Glad you found the root of the problem, and that it's not in gnulib.
- [PATCH] openat-die: use _Noreturn markup Eric Blake
- Re: [PATCH] openat-die: use _Noreturn markup Eric Blake
- Re: [PATCH] openat-die: use _Noreturn markup Eric Blake
- Re: [PATCH] openat-die: use _Noreturn markup Jim Meyering
- Re: [PATCH] openat-die: use _Noreturn markup Paul Eggert
- stdnoreturn ideas [was: [PATCH] openat-die: use ... Eric Blake
- [PATCH v2] openat-die: use _Noreturn markup Eric Blake
