This is heavily language runtime dependent — there’s nothing that fundamentally stops you from doing anything during the phase between jumping to an entry point and the main()
replyIndeed the craziest among us occasionally abuse this fact, so long as the compiler implementation lets us.
replyRight. This tends to come up with packages, which just by virtue of being loaded, set up to do something such as log, print, catch errors, or phone home to something.
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