Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!brl-adm!brl-smoke!gwyn From: gwyn@brl-smoke.ARPA (Doug Gwyn ) Newsgroups: comp.lang.c Subject: Re: Questions on X3J11 draft Message-ID: <5446@brl-smoke.ARPA> Date: Mon, 15-Dec-86 10:50:34 EST Article-I.D.: brl-smok.5446 Posted: Mon Dec 15 10:50:34 1986 Date-Received: Tue, 16-Dec-86 20:59:28 EST References: <351@danews.ATT.COM> <7373@utzoo.UUCP> <3800@watmath.UUCP> <775@axis.UUCP> Reply-To: gwyn@brl.arpa (Doug Gwyn (VLD/VMB)) Organization: Ballistic Research Lab (BRL), APG, MD. Lines: 6 In article <775@axis.UUCP> philip@axis.UUCP (Philip Peake) writes: >How can I know, when trying to write portable code, if the 'library' >function I am going to use is a real function or a macro ? The only time it can matter is if it's a macro and you need a function. In this case, #undef it first (this is harmless if it's not a macro).