anchor.diff:  
   @if %pythonver%==2 set buildcmd=%pythonloc% %pythonloc:~0,-10%Scripts\scons.py build=release platform=windows machine=%longabi% texture_float=1
   @if %pythonver% GEQ 3 set buildconf=%mesonloc% . .\build\windows-%longabi% --backend=vs2017 --buildtype=release
  +@if %pythonver% GEQ 3 set buildcmd=ninja -C build\windows-%longabi%
   @IF %pythonver% GEQ 3 IF %pkgconfigstate%==1 SET PATH=%mesa%\pkgconfig\;%PATH%
   
   @rem Hardcode this until simultaneous dual python support is implemented.
  
positive.code: @if /I NOT "%llvmless%"=="y" if %abi%==x64 if EXIST %LLVM% set /p swrdrv=Do you want to build swr drivers? (y=yes):
  @if /I NOT "%llvmless%"=="y" if %abi%==x64 if EXIST %LLVM% echo.
  @if %pythonver%==2 if /I "%swrdrv%"=="y" set buildcmd=%buildcmd% swr=1
  @if %pythonver% GEQ 3 if /I "%swrdrv%"=="y" set buildconf=%buildconf% -Dgallium-drivers=auto,swr -Dswr-arches=avx,avx2,knl,skx
  
  @set /p gles=Do you want to build GLAPI shared library and GLES support (y/n):
  @echo.
  
negative.code: @if /I "%ninja%"=="y" set buildconf=%buildconf:vs2017=ninja%
  
  @set llvmless=n
  if %pythonver% GEQ 3 set llvmless=y
  @if %pythonver%==2 if EXIST %LLVM% set /p llvmless=Build Mesa without LLVM (y/n). llvmpipe and swr drivers and high performance JIT won't be available for other drivers and libraries:
  @if %pythonver%==2 if EXIST %LLVM% echo.
  @if %pythonver%==2 if NOT EXIST %LLVM% set /p llvmless=Build Mesa without LLVM (y=yes/q=quit). llvmpipe and swr drivers and high performance JIT won't be available for other drivers and libraries:
  @if %pythonver%==2 if NOT EXIST %LLVM% echo.
  @if %pythonver%==2 if /I "%llvmless%"=="y" set buildcmd=%buildcmd% llvm=no
  @if %pythonver% GEQ 3 if /I "%llvmless%"=="y" set buildconf=%buildconf% -Dllvm=false
  @if /I NOT "%llvmless%"=="y" if NOT EXIST %LLVM% echo User refused to build Mesa without LLVM.
  