=over

=item ${^WIDE_SYSTEM_CALLS}

Global flag that enables system calls made by Perl to use wide character
APIs native to the system, if available.  This is currently only implemented
on the Windows platform.

This can also be enabled from the command line using the C<-C> switch.

The initial value is typically C<0> for compatibility with Perl versions
earlier than 5.6, but may be automatically set to C<1> by Perl if the system
provides a user-settable default (e.g., C<$ENV{LC_CTYPE}>).

The C<bytes> pragma always overrides the effect of this flag in the current
lexical scope.  See L<bytes>.

=back