anchor.diff:  @msbuild /p:Configuration=Release INSTALL.vcxproj
   @pause
   
  -:Next
  -@set /p buildmesa=Begin mesa build. Proceed y/n? 
  -@if /i %buildmesa%==y GOTO build_mesa
  -@if /i NOT %buildmesa%==y @exit
  +:build_dxtn
  +@if NOT EXIST "%gcc%" GOTO build_mesa
  +@set /p builddxtn=Do you want to build S3 texture compression library? (y/n):
  +@if /i NOT %builddxtn%==y GOTO build_mesa
  +@cd %mesa%dxtn
  +@RD /S /Q %abi%
  +@MD %abi%
  +@set dxtn=gcc -shared
  +@if %abi%==x86 set dxtn=%dxtn% -m32
  +@set dxtn=%dxtn% -v txc_dxtn.h txc_compress_dxtn.c txc_fetch_dxtn.c -I ..\mesa\include  -Wl,--dll,--dynamicbase,--enable-auto-image-base,--nxcompat -o %abi%\dxtn.dll
  +@echo.
  +@%dxtn%
  +@echo.
   
   :build_mesa
  +@set /p buildmesa=Begin mesa build. Proceed (y/n):
  +@if /i NOT %buildmesa%==y GOTO exit
   @set LLVM=%mesaunix%llvm/%abi%
   @cd %mesa%mesa
  +@set mingw=n
  +@rem if EXIST "%gcc%" set /p mingw=Do you want to build with MinGW-W64 instead of Visual Studio? (y=yes):
  +@set buildmingw=
  +@if /i %mingw%==y @set buildmingw=toolchain=crossmingw
   @set /p openswr=Do you want to build OpenSWR drivers? (y=yes):
   @set buildswr=
   @if /i %openswr%==y @set buildswr=swr=1
  -@cmd /k "scons build=release platform=windows machine=%longabi% %buildswr% libgl-gdi"+@cmd /k "scons build=release platform=windows machine=%longabi% %buildmingw% %buildswr% libgl-gdi"
  +
  +:exit
  +exit
positive.code: @if /I %x64%==y @set abi=x64
  @set longabi=%abi%
  @if %abi%==x64 @set longabi=x86_64
  @set toolchain=Visual Studio %vsver%
  @if %abi%==x64 @set toolchain=%toolchain% Win64
  @set caller="%vstudio%
  @if %abi%==x86 set caller=%caller%\vcvars32.bat"
  @if %abi%==x64 set caller=%caller%\amd64\vcvars64.bat"
  @call %caller%
  @set PATH=%mesa%flexbison\;%mesa%m4\%abi%\bin\;%mesa%Python\%abi%\;%mesa%Python\%abi%\Scripts\;%mesa%cmake\%abi%\bin\;%PATH%
  
  @pip install -U mako
  @pip freeze > requirements.txt
  
negative.code: @del requirements.txt
  
  @set /p buildllvm=Begin LLVM build. Only needs to run once for each ABI and version. Proceed y/n? 
  @if /I NOT %buildllvm%==y GOTO build_dxtn
  
  :build_llvm
  @cd %mesa%llvm
  