Re: [PATCH] Project out of sources compilation

[Ergus <spacibba@aol.com>]

On Thu, Apr 04, 2024 at 04:02:50PM +0300, Eli Zaretskii wrote:
>> Date: Thu, 4 Apr 2024 14:34:16 +0200
>> From: Ergus <spacibba@aol.com>
>> Cc: Hi-Angel@yandex.ru, rms@gnu.org, dmitry@gutov.dev, emacs-devel@gnu.org
>>
>> On Thu, Apr 04, 2024 at 02:59:27PM +0300, Eli Zaretskii wrote:
>> >
>> >You are saying that Emacs can load project.elc from a wrong directory?
>> >Any reproducible recipe for that?
>> >
>> No Eli:
>>
>> That's not what I mean.
>
>Actually, yes, that's what you meant.
>
>> mkdir build1 && cd build1 && ../configure ... && make
>> cd ..
>>
>> edit project.el
>> mkdir build2 && cd build2 && ../configure ... && make
>> cd ..
>>
>> build1/src/emacs -Q
>>
>> This will load the new elc, not the one used when it was compiled in
>> spite of we have not recompiled in that build dir.
>
>AFAIU, it doesn't load the new project.elc from build2, it loads
>project.el (i.e. uncompiled Lisp) from the source tree, where you
>modified project.el.
>
>The reason is that Emacs's support for "running uininstalled" assumes
>the Lisp files are in the source tree.  IOW, running uninstalled from
>a build directory outside of the source tree does not take the *.elc
>files from that build directory, as I think you can verify if you look
>at the value of load-path.

Exactly, so this is not OOSC and does not behave as expected in
OOSC. Which is what Konstantin pointed out since the beginning.