anchor.diff:  cd build64
   set CC=..\build64_stage0\bin\clang-cl
   set CXX=..\build64_stage0\bin\clang-cl
  -cmake -GNinja %cmake_flags% -DPYTHON_HOME=%python64_dir% ..\llvm || exit /b
  +cmake -GNinja %cmake_flags% ..\llvm || exit /b
   ninja all || exit /b
   ninja check || ninja check || ninja check || exit /b
   ninja check-clang || ninja check-clang || ninja check-clang ||  exit /b
  
positive.code: 
  REM Prerequisites:
  REM
  REM   Visual Studio 2017, CMake, Ninja, SVN, GNUWin32, SWIG, Python 3,
  REM   NSIS with the strlen_8192 patch,
  REM   Visual Studio 2017 SDK and Nuget (for the clang-format plugin),
  REM   Perl (for the OpenMP run-time).
  REM
  REM
  REM   For LLDB, SWIG version <= 3.0.8 needs to be used to work around
  REM   https://github.com/swig/swig/issues/769
  
  
  REM You need to modify the paths below:
  set vsdevcmd=C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\Common7\Tools\VsDevCmd.bat
  
  set python32_dir=C:\Users\%USERNAME%\AppData\Local\Programs\Python\Python36-32
  set python64_dir=C:\Users\%USERNAME%\AppData\Local\Programs\Python\Python36
  
  set revision=%1
  set branch=trunk
  
negative.code: mkdir build64_stage0
  cd build64_stage0
  REM Work around VS2017 bug by using MinSizeRel.
  cmake -GNinja %cmake_flags% -DCMAKE_BUILD_TYPE=MinSizeRel ..\llvm || exit /b
  ninja all || exit /b
  ninja check || ninja check || ninja check || exit /b
  ninja check-clang || ninja check-clang || ninja check-clang ||  exit /b
  