[webkit-dev] Using C++20 in WebKit

Alex Christensen achristensen at apple.com
Mon Jan 24 13:43:08 PST 2022

Ok.  We won’t raise the minimum CMake version for all of WebKit right now then, just on Windows when we start requiring VS2022.

> On Jan 22, 2022, at 1:44 PM, Carlos Alberto Lopez Perez via webkit-dev <webkit-dev at lists.webkit.org> wrote:
> On 22/01/2022 01:51, Alex Christensen via webkit-dev wrote:
>> While we’re updating things, is there any objection to updating the
>> minimum version of CMake required?  Right now it is 3.12, which was
>> released in 2018.  Does anyone have any limitations we should consider
>> when picking a new minimum version?
> Yes.
> CMake is one of the core dependencies for GTK and WPE ports, so the
> policy of dependencies applies [1]
> In practical terms that means that we should support the version of
> CMake shipped by Debian 10, which is CMake 3.13 until at least 2022-08-14.
> However, If the purpose of raising the version is to take advantage of
> the new Visual Studio generator then I don't think raising the minimum
> version is needed.
> As far as I know you can take advantage of newer CMake features (like
> support for a newer generator) without needing to raise the minimum
> version required.
> So if you have a newer version of CMake you can simply pass the flag
> -G"Visual Studio 17 2022" (or similar). Raising the minimum version
> required of CMake is not needed to use a newer CMake generator, using it
> can be made optional for those that want (and can) use it.
> [1] https://trac.webkit.org/wiki/WebKitGTK/DependenciesPolicy
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