From owner-cvs-all@FreeBSD.ORG Mon May 5 20:47:22 2008 Return-Path: Delivered-To: cvs-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C231B106566B; Mon, 5 May 2008 20:47:22 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from elvis.mu.org (elvis.mu.org [192.203.228.196]) by mx1.freebsd.org (Postfix) with ESMTP id 9B95B8FC1A; Mon, 5 May 2008 20:47:22 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from server.baldwin.cx (unknown [208.65.91.234]) by elvis.mu.org (Postfix) with ESMTP id 543221A4D8D; Mon, 5 May 2008 13:47:22 -0700 (PDT) Received: from localhost.corp.yahoo.com (john@localhost [127.0.0.1]) (authenticated bits=0) by server.baldwin.cx (8.14.2/8.14.2) with ESMTP id m45KlA7R070338; Mon, 5 May 2008 16:47:10 -0400 (EDT) (envelope-from jhb@freebsd.org) From: John Baldwin To: Peter Jeremy Date: Mon, 5 May 2008 16:37:42 -0400 User-Agent: KMail/1.9.7 References: <200805051603.m45G3rrN089219@repoman.freebsd.org> <200805051459.29200.jhb@freebsd.org> <20080505192417.GS7293@server.vk2pj.dyndns.org> In-Reply-To: <20080505192417.GS7293@server.vk2pj.dyndns.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200805051637.43073.jhb@freebsd.org> X-Greylist: Sender succeeded SMTP AUTH authentication, not delayed by milter-greylist-2.0.2 (server.baldwin.cx [127.0.0.1]); Mon, 05 May 2008 16:47:10 -0400 (EDT) X-Virus-Scanned: ClamAV 0.91.2/7036/Mon May 5 14:56:03 2008 on server.baldwin.cx X-Virus-Status: Clean X-Spam-Status: No, score=-4.4 required=4.2 tests=ALL_TRUSTED,AWL,BAYES_00 autolearn=ham version=3.1.3 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on server.baldwin.cx Cc: cvs-src@freebsd.org, Alfred Perlstein , src-committers@freebsd.org, cvs-all@freebsd.org Subject: Re: cvs commit: src/include stdio.h src/lib/libc/stdio clrerr.c feof.c ferror.c fileno.c getc.c getchar.c local.h putc.c putchar.c xprintf.c X-BeenThere: cvs-all@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: CVS commit messages for the entire tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 May 2008 20:47:22 -0000 On Monday 05 May 2008 03:24:17 pm Peter Jeremy wrote: > On Mon, May 05, 2008 at 02:59:28PM -0400, John Baldwin wrote: > >On Monday 05 May 2008 02:40:03 pm Alfred Perlstein wrote: > >> I'm _not_ objecting, just interested in why. > >> > >> Any references to discussions on this? Are we now safe for > >> future compat or something? > > > >Having FILE be opaque broke just about every 'configure' script on the > >planet. :( > > Either autoconf and friends are _intended_ as impediments to > portability or they are completely broken by design. It appears that autoconf only believes a type is real if you can typedef it to another type, cast 0 to a valid pointer to the new typedef'd type, and do a sizeof() of the typdef'd type. The last is where having an opaque type breaks down for scripts that want to make sure FILE is a real type. -- John Baldwin