RFR: 8330520: linux clang build fails in os_linux.cpp with static_assert with no message is a C++17 extension [v2]

[Matthias Baesken]

On Wed, 17 Apr 2024 15:41:28 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

>> We run into the following build error when compiling on Linux ppc64le with the clang toolchain
>> 
>> 
>> jdk/src/hotspot/os/linux/os_linux.cpp:2975:65: error: 'static_assert' with no message is a C++17 extension [-Werror,-Wc++17-extensions]
>> static_assert(MADV_POPULATE_WRITE == MADV_POPULATE_WRITE_value);
>> 
>> 
>> Currently it is not clear when "8314488: Compile the JDK as C++17" will be in the codebase so better fix the static_assert .
>
> Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:
> 
>   use STATIC_ASSERT

Hi Stefan, thanks for the review !

I removed ppc64le from the title, because the issue can be seen too on Linux x86_64 when building with the clang toolchain.

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PR Comment: https://git.openjdk.org/jdk/pull/18816#issuecomment-2063178866