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Date: Thu, 13 Sep 2012 18:25:37 +0200
From: Stefan Farfeleder <stefanf@FreeBSD.org>
To: Steve Kargl <sgk@troutmask.apl.washington.edu>
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Cc: Ian Lepore <freebsd@damnhippie.dyndns.org>,
	Tijl Coosemans <tijl@coosemans.org>, current@freebsd.org,
	Dimitry Andric <dim@freebsd.org>, toolchain@freebsd.org,
	Nathan Whitehorn <nwhitehorn@freebsd.org>
Subject: Re: Clang as default compiler November 4th
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On Thu, Sep 13, 2012 at 09:10:24AM -0700, Steve Kargl wrote:
> clang -O2 -pipe -march=opteron -O0 -lm  test-cexp.c  -o test-cexp
> test-cexp.c:49:14: warning: pragma STDC FENV_ACCESS ON is not supported, ignoring pragma [-Wunknown-pragmas]
> #pragma STDC FENV_ACCESS        ON

[...]

> So, clang does not support "#pragma STDC FENV_ACCESS ON".
> That (IMHO) is a show stopper for clang as the default compiler,
> because at least msun/src/e_sqrtl.c uses this pragma.

Neither does gcc, AFAIK (http://gcc.gnu.org/c99status.html). It just
silently ignores the pragma.

Stefan