|  | # | 
|  | # Licensed to the Apache Software Foundation (ASF) under one | 
|  | # or more contributor license agreements. See the NOTICE file | 
|  | # distributed with this work for additional information | 
|  | # regarding copyright ownership. The ASF licenses this file | 
|  | # to you 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. | 
|  | # | 
|  |  | 
|  | set(BOOST_MINREV 1.56) | 
|  |  | 
|  | # we are not ready for the new style link targets introduced in | 
|  | # boost 1.70.0 and cmake 3.14.2 which showed up on appveyor in | 
|  | # mingw builds | 
|  | set(Boost_NO_BOOST_CMAKE ON) | 
|  |  | 
|  | macro(REQUIRE_BOOST_HEADERS) | 
|  | find_package(Boost ${BOOST_MINREV} QUIET REQUIRED) | 
|  | if (NOT Boost_FOUND) | 
|  | string(CONCAT fatal_message | 
|  | "Boost ${BOOST_MINREV} or later is required to build sources in ${CMAKE_CURRENT_SOURCE_DIR}") | 
|  | message(FATAL_ERROR, ${fatal_message}) | 
|  | endif() | 
|  | if (DEFINED Boost_INCLUDE_DIRS) | 
|  | # pre-boost 1.70.0 aware cmake, otherwise it is using targets | 
|  | include_directories(SYSTEM "${Boost_INCLUDE_DIRS}") | 
|  | endif() | 
|  | endmacro() | 
|  |  | 
|  | macro(REQUIRE_BOOST_LIBRARIES libs) | 
|  | message(STATUS "Locating boost libraries required by sources in ${CMAKE_CURRENT_SOURCE_DIR}") | 
|  | find_package(Boost ${BOOST_MINREV} REQUIRED COMPONENTS ${${libs}}) | 
|  | if (NOT Boost_FOUND) | 
|  | string(CONCAT fatal_message | 
|  | "Boost ${BOOST_MINREV} or later is required to build sources in ${CMAKE_CURRENT_SOURCE_DIR}, " | 
|  | "or use -DBUILD_TESTING=OFF") | 
|  | message(FATAL_ERROR, ${fatal_message}) | 
|  | endif() | 
|  | endmacro() |