CI status update

[Denis Ovsienko via tcpdump-workers <tcpdump-workers () lists tcpdump org>]

> --- Begin Message ---
>
>
> From: Denis Ovsienko <denis () ovsienko info>
>
> Date: Mon, 5 Apr 2021 10:42:39 +0100
>
> Hello list.
>
> I hope you have a great day. Please find below a brief overview of some
> current continuous integration matters.
>
> The Linux/s390x problem space is now covered with the IBM Z CI service
> provided by Oregon State University Open Source Lab. It uses Jenkins
> and is not in the same loop as most other builds (i.e. no automatic
> github.com commit status updates, at least for now), but people will
> still get e-mails when things break.
>
> The Buildbot configuration at ci.tcpdump.org has been growing, it
> currently includes some permutations of Linux, BSD, 32-bit/64-bit ARM
> and AMD64. Harald Welte of sysmocom has sponsored and hosted three
> RPIs, which currently run about half the builds of this infrastructure.
>
> The most useful view of the existing Buildbot configuration is probably
> this (it has tags and filtering): https://ci.tcpdump.org/#/builders
>
> Since tcpdump and libpcap originate in the Unix-like systems world, it
> is remarkable that this is the first time CI covers Linux, FreeBSD,
> NetBSD and OpenBSD on a given architecture: in this sense AArch64 is
> fully covered by means of Buildbot and AMD64 is split between Buildbot
> and Cirrus CI.
>
> That said, adding NetBSD and OpenBSD had chased a few bugs out, some of
> which I managed to fix quickly, but a few remain. To get to a starting
> point with all builds passing, it had taken to omit some matrix
> elements.
>
> In particular, NetBSD has two libpcap libraries (one that comes with
> the system and another that comes from pkgsrc), slightly different from
> each other and from the upstream libpcap. Linking with these libraries
> turned out to be difficult, so for the time being tcpdump on NetBSD
> builds with local libpcap only and tcpdump build matrix is 2 times
> smaller than usual.
>
> On OpenBSD there is a slightly different issue, in that tcpdump always 
> links with the system libpcap.so, but the latter is too old to pass the
> tests. Also tcpdump fails to link with ../libpcap/libpcap.so when
> tcpdump is compiled using GCC (libpcap is always compiled using the
> default compiler, which in this case is Clang). Also CMake fails to
> build tcpdump properly. This way, tcpdump build matrix is 4 times
> smaller. Also tcpslice produces too many warnings and fails the build.
>
> I cannot remember exact details now, but they are recorded in the
> failed build logs, and as soon as the build matrix is the usual size
> again, the build issues should manifest. It would be great if someone
> could look into these issues, identify the reasons for failure and tell
> what can be fixed easily.
>
> -- 
>     Denis Ovsienko
>
> --- End Message ---
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