anchor.diff:  
   	echo Updating projects ...
   	if EXIST .\bin\ninja.exe start /B /wait .\bin\upn.exe .\bin\ .\libs\webrtc\ .\libs\webrtc\chromium\src\
  -)
  -
  -where perl > NUL 2>&1
  -if %errorlevel% equ 1 (
  -	echo.
  -	echo ================================================================================
  -	echo.
  -	echo Warning! Warning! Warning! Warning! Warning! Warning! Warning!
  -	echo.
  -	echo Perl is missing.
  -	echo You need to have installed Perl to build projects properly.
  -	echo Use the 32-bit perl from Strawberry http://strawberryperl.com/ to avoid possible linking errors and incorrect assember files generation. 
  -	echo Download URL: http://strawberryperl.com/download/5.22.0.1/strawberry-perl-5.22.0.1-32bit.msi
  -	echo Make sure that the perl path from Strawberry appears at the beginning of all other perl paths in the PATH 
  -	echo.
  -	echo ================================================================================
  -	echo.
   )
   
   goto:done
  
positive.code: popd > NUL
  if "%failure%" neq "0" goto:eof
  
  
  goto:eof
  
  
  :failure
  echo.
  echo ERROR: %~2
  echo.
  echo FAILURE: Could not prepare ortc-lib-sdk.
  
  
negative.code: 
  if EXIST ..\bin\nul call:failure -1 "Do not run scripts from bin directory!"
  if "%failure%" neq "0" goto:eof
  
  where perl > NUL 2>&1
  if %errorlevel% equ 1 (
  	echo.
  	echo ================================================================================
  	echo.
  	echo Warning! Warning! Warning! Warning! Warning! Warning! Warning!
  	echo.
  	echo Perl is missing.
  	echo You need to have installed Perl to build projects properly.
  	echo Use the 32-bit perl from Strawberry http://strawberryperl.com/ to avoid possible linking errors and incorrect assember files generation. 
  	echo Download URL: http://strawberryperl.com/download/5.22.1.2/strawberry-perl-5.22.1.2-32bit.msi
  	echo Make sure that the perl path from Strawberry appears at the beginning of all other perl paths in the PATH 
  	echo.
  	echo ================================================================================
  	echo.
  	
  	call:failure -1 "Perl has to be installed before running prepare script!"
  	if "%failure%" neq "0" goto:eof
  )
  
  call:doprepare libs\webrtc ..\..\bin\prepare-webrtc.bat WebRTC winrt
  if "%failure%" neq "0" goto:eof
  