suitesparse_ldl_sys
pub unsafe extern "C" fn ldl_l_symbolic( n: ldl_long, ap: *const ldl_long, ai: *const ldl_long, lp: *mut ldl_long, parent: *mut ldl_long, lnz: *mut ldl_long, flag: *mut ldl_long, p: *const ldl_long, pinv: *const ldl_long)