# Copyright 2018 Slightech Co., Ltd. All rights reserved.
#
# 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: https://cmake.org/cmake/help/latest/command/include_guard.html

macro(cmake_include_guard)
  get_property(INCLUDE_GUARD GLOBAL PROPERTY "_INCLUDE_GUARD_${CMAKE_CURRENT_LIST_FILE}")
  if(INCLUDE_GUARD)
    return()
  endif()
  set_property(GLOBAL PROPERTY "_INCLUDE_GUARD_${CMAKE_CURRENT_LIST_FILE}" TRUE)
endmacro()
