The documentation quoted in this answer mentions two different way of installing a handler for a SIGUSR1 signal, namely:
(define-key special-event-map [sigusr1] 'sigusr1-handler)
and
(global-set-key [signal usr1] 'sigusr1-handler)
(I changed the names of the handlers in the snippets above to make them both the same.)
Could someone explain when and why one would choose one of these approaches over the other?
