message: Router check tool needs to be compiled with third-party extensions.
  Without this change `main` can't be found.
diff: @@ -12,7 +12,6 @@ envoy_package()
  envoy_cc_test_binary(
  name = "router_check_tool",
  - srcs = ["router_check.cc"],
  deps = [":router_check_main_lib"],
  )
  @@ -23,6 +22,7 @@ envoy_cc_test_library(
  "coverage.h",
  "router.cc",
  "router.h",
  + "router_check.cc",
  ],
  copts = ["-DHAVE_LONG_LONG"],
  external_deps = ["tclap"],
  