Function lapacke::dsygv

pub unsafe fn dsygv(
    layout: Layout, 
    itype: i32, 
    jobz: u8, 
    uplo: u8, 
    n: i32, 
    a: &mut [f64], 
    lda: i32, 
    b: &mut [f64], 
    ldb: i32, 
    w: &mut [f64]
) -> i32