Hi all.

I tried using the following shim header to satisfy <err.h> in a package I
want to build.

https://raw.githubusercontent.com/libressl-portable/portable/master/include/err.h

It looked pretty neat since it does everything in the header.

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?