On Tue, Jan 18, 2022 at 02:43:26AM +0000, xuyang2018.jy@xxxxxxxxxxx wrote: > > You're right of course, but out of curiosity, which C library are you > > using? > I use glibc-2.34. Hmm, ok. I'm using glibc 2.31, and in this particular program, errno shouldn't have been set by any prior system call. I'm guessing maybe it was something in crt0 which ended up setting errno? - Ted
