Kinda frustrating that I just spent so much time (hours) trying to get my Arch Linux installation to boot because at some point the whirlpool hashing algorithm was marked deprecated upstream and not mentioned except maybe at the upstream website/source code repository. Not sure I agree with the decision upstream but I'm not the one who has the maintain the code. AFAIK there's nothing wrong with the algo it's just not used widely so openssl moved it to a "legacy" module last year.