RFR: 8339783: Implement JEP 479: Remove the Windows 32-bit x86 Port [v17]

[Magnus Ihse Bursie]

On Mon, 4 Nov 2024 09:45:05 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

>>> Can we get rid of `JNICALL` too, please?
>>> 
>>> Or would that change be too big?
>> 
>> There's >1000 in java.base, lots more elsewhere, so it would be a lot of files and would hide the core changes. So maybe for a follow-up PR that does the one thing.
>
>> > Can we get rid of `JNICALL` too, please?
>> > Or would that change be too big?
>> 
>> There's >1000 in java.base, lots more elsewhere, so it would be a lot of files and would hide the core changes. So maybe for a follow-up PR that does the one thing.
> 
> Yeah. I count >8000 places in total...
> 
> Maybe just define JNICALL to be empty in jni_md.h for now.

@tstuefe Your comment reminded me of another important cleanup, to remove `__stdcall` (and `_stdcall`, an accepted but not recommended variant) from the code base. This only has meaning on 32-bit Windows.

Furthermore, when searching for this, I found additional code that is looking for symbol names of "__stdcall format", i.e. `<name>@<number>`. This is not needed anymore. I'll delete it where I find it, but there might be other places that I'm missing.

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PR Comment: https://git.openjdk.org/jdk/pull/21744#issuecomment-2455215002