# try to detect 'include' dir
      push @i, catfile($dirpath,'include');
      push @i, catfile($dirpath,'include','ImageMagick');
      push @i, catfile($dirpath,'..','include');
      push @i, catfile($dirpath,'..','include','ImageMagick');
      push @i, catfile($dirpath,'..','..','include');
      push @i, catfile($dirpath,'..','..','include','ImageMagick');
      push @i, catfile($dirpath,'..','..','..','include');
      push @i, catfile($dirpath,'..','..','..','include','ImageMagick');
      push @i, catfile($dirpath,'..','..','include','ImageMagick');
      push @i, catfile($dirpath,'..','..','..','include');
      push @i, catfile($dirpath,'..','..','..','include','ImageMagick');

      foreach (@i) { push @incdir, $_ if (-e "$_/MagickCore/MagickCore.h") };