pub unsafe extern "C" fn gsl_fft_complex_float_radix2_dif_backward(
data: gsl_complex_packed_array_float,
stride: usize,
n: usize
) -> c_int
pub unsafe extern "C" fn gsl_fft_complex_float_radix2_dif_backward(
data: gsl_complex_packed_array_float,
stride: usize,
n: usize
) -> c_int