Function IpoptSolverKktSolve 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn IpoptSolverKktSolve(
    solver: IpoptSolver,
    rhs: *const Number,
    lhs: *mut Number,
) -> Bool

Solve K · lhs = rhs against the converged KKT factor. Both rhs and lhs are flat buffers of length IpoptSolverGetKktDim in the x || s || y_c || y_d || z_l || z_u || v_l || v_u packing.

Returns TRUE on success, FALSE if no factor is held or the back-solve fails.

Safety

rhs and lhs must point to buffers at least IpoptSolverGetKktDim doubles long.