Re: [OE-core] [PATCH] dhcp: use included bind version

["Richard Purdie" <richard.purdie@linuxfoundation.org>]

On Wed, 2020-06-10 at 16:35 +0200, Vyacheslav Yurkov wrote:
> From: Vyacheslav Yurkov <Vyacheslav.Yurkov@bruker.com>
> 
> ISC DHCP should link against BIND9 libraries, which are tailored
> specifically for DHCP. BIND9 package in Yocto core layer has
> different
> configuraiton, in particular it has threads and epoll enabled.
> 
> ISC DHCP isn't a multi-threaded application, running it with bind9
> libraries compiled in with threading enabled is not something ISC can
> vouch for.
> 
> BIND9 libraries support a lot of options specifically geared towards
> optimizing DNS operations, many of which do not play nicely with
> ISC DHCP's "architecture".  It isn't necessarily practical to build
> those libraries for both purposes.
> 
> If threading is enabled, then DHCP sporadically fails/crashes with
> messages like:
> 
> lib/isc/unix/socket.c:1054: epoll_ctl(DEL), 6: Bad file descriptor
> lib/isc/unix/socket.c:3332: INSIST(!sock->pending_send) failed.

You seem to disable parallel make yet no mention of that in the log?

Why doesn't dhcp build and link against a static libbind by default if
these issues are present the the dhcp authors don't want to work with
such libbinds?

Cheers,

Richard