[AOTInductor] Refine error message for dlopen in AOTInductor (#149812)

Summary:
Refine the error message if dlopen failed in AOTInductor.
The original error message was ominous, modified to recommend user to
rebuild AOTInductor if needed, otherwise it's fine.

Test Plan:
None. Error message change.

Reviewers:

Subscribers:

Tasks:

Tags:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/149812
Approved by: https://github.com/chenyang78, https://github.com/jingsh

torch/csrc/inductor/aoti_runner/model_container_runner.cpp

@@ -73,11 +73,15 @@ AOTIModelContainerRunner::AOTIModelContainerRunner(
 #undef LOAD_SYMBOL
 
 // NOLINTBEGIN(performance-avoid-endl)
-#define TRY_LOAD_SYMBOL(var, name_str)                               \
-  try {                                                              \
-    var = reinterpret_cast<decltype(var)>(model_so_->sym(name_str)); \
-  } catch (const at::DynamicLibraryError& e) {                       \
-    std::cerr << "Could not dlsym " << name_str << std::endl;        \
+#define TRY_LOAD_SYMBOL(var, name_str)                                               \
+  try {                                                                              \
+    var = reinterpret_cast<decltype(var)>(model_so_->sym(name_str));                 \
+  } catch (const at::DynamicLibraryError& e) {                                       \
+    std::cerr                                                                        \
+        << "[WARNING] Could not dlsym " << name_str                                  \
+        << ". This is okay if you don't need functionality from " << name_str        \
+        << ". Otherwise consider rebuilding your model with the latest AOTInductor." \
+        << std::endl;                                                                \
   }
   // NOLINTEND(performance-avoid-endl)