buildroot

config BR2_PACKAGE_FFTW

    bool "fftw"

    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

​

config BR2_PACKAGE_FFTW_USE_SSE

    bool

​

config BR2_PACKAGE_FFTW_USE_SSE2

    bool

​

config BR2_PACKAGE_FFTW_USE_NEON

    bool

​

choice

    prompt "fftw precision"

    default BR2_PACKAGE_FFTW_PRECISION_DOUBLE

    help

      Selects fftw precision

​

config BR2_PACKAGE_FFTW_PRECISION_SINGLE

    bool "single"

    select BR2_PACKAGE_FFTW_USE_SSE if BR2_X86_CPU_HAS_SSE

    select BR2_PACKAGE_FFTW_USE_SSE2 if BR2_X86_CPU_HAS_SSE2

    select BR2_PACKAGE_FFTW_USE_NEON if BR2_ARM_CPU_HAS_NEON && !BR2_ARM_SOFT_FLOAT

    help

      Compile fftw in single precision, i.e. use 'float' for floating

      point type.

​

config BR2_PACKAGE_FFTW_PRECISION_DOUBLE

    bool "double"

    select BR2_PACKAGE_FFTW_USE_SSE2 if BR2_X86_CPU_HAS_SSE2

    help

      Compile fftw in double precision (the default), i.e. use 'double'

      for floating point type.

​

config BR2_PACKAGE_FFTW_PRECISION_LONG_DOUBLE

    bool "long double"

    # long-double precision require long-double trigonometric routines

    depends on !(BR2_TOOLCHAIN_BUILDROOT_UCLIBC && \

        (BR2_arm || BR2_mips || BR2_mipsel))

    help

      Compile fftw in long double precision, i.e. use 'long double'

      for floating point type.

​

config BR2_PACKAGE_FFTW_PRECISION_QUAD

    bool "quad"

    # quad-precision needs to have a gcc with libquadmath

    depends on (BR2_i386 || BR2_x86_64) && BR2_USE_WCHAR

    help

      Compile fftw in quadruple precision, i.e. use '__float128' for

      floating point type.

​

endchoice