[webkit-dev] Request for upgrading xcode toolchains in Apple bots for C++17

[Yusuke SUZUKI]

Thanks,

On Tue, May 22, 2018 at 1:30 AM Alexey Proskuryakov <ap at webkit.org> wrote:

> Hi,
>
> To clarify, are you asking specifically for mac-32bit EWS to be upgraded?
>

No, I'm asking for upgrading mac/ios bots except for mac-32bit.


> It has Xcode 9.2, and can be upgraded to 9.3.1 (that will be a multi-step
> process, as we need to keep the version in sync with several other setups).
> But macOS Sierra bots have Xcode 8.3.3, and that is the latest release for
> Sierra.
>

Oh! Hmm, OK. So, to avoid build failures, we need to have the way to
distinguish these 8.3.3's clang from 9.2 - 9.3.1 clangs.
In terms of the implementation status of C++17, it is not a problem. Even
clang 4 shows good status compared to GCC 6.


>
> - Alexey
>
>
> 21 мая 2018 г., в 6:44, Yusuke SUZUKI <utatane.tea at gmail.com> написал(а):
>
> Hi WebKittens, in particular Apple bot maintainers!
>
> We are about to enable C++17 in all the WebKit ports, and the last step is
> enabling C++17 for Xcode[1].
> While the latest shipped Xcode (w/ clang) supports C++17 option
> (`-std=gnu++17`), EWS build bots do not support this. Some build bots
> accept `-std=c++1z`, this option causes trouble in the latest Xcode (e.g.
> mac-32bit uses the newer Xcode).
>
> Can we upgrade Xcodes in EWS and buildbots to the latest ones to accept
> C++17 option? Once it is done, WebKit starts using fancy C++17 features
> listed in GCC 6.0.
>
> Best regards,
> Yusuke Suzuki
>
> [1]: https://bugs.webkit.org/show_bug.cgi?id=185176
>
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>
>
> - Alexey
>
>
>
>
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