| 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 |
