On Tue, 15 Aug 2023 at 01:49, Kent Gibson <warthog618@xxxxxxxxx> wrote: > gpiod_line_set_flags() was a relatively recent addition to libgpiod, so > my guess is you have an old gpiod.h being included by your build. > Though that was added in 1.5, so it would have to be older than that. Ah, yes, that will be it. I forgot that I went back to Raspbian/Buster and that has v1.2 -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1912