RFR: 8314488: Compile the JDK as C++17 [v5]

[Matthias Baesken]

On Wed, 10 Jan 2024 13:11:38 GMT, Julian Waters <jwaters at openjdk.org> wrote:

>> Compile the JDK as C++17, enabling the use of all C++17 language features
>
> Julian Waters has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Remove unnecessary -std=c++17 option in Lib.gmk

Hi Martin, probably we can update our devkit if really needed.
But 
https://clang.llvm.org/cxx_status.html
states that c++17 is supported for a very long time, so probably  clang 13.1 is sufficient too (or is there a real showstopper known with this release) .

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PR Comment: https://git.openjdk.org/jdk/pull/14988#issuecomment-1884892708