From owner-freebsd-questions@freebsd.org  Sat Sep  5 14:18:36 2015
Return-Path: <owner-freebsd-questions@freebsd.org>
Delivered-To: freebsd-questions@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id ADC8E9C9095
 for <freebsd-questions@mailman.ysv.freebsd.org>;
 Sat,  5 Sep 2015 14:18:36 +0000 (UTC) (envelope-from wam@hiwaay.net)
Received: from fly.hiwaay.net (fly.hiwaay.net [216.180.54.1])
 (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 64DF5A7C
 for <freebsd-questions@freebsd.org>; Sat,  5 Sep 2015 14:18:36 +0000 (UTC)
 (envelope-from wam@hiwaay.net)
Received: from kabini1.local (dynamic-216-186-222-143.knology.net
 [216.186.222.143] (may be forged)) (authenticated bits=0)
 by fly.hiwaay.net (8.13.8/8.13.8/fly) with ESMTP id t85EIY4E025421
 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO)
 for <freebsd-questions@freebsd.org>; Sat, 5 Sep 2015 09:18:35 -0500
Subject: Re: GCC question
References: <55EAEE19.2060807@hiwaay.net> <20150905140658.GA790@ozzmosis.com>
Cc: FreeBSD Questions !!!! <freebsd-questions@freebsd.org>
From: "William A. Mahaffey III" <wam@hiwaay.net>
Message-ID: <55EAF9BA.3080700@hiwaay.net>
Date: Sat, 5 Sep 2015 09:24:04 -0453.75
User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101
 Thunderbird/38.2.0
MIME-Version: 1.0
In-Reply-To: <20150905140658.GA790@ozzmosis.com>
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 7bit
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions/>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 05 Sep 2015 14:18:36 -0000

On 09/05/15 09:13, andrew clarke wrote:
> On Sat 2015-09-05 08:34:27 UTC-0453, William A. Mahaffey III (wam@hiwaay.net) wrote:
>
>>> I have some code which was originally SGI native, then moved to Linux
>> (FC14 x86_64 & CentOS 5). I am now interested in getting it going under
>> FreeBSD 9.3R. Due to differences in system header file includes, I need
>> to tweek some of my app-specific header files. I have poked around the
>> (*COPIOUS* !!!!) GCC man page & I couldn't find (or missed) either how
>> to get it to regurgitate its default compiler-defines or a tabulation of
>> those defines, so I can use them to conditionally include system headers
>> in my own header files. Where is this info :-) ? TIA & have a nice
>> (long) weekend.
> You probably want:
>
> gcc -dM -E - < /dev/null
>
> Ordinarily to detect FreeBSD you'd use:
>
> #ifdef __FreeBSD__
> ...
> #endif
>

*Booooyah* !!!! Both worked AOK. I haven't used gcc in a while, so there 
may be a few more noob-ish questions to follow :-/ .... Thanks again & 
have a nice weekend.

-- 

	William A. Mahaffey III

  ----------------------------------------------------------------------

	"The M1 Garand is without doubt the finest implement of war
	 ever devised by man."
                            -- Gen. George S. Patton Jr.