feat: difftest framework

npc/csrc/Flow/config.cpp

@@ -9,13 +9,16 @@ void Config::cli_parse(int argc, char **argv) {
                "Memory file is in text format");
   app.add_flag("--trace", do_trace, "Enable tracing");
   app.add_option("--wav", wavefile, "output .vcd file path")
-      ->check([this](const std::string &) {
-        if (!this->do_trace)
+      ->check([=](const std::string &) {
+        if (!do_trace)
           throw CLI::ValidationError(
               "dependency", "You must turn on trace before specify wave file");
         return std::string();
       });
   app.add_option("-t", max_sim_time, "Max simulation timestep");
+  app.add_option("--diff-lib", lib_ref,
+                 "Dynamic library file of difftest reference")
+      ->check(CLI::ExistingFile);
 
   try {
     app.parse(argc, argv);