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Date: Mon, 18 Jun 2018 16:02:00 -0000
From: Joseph Myers <joseph@codesourcery.com>
To: Richard Biener <richard.guenther@gmail.com>
CC: Thomas Koenig <tkoenig@netcologne.de>, Florian Weimer <fw@deneb.enyo.de>,	Jakub Jelinek <jakub@redhat.com>, <szabolcs.nagy@arm.com>, Janne Blomqvist	<blomqvist.janne@gmail.com>, <nd@arm.com>, GCC Development <gcc@gcc.gnu.org>,	"fortran@gcc.gnu.org" <fortran@gcc.gnu.org>, <sellcey@cavium.com>
Subject: Re: libmvec in gcc to have vector math in fortran
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On Mon, 18 Jun 2018, Richard Biener wrote:

> I'm thinking of sth like the C stdc-predef.h header which is always included
> by the compiler.  So it needs to be sth parseable by gfortran which means
> it needs to be a module or sth equivalent to a fortran include file.

To me that suggests something provided by the C library (which might 
contain preprocessor conditionals, the Fortran front end supports 
preprocessing with the target-specific predefined macros being in effect)

-- 
Joseph S. Myers
joseph@codesourcery.com