Add executorch-wheel-config.cmake

Author: larryliu0820

build/executorch-wheel-config.cmake

@@ -0,0 +1,40 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+
+# Config defining how CMake should find ExecuTorch package. CMake will search
+# for this file and find ExecuTorch package if it is installed. Typical usage
+# is:
+#
+# find_package(executorch REQUIRED)
+# -------
+#
+# Finds the ExecuTorch library
+#
+# This will define the following variables:
+#
+#   EXECUTORCH_FOUND        -- True if the system has the ExecuTorch library
+#   EXECUTORCH_INCLUDE_DIRS -- The include directories for ExecuTorch
+#   EXECUTORCH_LIBRARIES    -- Libraries to link against
+#
+cmake_minimum_required(VERSION 3.19)
+
+# Find prebuilt _portable_lib.so. This file should be installed under
+# <site-packages>/executorch/share/cmake
+find_library(_portable_lib_LIBRARY _portable_lib.so PATHS "${CMAKE_CURRENT_LIST_DIR}/../../extension/pybindings/")
+set(EXECUTORCH_LIBRARIES)
+set(EXECUTORCH_FOUND OFF)
+if(_portable_lib_LIBRARY)
+  set(EXECUTORCH_FOUND ON)
+  message(STATUS "ExecuTorch portable library is found at ${_portable_lib_LIBRARY}")
+  list(APPEND EXECUTORCH_LIBRARIES _portable_lib)
+  add_library(_portable_lib STATIC IMPORTED)
+  set(EXECUTORCH_INCLUDE_DIRS ${CMAKE_CURRENT_LIST_DIR}/include)
+  set_target_properties(_portable_lib PROPERTIES
+    IMPORTED_LOCATION "${_portable_lib_LIBRARY}"
+    INTERFACE_INCLUDE_DIRECTORIES "${EXECUTORCH_INCLUDE_DIRS}"
+    CXX_STANDARD 17
+  )
+endif()