Re: Softfloat on ARM?
On Wed, Feb 14, 2007 at 12:20:19PM +0100, Aurelien Jarno wrote:
> >>> I also cross-compiled the kernel on a x86 laptop (1.5 GHz) and that took
> >>> me about half an hour. First, I though that it wasn't working right (I
> >> Note that you need to use an arm eabi toolchain. Building an eabi kernel
> >> with an old abi toolchain work, and the kernel seems to works, but then
> >> you will have some problems wrt to ioctls. For example Alsa do not work.
> >
> > Hm, I used to compile my EABI kernels with an old-ABI toolchain for a
> > while, and that I think works just fine.
> >
> > The case where ALSA doesn't work is where you run an old-ABI userland
> > on top of an EABI kernel (because the kernel does not translate ioctls.)
>
> True, but I also experienced the reverse on my NSLU2. Ie an EABI kernel
> compiled with an old-ABI toolchain and running EABI binaries. My USB
> card was not working with ALSA.
That sounds like you might be running into gcc PR27363. If you've built
your old-ABI toolchain without a patch for PR27363, you _will_ run into
issues of this kind.
> It may be due to the way the structures are packed.
Shouldn't matter -- if you use a gcc 4.1 that defaults to old-ABI to
compile your kernel but pass it command line options to set the ABI
to aapcs-linux (i.e. EABI, like the linux kernel build does), it
should work.
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