Re: [feature/native-comp] breakage on build

[Andrea Corallo via "Emacs development discussions." <emacs-devel@gnu.org>]

Phillip Lord <phillip.lord@russet.org.uk> writes:

> Eli Zaretskii <eliz@gnu.org> writes:
>
>>> From: Phillip Lord <phillip.lord@russet.org.uk>
>>> Cc: akrl@sdf.org,  emacs-devel@gnu.org
>>> Date: Sat, 06 Feb 2021 12:58:59 +0000
>>> 
>> Could it be that Emacs when started from the mingw64 shell picks up
>> GCC components from this PATH, and thus GCC will then look for the
>> libraries and object files for native-comp in the "normal" mingw64
>> installation, not in the Emacs tree you created?  In that case the
>> fact that native-comp works from the mingw64 shell is not interesting,
>> as ll it says that your duplicate GCC installation is somehow
>> incomplete.
>>
>> I don't see any other variable that I think could be related.  (But I
>> don't use MinGW64, so I could miss something.)  However, you show the
>> exported variables from the MSYS Bash, whereas what we need to look at
>> is the environment variables as seen by GCC, when it is run from
>> Emacs.  The value of process-environment in both cases should be a
>> good first step.
>
>
> Eli, Oscar, Andrea
>
> Apologies, I had forgotten that I had moved machines during testing. It
> was simply the path (and exec-path) that was missing. My own time is
> mine to waste, but apologies for wasting yours.
>
> I am coming to the conclusion that I am going the wrong path here. I
> think supporting native-comp and keeping a sanely sized Emacs
> distribution are not compatible objectives. I do not want to return to
> the Emacs-26 distribution, which included a lot of msys2.
>
> I think that the base distribution of Emacs-28 should not include
> JIT native-comp. If people want this, they should get it through the
> msys2 co-installation that Oscar and I have been talking of.
>
> However, we could just do a full AOT native-comp, so at least the
> Emacs-28 packages would all benefit. Andrea, can the native-comp branch
> still load *eln files even if it can't produce them?

Yes, libgccjit is not needed for loading elns.  There might be some minors to
look at as I've never tested this configuration but should be no
problem.

  Andrea