It works for me on linux but I think your compiler may be choking on an extended line in RawIP.xs:

       sv_catpvn(ip_opts,SvPV(*av_fetch(opts,i+2,0),l),
                         SvCUR(*av_fetch(opts,i+2,0)));
       break;
       default:
       }  /* reported error line 444 */

       sv_catpvn(ip_opts,SvPV(*av_fetch(opts,i+2,0),l),
                         SvCUR(*av_fetch(opts,i+2,0)));
       break;
       default:
       }  /* reported error line 543 */
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Basically the code before the first two errors (which will be fatal unlike the warnings) is just a loop with a switch statement in it. I have a feeling that your compiler does not like the sv_catpvn(...) being on two lines without a \ line continuation. Try changing it to:

sv_catpvn(ip_opts,SvPV(*av_fetch(opts,i+2,0),l),SvCUR(*av_fetch(opts,i
++2,0)));

# or

sv_catpvn(ip_opts,SvPV(*av_fetch(opts,i+2,0),l), \
                  SvCUR(*av_fetch(opts,i+2,0)));
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