chore: import upstream snapshot with attribution

cmake/modules/ImportDL.cmake

@@ -0,0 +1,33 @@
+# SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+include_guard()
+
+if(NOT TARGET dl)
+    # libdl is included in the system library on Windows and QNX.
+    if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
+        find_library(DL_LIB_PATH
+            NAMES ${CMAKE_DL_LIBS}
+            REQUIRED
+        )
+
+        message(STATUS "Creating imported target 'dl' for ${DL_LIB_PATH}")
+        add_library(dl SHARED IMPORTED)
+        set_target_properties(dl PROPERTIES IMPORTED_LOCATION "${DL_LIB_PATH}")
+    else()
+        message(STATUS "Creating no-op target 'dl' since libdl is not available on this platform.")
+        add_library(dl INTERFACE) # Add a fake dl target so we can still call target_link_libraries without error, even though it's a no-op.
+    endif()
+endif()