anchor.diff:  
   
   
  +
  +
  +rem ===========================================================================
  +rem   create remove_file_silent.bat script
  +rem ===========================================================================
  +
  +set out=%tmp%\remove_file_silent.bat
  +echo @echo off                                                      >  %out%
  +echo rem usage: path                                                >> %out%
  +echo if exist %%1 del %%1 ^> nul                                    >> %out%
  +echo if not %%ERRORLEVEL%%==0 echo ERROR: removing %%1 failed       >> %out%
  +
  +
  +
  +
  +
  +
   rem ===========================================================================
   rem   download and unpack 7zip using msiexec
   rem ===========================================================================
  
negative.code: echo w32api-3.14-mingw32-dev.tar           >> %out%
  echo gdb-7.1-2-mingw32-bin.tar             >> %out%
  echo binutils-2.20-1-mingw32-bin.tar       >> %out%
  echo libbz2-1.0.5-2-mingw32-dll-2.tar      >> %out%
  echo bzip2-1.0.5-2-mingw32-bin.tar         >> %out%
  
  
  
  set A=for /F %%F in (%tmp%\mingw_gz_packages.txt) do
  