Function gsl_sys::gsl_fft_real_transform

pub unsafe extern "C" fn gsl_fft_real_transform(
    data: *mut f64, 
    stride: usize, 
    n: usize, 
    wavetable: *const gsl_fft_real_wavetable, 
    work: *mut gsl_fft_real_workspace
) -> c_int