From: Andrea Corallo <akrl@sdf.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: max.brieiev@gmail.com, larsi@gnus.org, 58429@debbugs.gnu.org
Subject: bug#58429: 29.0.50; inhibit-automatic-native-compilation does not work as expected.
Date: Sat, 15 Oct 2022 16:01:15 +0000 [thread overview]
Message-ID: <xjfilklvzxw.fsf@ma.sdf.org> (raw)
In-Reply-To: <83bkqd78fj.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 15 Oct 2022 12:17:04 +0300")
Eli Zaretskii <eliz@gnu.org> writes:
>> From: Andrea Corallo <akrl@sdf.org>
>> Cc: max.brieiev@gmail.com, larsi@gnus.org, 58429@debbugs.gnu.org
>> Date: Fri, 14 Oct 2022 20:10:57 +0000
>>
>> Eli Zaretskii <eliz@gnu.org> writes:
>>
>> > If non-nil enable primitive trampoline synthesis.
>> > This makes primitive functions redefinable or advisable effectively.
>> >
>> > which seems to hint that when this is nil, primitives cannot be
>> > advised or redefined?
>>
>> They can, but they will not take effect on Lisp code that is native
>> compiled (at speed 2), similarly to when they are called from C code.
>>
>> > We set this variable to nil in startup.el if
>> > native-comp-available-p returns nil (which currently can only happen
>> > on MS-Windows), AFAIU with the intent to prevent Emacs from even
>> > trying to natively-compile anything, including trampolines. But if
>> > Emacs cannot produce a trampoline, it means that primitives cannot be
>> > redefined, and we silently fail that? Because (again, AFAIU)
>> > native-comp-available-p being nil does not prevent Emacs from loading
>> > *.eln files that are already compiled (because just loading them
>> > doesn't need libgccjit), is that right?
>>
>> Correct, as you said Emacs will work, only we can't guarantee that
>> primitive redefinition will take the effect expected by the user (unless
>> of course trampolines were precompiled, in that case it's all good).
>
> Thanks. I therefore extended the doc string of this variable (on the
> emacs-28 branch) to make this crystal clear.
Thanks
prev parent reply other threads:[~2022-10-15 16:01 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-11 7:21 bug#58429: 29.0.50; inhibit-automatic-native-compilation does not work as expected Max Brieiev
2022-10-11 8:11 ` Lars Ingebrigtsen
2022-10-11 9:19 ` Max Brieiev
2022-10-11 19:37 ` Andrea Corallo
2022-10-11 19:41 ` Lars Ingebrigtsen
2022-10-11 20:49 ` Andrea Corallo
2022-10-12 10:57 ` Lars Ingebrigtsen
2022-10-12 11:15 ` Max Brieiev
2022-10-12 11:30 ` Lars Ingebrigtsen
2022-10-12 11:57 ` Max Brieiev
2022-10-12 12:59 ` Lars Ingebrigtsen
2022-10-12 13:31 ` Eli Zaretskii
2022-10-12 14:11 ` Max Brieiev
2022-10-12 15:32 ` Eli Zaretskii
2022-10-12 16:54 ` Max Brieiev
2022-10-12 17:07 ` Eli Zaretskii
2022-10-13 14:10 ` Andrea Corallo
2022-10-13 16:05 ` Eli Zaretskii
2022-10-14 20:10 ` Andrea Corallo
2022-10-15 9:17 ` Eli Zaretskii
2022-10-15 16:01 ` Andrea Corallo [this message]
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