[Buildroot] FFTW optimized for ARM and NEON FPU

Tue Feb 24 03:57:08 UTC 2015

Hello,

I am working on a cortex-a9 (zynq SoC, mainly zc706)
I faced fairly slow computations of FFT using this library with the 
default configuration (20MFlops).

I modified package/fftw.mk to optimize the library compilation as long 
as an FPU is available,
NEON in this case: this increased the number of MFlops to 500-600.

-- 
guillaume william bres-saix
software engineer
NIST - Time & Frequency div.
325 Broadway, Boulder, CO 80305.

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