spec file, with multiple architectures

["Richard Shade" <rshade rightscale com>]

I want to use one spec file for multiple architectures. However there is the following line in my spec file: 
on i386
%attr(0644,root,root) %{_libdir}/perl5/5.8.8/i386-linux-thread-multi/perllocal.pod
on x86_64
%attr(0644,root,root) %{_libdir}/perl5/5.8.8/x86_64-linux-thread-multi/perllocal.pod

is there a way to make this architecture independent like: 
%attr(0644,root,root) %{_libdir}/perl5/5.8.8/%{_architecture}-linux-thread-multi/perllocal.pod



-- 
Thanks, 

Richard Shade
RightScale
http://www.rightscale.com/