anchor.diff:  @set vsenvloaded=0
   @set dxtnbuilt=0
   @set toolset=14
  -@set /p toolset=<toolset.ini
  -@echo.
  +@if EXIST toolset.ini set /p toolset=<toolset.ini
   @set vsenv=%vsenv14%
   @if %toolset%==15 @set vsenv=%vsenv15%
   
  
positive.code: @set PATH=%gcc%\;%PATH%
  @cd "%mesa%dxtn"
  @echo.
  @RD /S /Q %abi%
  @echo.
  @MD %abi%
  @set dxtn=gcc -shared
  @if %abi%==x86 set dxtn=%dxtn% -m32
  
negative.code: 
  
  :build_with_vs
  @if EXIST build\windows-%longabi% RD /S /Q build\windows-%longabi%
  @set PATH=%mesa%Python\%abi%\;%mesa%Python\%abi%\Scripts\;%mesa%flexbison\;%mesa%m4\%abi%\usr\bin\;%PATH%
  @pip install -U mako
  @pip freeze > requirements.txt
  