2023-12-28T19:29:52Z Theo de Raadt <dera...@openbsd.org>: >> To my understanding it's an old BSDism and it's used to implement >> isupper(3), islower(3), etc. > > The names may be old BSD, but this is following a pretty strong ISO rule > that names starting with '_' are in reserved, and trying to use them > yourself is undefined. > > Changing them to another name that won't collide? Maybe, I've no opinion.
Right, just found this[1]. Thanks Theo and Theo :) [1] https://www.gnu.org/software/libc/manual/html_node/Reserved-Names.html
