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- config BR2_PACKAGE_FFTW
- bool "fftw"
- select BR2_PACKAGE_FFTW_DOUBLE if !BR2_PACKAGE_FFTW_SINGLE \
- && !BR2_PACKAGE_FFTW_LONG_DOUBLE && !BR2_PACKAGE_FFTW_QUAD
- help
- Library for computing Fast Fourier Transforms.
- This library computes Fast Fourier Transforms (FFT) in one
- or more dimensions. It is extremely fast. This package
- contains the shared library version of the fftw libraries in
- double precision.
- http://www.fftw.org
- if BR2_PACKAGE_FFTW
- source "package/fftw/fftw-single/Config.in"
- source "package/fftw/fftw-double/Config.in"
- source "package/fftw/fftw-long-double/Config.in"
- source "package/fftw/fftw-quad/Config.in"
- config BR2_PACKAGE_FFTW_FAST
- bool "optimise for speed over accuracy"
- help
- Optimise for fast math functions, at the expense of accuracy.
- Say 'y' if you need speed and can live with inaccuracies in
- the results. Say 'n' (the default) if accuracy is of utmost
- importance.
- This basically uses gcc's -Ofast optimisation level, which in
- turn is basically using gcc's -ffast-math. See the gcc manual
- for what this means.
- endif
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