[cfe-dev] [libcxx-dev] [llvm-dev] Upcoming change with how libc++, libc++abi and libunwind are being built

[Louis Dionne via cfe-dev]

On Tue, Oct 19, 2021 at 9:17 AM Brian Cain <bcain at quicinc.com> wrote:

> Louis,
>
>
>
> Do libcxx/abi, clang code reviews on phabricator trigger these buildkite
> builds similar to some of the other monorepo content?
>

Yes. There is both a rolling build (every 4 hours I think) building `main`,
and also the full CI pipeline runs every time you upload a review on
Phabricator that touches libc++, libc++abi or libunwind.

It's been working like that for roughly one year now and it's the best
thing ever, we ship way fewer bugs and our development velocity has
increased a lot.

Louis


>
>
> -Brian
>
>
>
> *From:* libcxx-dev <libcxx-dev-bounces at lists.llvm.org> * On Behalf Of *Louis
> Dionne via libcxx-dev
> *Sent:* Monday, October 18, 2021 3:19 PM
> *To:* Michael Kruse <llvmdev at meinersbur.de>
> *Cc:* llvm-dev <llvm-dev at lists.llvm.org>; clang developer list <
> cfe-dev at lists.llvm.org>; Libc++ Dev <libcxx-dev at lists.llvm.org>
> *Subject:* Re: [libcxx-dev] [llvm-dev] Upcoming change with how libc++,
> libc++abi and libunwind are being built
>
>
>
> *WARNING:* This email originated from outside of Qualcomm. Please be wary
> of any links or attachments, and do not enable macros.
>
>
>
>
>
> On Mon, Oct 18, 2021 at 2:49 PM Michael Kruse <llvmdev at meinersbur.de>
> wrote:
>
> Am Mo., 18. Okt. 2021 um 13:06 Uhr schrieb Louis Dionne <
> ldionne.2 at gmail.com>:
> > On Mon, Oct 18, 2021 at 12:23 PM Michael Kruse <llvmdev at meinersbur.de>
> wrote:
> > The build bots that wish to build libc++ with a supported
> non-clang-trunk compiler
> > can switch to the "default build", which is basically the equivalent of
> the Project
> > build we had before.
>
> Which buildbots will test the "default build" for gcc/AppleClang/Clang
> 11/Clang 12? Individual buildbot maintainers may be interested in
> keeping their buildbot green, not necessarily to ensure coverage.
>
>
>
> Nowadays, we handle all libc++'s own build bots through BuildKite at
> https://buildkite.com/llvm-project/libcxx-ci.
>
>
>
> That pipeline contains all the configurations that we support officially.
> If someone has a build bot and
>
> they think they are adding coverage, we'd like to know it so we can look
> into migrating it to BuildKite
>
> and owning it ourselves.
>
>
>
> Otherwise, they should just make whatever change is needed to keep their
> bot green. In most cases I
>
> would expect the easiest thing to do here would be to use the
> Bootstrapping build so as to always build
>
> against the latest Clang, however they can also use the "Default build"
> with a suitably-recent system
>
> compiler if they want to avoid building all of Clang on their bot.
>
>
>
> Cheers,
>
> Louis
>
>
>
>
>
>
> Michael
>
>
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