GNU bug report logs - #15880
Compute C declarations for DEFSYMs automatically.

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Message #29 received at 15880 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: eggert <at> cs.ucla.edu, 15880 <at> debbugs.gnu.org
Subject: Re: bug#15880: Compute C declarations for DEFSYMs automatically.
Date: Wed, 13 Nov 2013 17:00:36 -0500

>> I'm wondering about one issue, tho: this creates a "big single file
>> dependency", so addition/removal of a DEFSYM somewhere causes
>> recompilation of all files.
> How is that different from changing variables and functions exposed to
> Lisp, and the dependency on globals.h?

Fundamentally, it's no different, but I think that in practice it's
different for one reason: the type of a Qfoo variable is always
Lisp_Object, so there's never a need to recompile because that
object changed.  So the cases where recompilation is warranted are
less frequent.


        Stefan

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