the language.
If you build a version of the Perl interpreter with C<-DDEBUGGING>,
-Perl's B<-D> commandline flag will cause copious debugging information
+Perl's B<-D> command line flag will cause copious debugging information
to be emitted (see the C<perlrun> manpage). If you build a version of
Perl with compiler debugging information (e.g. with the C compiler's
C<-g> option instead of C<-O>) then you can step through the execution