Message-ID: <136299.99390.qm@web25506.mail.ukl.yahoo.com>
Date: Wed, 8 Sep 2010 06:36:46 +0000 (GMT)
From: Marco Atzeri <marco_atzeri AT yahoo DOT it>
Subject: R: Quad precision floating point package for gfortran
To: cygwin AT cygwin DOT com
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--- Mer 8/9/10, Jerry DeLisle ha scritto:

> We are developing a quad precision
> floating point library for use with gfortran.
>=20
> When attempting to build the library under Cygwin, we are
> stopped because:
>=20
> __float128 is not supported when running the ./configure
> for the package.=A0 I suspect the issue may be related to
> newlib vs glibc, but I really don't know.
>=20

on cygwin we have=20

double =3D 64 bits
long double =3D 96 bits

but no float128

http://gcc.gnu.org/ml/gcc-patches/2009-05/msg00985.html

> Do any of the Cygwin maintainers have any hints about
> this?=A0 I am still investigating.=A0 It would be nice
> to have this quad precision capability under Cygwin.=A0
> The library is a software floating point library and does
> not depend on having special hardware.=A0 We have it
> running on i686 and x86-64 Linux, but so far no luck under
> Windows.=A0 If I learn more in the next few days, I will
> report here.
>=20
> Any suggestions would be appreciated.

I leave that to Dave :-)
but I guess you need to add them on newlib=20
as there is no float128 there.

>=20
> Best regards,
>=20
> Jerry

Marco


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