feat: copy mingw runtime dlls to multiple output locations

Author: Nie Zhihe

.gnfiles/build/feature/ten_package.gni

@@ -391,6 +391,52 @@ template("ten_package") {
     }
   }
 
+  # For MinGW builds, automatically copy runtime DLLs to C++ packages
+  # This applies to: C++ extensions, python_addon_loader, and system packages
+  if (is_win && is_mingw && should_set_package_output_root_dir) {
+    # Only copy DLLs for packages that build native code (not Python/Go/Node.js only packages)
+    _should_copy_mingw_dlls = false
+
+    if (invoker.package_kind == "app") {
+      # Apps always need DLLs in bin/ directory (where the executable is)
+      if (defined(invoker.enable_build) && invoker.enable_build) {
+        _should_copy_mingw_dlls = true
+      }
+    } else if (invoker.package_kind == "addon_loader") {
+      # Addon loaders always need DLLs if they have enable_build
+      if (defined(invoker.enable_build) && invoker.enable_build) {
+        _should_copy_mingw_dlls = true
+      }
+    } else if (invoker.package_kind == "system") {
+      # System packages always need DLLs (they package native libraries)
+      _should_copy_mingw_dlls = true
+    } else if (invoker.package_kind == "extension") {
+      # For extensions, only copy if they have C++ sources and enable_build
+      if (defined(invoker.enable_build) && invoker.enable_build &&
+          defined(invoker.sources) && invoker.sources != []) {
+        _should_copy_mingw_dlls = true
+      }
+    }
+
+    if (_should_copy_mingw_dlls) {
+      import("//.gnfiles/build/toolchain/mingw/copy_runtime_dlls.gni")
+
+      # Default to lib/ directory, but apps use bin/
+      _mingw_dll_output_dir = "${package_output_root_dir}/lib"
+      if (invoker.package_kind == "app") {
+        _mingw_dll_output_dir = "${package_output_root_dir}/bin"
+      }
+
+      _copy_mingw_dlls_target = "${_target_name}_copy_mingw_dlls"
+      copy_mingw_runtime_dlls(_copy_mingw_dlls_target) {
+        output_dir = _mingw_dll_output_dir
+      }
+
+      # Add to package_deps so it's included in the main group
+      package_deps += [ ":${_copy_mingw_dlls_target}" ]
+    }
+  }
+
   group(_target_name) {
     if (defined(public_deps)) {
       public_deps += package_deps