VS: Detect the compiler id and tool location

Configure a hand-generated Visual Studio project to build the compiler id
source file since we cannot run the compiler command-line tool directly.
Add a post-build command to print out the full path to the compiler tool.
Parse the full path to the compiler tool from the build output.

Modules/CMakeDetermineCCompiler.cmake

@@ -40,10 +40,6 @@ if(NOT CMAKE_C_COMPILER_NAMES)
 endif()
 
 if(${CMAKE_GENERATOR} MATCHES "Visual Studio")
-  set(CMAKE_C_COMPILER_ID_RUN 1)
-  set(CMAKE_C_PLATFORM_ID "Windows")
-  set(CMAKE_C_COMPILER_ID "MSVC")
-  set(CMAKE_C_COMPILER "${CMAKE_GENERATOR_CC}")
 elseif("${CMAKE_GENERATOR}" MATCHES "Xcode")
   set(CMAKE_C_COMPILER_XCODE_TYPE sourcecode.c.c)
 else()

Modules/CMakeDetermineCXXCompiler.cmake

@@ -39,10 +39,6 @@ if(NOT CMAKE_CXX_COMPILER_NAMES)
 endif()
 
 if(${CMAKE_GENERATOR} MATCHES "Visual Studio")
-  set(CMAKE_CXX_COMPILER_ID_RUN 1)
-  set(CMAKE_CXX_PLATFORM_ID "Windows")
-  set(CMAKE_CXX_COMPILER_ID "MSVC")
-  set(CMAKE_CXX_COMPILER "${CMAKE_GENERATOR_CXX}")
 elseif("${CMAKE_GENERATOR}" MATCHES "Xcode")
   set(CMAKE_CXX_COMPILER_XCODE_TYPE sourcecode.cpp.cpp)
 else()

Modules/CMakeDetermineCompilerId.cmake

@@ -107,7 +107,68 @@ Id flags: ${testflags}
 ")
 
   # Compile the compiler identification source.
-  if("${CMAKE_GENERATOR}" MATCHES "Xcode")
+  if("${CMAKE_GENERATOR}" MATCHES "Visual Studio ([0-9]+)( .NET)?( 200[358])? *((Win64|IA64|ARM))?")
+    set(vs_version ${CMAKE_MATCH_1})
+    set(vs_arch ${CMAKE_MATCH_4})
+    set(id_lang "${lang}")
+    set(id_cl cl.exe)
+    if(NOT "${vs_version}" VERSION_LESS 10)
+      set(v 10)
+      set(ext vcxproj)
+    elseif(NOT "${vs_version}" VERSION_LESS 7)
+      set(id_version ${vs_version}.00)
+      set(v 7)
+      set(ext vcproj)
+    else()
+      set(v 6)
+      set(ext dsp)
+    endif()
+    if("${vs_arch}" STREQUAL "Win64")
+      set(id_machine_7 17)
+      set(id_machine_10 MachineX64)
+      set(id_arch x64)
+    elseif("${vs_arch}" STREQUAL "IA64")
+      set(id_machine_7 5)
+      set(id_machine_10 MachineIA64)
+      set(id_arch ia64)
+    else()
+      set(id_machine_6 x86)
+      set(id_machine_7 1)
+      set(id_machine_10 MachineX86)
+      set(id_arch Win32)
+    endif()
+    if(CMAKE_VS_PLATFORM_TOOLSET)
+      set(id_toolset "<PlatformToolset>${CMAKE_VS_PLATFORM_TOOLSET}</PlatformToolset>")
+    else()
+      set(id_toolset "")
+    endif()
+    if("${CMAKE_MAKE_PROGRAM}" MATCHES "[Mm][Ss][Bb][Uu][Ii][Ll][Dd]")
+      set(build /p:Configuration=Debug /p:Platform=@id_arch@)
+    elseif("${CMAKE_MAKE_PROGRAM}" MATCHES "[Mm][Ss][Dd][Ee][Vv]")
+      set(build /make)
+    else()
+      set(build /build Debug)
+    endif()
+    set(id_dir ${CMAKE_${lang}_COMPILER_ID_DIR})
+    get_filename_component(id_src "${src}" NAME)
+    configure_file(${CMAKE_ROOT}/Modules/CompilerId/VS-${v}.${ext}.in
+      ${id_dir}/CompilerId${lang}.${ext} @ONLY IMMEDIATE)
+    execute_process(
+      COMMAND ${CMAKE_MAKE_PROGRAM} CompilerId${lang}.${ext} ${build}
+      WORKING_DIRECTORY ${CMAKE_${lang}_COMPILER_ID_DIR}
+      OUTPUT_VARIABLE CMAKE_${lang}_COMPILER_ID_OUTPUT
+      ERROR_VARIABLE CMAKE_${lang}_COMPILER_ID_OUTPUT
+      RESULT_VARIABLE CMAKE_${lang}_COMPILER_ID_RESULT
+      )
+    # Match the compiler location line printed out.
+    if("${CMAKE_${lang}_COMPILER_ID_OUTPUT}" MATCHES "CMAKE_${lang}_COMPILER=([^%\r\n]+)[\r\n]")
+      set(_comp "${CMAKE_MATCH_1}")
+      if(EXISTS "${_comp}")
+        file(TO_CMAKE_PATH "${_comp}" _comp)
+        set(CMAKE_${lang}_COMPILER_ID_TOOL "${_comp}" PARENT_SCOPE)
+      endif()
+    endif()
+  elseif("${CMAKE_GENERATOR}" MATCHES "Xcode")
     set(id_lang "${lang}")
     set(id_type ${CMAKE_${lang}_COMPILER_XCODE_TYPE})
     set(id_dir ${CMAKE_${lang}_COMPILER_ID_DIR})

Modules/CompilerId/VS-10.vcxproj.in

@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|@id_arch@">
+      <Configuration>Debug</Configuration>
+      <Platform>@id_arch@</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{CAE07175-D007-4FC3-BFE8-47B392814159}</ProjectGuid>
+    <RootNamespace>CompilerId@id_lang@</RootNamespace>
+    <Keyword>Win32Proj</Keyword>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|@id_arch@'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    @id_toolset@
+    <CharacterSet>MultiByte</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <PropertyGroup>
+    <_ProjectFileVersion>10.0.30319.1</_ProjectFileVersion>
+    <OutDir Condition="'$(Configuration)|$(Platform)'=='Debug|@id_arch@'">.\</OutDir>
+    <IntDir Condition="'$(Configuration)|$(Platform)'=='Debug|@id_arch@'">$(Configuration)\</IntDir>
+    <LinkIncremental Condition="'$(Configuration)|$(Platform)'=='Debug|@id_arch@'">false</LinkIncremental>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|@id_arch@'">
+    <ClCompile>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <MinimalRebuild>false</MinimalRebuild>
+      <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
+      <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>TurnOffAllWarnings</WarningLevel>
+      <DebugInformationFormat>
+      </DebugInformationFormat>
+    </ClCompile>
+    <Link>
+      <GenerateDebugInformation>false</GenerateDebugInformation>
+      <SubSystem>Console</SubSystem>
+      <TargetMachine>@id_machine_10@</TargetMachine>
+    </Link>
+    <PostBuildEvent>
+      <Command>for %%i in (@id_cl@) do %40echo CMAKE_@id_lang@_COMPILER=%%~$PATH:i</Command>
+    </PostBuildEvent>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="@id_src@" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+</Project>

Modules/CompilerId/VS-6.dsp.in

@@ -0,0 +1,48 @@
+# Microsoft Developer Studio Project File - Name="CompilerId@id_lang@" - Package Owner=<4>
+# Microsoft Developer Studio Generated Build File, Format Version 6.00
+
+# TARGTYPE "Win32 (@id_machine_6@) Application" 0x0101
+
+CFG=CompilerId@id_lang@ - Win32 Debug
+!MESSAGE This is not a valid makefile. To build this project using NMAKE,
+!MESSAGE use the Export Makefile command and run
+!MESSAGE
+!MESSAGE NMAKE /f "CompilerId@id_lang@.mak".
+!MESSAGE
+!MESSAGE You can specify a configuration when running NMAKE
+!MESSAGE by defining the macro CFG on the command line. For example:
+!MESSAGE
+!MESSAGE NMAKE /f "CompilerId@id_lang@.mak" CFG="CompilerId@id_lang@ - Win32 Debug"
+!MESSAGE
+!MESSAGE Possible choices for configuration are:
+!MESSAGE
+!MESSAGE "CompilerId@id_lang@ - Win32 Debug" (based on "Win32 (@id_machine_6@) Application")
+!MESSAGE
+
+# Begin Project
+# PROP AllowPerConfigDependencies 0
+CPP=cl.exe
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 1
+# PROP Output_Dir "."
+# PROP Intermediate_Dir "Debug"
+# PROP Target_Dir ""
+# ADD CPP /nologo /MDd /c
+LINK32=link.exe
+# ADD LINK32 /nologo /version:0.0 /subsystem:console /machine:@id_machine_6@ /out:"CompilerId@id_lang@.exe" /IGNORE:4089
+# Begin Special Build Tool
+SOURCE="$(InputPath)"
+PostBuild_Cmds=for %%i in (@id_cl@) do @echo CMAKE_@id_lang@_COMPILER=%%~$PATH:i
+# End Special Build Tool
+# Begin Target
+
+# Name "CompilerId@id_lang@ - Win32 Debug"
+# Begin Group "Source Files"
+
+# Begin Source File
+
+SOURCE="@id_src@"
+# End Source File
+# End Group
+# End Target
+# End Project

Modules/CompilerId/VS-7.vcproj.in

@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="Windows-1252"?>
+<VisualStudioProject
+	ProjectType="Visual C++"
+	Version="@id_version@"
+	Name="CompilerId@id_lang@"
+	ProjectGUID="{CAE07175-D007-4FC3-BFE8-47B392814159}"
+	RootNamespace="CompilerId@id_lang@"
+	Keyword="Win32Proj"
+	TargetFrameworkVersion="196613"
+	>
+	<Platforms>
+		<Platform
+			Name="@id_arch@"
+		/>
+	</Platforms>
+	<Configurations>
+		<Configuration
+			Name="Debug|@id_arch@"
+			OutputDirectory="."
+			IntermediateDirectory="$(ConfigurationName)"
+			ConfigurationType="1"
+			CharacterSet="1"
+			>
+			<Tool
+				Name="VCCLCompilerTool"
+				Optimization="0"
+				PreprocessorDefinitions=""
+				MinimalRebuild="false"
+				BasicRuntimeChecks="3"
+				RuntimeLibrary="3"
+				UsePrecompiledHeader="0"
+				WarningLevel="0"
+				DebugInformationFormat="0"
+			/>
+			<Tool
+				Name="VCLinkerTool"
+				LinkIncremental="1"
+				GenerateDebugInformation="false"
+				SubSystem="1"
+				TargetMachine="@id_machine_7@"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+				CommandLine="for %%i in (@id_cl@) do @echo CMAKE_@id_lang@_COMPILER=%%~$PATH:i"
+			/>
+		</Configuration>
+	</Configurations>
+	<Files>
+		<Filter
+			Name="Source Files"
+			Filter="cpp;c"
+			UniqueIdentifier="{4FC737F1-C7A5-4376-A066-2A32D752A2FF}"
+			>
+			<File
+				RelativePath="@id_src@"
+				>
+			</File>
+		</Filter>
+	</Files>
+</VisualStudioProject>