Re: Merging MPS a.k.a. scratch/igc, yet again

[Gregor Zattler]

Hi Pip, Emacs developers,
* Pip Cet via "Emacs development discussions." <emacs-devel@gnu.org> 
[2024-12-19; 17:32 GMT]:
> "Gregor Zattler" <telegraph@gmx.net> writes:
> Does anyone remember what our conclusion was wrt
> -fno-omit-frame-pointer?  I seem to remember there was a patch to MPS to
> avoid relying on setjmp() to save all registers, but I'd still be
> happier if we enabled that for all MPS builds, since we don't know
> whether our MPS has the patch.
>
>> I built mps as instructed in README-IGC,
>> but tried to build emacs with -O3 and it
>> crashed.  I can reproduce and file a
>> bug, if you are interested.
>
> I'm definitely interested.  It might just be the -fomit-frame-pointer
> thing, but if people run into that, clearly our configure script needs
> to be modified to explicitly request -fno-omit-frame-pointer.

that seems to be the case: With
-fomit-frame-pointer I was able to build
scratch/igc with -O3.  Using it just
now.

Regards, Gregor