
   if(CMAKE_Fortran_COMPILER)

Tests/RunCMake/Swift/Enable-stdout.txt

@@ -1 +0,0 @@
--- The Swift compiler identification is Apple

Tests/RunCMake/Swift/Enable.cmake

@@ -1 +0,0 @@
-enable_language(Swift)

Tests/RunCMake/Swift/RunCMakeTest.cmake

@@ -3,8 +3,6 @@ include(RunCMake)
 if(RunCMake_GENERATOR STREQUAL Xcode)
   if(XCODE_BELOW_6_1)
     run_cmake(XcodeTooOld)
-  else()
-    run_cmake(Enable)
   endif()
 else()
   run_cmake(NotSupported)

Tests/SwiftMix/SwiftMain.swift

@@ -1,8 +1,10 @@
-@objc class SwiftMainClass {
+import Foundation
+
+@objc class SwiftMainClass : NSObject {
   class func SwiftMain(argc:Int, argv:UnsafePointer<UnsafePointer<CChar>>) -> Int32 {
     dump("argc: \(argc)")
     for (var i = 0; i < argc; ++i) {
-      var argi = String.fromCString(argv[i])
+      let argi = String.fromCString(argv[i])
       dump("arg[\(i)]: \(argi)");
     }
     return 0;