princepawn has asked for the wisdom of the Perl Monks concerning the following question:

Hi, thanks to the tutelage of people here, it is clear that any robust programmer should always use strict, warnings, and perldiag. Thus I want to always load these by default. How can I set up Perl/my environment to do so?
PERL5OPT="-Mstrict -Mwarnings -Mdiagnostics"
only honours the first -M option. The others are ignored.