Function guile_sys::scm_string_compare_ci

pub unsafe extern "C" fn scm_string_compare_ci(
    s1: SCM, 
    s2: SCM, 
    proc_lt: SCM, 
    proc_eq: SCM, 
    proc_gt: SCM, 
    start1: SCM, 
    end1: SCM, 
    start2: SCM, 
    end2: SCM
) -> SCM