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Re: [PATCH] [WIP] Port feature/native-comp to Windows.

From: Andrea Corallo
Subject: Re: [PATCH] [WIP] Port feature/native-comp to Windows.
Date: Sun, 10 May 2020 12:50:19 -0700
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux)

Nicolas Bértolo <address@hidden> writes:

>> But up front, we can simply use the apriori knowledge about the way the 
>> setjmp
>> macro is expanded in the version used for building Emacs.
> I do not understand this. Do you mean that we should just add the necessary
> expansions to the emit_setjmp() function?
>> But that's a problem on any platform, not just on Windows, isn't it?
>> It would mean that when you upgrade GCC, you need to rebuild Emacs in
>> order to be able to continue natively-compiling Lisp files, even if
>> your Emacs version stays the same.  Is this reasonable?  What will
>> GNU/Linux users do that install binary distributions of Emacs -- will
>> they have to install a very particular version of GCC to be able to
>> compile to native code, and never upgrade it, except together with
>> upgrading Emacs?  Sounds very inconvenient to me.
> Exactly. I suppose libgccjit has a stable ABI, so it should not be a problem 
> to
> update libgccjit. The user will need to ensure that the version of libgccjit
> loaded by Emacs has its corresponding GCC installation present.

I think that's the misunderstanding: libgccjit *is* GCC.  No external
compiler is required.


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