When perl is compiled with -DDEBUGGING, this prints to STDERR the information given by the arguments, prefaced by the name of the file containing the script causing the call, and the line number within that file.
-DDEBUGGING
If the v (verbose) debugging option is in effect, the process id is also printed.
v
The two forms differ only in that deb_nocontext does not take a thread context (aTHX) parameter, so is used in situations where the caller doesn't already have the thread context.
deb_nocontext
aTHX
This is like "deb", but args are an encapsulated argument list.
"deb"
args
Dump the current stack
To install less, copy and paste the appropriate command in to your terminal.
cpanm
cpanm less
CPAN shell
perl -MCPAN -e shell install less
For more information on module installation, please visit the detailed CPAN module installation guide.