From: David Kastrup <dak@gnu.org>
To: emacs-devel@gnu.org
Subject: Re: Mopre fun with vcswitness
Date: Sun, 12 Jan 2014 21:46:35 +0100 [thread overview]
Message-ID: <87vbxpapxw.fsf@fencepost.gnu.org> (raw)
In-Reply-To: 20140112203140.GA19193@thyrsus.com
"Eric S. Raymond" <esr@thyrsus.com> writes:
> David Kastrup <dak@gnu.org>:
>> > VCSWITNESS: $(srcdir)/../.bzr/checkout/dirstate
>> >
>> > While this is nonempty, it's not going to work either.
>>
>> I don't see that.
>
> I believe you. Which just increases my distrust of this code.
>
> You and I and Eli are running in environments we think ought not to be
> significantly different (in-place builds) and yet we get at least two
> and possibly three different behaviors (Eli hasn't reported his
> exactly enough for me to be sure).
"I don't see that" does not mean that I see a particular behavior when
running the code (I did not do so), but it rather means that I don't
agree with your conclusion.
> To add to the fun, I think this is different behavior than I was
> previously seeing from putatively identical code.
Where "putatively" means what _you_ remember being identical. I already
opined that I consider it most likely you forgot a \ in your added code,
leading to different shell instances defining and printing vcswitness.
Quite a common Makefile fallacy. An ugly design decision in my opinion,
but then it's been around for more than 30 years I think, so it's not
really likely to change.
> There's got to be some hidden state we're all missing.
Because you cannot reproduce what you think you saw before? That's a
mystery nobody but yourself has a chance of addressing.
--
David Kastrup
next prev parent reply other threads:[~2014-01-12 20:46 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-12 20:07 Mopre fun with vcswitness Eric S. Raymond
2014-01-12 20:14 ` Andreas Schwab
2014-01-12 21:08 ` Eli Zaretskii
2014-01-12 20:18 ` David Kastrup
2014-01-12 20:31 ` Eric S. Raymond
2014-01-12 20:46 ` David Kastrup [this message]
2014-01-12 21:02 ` Eric S. Raymond
2014-01-12 21:12 ` Eli Zaretskii
2014-01-12 21:30 ` David Kastrup
2014-01-12 22:19 ` More " Jan Djärv
2014-01-13 2:46 ` Glenn Morris
2014-01-13 3:50 ` Eli Zaretskii
2014-01-13 4:19 ` Stefan Monnier
2014-01-13 10:12 ` Andreas Schwab
2014-01-13 11:12 ` David Kastrup
2014-01-13 11:30 ` Andreas Schwab
2014-01-13 14:30 ` Stefan Monnier
2014-01-13 17:37 ` Glenn Morris
2014-01-13 19:03 ` Glenn Morris
2014-01-13 19:13 ` Eli Zaretskii
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