32768 D Cleaning up
65536 S Thread synchronization
131072 T Tokenising
+ 262144 R Include reference counts of dumped variables (eg when using -Ds)
All these flags require B<-DDEBUGGING> when you compile the Perl
executable. See the F<INSTALL> file in the Perl source distribution
with the next one (if it exists).
For a discussion of issues surrounding file permissions and B<-i>,
-see L<perlfaq5/Why does Perl let me delete read-only files? Why
-does -i clobber protected files? Isn't this a bug in Perl?>.
+see L<perlfaq5/Why does Perl let me delete read-only files? Why does -i clobber protected files? Isn't this a bug in Perl?>.
You cannot use B<-i> to create directories or to strip extensions from
files.