On Sun, 2011-02-20 at 09:14 +0100, Koen Kooi wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> On 19-02-11 20:28, Jonathan Wilson wrote:
> > Bitbake bombs out with:-
> >
> > ERROR: Build
> > of
> > /home/wilsonjonathan/oebeagle/angstrom-setup-scripts/sources/openembedded/recipes/gnome/pyorbit_2.24.0.bb
> > do_configure failed
> > ERROR: Task 8977
> > (/home/wilsonjonathan/oebeagle/angstrom-setup-scripts/sources/openembedded/recipes/gnome/pyorbit_2.24.0.bb,
> > do_configure) failed with exit code 1
> >
> > Changes manually made to files before compilation.
> >
> > local.conf
> > BB_NUMBER_THREADS = "2"
> >
> > DISTRO = "angstrom-2010.x"
> > MACHINE ?= "beagleboard"
> >
> > # Set TMPDIR instead of defaulting it to /tmp
> > TMPDIR =
> >
> > "/home/wilsonjonathan/oebeagle/angstrom-setup-scripts/build/tmp-angstrom_2010.x"
> >
> > tune-cortexa8.inc
> > ARM_FP_MODE ?= "hardfp"
>
> Why are you changing that there? You are supposed to set that in local.conf
Total lack of understanding of the language used in .bb files. Re: "?="
which I'm guessing does mean if variable is not set then set it.
I'm not a pc programmer, AS/400's application programmer by trade, but
rather a hobbyist playing around with arm linux since getting some
rather cool NAT's to store my photo library.
>
> > To produce hard float, -funsafe... was added due to a note on the TI
> > website.
>
> It works well without that flag, which website told you to add it?
As per the gcc website :
http://gcc.gnu.org/onlinedocs/gcc/ARM-Options.html
If the selected floating-point hardware includes the NEON
extension (e.g. -mfpu=`neon'), note that floating-point
operations will not be used by GCC's auto-vectorization pass
unless -funsafe-math-optimizations is also specified. This is
because NEON hardware does not fully implement the IEEE 754
standard for floating-point arithmetic (in particular denormal
values are treated as zero), so the use of NEON instructions may
lead to a loss of precision.
Which as I read it means that it wont vectorise causing a possible
performance hit, although its debatable how much of difference in
performance there would be in practise.
I'll re-code the files correctly and try again without -funsafe and see
if the problem still persists.
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