Date: Thu, 13 Sep 2012 09:42:52 -0700 From: Steve Kargl <sgk@troutmask.apl.washington.edu> To: Stefan Farfeleder <stefanf@FreeBSD.org> 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 Message-ID: <20120913164252.GA18024@troutmask.apl.washington.edu> In-Reply-To: <20120913162537.GE1368@mole.fafoe.narf.at> References: <20120911120649.GA52235@freebsd.org> <20120911132410.GA87126@troutmask.apl.washington.edu> <504F4645.4070900@FreeBSD.org> <504F4A6B.4010001@coosemans.org> <504F5101.8090906@FreeBSD.org> <505101C3.70203@freebsd.org> <20120913020833.GA8255@troutmask.apl.washington.edu> <1347550332.1110.108.camel@revolution.hippie.lan> <20120913161024.GA13846@troutmask.apl.washington.edu> <20120913162537.GE1368@mole.fafoe.narf.at>
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On Thu, Sep 13, 2012 at 06:25:37PM +0200, Stefan Farfeleder wrote: > 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. > Hmmm, indeed, you are correct. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34678 I seems to have mis-remembered a patch that went into newer gcc. -- Steve
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