On 25 May 2015 at 19:44, Jens Staal <staal1...@gmail.com> wrote: > It did however not work (I guess the "..." and "##" are to blame?) so now > I wonder how/if it is possible with the posix compiler on plan9?
It doesn't understand the named ... variant, which I suppose is more recent tinkering. Use the older __VA_ARGS__. Also I didn't think your use of ## was correct in any case (you can only concatenate things that produce a valid token). It looked as though #define err(exitcode, format, ...) \ errx(exitcode, format ": %s", __VA_ARGS__, strerror(errno)) etc might work.
