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Re: Mopre fun with vcswitness
From: |
David Kastrup |
Subject: |
Re: Mopre fun with vcswitness |
Date: |
Sun, 12 Jan 2014 21:46:35 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) |
"Eric S. Raymond" <address@hidden> writes:
> David Kastrup <address@hidden>:
>> > 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
- Mopre fun with vcswitness, Eric S. Raymond, 2014/01/12
- Re: Mopre fun with vcswitness, Andreas Schwab, 2014/01/12
- Re: Mopre fun with vcswitness, David Kastrup, 2014/01/12
- Re: Mopre fun with vcswitness, Eli Zaretskii, 2014/01/12
- Re: Mopre fun with vcswitness, David Kastrup, 2014/01/12
- Re: More fun with vcswitness, Jan Djärv, 2014/01/12
- Re: More fun with vcswitness, Glenn Morris, 2014/01/12
- Re: More fun with vcswitness, Eli Zaretskii, 2014/01/12
- Re: More fun with vcswitness, Stefan Monnier, 2014/01/12
- Re: More fun with vcswitness, Andreas Schwab, 2014/01/13
- Re: More fun with vcswitness, David Kastrup, 2014/01/13
- Re: More fun with vcswitness, Andreas Schwab, 2014/01/13