This feature was practically unused, however, and the command line
switch was therefore "recycled".)
+B<Note:> Since perl 5.10.0, the -C option can no longer be used
+on the #! line. It wasn't working there anyway, since the standard streams
+are already set up at this point in the execution of the perl interpreter.
+You can use binmode() instead to get the desired behaviour.
+
=item B<-c>
X<-c>
lines printed. If a file named by an argument cannot be opened for
some reason, Perl warns you about it and moves on to the next file.
+Also note that C<< <> >> passes command line arguments to
+L<perlfunc/open>, which doesn't necessarily interpret them as file names.
+See L<perlop> for possible security implications.
+
Here is an efficient way to delete all files that haven't been modified for
at least a week: