perl-core/Math-BigInt-0.81 (now -r1) has a new set of PDEPENDS (basically, by installing this core module, you really need to then upgrade the other two core modules that work with it). I've had to drop your keywords until perl-core/bignum and perl-core/Math-BigRat can be keyworded by your arch's. Thanks!
~ia64 done
~ppc keywords added
Marked ~hppa.
Mips done.
~alpha done