From: Trond Myklebust <trond.myklebust@fys.uio.no>
To: Ram <vshrirama@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Floating point computations in kernel modules
Date: Mon, 17 Sep 2007 10:13:43 -0400 [thread overview]
Message-ID: <1190038423.6700.17.camel@heimdal.trondhjem.org> (raw)
In-Reply-To: <8bf247760709170706j6025bb14k8ab28f9467972c76@mail.gmail.com>
On Mon, 2007-09-17 at 19:36 +0530, Ram wrote:
> Hi,
>
> I am trying to write a driver which uses double, float. I am using
> an arm11 with gcc 3.4.4
>
> When i try to compile my modules (with float variables) i get the error
>
> WARNING: "__extendsfdf2" undefined!
> WARNING: "__mulsf3"undefined!
> WARNING: "__fixsfsi"undefined!
> WARNING: "__floatsisf"undefined!
>
> Can we use float, double in kernel modules?.
>
> Obviously it is a linking error, I am using soft-float. I tried with
> -msoft-float but got the same result.
>
> I suspect that its a toolchain issue. However i am able to compile
> my applications
> with float, double variables.
>
>
> Please do advice.
>
>
> Regards,
> sriram
> -
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> Please read the FAQ at http://www.tux.org/lkml/
Feel free to peruse the Documentation directory before posting. More
specifically, Documentation/DocBook/kernel-hacking.tmpl has a chapter
called 'Some Basic Rules' which addresses your question.
Trond
next prev parent reply other threads:[~2007-09-17 14:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-17 14:06 Ram
2007-09-17 14:13 ` Trond Myklebust [this message]
2007-09-17 14:17 ` Markus Rechberger
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