Function scsrlsvqr 

pub unsafe fn scsrlsvqr(
    handle: &SpHandle,
    m: i32,
    nnz: i32,
    descr_a: *mut c_void,
    csr_val: *const f32,
    csr_row_ptr: *const c_int,
    csr_col_ind: *const c_int,
    b: *const f32,
    tol: f32,
    reorder: i32,
    x: *mut f32,
    singularity: *mut c_int,
) -> Result<()>

Sparse QR solve (least-squares, handles non-SPD systems).

Safety

Same as scsrlsvchol.