anchor.diff:     cd  %SPIRV_TOOLS_DIR%
   
      REM Cleanup any old directories lying around.
  -   if exist build32 (
  -      rmdir /s /q build32
  -   )
  -   if exist build (
  -      rmdir /s /q build
  +   if not exist build32 (
  +       mkdir build32
  +   )
  +   if not exist build (
  +      mkdir build
      )
   
      echo Making 32-bit spirv-tools
      echo *************************
  -   mkdir build32
      set SPIRV_TOOLS_BUILD_DIR=%SPIRV_TOOLS_DIR%\build32
   
      cd %SPIRV_TOOLS_BUILD_DIR%
  
positive.code: echo Creating and/or updating glslang, spirv-tools in %BASE_DIR%
  
  if %sync-glslang% equ 1 (
     if exist %GLSLANG_DIR% (
        rd /S /Q %GLSLANG_DIR%
     )
     if not exist %GLSLANG_DIR% (
        call:create_glslang
     )
  
negative.code:  
     echo Making 64-bit glslang
     echo *************************
     set GLSLANG_BUILD_DIR=%GLSLANG_DIR%\build
     cd %GLSLANG_BUILD_DIR%
  
  