check_c_source_compiles ("int main () {
                                        #if (defined(__HP_cc)  && (__HP_cc >= 0x061500)) || \\\\
                                            (defined(__HP_aCC) && (__HP_aCC >= 0x061500))
                                        return 0;
                                        #else
                                        stop_compile_here
                                        #endif
                                 }"
                                 PLIBSYS_HAS_HP_VISIBILITY
        )