It seems your Perl was compiled using (Sun's) cc and not gcc. As a rule of thumb, you will need the same compiler that your Perl was compiled with to compile extensions for your Perl with. If you only have gcc and not Sun's compiler, you can maybe get a Perl compiled with gcc from http://sunfreeware.com. On the third hand, Solaris 10 now has Perl 5.8.4 as the stock Perl, so maybe you should upgrade to a newer operating system?