#
# This file is open source software, licensed to you under the terms
# of the Apache License, Version 2.0 (the "License").  See the NOTICE file
# distributed with this work for additional information regarding copyright
# ownership.  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.
#

#
# Copyright (C) 2018 Scylladb, Ltd.
#

include (CheckCXXSourceCompiles)
file (READ ${CMAKE_CURRENT_LIST_DIR}/code_tests/Concepts_test.cc _concepts_test_code)
set (CMAKE_REQUIRED_FLAGS -fconcepts)
check_cxx_source_compiles ("${_concepts_test_code}" Concepts_FOUND)
set (CMAKE_REQUIRED_FLAGS "")

if (Concepts_FOUND AND NOT (TARGET Concepts::concepts))
  set (CMAKE_REQUIRED_FLAGS -fconcepts)
  add_library (Concepts::concepts INTERFACE IMPORTED)

  set_target_properties (Concepts::concepts
    PROPERTIES
      INTERFACE_COMPILE_OPTIONS $<$<COMPILE_LANGUAGE:CXX>:-fconcepts>)
endif ()