Change ToolsVersion to 4.0 for VS2010

builds/msvc/vs2010/inproc_lat/inproc_lat.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <PropertyGroup>
     <_ProjectFileVersion>10.0.40219.1</_ProjectFileVersion>

builds/msvc/vs2010/inproc_thr/inproc_thr.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <PropertyGroup>
     <_ProjectFileVersion>10.0.40219.1</_ProjectFileVersion>

builds/msvc/vs2010/libsodium.import.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <PropertyGroup Label="Globals">
     <_ProjectFileVersion>10.0.40219.1</_ProjectFileVersion>

builds/msvc/vs2010/libzmq.import.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <PropertyGroup Label="Globals">
     <_ProjectFileVersion>10.0.40219.1</_ProjectFileVersion>

builds/msvc/vs2010/libzmq/libzmq.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <PropertyGroup>
     <_ProjectFileVersion>10.0.40219.1</_ProjectFileVersion>

builds/msvc/vs2010/libzmq/libzmq.vcxproj

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup Label="Globals">
     <ProjectGuid>{641C5F36-32EE-4323-B740-992B651CF9D6}</ProjectGuid>
     <ProjectName>libzmq</ProjectName>

builds/msvc/vs2010/libzmq/libzmq.vcxproj.filters

 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup>
     <ClCompile Include="..\..\..\..\src\address.cpp">
       <Filter>src</Filter>

builds/msvc/vs2010/local_lat/local_lat.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <PropertyGroup>
     <_ProjectFileVersion>10.0.40219.1</_ProjectFileVersion>

builds/msvc/vs2010/local_thr/local_thr.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <PropertyGroup>
     <_ProjectFileVersion>10.0.40219.1</_ProjectFileVersion>

builds/msvc/vs2010/properties/Common.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   
   <PropertyGroup>
     <_ProjectFileVersion>10.0.40219.1</_ProjectFileVersion>

builds/msvc/vs2010/properties/Console.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   
   <ImportGroup Label="PropertySheets">
     <Import Project="Common.props" />

builds/msvc/vs2010/properties/ConsoleDebugDynamic.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <ImportGroup Label="PropertySheets">
     <Import Project="Console.props" />

builds/msvc/vs2010/properties/ConsoleDebugLinkTimeCodeGeneration.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <ImportGroup Label="PropertySheets">
     <Import Project="Console.props" />

builds/msvc/vs2010/properties/ConsoleDebugStatic.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <ImportGroup Label="PropertySheets">
     <Import Project="Console.props" />

builds/msvc/vs2010/properties/ConsoleReleaseDynamic.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <ImportGroup Label="PropertySheets">
     <Import Project="Console.props" />

builds/msvc/vs2010/properties/ConsoleReleaseLinkTimeCodeGeneration.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <ImportGroup Label="PropertySheets">
     <Import Project="Console.props" />

builds/msvc/vs2010/properties/ConsoleReleaseStatic.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <ImportGroup Label="PropertySheets">
     <Import Project="Console.props" />

builds/msvc/vs2010/properties/Debug.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   
   <PropertyGroup>
     <_ProjectFileVersion>10.0.40219.1</_ProjectFileVersion>

builds/msvc/vs2010/properties/Dynamic.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   
   <ImportGroup Label="PropertySheets">
     <Import Project="Common.props" />

builds/msvc/vs2010/properties/DynamicDebug.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <ImportGroup Label="PropertySheets">
     <Import Project="Dynamic.props" />

builds/msvc/vs2010/properties/DynamicRelease.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <ImportGroup Label="PropertySheets">
     <Import Project="Dynamic.props" />

builds/msvc/vs2010/properties/LinkTimeCodeGeneration.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
    
   <PropertyGroup>
     <_ProjectFileVersion>10.0.40219.1</_ProjectFileVersion>

builds/msvc/vs2010/properties/Release.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   
   <PropertyGroup>
     <_ProjectFileVersion>10.0.40219.1</_ProjectFileVersion>

builds/msvc/vs2010/properties/Static.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   
   <ImportGroup Label="PropertySheets">
     <Import Project="Common.props" />

builds/msvc/vs2010/properties/StaticDebug.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   
   <ImportGroup Label="PropertySheets">
     <Import Project="Static.props" />

builds/msvc/vs2010/properties/StaticDebugLinkTimeCodeGeneration.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   
   <ImportGroup Label="PropertySheets">
     <Import Project="Debug.props" />

builds/msvc/vs2010/properties/StaticLinkTimeCodeGeneration.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   
   <ImportGroup Label="PropertySheets">
     <Import Project="Static.props" />

builds/msvc/vs2010/properties/StaticRelease.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   
   <ImportGroup Label="PropertySheets">
     <Import Project="Static.props" />

builds/msvc/vs2010/properties/StaticReleaseLinkTimeCodeGeneration.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   
   <ImportGroup Label="PropertySheets">
     <Import Project="Release.props" />

builds/msvc/vs2010/properties/Win32.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   
   <PropertyGroup>
     <_ProjectFileVersion>10.0.40219.1</_ProjectFileVersion>

builds/msvc/vs2010/properties/x64.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   
   <PropertyGroup>
     <_ProjectFileVersion>10.0.40219.1</_ProjectFileVersion>

builds/msvc/vs2010/remote_lat/remote_lat.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <PropertyGroup>
     <_ProjectFileVersion>10.0.40219.1</_ProjectFileVersion>

builds/msvc/vs2010/remote_thr/remote_thr.props

 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <PropertyGroup>
     <_ProjectFileVersion>10.0.40219.1</_ProjectFileVersion>