int bitsi4(int nbits, int mher, int iher, int mhin, int ihin) {
    void *fptr;
    int retval;

    fptr = dlsym(_Chdislin_handle, "bitsi4_chdl");
    if(fptr == NULL) {
        fprintf(_stderr, "Error: %s(): dlsym(): %s\n", __func__,  dlerror());
        return -1;
    }
    dlrunfun(fptr, &retval, bitsi4, nbits, mher, iher, mhin, ihin);
    return retval;
}