freebsd has _null.h (and so does bitrig) that file's only purpose is to define NULL which i presume is the same as netbsd's null.h
i think it's better than having tons of duplicate NULL definitions in the headers... (jmc@ pointed out to me in private more or less the same issue with my suggestion but i figured i'd wait until i produced a patch for _null.h in openbsd) On Sat, Mar 30, 2013 at 3:33 AM, Otto Moerbeek <o...@drijf.net> wrote: > On Mon, Mar 18, 2013 at 03:31:29PM -0430, Andres Perera wrote: > >> Various macros in <sys/queue.h> depend on NULL; however, the header >> does not define NULL, nor does it include another header that fulfills the >> dependency. >> >> diff --git a/share/man/man3/queue.3 b/share/man/man3/queue.3 >> index c54e932..5a2e30c 100644 >> --- a/share/man/man3/queue.3 >> +++ b/share/man/man3/queue.3 >> @@ -120,6 +120,7 @@ >> .Nm CIRCLEQ_REPLACE >> .Nd "implementations of singly-linked lists, doubly-linked lists, simple >> queues, tail queues, and circular queues" >> .Sh SYNOPSIS >> +.Fd #include <sys/types.h> >> .Fd #include <sys/queue.h> >> .Pp >> .Fn SLIST_ENTRY "TYPE" > > This is harder that is seems at first sight. <sys/types.h> does not > define NULL in all cases. i.e. if __BSD_VISIBLE is not defined, this > won't wont work. So depending on things like _ANSI_SOURCE and > __POSIX_VISIBLE you still don't get NULL. > > netbsd has solved it by creating an ugly include <sys/null.h>, freebsd > did not solve it either, afaiks. A local NULL define could do it. Will have > to think about this a bit. > > -Otto
