anchor.diff:  SET TESTDIR=%PROJECT_ROOT%\config.tests
   SET CONFIG_LOG=config.log
   SET LAST_FUNC_RET=0
  +SET WINNT=0
   
   if exist %PROJECT_ROOT%\config.in   del %PROJECT_ROOT%\config.in
   if exist %PROJECT_ROOT%\config.log  del %PROJECT_ROOT%\config.log
  
positive.code: :testnmake
  if "%QMAKESPEC%" == "win32-g++"     goto testgmake
  echo    Testing for nmake...
  nmake /? >> %PROJECT_ROOT%\%CONFIG_LOG%
  if errorlevel 1 goto testgmake
  echo        Using nmake.
  SET MAKE=nmake
  
negative.code: 
  :testmingw
  echo    Testing for mingw32-make...
  if "%WINNT%"=="1" call mingw32-make -v >> %PROJECT_ROOT%\%CONFIG_LOG% 2>&1
  if "%WINNT%"=="0" call mingw32-make -v >> %PROJECT_ROOT%\%CONFIG_LOG%
  if errorlevel 1 goto testnmake
  echo        Using mingw32-make. 
  SET MAKE=mingw32-make
  