Incompatible definition of "struct kevent" in "sys/event.h"

[Matthias Scheler <tron%zhadum.org.uk@localhost>]

        Hello,

"struct kevent" as defined in "sys/event.h" looks like this:

struct kevent {
[...]
        intptr_t        udata;          /* opaque user data identifier */
};

The problem is that FreeBSD, OpenBSD and Darwin all define "udata"
as "void". This causes problems in e.g. the "libtorrent" package.
This is a deliberate change in NetBSD:

----------------------------
revision 1.1.1.1.2.11
date: 2002/10/02 19:09:36;  author: jdolecek;  state: Exp;  lines: +2 -2
make 'udata' field of struct kevent intptr_t (was 'void *')
----------------------------

Does anybody know why this incompatibility was invented?

        Kind regards

-- 
Matthias Scheler                                  http://zhadum.org.uk/