anchor.diff:  set CC=..\build64_stage0\bin\clang-cl
   set CXX=..\build64_stage0\bin\clang-cl
   cmake -GNinja %cmake_flags% ..\llvm || exit /b
  -ninja all || exit /b
  +ninja all || ninja all || ninja all || exit /b
   ninja check || ninja check || ninja check || exit /b
   ninja check-clang || ninja check-clang || ninja check-clang ||  exit /b
   ninja package || exit /b
  
positive.code: cd build32_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
  cd..
  
negative.code: cd build64_stage0
  REM Work around VS2017 bug by using MinSizeRel.
  cmake -GNinja %cmake_flags% -DCMAKE_BUILD_TYPE=MinSizeRel ..\llvm || exit /b
  ninja all || ninja all || ninja all || exit /b
  ninja check || ninja check || ninja check || exit /b
  ninja check-clang || ninja check-clang || ninja check-clang ||  exit /b
  cd..
  