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Date:      Sun, 29 Nov 2015 10:19:47 +0000
From:      Matthew Seaman <matthew@FreeBSD.org>
To:        freebsd-questions@freebsd.org
Subject:   Re: gcc macros
Message-ID:  <565AD143.8040301@FreeBSD.org>
In-Reply-To: <565A73C6.4090306@hiwaay.net>
References:  <565A73C6.4090306@hiwaay.net>

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On 29/11/2015 03:39, William A. Mahaffey III wrote:
> I use the Intel compiler suite (icc & ifort) to maintain some inhouse
> code under Linux. The man pages for icc clearly list all macros defined=

> &/or used by icc in one neat section. I have yet to locate such a
> listing for macros under gcc's under FreeBSD 9.3R (gcc48, gcc49 & gcc5)=
=2E
> Is there such a listing documented somewhere, & if so where ? TIA & hav=
e
> a good one ....

Try:

  cc -dM -E - < /dev/null

which will print all of the pre-processor definitions used by the
compiler.   You can add other flags like eg.  --std=3Dc89 if you like.

	Cheers,

	Matthew



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