anchor.diff:  echo:
   echo  *** ABORTING: CHECK ERROR MESSAGES ABOVE ***
   
  -REM LeaveBatchError 
  +REM LeaveBatchError
   set VarRevisionBuild=
   cd /d %OLDDIR%
   exit/b 1
  
positive.code: @echo off 
  set OLDDIR=%CD%
  cd /d %~dp0
  REM ============================================
  
negative.code: if not exist include/gpac/revision.h goto Abort
  
  REM check if found a local commit which has not been pushed
  for /f "delims=" %%a in ('git diff FETCH_HEAD') do @set diff=%%a
  echo diff = %diff%
  if not "%diff%"=="" goto RevisionAbort
  
  REM execute git and check if the result if found within revision.h
  for /f "delims=" %%a in ('git describe --tags --long') do @set VERSION=%%a
  