bug#46495: 28.0.50; [native-comp] Build fails for 32bit --with-wide-int

[Andrea Corallo]

Andrea Corallo via "Bug reports for GNU Emacs, the Swiss army knife of
text editors" <bug-gnu-emacs@gnu.org> writes:

> Eli Zaretskii <eliz@gnu.org> writes:
>
>> On February 15, 2021 11:01:19 AM GMT+02:00, Andy Moreton 
>> <andrewjmoreton@gmail.com> wrote:
>>> On Sun 14 Feb 2021, Eli Zaretskii wrote:
>>> 
>>> >> From: Andy Moreton <andrewjmoreton@gmail.com>
>>> >> Date: Sun, 14 Feb 2021 13:24:32 +0000
>>> >> 
>>> >> > I suspect that this problem may not be Windows-specific, and
>>> should be
>>> >> > reproducable on Linux, but I have not tried that.
>>> >> 
>>> >> I have also tried the mingw.org 32bit toolchain (i686-pc-mingw32)
>>> when
>>> >> configured with with "--with-nativecomp --with-wide-int", and that
>>> >> works.
>>> >
>>> > Thanks, that's good news.
>>> >
>>> >> Thus this bug seems to be a problem with the MSYS2 mingw32 32bit
>>> >> toolchain (i686-w64-mingw32) only.
>>> >
>>> > It does seem that way, although I wonder what could that problem
>>> be...
>>> 
>>> I have only just discovered this news item:
>>> 
>>> https://www.msys2.org/news/#2020-05-17-32-bit-msys2-no-longer-actively-supported
>>> 
>>> Perhaps that means that only the mingw.org (i686-w64-mingw32)
>>> toolchain
>>> should be supported for 32bit builds on Windows.
>>> 
>>>     AndyM
>>
>> Right, but Andrea said there were problems on Posix systems as well with 
>> this configuration, so it could be that something else is at work here.
>
> Confirm, I see a problem compiling closures, this should be the
> responsible for the bootstrap to be broken (at least on my case).
>
> Yesterday I've already reduced a small reproducer so I should be on the
> good way to understand during the next debug session why this is
> happening only on wide-int.
>
> It will be interesting why is working in some configuration and not in
> others.
>
>   Andrea

Andy could you point out the two libgccjit versions you used specifying
wich one was used in the successfull / failed experiment?

Thanks

  Andrea