GNU bug report logs - #48116
Problems when cross-compiling native-comp

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Anatole Dahan <dahan <at> imj-prg.fr>
To: bug-gnu-emacs <at> gnu.org
Subject: Headers presents but unusable
Date: Fri, 30 Apr 2021 12:30:41 +0200

[Message part 1 (text/plain, inline)]

Hi,

I have encountered errors while configuring emacs, and I was told to send a bug report here. You will find my config.log attached, together with my environment variables.

For context, I am trying to cross-compile native-compilation. I guess this might not be supported, as libgccjit makes it quite complicated (I didn’t yet find a way to bypass the smoke test). I have built the NATIVE libgccjit for i586-linux-musl (maybe I am wrong about that ?)

Anyway, both sys/inotify.h and libgccjit.h are present, but they are marked as missing because they can’t be used (which seems legit, at least for libgccjit, since it is built for native i586-linux-musl). From what I understood, this is considered a bug. 

Best,
—Anatole Dahan

[bug_report.tar (application/octet-stream, attachment)]

[Message part 3 (text/plain, inline)]

Message #10 received at 48116 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Anatole Dahan <dahan <at> imj-prg.fr>
Cc: 48116 <at> debbugs.gnu.org, Andrea Corallo <akrl <at> sdf.org>
Subject: Re: bug#48116: Headers presents but unusable
Date: Sun, 02 May 2021 09:31:08 +0200

Anatole Dahan <dahan <at> imj-prg.fr> writes:

> For context, I am trying to cross-compile native-compilation. I guess
> this might not be supported, as libgccjit makes it quite complicated
> (I didn’t yet find a way to bypass the smoke test).

I'm not sure whether this is supposed to be supported yet or not -- I've
added Andrea to the CCs.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

Message #13 received at 48116 <at> debbugs.gnu.org (full text, mbox):

From: Andrea Corallo <akrl <at> sdf.org>
To: Anatole Dahan <dahan <at> imj-prg.fr>
Cc: 48116 <at> debbugs.gnu.org
Subject: Re: bug#48116: Headers presents but unusable
Date: Sun, 02 May 2021 21:45:25 +0000

Anatole Dahan <dahan <at> imj-prg.fr> writes:

> Hi,
>
> I have encountered errors while configuring emacs, and I was told to send a bug report here. You will find my config.log attached, together with my environment variables.
>
> For context, I am trying to cross-compile native-compilation. I guess
> this might not be supported, as libgccjit makes it quite complicated
> (I didn’t yet find a way to bypass the smoke test). I have built the
> NATIVE libgccjit for i586-linux-musl (maybe I am wrong about that ?)
>
> Anyway, both sys/inotify.h and libgccjit.h are present, but they are
> marked as missing because they can’t be used (which seems legit, at
> least for libgccjit, since it is built for native
> i586-linux-musl). From what I understood, this is considered a bug.
>
> Best,
> —Anatole Dahan

Hi Anatole,

generally speaking we do not support cross compilation using the native
build as libgccjit AFAIK is just not made for cross compiling.  I
suspect in your specific case this should be possible with some hacking
but coming to the problem of bypassing the smoke test I think the
easiest is to start with is commenting it out from configure.ac.

  Andrea

Message #18 received at 48116-done <at> debbugs.gnu.org (full text, mbox):

From: Andrea Corallo <acorallo <at> gnu.org>
To: Andrea Corallo <akrl <at> sdf.org>
Cc: 48116-done <at> debbugs.gnu.org, Anatole Dahan <dahan <at> imj-prg.fr>
Subject: Re: bug#48116: Problems when cross-compiling native-comp
Date: Wed, 07 Jun 2023 17:38:45 -0400

Andrea Corallo <akrl <at> sdf.org> writes:

> Anatole Dahan <dahan <at> imj-prg.fr> writes:
>
>> Hi,
>>
>> I have encountered errors while configuring emacs, and I was told to send a bug report here. You will find my config.log attached, together with my environment variables.
>>
>> For context, I am trying to cross-compile native-compilation. I guess
>> this might not be supported, as libgccjit makes it quite complicated
>> (I didn’t yet find a way to bypass the smoke test). I have built the
>> NATIVE libgccjit for i586-linux-musl (maybe I am wrong about that ?)
>>
>> Anyway, both sys/inotify.h and libgccjit.h are present, but they are
>> marked as missing because they can’t be used (which seems legit, at
>> least for libgccjit, since it is built for native
>> i586-linux-musl). From what I understood, this is considered a bug.
>>
>> Best,
>> —Anatole Dahan
>
> Hi Anatole,
>
> generally speaking we do not support cross compilation using the native
> build as libgccjit AFAIK is just not made for cross compiling.  I
> suspect in your specific case this should be possible with some hacking
> but coming to the problem of bypassing the smoke test I think the
> easiest is to start with is commenting it out from configure.ac.

Closing this old bug as, as mentioned, we (and libgccjit as well) don't
support cross native compiled builds.

Best Regards

  Andrea

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