Date: Sat, 5 Sep 2015 09:24:04 -0453.75 From: "William A. Mahaffey III" <wam@hiwaay.net> Cc: FreeBSD Questions !!!! <freebsd-questions@freebsd.org> Subject: Re: GCC question Message-ID: <55EAF9BA.3080700@hiwaay.net> In-Reply-To: <20150905140658.GA790@ozzmosis.com> References: <55EAEE19.2060807@hiwaay.net> <20150905140658.GA790@ozzmosis.com>
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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.
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