Re: Symbol's value as variable is void: lpr-command

[Simon Josefsson <jas@extundo.com>]

deskpot@myrealbox.com (Vasily Korytov) writes:

> I've just updatet Oort from CVS. When (require ...)'ing gnus-load it
> stops with the error: Symbol's value as variable is void: lpr-command.
> If I define lpr-command, the same is for lpr-switches.
>
> When I define both prior to (require 'gnus-load), it works again.
>
> The problem is in file mailcap.el, in the following strings:
>
> (defvar mailcap-print-command
>   (mapconcat 'identity
>              (cons lpr-command
>                    (if (stringp lpr-switches)
>                        (list lpr-switches)
>                      lpr-switches))
>              " ")
>   "Shell command (including switches) used to print Postscript files.")
>
> Currently I can't find the XEmacs equivalent of lpr-command and
> lpr-swithes (assuming, there're some), and would suggest checking for
> these variables, if they're not bound, setting them to "lpr" and "". Can
> anyone suggest a better way?

Installing the ps-print package would solve it, but it is not listed
in the requirements for running Gnus, so maybe we should work around
it.  If you apply the following patch, does Gnus work?  If more
workarounds are needed, perhaps the ps-print package should simply be
added to the prerequisites.

--- mailcap.el.~6.14.~	Fri Jan 17 09:53:07 2003
+++ mailcap.el	Mon Jan 20 11:30:29 2003
@@ -51,10 +51,14 @@
 
 (defvar mailcap-print-command
   (mapconcat 'identity
-	     (cons lpr-command
+	     (cons (if (boundp 'lpr-command)
+		       lpr-command
+		     "lpr")
+		   (if (boundp 'lpr-switches)
 		   (if (stringp lpr-switches)
 		       (list lpr-switches)
-		     lpr-switches))
+			 lpr-switches)
+		     ""))
 	     " ")
   "Shell command (including switches) used to print Postscript files.")