make test failing on Berkeley DB 4.5/perl 5.8 (and 5.6) on BSD6/AMD64

On Make:

BerkeleyDB.xs: In function `XS_BerkeleyDB__Txn__DESTROY':
BerkeleyDB.xs:4067: warning: cast from pointer to integer of different
size

On Make test example:

t/btree........Can't load
'/BerkeleyDB/db-4.5.20/perl/BerkeleyDB/blib/arch/auto/Berkel eyDB/BerkeleyDB.so'
for module BerkeleyDB:
BerkeleyDB/db-4.5.20/perl/BerkeleyDB/blib/arch/auto/Berkeley DB/BerkeleyDB.so:
unsupported file layout at
lib/perl5/5.8.5/i386-freebsd-thread-multi/DynaLoader.pm line 230.
at t/btree.t line 6
Compilation failed in require at t/btree.t line 6.


It works OK on Perl 5.005 on BSD4 / 32 bit Intel box

Any suggestions appreciated.