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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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
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