How to build universal binary XS CPAN modules:

1. Extract module
2. Create a new file: hints/darwin.pl:

#!/usr/bin/perl

$arch = "-arch i386 -arch ppc";
print "Adding $archn";

$self->{CCFLAGS} = "$arch $Config{ccflags}";
$self->{LDFLAGS} = "$arch $Config{ldflags}";
$self->{LDDLFLAGS} = "$arch $Config{lddlflags}";

3. perl Makefile.PL; make; make test
4. The module's bundle file is now a universal binary.