[Xenomai-help] Soft float point

[Xenomai-help] Soft float point

[Felipe Castro]

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Hi,

I'm having some problems to compile with -msoft-float. I'm using xenomai in
a PXA270 processor.
So to get a task with 5ms resolution for example, e need to compile with
-msoft-float parameter right?

My toolchain must be prebuilt to use a soft float point ?
Should i recompile xenomai with -msoft-float ?

Thanks

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Re: [Xenomai-help] Soft float point

[Gilles Chanteperdrix]

Felipe Castro wrote:
> Hi,
> 
> I'm having some problems to compile with -msoft-float. I'm using xenomai
> in a PXA270 processor.
> So to get a task with 5ms resolution for example, e need to compile with
> -msoft-float parameter right?
> 
> My toolchain must be prebuilt to use a soft float point ?
> Should i recompile xenomai with -msoft-float ?

Yes hard floats are not implemented on PXA. You MUST recompile Xenomai
user-space with -msoft-float. Normally toolchains allow generating
soft-floats. But, because there is always a but:

If you do not use EABI, the whole root filesystem must be compiled with
-msoft-float. Including the glibc. With EABI, on the other hand, you can
mix soft floats and hard float code.

A lot of people use CodeSourcery toolchains on ARM. Normally, with
Xenomai 2.4.9, the latest one should work.

-- 
                                          Gilles