From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.5 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 175E7C4363D for ; Fri, 2 Oct 2020 20:14:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D6D15206E3 for ; Fri, 2 Oct 2020 20:14:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725648AbgJBUOD convert rfc822-to-8bit (ORCPT ); Fri, 2 Oct 2020 16:14:03 -0400 Received: from zimbra.cs.ucla.edu ([131.179.128.68]:33610 "EHLO zimbra.cs.ucla.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725379AbgJBUOD (ORCPT ); Fri, 2 Oct 2020 16:14:03 -0400 Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id EBB381600D1; Fri, 2 Oct 2020 13:14:02 -0700 (PDT) Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id WxOiNx4hrrsE; Fri, 2 Oct 2020 13:14:02 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 37F851600DA; Fri, 2 Oct 2020 13:14:02 -0700 (PDT) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id tseiFp9g3r0C; Fri, 2 Oct 2020 13:14:02 -0700 (PDT) Received: from [192.168.1.9] (cpe-23-243-218-95.socal.res.rr.com [23.243.218.95]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id EFEFC1600D1; Fri, 2 Oct 2020 13:14:01 -0700 (PDT) Subject: Re: [PATCH v4 1/2] system_data_types.7: Add 'void *' To: Alejandro Colomar Cc: mtk.manpages@gmail.com, linux-man@vger.kernel.org, gcc-patches@gcc.gnu.org, libc-alpha@sourceware.org, linux-kernel@vger.kernel.org, jwakely.gcc@gmail.com, David.Laight@ACULAB.COM References: <20201002121645.23646-1-colomar.6.4.3@gmail.com> <20201002151419.32053-2-colomar.6.4.3@gmail.com> <3941e130-df05-778b-dc76-90cd58400192@cs.ucla.edu> From: Paul Eggert Autocrypt: addr=eggert@cs.ucla.edu; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8BIT Precedence: bulk List-ID: X-Mailing-List: linux-man@vger.kernel.org On 10/2/20 11:38 AM, Alejandro Colomar wrote: > .I void * > > renders with a space in between. That's odd, as "man(7)" says "All of the arguments will be printed next to each other without intervening spaces". I'd play it safe and quote the arg anyway. > > %p works with any object pointer type (or in POSIX, any pointer type), > > not just  void *. > In theory, no (if otherwise, I'd like to know why): Oh, you're right. I had missed that. In GNU/Linux hosts, though, any pointer (including function pointers) can be given to %p. The only platforms where %p wouldn't work on all pointers would be platforms like IBM i, which has both 64-bit (process local) pointers and 128-bit (tagged space) pointers and where you can declare and use pointers of different widths in the same program.