From: David Engster <deng@randomsample.de>
To: Glenn Morris <rgm@gnu.org>
Cc: 16008@debbugs.gnu.org, cedet-devel@lists.sourceforge.net
Subject: bug#16008: semantic/grammar-wy.el cannot be bootstrapped
Date: Sat, 30 Nov 2013 11:00:47 +0100 [thread overview]
Message-ID: <8738me5hv4.fsf__4781.40392010591$1385805688$gmane$org@engster.org> (raw)
In-Reply-To: <677gbqhcbh.fsf@fencepost.gnu.org> (Glenn Morris's message of "Fri, 29 Nov 2013 21:07:30 -0500")
Glenn Morris writes:
> semantic/grammar-wy.el is a generated file and therefore ideally should
> not be kept in the Emacs VCS.
That's true for all parsers. However, grammar-wy.el is special, as
you've noticed.
> It is generated by semantic/grammar.el.
> semantic/grammar.el requires semantic/grammar-wy.el, therefore
> it is not possible to bootstrap without semantic/grammar-wy.el already
> present.
Yes, it has a circular dependency, because the parser grammar-wy.el
parses grammar files, including itself. In upstream, we have a fallback
parser for this, which is used when grammar-wy.el is not present
yet. Needless to say, you'll soon face chicken/egg problems when you do
changes in grammar.wy, which IMHO cause more pain in the rear than
having generated files under version control. In fact, every time I
worked on grammar.wy, I thought about getting rid of bootstrapping at
compile time and just put all parsers under version control.
> I should also note that the version of semantic/grammar-wy.el in the
> Emacs trunk does not match up with its sources.
>
> It contains:
>
> (require 'semantic)
>
> Yet if you regenerate it, it contains:
>
> (require 'semantic/lex)
> (eval-when-compile (require 'semantic/bovine))
Yes, there may be small differences w.r.t. to requires and such. The
generated parsers should never differ, though.
Problem is: the freeze is near, and I have to do another sync with
upstream, and I'd also really like to get a few things fixed before
that.
-David
next prev parent reply other threads:[~2013-11-30 10:00 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-30 2:07 bug#16008: semantic/grammar-wy.el cannot be bootstrapped Glenn Morris
2013-11-30 2:22 ` Glenn Morris
2013-11-30 10:00 ` David Engster [this message]
[not found] ` <8738me5hv4.fsf@engster.org>
2021-04-04 23:24 ` Stefan Monnier
2021-04-05 0:49 ` Glenn Morris
2021-04-05 12:43 ` Eli Zaretskii
2021-04-19 15:51 ` Glenn Morris
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