DragonFlyBSD

I'm currently working on this, especially for the most important cases (
platform/${arch}/${arch}/trap.c ).

corecode commented on this on IRC, and it seems the changes should not focus
just on adding support for si_code but rather a major overhaul.
New signal code using signal queues should be added instead of just hacking the
current code to support si_code and si_addr.

Possibly FreeBSD can be used as a reference as they use signal queues and
si_code/si_addr. Their basic structure is ksiginfo_t in sys/signalvar.h.

About this: I really think we should implement si_code and si_addr asap,
without any major overhaul or anything. Not having for example CLD_EXITED
breaks pkgsrc build of boost-libs, which in turn breaks 40-something more
packages. Both FreeBSD and NetBSD support this properly.

Any comments?

Cheers,
Alex Hornung

Alex Hornung (via DragonFly issue tracker) wrote:
> Alex Hornung <ahornung@gmail.com> added the comment:
>
> About this: I really think we should implement si_code and si_addr asap,
> without any major overhaul or anything. Not having for example CLD_EXITED
> breaks pkgsrc build of boost-libs, which in turn breaks 40-something more
> packages. Both FreeBSD and NetBSD support this properly.
>
> Any comments?

Agreed.

The most basic part made it into master already. This includes si_code for
most of the traps, and the proper defines for all of the si_code. This
unbreaks build of boost-libs, too, but still doesn't properly assign all the
SIGCHLD codes.

Cheers,
Alex Hornung