You can "Configure -Dusemorebits" to turn on both the 64-bit support
and the long double support.
-Note that on some platforms the gcc 3.1 compiler has been reported
-to refuse to compile the Time::Hires module when using -Dusemorebits
-or an equivalent setting.
-
=head2 Selecting File IO mechanisms
Executive summary: in Perl 5.8, you should use the default "PerlIO"