X-From-Line: address@hidden  Sun Jul 30 12:28:50 2003
Return-path: <address@hidden>
Envelope-to: address@hidden
Delivery-date: Wed, 30 Jul 2003 06:30:04 +0200
Received: from hermes.epita.fr ([163.5.255.10] helo=epita.fr)
	by kualalumpur.lrde.epita.fr with esmtp (Exim 3.35 #1 (Debian))
	id 19hibE-0007OG-00
	for <address@hidden>; Wed, 30 Jul 2003 06:30:04 +0200
Received: from f7.net (consort.superb.net [209.61.216.22])
	by epita.fr id h6U4U4210973 for <address@hidden> 
	EPITA Paris France Wed, 30 Jul 2003 06:30:04 +0200 (CEST)
Received: from monty-python.gnu.org (monty-python.gnu.org [199.232.76.173])
	by f7.net (8.11.7/8.11.7) with ESMTP id h6U4TwS03249;
	Wed, 30 Jul 2003 00:29:58 -0400
Received: from localhost ([127.0.0.1] helo=monty-python.gnu.org)
	by monty-python.gnu.org with esmtp (Exim 4.20)
	id 19hiaN-0001N6-LJ
	for address@hidden; Wed, 30 Jul 2003 00:29:11 -0400
Received: from list by monty-python.gnu.org with tmda-scanned (Exim 4.20)
	id 19hiZw-0000Ey-PA
	for address@hidden; Wed, 30 Jul 2003 00:28:44 -0400
Received: from mail by monty-python.gnu.org with spam-scanned (Exim 4.20)
	id 19hiYz-0007Uh-Qp
	for address@hidden; Wed, 30 Jul 2003 00:27:47 -0400
Received: from smtp014.mail.yahoo.com ([216.136.173.58])
	by monty-python.gnu.org with smtp (Exim 4.20) id 19hiYN-0007Dm-M5
	for address@hidden; Wed, 30 Jul 2003 00:27:07 -0400
Received: from unknown (HELO ?144.138.106.199?) (address@hidden
	with plain)
	by smtp.mail.vip.sc5.yahoo.com with SMTP; 30 Jul 2003 04:27:04 -0000
From: Steve Chaplin <address@hidden>
To: address@hidden
Content-Type: text/plain
Organization: 
X-Gnus-Mail-Source: pop:address@hidden
Message-Id: <address@hidden>
Mime-Version: 1.0
X-Mailer: Ximian Evolution 1.2.2 (1.2.2-4) 
Date: 30 Jul 2003 12:28:50 +0800
Content-Transfer-Encoding: 7bit
Subject: Missing prerequisite headers
X-BeenThere: address@hidden
X-Mailman-Version: 2.1.2
Precedence: list
List-Id: Bug reports for autoconf, the GNU build system
	<bug-autoconf.gnu.org>
List-Unsubscribe: <http://mail.gnu.org/mailman/listinfo/bug-autoconf>,
	<mailto:address@hidden>
List-Archive: <http://mail.gnu.org/pipermail/bug-autoconf>
List-Post: <mailto:address@hidden>
List-Help: <mailto:address@hidden>
List-Subscribe: <http://mail.gnu.org/mailman/listinfo/bug-autoconf>,
	<mailto:address@hidden>
Sender: address@hidden
Errors-To: address@hidden
X-Spam-Status: No, hits=1.0 required=5.0 tests=FROM_ENDS_IN_NUMS version=2.20
X-Spam-Level: *
Status:   
X-Content-Length: 1156
Lines: 33
Xref: nostromo.lrde.epita.fr autoconf.bug:2765

Regarding this problem which has now become an autoconf FAQ:

configure: WARNING: linux/irda.h: present but cannot be compiled
configure: WARNING: linux/irda.h:     check for missing prerequisite
headers?
configure: WARNING: linux/irda.h: see the Autoconf documentation
configure: WARNING: linux/irda.h:     section "Present But Cannot Be
Compiled"
configure: WARNING: linux/irda.h: proceeding with the preprocessor's
result
configure: WARNING: linux/irda.h: in the future, the compiler will take
precedence
configure: WARNING:     ## ------------------------------------------ ##
configure: WARNING:     ## Report this to the AC_PACKAGE_NAME lists.  ##
configure: WARNING:     ## ------------------------------------------ ##


The FAQ suggests modifying configure.in to #include the prerequisite
header file - so the problem is a package maintainers problem.

Wouldn't it be better to first ask the header file author/maintainer to
modify the header to #include the prerequisite file (I assume this fixes
the problem) fixing the problem in one go for all packages that use the
header check?

Regards
Steve
-- 
Steve Chaplin <address@hidden>