only print build-info when string is filled

srsue/src/ue_base.cc

@@ -139,7 +139,9 @@ std::string ue_base::get_build_info()
 std::string ue_base::get_build_string()
 {
   std::stringstream ss;
+  if (get_build_mode() != "" && get_build_info() != "") {
     ss << "Built in " << get_build_mode() << " mode using " << get_build_info() << "." << std::endl;
+  }
   return ss.str();
 }