anchor.diff:  exit
   
   :includedirset
  -if exist %INCLUDEDIR%\*.* goto includedirexists
  +if exist "%INCLUDEDIR%\*.*" goto includedirexists
   echo The INCLUDEDIR environment variable must point to an existing directory
   echo to be able to perform the installation procedure.
   exit
  
positive.code: if "%headersdir%"=="" goto skipheaders
  if "%headersname%"=="" goto skipheaders
  
  xcopy /S /I /Y %headersdir% %INCLUDEDIR%\%headersname%
  
  :skipheaders
  
  if "%libs%"=="" goto skiplibs
  xcopy /S /I /Y %libs% %LIBDIR%
  
  :skiplibs
  
  if "%bins%"=="" goto skipbins
  xcopy /S /I /Y %bins% %BINDIR%
  
  :skipbins
  
  
negative.code: exit
  
  :libdirset
  if exist "%LIBDIR%\*.*" goto libdirexists
  echo The LIBDIR environment variable must point to an existing directory
  echo to be able to perform the installation procedure.
  exit
  