$ file libxml2.a
libxml2.a: archive (big format)
$ ar -X32 -tv libxml2.a
$ ar -X64 -tv libxml2.a
rwxrwxrwx   203/200   2822289 May 12 13:23 2012 libxml2.so.2
$

##</code><code>##

$ perl -MV=XML::LibXML
XML::LibXML
        /pro/lib/perl5/site_perl/5.14.2/aix-64all/XML/LibXML.pm: 2.0103
$ ldd /pro/lib/perl5/site_perl/5.14.2/aix-64all/auto/XML/LibXML/LibXML.so
/pro/lib/perl5/site_perl/5.14.2/aix-64all/auto/XML/LibXML/LibXML.so needs:
         /usr/lib/libc.a(shr_64.o)
         /pro/local/lib/libxml2.a(libxml2.so.2)
         /unix
         /usr/lib/libcrypt.a(shr_64.o)
         /usr/lib/libiconv.a(shr4_64.o)
         /usr/lib/libpthread.a(shr_xpg5_64.o)
$