Re: [PATCH] emacs: Compute build dependencies to fix byte compile issues

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+Date: Sun, 19 May 2013 08:14:40 -0400\r
+From: Austin Clements <amdragon@MIT.EDU>\r
+To: David Bremner <david@tethera.net>\r
+Subject: Re: [PATCH] emacs: Compute build dependencies to fix byte compile\r
+       issues\r
+Message-ID: <20130519121440.GE5999@mit.edu>\r
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+\r
+Quoth David Bremner on May 19 at  8:15 am:\r
+> Austin Clements <amdragon@MIT.EDU> writes:\r
+> >\r
+> > This patch addresses these problems by computing make dependency rules\r
+> > from the (require 'x) forms in the Elisp source files, which we inject\r
+> > into make's dependency database.\r
+> \r
+> this seems to work as advertised.\r
+> \r
+> > +;;\r
+> > +;; Copyright © Austin Clements\r
+> \r
+> I guess you need a copyright year?\r
+\r
+Strangely, none of the Elisp files have copyright years.  But maybe\r
+they should?\r
+\r
+> > +      ;; Is it a (require 'x) form?\r
+> > +      (when (and (listp form) (= (length form) 2)\r
+> > +                 (eq (car form) 'require)\r
+> > +                 (listp (cadr form)) (= (length (cadr form)) 2)\r
+> > +                 (eq (car (cadr form)) 'quote)\r
+> > +                 (symbolp (cadr (cadr form))))\r
+> \r
+> This might be a corner case, but formally can't the argument to require\r
+> be a variable or even a function call? Maybe this never happens in\r
+> practice.\r
+\r
+That is technically true (really, it can be an arbitrary expression),\r
+but I don't have an environment in which to evaluate that expression,\r
+so I opted for only supporting the obvious static case, which also\r
+happens to be the only case that matters for the notmuch code.\r