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From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Po Lu <luangruo@yahoo.com>
Cc: Michael Heerdegen <michael_heerdegen@web.de>,
	 Eli Zaretskii <eliz@gnu.org>,
	 emacs-devel@gnu.org
Subject: Re: Enabling native compilation by default when libgccjit is present
Date: Wed, 08 Dec 2021 08:52:01 -0500	[thread overview]
Message-ID: <jwv8rwvyzzs.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <875yrzg6o4.fsf@yahoo.com> (Po Lu's message of "Wed, 08 Dec 2021 10:40:59 +0800")

> But how are those warnings different from what the user will get if he
> runs `package-install' on a package that causes warnings from the
> byte-compiler?

- By default, package-install compiles all the new files, one after the
  other, in the current Emacs session.  So it tends to emit fewer
  warnings than the native compilation (which compiles each file in
  a fresh new process) because many more packages have already been
  loaded.  This same difference can cause the native-compiled files to
  be miscompiled (because of a lack of `require`s) while the .elc files
  generated during `package-install` work properly.

- Native compilation of a package kicks in when a package that has been
  byte-compiled gets loaded in an Emacs session.
  So the warnings emitted by native-compilation are always *in addition*
  to the warnings that were emitted during `package-install`.

- `.eln` files are specific to a particular Emacs executable, so all the
  `.elc` files you use will be *re*compiled to `.eln` every time you
  start using a new Emacs executable.  For "normal" users this means
  every time they upgrade to a new release.  For people who track
  `master` it can mean "every other day".


        Stefan




  parent reply	other threads:[~2021-12-08 13:52 UTC|newest]

Thread overview: 91+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-02 19:25 Enabling native compilation by default when libgccjit is present Andrea Corallo
2021-12-02 19:39 ` Eli Zaretskii
2021-12-03 16:52   ` Lars Ingebrigtsen
2021-12-03 18:30     ` Eli Zaretskii
2021-12-03 21:27       ` Lars Ingebrigtsen
2021-12-03 18:53     ` Stefan Kangas
2021-12-03 21:30       ` Lars Ingebrigtsen
2021-12-03 22:39         ` Stefan Kangas
2021-12-04  2:48           ` Lars Ingebrigtsen
2021-12-04  7:48             ` Eli Zaretskii
2021-12-04 19:28             ` Andrea Corallo
2021-12-04 19:41               ` Lars Ingebrigtsen
2021-12-04 19:57                 ` Andrea Corallo
2021-12-05  5:04                 ` Richard Stallman
2021-12-05  5:09                   ` Lars Ingebrigtsen
2021-12-05  5:29                     ` Po Lu
2021-12-05  5:31                       ` Lars Ingebrigtsen
2021-12-05  5:46                         ` Po Lu
2021-12-05  5:48                           ` Lars Ingebrigtsen
2021-12-05  6:00                             ` Po Lu
2021-12-05  5:54                         ` Tim Cross
2021-12-05  8:20                           ` Eli Zaretskii
2021-12-05 11:27                           ` Stefan Kangas
2021-12-05 14:15                           ` Jose A. Ortega Ruiz
2021-12-05 16:52                             ` Arthur Miller
2021-12-05 17:42                               ` Jose A. Ortega Ruiz
2021-12-05 20:48                                 ` Arthur Miller
2021-12-05 17:10                             ` Óscar Fuentes
2021-12-05 19:25                               ` Jose A. Ortega Ruiz
2021-12-05 20:55                                 ` Óscar Fuentes
2021-12-05 22:59                                   ` Stefan Monnier
2021-12-05 19:40                               ` Lars Ingebrigtsen
2021-12-05 20:02                                 ` Eli Zaretskii
2021-12-05 20:32                                   ` Lars Ingebrigtsen
2021-12-05 23:03                                     ` Stefan Monnier
2021-12-05 23:05                                       ` Lars Ingebrigtsen
2021-12-05 23:27                                         ` Stefan Monnier
2021-12-05 20:37                                 ` Óscar Fuentes
2021-12-05 21:44                                 ` Arthur Miller
2021-12-05 21:48                                   ` Lars Ingebrigtsen
2021-12-05 22:58                                     ` Arthur Miller
2021-12-05 21:15                               ` Arthur Miller
2021-12-06  4:33                               ` Richard Stallman
2021-12-06 12:59                                 ` Eli Zaretskii
2021-12-06 13:57                                   ` Stefan Monnier
2021-12-06 14:08                                     ` Eli Zaretskii
2021-12-07 16:02                                       ` Matt Armstrong
2021-12-07 16:55                                         ` tomas
2021-12-07 17:02                                         ` T.V Raman
2021-12-05 20:00                             ` Jim Myhrberg
2021-12-06  1:03                               ` Dmitry Gutov
2021-12-06  2:50                                 ` Jim Myhrberg
2021-12-06 12:59                                   ` Dmitry Gutov
2021-12-07  0:34                           ` João Pedro de Amorim Paula
2021-12-08  4:34                             ` Richard Stallman
2021-12-09 17:00                           ` David Koppelman
2021-12-06  4:33                     ` Richard Stallman
2021-12-03 22:34 ` Michael Heerdegen
2021-12-04  7:26   ` Eli Zaretskii
2021-12-07  4:38     ` Michael Heerdegen
2021-12-07  5:02       ` Michael Heerdegen
2021-12-07 13:59         ` Eli Zaretskii
2021-12-08  2:31           ` Michael Heerdegen
2021-12-08  9:55             ` Robert Pluim
2021-12-09  0:56               ` Michael Heerdegen
2021-12-08 12:52             ` Eli Zaretskii
2021-12-08  8:16           ` Andreas Schwab
2021-12-08 13:21             ` Eli Zaretskii
2021-12-09  0:29               ` Michael Heerdegen
2021-12-09  4:49                 ` Stefan Monnier
2021-12-09  5:27                   ` Michael Heerdegen
2021-12-09 10:22                     ` Andrea Corallo
2021-12-09 13:14                     ` Stefan Monnier
2021-12-09 22:28                       ` Michael Heerdegen
2021-12-09 22:50                         ` Michael Heerdegen
2021-12-10  8:06                           ` Eli Zaretskii
2021-12-11  3:11                             ` Michael Heerdegen
2021-12-07 13:53       ` Eli Zaretskii
2021-12-08  2:25         ` Michael Heerdegen
2021-12-08  2:40           ` Po Lu
2021-12-08  3:39             ` Michael Heerdegen
2021-12-08 12:55               ` Eli Zaretskii
2021-12-08 17:08               ` T.V Raman
2021-12-08 13:52             ` Stefan Monnier [this message]
2021-12-08 14:31               ` Eli Zaretskii
2021-12-09  7:19                 ` Óscar Fuentes
2021-12-08 12:51           ` Eli Zaretskii
2021-12-09  0:44             ` Michael Heerdegen
2021-12-09  4:13           ` Richard Stallman
2021-12-09  9:27             ` Eli Zaretskii
  -- strict thread matches above, loose matches on Subject: below --
2021-12-05 17:24 Angelo Graziosi

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