[igt-dev] [PATCH i-g-t] ci: build with Clang

[Arkadiusz Hiler]

On Thu, Apr 25, 2019 at 03:49:49PM +0200, Daniel Vetter wrote:
> On Thu, Apr 25, 2019 at 01:05:28PM +0300, Jani Nikula wrote:
> > On Thu, 25 Apr 2019, Daniel Vetter <daniel at ffwll.ch> wrote:
> > > On Wed, Apr 24, 2019 at 07:15:26PM +0300, Simon Ser wrote:
> > >> This adds a build step with Clang on Fedora. Hopefully this can help keeping
> > >> Clang builds healthy.
> > >> 
> > >> Signed-off-by: Simon Ser <simon.ser at intel.com>
> > >> ---
> > >>  .gitlab-ci.yml | 8 ++++++++
> > >>  1 file changed, 8 insertions(+)
> > >> 
> > >> diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
> > >> index ae8cbb67..e7d31376 100644
> > >> --- a/.gitlab-ci.yml
> > >> +++ b/.gitlab-ci.yml
> > >> @@ -47,6 +47,14 @@ build:tests-fedora-oldest-meson:
> > >>      - ninja -C build
> > >>      - ninja -C build igt-gpu-tools-doc
> > >>  
> > >> +build:tests-fedora-clang:
> > >> +  stage: build
> > >> +  script:
> > >> +    - dnf install -y clang
> > >> +    - export CC=clang
> > >> +    - meson $MESON_OPTIONS build
> > >> +    - ninja -C build
> > >
> > > Uh why?
> > >
> > > The thing that broken is building on non-x86 hosts, and that's the thing
> > > gitlab CI caught. I have no idea why this is all about clang (imo it's
> > > not), and I don't think we should care about clang either.
> > 
> > And why shouldn't we care about clang?
> 
> What I meant is: We already have gitlab ci targets that caught the recent
> clang regression (because a lot more broke). No one gave a shit from what
> I can tell, so I guess I'm questioning the value of more gitlab CI targets
> in general. We could fix that by going to merge requests and blocking
> pulls that fail to build I guess.

The value is that we do see breakages. We get emails and we can fix this
up post-factum.

Even today, thanks to gilab-ci we fixed breakage in autotools just
moments after it happened.

Most of the checks in the gitlab-ci are not our main way of operation
(meson + x86 + gcc), but they still allow us to be better citizens of
the community. People use various arch and compilers, and as long as
they care and express that interest by sending patches I am okay with
it.

Even if we catch that something broke few days after it happened we have
just one thing to fix, instead of someone coming months down the line
and having to fix what would be a completelty broken tree on their
setup.

-- 
Cheers,
Arek