Function AddIpoptStrOption 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn AddIpoptStrOption(
    ipopt_problem: IpoptProblem,
    keyword: *const c_char,
    val: *const c_char,
) -> Bool

Port of IpStdCInterface.cpp:AddIpoptStrOption.

Safety

ipopt_problem must be a valid IpoptProblem. keyword and val must be valid NUL-terminated strings.