From 6b4459d402f31fbfe4ea32c1df0b8adb0c1e672a Mon Sep 17 00:00:00 2001
From: Matt Pharr <matt.pharr@intel.com>
Date: Sun, 9 Oct 2011 07:32:51 -0700
Subject: [PATCH] Windows: fix some compiler warnings during build

---
 builtins.cpp      |   4 +-
 ispc.vcxproj      |  86 +++++++++++++-----------
 ispc_test.cpp     |   2 +-
 ispc_test.vcxproj |   2 +
 simple.vcxproj    | 164 ++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 216 insertions(+), 42 deletions(-)
 create mode 100755 simple.vcxproj

diff --git a/builtins.cpp b/builtins.cpp
index 1d12f5f4..4582adab 100644
--- a/builtins.cpp
+++ b/builtins.cpp
@@ -163,7 +163,9 @@ lLLVMTypeToISPCType(const llvm::Type *t, bool intAsUnsigned) {
                                                       intAsUnsigned);
             if (eltType == NULL)
                 return NULL;
-            return new ReferenceType(new ArrayType(eltType, at->getNumElements()),
+            // FIXME: this needs to be fixed when arrays can have 
+            // over 4G elements...
+            return new ReferenceType(new ArrayType(eltType, (int)at->getNumElements()),
                                      false);
         }
     }
diff --git a/ispc.vcxproj b/ispc.vcxproj
index 7594a3d4..5d012961 100755
--- a/ispc.vcxproj
+++ b/ispc.vcxproj
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?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|Win32">
@@ -11,28 +11,34 @@
     </ProjectConfiguration>
   </ItemGroup>
   <ItemGroup>
-    <ClCompile Include="ast.cpp" />
-    <ClCompile Include="builtins.cpp" />
+    <ClCompile Include="ast.cpp" />
+    <ClCompile Include="builtins.cpp" />
     <ClCompile Include="ctx.cpp" />
     <ClCompile Include="decl.cpp" />
-    <ClCompile Include="expr.cpp" />
-    <ClCompile Include="func.cpp" />
+    <ClCompile Include="expr.cpp" />
+    <ClCompile Include="func.cpp" />
     <ClCompile Include="gen-bitcode-avx.cpp" />
     <ClCompile Include="gen-bitcode-avx-x2.cpp" />
     <ClCompile Include="gen-bitcode-c-32.cpp" />
     <ClCompile Include="gen-bitcode-c-64.cpp" />
-    <ClCompile Include="gen-bitcode-dispatch.cpp" />
-    <ClCompile Include="gen-bitcode-sse2.cpp" />
+    <ClCompile Include="gen-bitcode-dispatch.cpp" />
+    <ClCompile Include="gen-bitcode-sse2.cpp" />
     <ClCompile Include="gen-bitcode-sse4.cpp" />
     <ClCompile Include="gen-bitcode-sse4-x2.cpp" />
     <ClCompile Include="gen-stdlib.cpp" />
     <ClCompile Include="ispc.cpp" />
-    <ClCompile Include="lex.cc" />
+    <ClCompile Include="lex.cc">
+      <DisableSpecificWarnings Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">4146;4800;4996;4355;4624;4005;4003;4018</DisableSpecificWarnings>
+      <DisableSpecificWarnings Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">4146;4800;4996;4355;4624;4005;4003;4018</DisableSpecificWarnings>
+    </ClCompile>
     <ClCompile Include="llvmutil.cpp" />
     <ClCompile Include="module.cpp" />
     <ClCompile Include="main.cpp" />
     <ClCompile Include="opt.cpp" />
-    <ClCompile Include="parse.cc" />
+    <ClCompile Include="parse.cc">
+      <DisableSpecificWarnings Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">4146;4800;4996;4355;4624;4005;4065</DisableSpecificWarnings>
+      <DisableSpecificWarnings Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">4146;4800;4996;4355;4624;4005;4065</DisableSpecificWarnings>
+    </ClCompile>
     <CustomBuild Include="builtins-c.c">
       <Command Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">%LLVM_INSTALL_DIR%\bin\clang -m32 -emit-llvm builtins-c.c -c -o - | %LLVM_INSTALL_DIR%\bin\llvm-dis - | python bitcode2cpp.py builtins-c-32.c &gt; gen-bitcode-c-32.cpp;
 %LLVM_INSTALL_DIR%\bin\clang -m64 -emit-llvm builtins-c.c -c -o - | %LLVM_INSTALL_DIR%\bin\llvm-dis - | python bitcode2cpp.py builtins-c-64.c &gt; gen-bitcode-c-64.cpp</Command>
@@ -49,12 +55,12 @@
     <ClCompile Include="util.cpp" />
   </ItemGroup>
   <ItemGroup>
-    <ClInclude Include="ast.h" />
-    <ClInclude Include="builtins.h" />
+    <ClInclude Include="ast.h" />
+    <ClInclude Include="builtins.h" />
     <ClInclude Include="ctx.h" />
     <ClInclude Include="decl.h" />
-    <ClInclude Include="expr.h" />
-    <ClInclude Include="func.h" />
+    <ClInclude Include="expr.h" />
+    <ClInclude Include="func.h" />
     <ClInclude Include="ispc.h" />
     <ClInclude Include="llvmutil.h" />
     <ClInclude Include="module.h" />
@@ -76,32 +82,32 @@
       <Message Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">Building gen-stdlib.cpp</Message>
     </CustomBuild>
   </ItemGroup>
-  <ItemGroup>
-    <CustomBuild Include="builtins-sse4.ll">
-      <FileType>Document</FileType>
-      <Command Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">m4 builtins.m4 builtins-sse4.ll | python bitcode2cpp.py builtins-sse4.ll &gt; gen-bitcode-sse4.cpp</Command>
-      <Outputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">gen-bitcode-sse4.cpp</Outputs>
-      <AdditionalInputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">builtins.m4;builtins-sse.ll</AdditionalInputs>
-      <Command Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">m4 builtins.m4 builtins-sse4.ll | python bitcode2cpp.py builtins-sse4.ll &gt; gen-bitcode-sse4.cpp</Command>
-      <Outputs Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">gen-bitcode-sse4.cpp</Outputs>
-      <AdditionalInputs Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">builtins.m4;builtins-sse.ll</AdditionalInputs>
-      <Message Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Building gen-bitcode-sse4.cpp</Message>
-      <Message Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">Building gen-bitcode-sse4.cpp</Message>
-    </CustomBuild>
-  </ItemGroup>
-  <ItemGroup>
-    <CustomBuild Include="builtins-dispatch.ll">
-      <FileType>Document</FileType>
-      <Command Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">m4 builtins.m4 builtins-dispatch.ll | python bitcode2cpp.py builtins-dispatch.ll &gt; gen-bitcode-dispatch.cpp</Command>
-      <Outputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">gen-bitcode-dispatch.cpp</Outputs>
-      <AdditionalInputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">builtins.m4</AdditionalInputs>
-      <Command Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">m4 builtins.m4 builtins-dispatch.ll | python bitcode2cpp.py builtins-dispatch.ll &gt; gen-bitcode-dispatch.cpp</Command>
-      <Outputs Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">gen-bitcode-dispatch.cpp</Outputs>
-      <AdditionalInputs Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">builtins.m4</AdditionalInputs>
-      <Message Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Building gen-bitcode-dispatch.cpp</Message>
-      <Message Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">Building gen-bitcode-dispatch.cpp</Message>
-    </CustomBuild>
-  </ItemGroup>
+  <ItemGroup>
+    <CustomBuild Include="builtins-sse4.ll">
+      <FileType>Document</FileType>
+      <Command Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">m4 builtins.m4 builtins-sse4.ll | python bitcode2cpp.py builtins-sse4.ll &gt; gen-bitcode-sse4.cpp</Command>
+      <Outputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">gen-bitcode-sse4.cpp</Outputs>
+      <AdditionalInputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">builtins.m4;builtins-sse.ll</AdditionalInputs>
+      <Command Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">m4 builtins.m4 builtins-sse4.ll | python bitcode2cpp.py builtins-sse4.ll &gt; gen-bitcode-sse4.cpp</Command>
+      <Outputs Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">gen-bitcode-sse4.cpp</Outputs>
+      <AdditionalInputs Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">builtins.m4;builtins-sse.ll</AdditionalInputs>
+      <Message Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Building gen-bitcode-sse4.cpp</Message>
+      <Message Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">Building gen-bitcode-sse4.cpp</Message>
+    </CustomBuild>
+  </ItemGroup>
+  <ItemGroup>
+    <CustomBuild Include="builtins-dispatch.ll">
+      <FileType>Document</FileType>
+      <Command Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">m4 builtins.m4 builtins-dispatch.ll | python bitcode2cpp.py builtins-dispatch.ll &gt; gen-bitcode-dispatch.cpp</Command>
+      <Outputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">gen-bitcode-dispatch.cpp</Outputs>
+      <AdditionalInputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">builtins.m4</AdditionalInputs>
+      <Command Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">m4 builtins.m4 builtins-dispatch.ll | python bitcode2cpp.py builtins-dispatch.ll &gt; gen-bitcode-dispatch.cpp</Command>
+      <Outputs Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">gen-bitcode-dispatch.cpp</Outputs>
+      <AdditionalInputs Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">builtins.m4</AdditionalInputs>
+      <Message Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Building gen-bitcode-dispatch.cpp</Message>
+      <Message Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">Building gen-bitcode-dispatch.cpp</Message>
+    </CustomBuild>
+  </ItemGroup>
   <ItemGroup>
     <CustomBuild Include="builtins-sse4-x2.ll">
       <FileType>Document</FileType>
@@ -248,4 +254,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>
diff --git a/ispc_test.cpp b/ispc_test.cpp
index a1a6d3d3..385e7dc2 100644
--- a/ispc_test.cpp
+++ b/ispc_test.cpp
@@ -120,7 +120,7 @@ void *ISPCAlloc(void **handle, int64_t size, int32_t alignment) {
     *handle = (void *)0xdeadbeef;
     // leak time!
 #ifdef ISPC_IS_WINDOWS
-    return _aligned_malloc(size, alignment);
+    return _aligned_malloc((size_t)size, alignment);
 #endif
 #ifdef ISPC_IS_LINUX
     return memalign(alignment, size);
diff --git a/ispc_test.vcxproj b/ispc_test.vcxproj
index e36275b8..1dd885bb 100755
--- a/ispc_test.vcxproj
+++ b/ispc_test.vcxproj
@@ -54,6 +54,7 @@
       <Optimization>Disabled</Optimization>
       <PreprocessorDefinitions>LLVM_3_0;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>$(LLVM_INSTALL_DIR)/include</AdditionalIncludeDirectories>
+      <DisableSpecificWarnings>4146;4355;4800</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -72,6 +73,7 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <PreprocessorDefinitions>LLVM_3_0;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>$(LLVM_INSTALL_DIR)/include</AdditionalIncludeDirectories>
+      <DisableSpecificWarnings>4146;4355;4800</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
diff --git a/simple.vcxproj b/simple.vcxproj
new file mode 100755
index 00000000..56e9074a
--- /dev/null
+++ b/simple.vcxproj
@@ -0,0 +1,164 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="morph.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <CustomBuild Include="morph.vo">
+      <FileType>Document</FileType>
+      <Command Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+cl /E /TP %(Filename).vo | volta -O2 - -o %(Filename).obj -h %(Filename).h --arch=x86
+</Command>
+      <Command Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+cl /E /TP %(Filename).vo | volta -O2 -o %(Filename).obj -h %(Filename).h
+</Command>
+      <Outputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">%(Filename).obj</Outputs>
+      <Outputs Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">%(Filename).obj</Outputs>
+      <Command Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+cl /E /TP %(Filename).vo | volta -O2 - -o %(Filename).obj -h %(Filename).h --arch=x86
+</Command>
+      <Command Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+cl /E /TP %(Filename).vo | volta -O2 - -o %(Filename).obj -h %(Filename).h
+</Command>
+      <Outputs Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">%(Filename).obj</Outputs>
+      <Outputs Condition="'$(Configuration)|$(Platform)'=='Release|x64'">%(Filename).obj</Outputs>
+    </CustomBuild>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{947C5311-8B78-4D05-BEE4-BCF342D4B367}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+    <RootNamespace>morph</RootNamespace>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>