add no tensorrt warning (#33874)

paddle/fluid/platform/dynload/tensorrt.cc

@@ -43,8 +43,17 @@ void* GetDsoHandle(const std::string& dso_name) {
   if (nullptr == dso_handle) {
     auto error_msg =
         "You are using Paddle compiled with TensorRT, but TensorRT dynamic "
-        "library is not found. Ignore this if TensorRT is not needed.\n";
-    std::cerr << error_msg;
+        "library is not found. Ignore this if TensorRT is not needed.\n"
+        "The TensorRT that Paddle depends on is not configured correctly.\n"
+        "  Suggestions:\n"
+        "  1. Check if the TensorRT is installed correctly and its version"
+        " is matched with paddlepaddle you installed.\n"
+        "  2. Configure environment variables as "
+        "follows:\n"
+        "  - Linux: set LD_LIBRARY_PATH by `export LD_LIBRARY_PATH=...`\n"
+        "  - Windows: set PATH by `set PATH=XXX;%PATH%`\n"
+        "  - Mac: set  DYLD_LIBRARY_PATH by `export DYLD_LIBRARY_PATH=...`\n";
+    LOG(WARNING) << error_msg;
   }
   return dso_handle;
 }