From: Stefan Monnier <monnier@iro.umontreal.ca>
To: dancol@dancol.org
Cc: Eli Zaretskii <eliz@gnu.org>, emacs-devel@gnu.org
Subject: Re: [Emacs-diffs] master d826037 3/3: Remove the need for temacs.in
Date: Sun, 14 Apr 2019 13:30:50 -0400 [thread overview]
Message-ID: <jwvd0lomrhd.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <59835b95-50e3-4e8e-b116-ae3915aef875@email.android.com> (dancol@dancol.org's message of "Sun, 14 Apr 2019 08:47:42 -0700")
> The fingerprint is not guaranteed foolproof when computed from the *.o
> files and is not guaranteed foolproof when made from the temacs.in
> file either.
>
> Isn't it?
I don't see anything in the semantics of `ld` which makes the guarantees
we'd need, no. Maybe current `ld` does, in practice, of course.
> The two approaches are not equally robust.
No, indeed.
> The temacs.in approach is as close as you're going to get to foolproof
> and future proof.
Might be. Actually backpatching the fingerprint into `temacs` might be
in some cases more robust (it doesn't assume that both runs of `ld`
produce the same result).
But my point is just that it's a question of degree.
Just like the compilation time is a question of degree.
Noone is wrong or right here, these are just personal preferences.
I use machines whose age spans between 16 and 5 years (my main work
laptop is more than 10 years old because it's more or less the most
recent 4:3 I could find) so I value speed ups in compilation time
probably more than others on this list.
Stefan
next prev parent reply other threads:[~2019-04-14 17:30 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190409224339.20116.87667@vcs0.savannah.gnu.org>
[not found] ` <20190409224342.0DA1F20E54@vcs0.savannah.gnu.org>
2019-04-10 18:53 ` [Emacs-diffs] master d826037 3/3: Remove the need for temacs.in Daniel Colascione
2019-04-10 19:31 ` Paul Eggert
2019-04-10 19:42 ` Daniel Colascione
2019-04-10 20:43 ` Paul Eggert
2019-04-10 20:56 ` Daniel Colascione
2019-04-11 3:31 ` Paul Eggert
2019-04-11 22:24 ` Daniel Colascione
2019-04-12 3:45 ` Paul Eggert
2019-04-12 4:20 ` Daniel Colascione
2019-04-13 6:52 ` Eli Zaretskii
2019-04-14 3:40 ` Stefan Monnier
2019-04-14 3:43 ` Daniel Colascione
2019-04-14 4:08 ` Stefan Monnier
2019-04-14 14:03 ` Eli Zaretskii
2019-04-14 14:55 ` Stefan Monnier
2019-04-14 15:47 ` dancol
2019-04-14 17:30 ` Stefan Monnier [this message]
2019-04-14 17:44 ` Eli Zaretskii
2019-04-15 0:19 ` Paul Eggert
2019-04-11 19:35 ` Stefan Monnier
2019-04-11 22:15 ` Daniel Colascione
2019-04-11 23:37 ` Stefan Monnier
[not found] ` <20190409224341.BED1520E43@vcs0.savannah.gnu.org>
2019-04-10 19:00 ` [Emacs-diffs] master e44ff2d 2/3: Remove assumption of uint64_t etc. in portable code Daniel Colascione
2019-04-10 19:51 ` Paul Eggert
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