anchor.diff:  goto got_paths
   
   
  -:: don't have VS90COMNTOOLS defined, so we will have to assume default
  +:: don't have VS110COMNTOOLS defined, so we will have to assume default
   :: installation paths for compiler
   ::
   :use_default_paths
   :: Set default paths for Visual C++, the Platform SDKs, and Perl
  -set VS_DIR=%PROGRAMS_DIR%\Microsoft Visual Studio 9.0
  +set VS_DIR=%PROGRAMS_DIR%\Microsoft Visual Studio 11.0
   set VC_DIR=%VS_DIR%\VC
   set VC_BIN=%VC_DIR%\bin
   set PERL_BIN_DIR=%SystemDrive%\Perl\bin
  
positive.code: set PROGRAMS_DIR=%ProgramFiles%
  if not "~%ProgramFiles(x86)%"=="~" set PROGRAMS_DIR=%SystemDrive%\PROGRA~2
  
  :: If Visual Studio 2008 is installed, then VS90COMNTOOLS should be defined
  :: we can use that to setup the compiler environment. if it's not set
  :: then all we can do is choose default values for environment variables.
  ::
  if "~%VS90COMNTOOLS%"=="~" goto use_default_paths
  
  :: derive from VS90COMNTOOLS
  ::
  for /D %%I in ("%VS90COMNTOOLS%..") do set VS90ROOT=%%~sdpI
  set VS_DIR=%VS90ROOT:~0,-1%
  set VC_DIR=%VS_DIR%\VC
  set VC_BIN=%VC_DIR%\bin
  set DBG_TOOLS_DIR=%ProgramFiles%\Debugging Tools for Windows (x86);%ProgramFiles%\Debugging Tools for Windows (x64)
  
negative.code: REM   or this batch file must be run from that directory
  REM
  REM   the location of the MS C compiler is derived from the
  REM   VS110COMNTOOLS environment variable. (which is set in all
  REM   user's environments by the default compiler install.)
  REM
  REM
  