RFR: 8314488: Compile the JDK as C++17 [v6]

[Magnus Ihse Bursie]

On Fri, 19 Jan 2024 12:08:21 GMT, Julian Waters <jwaters at openjdk.org> wrote:

>> Julian Waters has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Require clang 13 in toolchain.m4
>
> Should I split the compiler upgrades into a different change and integrate that first? Going off the conversation in this thread it would seem like the compiler upgrade would benefit us a lot more than just having C++17 (The noreturn attribute is one big motivating factor for instance) and it might help if the compiler upgrades were not delayed by the discussion of when to jump to C++17

@TheShermanTanker I suggest you close this PR. If we are going to switch to C++17, it should start by a discussion in the mailing list, not with a PR (the change itself is trivial).

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PR Comment: https://git.openjdk.org/jdk/pull/14988#issuecomment-2074487573