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Old 29th November 2012, 11:20 PM   #11
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Join Date: Feb 2009
Location: Brisbane, Australia
Quote:
Originally Posted by tomhubboater View Post

Did anybody try on Beaglebone ?
I haven't, yet, I got distracted and forgot to come back to that experiment

Was planning on hooking the beaglebone up again this weekend so if I get a chance to play with it I'll post back here
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Old 30th November 2012, 02:34 PM   #12
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I have had dramas getting fftw to compile for beaglebone ... this might take longer for me to resolve than I'd expected.
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Old 30th November 2012, 03:50 PM   #13
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It seems likely the answers are all on this page:

Downloading and Building FFTW-ARM

I get further through the make with the 3.2.2-arm source posted on that page with compile configured with:

Code:
./configure --enable-single --enable-perf-events --enable-neon ARM_CPU_TYPE=cortex-a8
This was the only set of options I could get that would ensure cycle timers were used rather than estimated.

Currently make fails with the following messages:
Code:
libtool: compile:  gcc -std=gnu99 -DHAVE_CONFIG_H -I. -I.. -I../kernel -O3 -fomit-frame-pointer -fstrict-aliasing -ffast-math -mcpu=cortex-a8 -mfpu=neon -MT neon.lo -MD -MP -MF .deps/neon.Tpo -c neon.c -o neon.o
/tmp/cckMDuDi.s: Assembler messages:
/tmp/cckMDuDi.s:31: Error: bad instruction `vmov.f32 d0,#0.0'
make[3]: *** [neon.lo] Error 1
make[3]: Leaving directory `/home/root/fftw-3.2.2-arm/simd'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/root/fftw-3.2.2-arm/simd'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/root/fftw-3.2.2-arm'
make: *** [all] Error 2

At 2am here right now, I think troubleshooting this will be a job for the morning.
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