anchor.diff:  SET D="%ProgramFiles(x86)%\MSBuild\Microsoft.Cpp\v4.0\V120\Platforms\%PLATFORM%\PlatformToolsets"
   IF EXIST %D% GOTO FOUND_V120
   
  -:END
  +:LOOPEND
   IF %SUCCESS% == 1 goto DONE
   echo Failed to find MSBuild toolsets directory.
   goto FAILED
  
positive.code: 
  set PLATFORM=None
  :START
  IF %PLATFORM% == x64 GOTO END
  IF %PLATFORM% == Win32 SET PLATFORM=x64
  IF %PLATFORM% == None SET PLATFORM=Win32
  
  
negative.code: IF NOT %ERRORLEVEL% == 0 GOTO FAILED
  copy %PLATFORM%\toolset-vs2013_xp.targets %D%\LLVM-vs2013_xp\toolset.targets
  IF NOT %ERRORLEVEL% == 0 GOTO FAILED
  set SUCCESS=1
  GOTO START
  
  
  