=item Win95/NT
-The Win95/NT installation, when using the Activeware port of Perl,
+The Win95/NT installation, when using the ActiveState installer for Perl,
will modify the Registry to associate the F<.pl> extension with the perl
-interpreter. If you install another port of Perl, including the one
-in the Win32 directory of the Perl distribution, then you'll have to
-modify the Registry yourself. Note that this means you can no
-longer tell the difference between an executable Perl program
-and a Perl library file.
+interpreter. If you install Perl by other means (including building from
+the sources), you may have to modify the Registry yourself. Note that
+this means you can no longer tell the difference between an executable
+Perl program and a Perl library file.
=item Macintosh
runs the program under the Perl debugger. See L<perldebug>.
-=item B<-d:>I<foo>
+=item B<-d:>I<foo[=bar,baz]>
runs the program under the control of a debugging, profiling, or
tracing module installed as Devel::foo. E.g., B<-d:DProf> executes
-the program using the Devel::DProf profiler. See L<perldebug>.
+the program using the Devel::DProf profiler. As with the B<-M>
+flag, options may be passed to the Devel::foo package where they
+will be received and interpreted by the Devel::foo::import routine.
+The comma-separated list of options must follow a C<=> character.
+See L<perldebug>.
=item B<-D>I<letters>
line after the program name but before any filename arguments (or before
a B<-->). Any switch found there is removed from @ARGV and sets the
corresponding variable in the Perl program. The following program
-prints "true" if and only if the program is invoked with a B<-xyz> switch.
+prints "1" if the program is invoked with a B<-xyz> switch, and "abc"
+if it is invoked with B<-xyz=abc>.
#!/usr/bin/perl -s
- if ($xyz) { print "true\n" }
+ if ($xyz) { print "$xyz\n" }
=item B<-S>
C<__WARN__> hooks, as described in L<perlvar> and L<perlfunc/warn>.
See also L<perldiag> and L<perltrap>. A new, fine-grained warning
facility is also available if you want to manipulate entire classes
-of warnings; see L<warnings> (or better yet, its source code) about
-that.
+of warnings; see L<warnings> or L<perllexwarn>.
=item B<-W>
-Enables all warnings regardless of
+Enables all warnings regardless of C<no warnings> or C<$^W>.
See L<perllexwarn>.
=item B<-X>
-Disables all warnings regardless of
+Disables all warnings regardless of C<use warnings> or C<$^W>.
See L<perllexwarn>.
=item B<-x> I<directory>
this controls the behavior of global destruction of objects and other
references.
+=item PERL_ROOT (specific to the VMS port)
+
+A translation concealed rooted logical name that contains perl and the
+logical device for the @INC path on VMS only. Other logical names that
+affect perl on VMS include PERLSHR, PERL_ENV_TABLES, and
+SYS$TIMEZONE_DIFFERENTIAL but are optional and discussed further in
+L<perlvms> and in F<README.vms> in the Perl source distribution.
+
+=item SYS$LOGIN (specific to the VMS port)
+
+Used if chdir has no argument and HOME and LOGDIR are not set.
+
=back
Perl also has environment variables that control how Perl handles data