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Subject: Re: [boost] [trippels-ppc64le][math] Missing quadmath.h errors
From: John Maddock (jz.maddock_at_[hidden])
Date: 2015-11-16 06:47:41

On 16/11/2015 10:48, Andrey Semashev wrote:
> Hi,
> I'm seeing some test failures on the trippels-powerpc64le-gcc-6.0
> tester that amount to Boost.Math failing to build because the
> quadmath.h header is missing.
> I understand that gcc 6.0 is an unreleased compiler, but the error is
> probably not a consequence of a compiler bug. Besides, another tester,
> Flast-FreeBSD10-gcc-6.0.0~gnu++11, passes. Is it possible that the
> header is not provided for powerpc64le? Or is an optional dependency
> whose presence is misdetected? Is this a known problem?

Not a known problem, no.

My understanding is that libquadmath is an integral part of GCC, and I
see that BOOST_HAS_FLOAT128 is defined for that platform - and that's
predicated on _GLIBCXX_USE_FLOAT128 so __float128 appears to be
supported? The GCC manual is a little unclear to me when this is
supposed to be supported:

What happens on that platform with older (released) compilers?

Thanks, John.

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