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79 lines
3.1 KiB
79 lines
3.1 KiB
# Copyright (c) 2023-present The Bitcoin Core developers
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# Distributed under the MIT software license, see the accompanying
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# file COPYING or https://opensource.org/license/mit/.
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function(add_boost_if_needed)
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#[=[
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TODO: Not all targets, which will be added in the future, require
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Boost. Therefore, a proper check will be appropriate here.
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Implementation notes:
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Although only Boost headers are used to build Bitcoin Core,
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we still leverage a standard CMake's approach to handle
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dependencies, i.e., the Boost::headers "library".
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A command target_link_libraries(target PRIVATE Boost::headers)
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will propagate Boost::headers usage requirements to the target.
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For Boost::headers such usage requirements is an include
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directory and other added INTERFACE properties.
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]=]
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# We cannot rely on find_package(Boost ...) to work properly without
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# Boost_NO_BOOST_CMAKE set until we require a more recent Boost because
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# upstream did not ship proper CMake files until 1.82.0.
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# Until then, we rely on CMake's FindBoost module.
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# See: https://cmake.org/cmake/help/latest/policy/CMP0167.html
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if(POLICY CMP0167)
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cmake_policy(SET CMP0167 OLD)
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endif()
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set(Boost_NO_BOOST_CMAKE ON)
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find_package(Boost 1.73.0 REQUIRED)
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mark_as_advanced(Boost_INCLUDE_DIR)
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set_target_properties(Boost::headers PROPERTIES IMPORTED_GLOBAL TRUE)
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target_compile_definitions(Boost::headers INTERFACE
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# We don't use multi_index serialization.
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BOOST_MULTI_INDEX_DISABLE_SERIALIZATION
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)
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if(DEFINED VCPKG_TARGET_TRIPLET)
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# Workaround for https://github.com/microsoft/vcpkg/issues/36955.
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target_compile_definitions(Boost::headers INTERFACE
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BOOST_NO_USER_CONFIG
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)
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endif()
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# Prevent use of std::unary_function, which was removed in C++17,
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# and will generate warnings with newer compilers for Boost
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# older than 1.80.
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# See: https://github.com/boostorg/config/pull/430.
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set(CMAKE_REQUIRED_DEFINITIONS -DBOOST_NO_CXX98_FUNCTION_BASE)
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set(CMAKE_REQUIRED_INCLUDES ${Boost_INCLUDE_DIR})
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include(CMakePushCheckState)
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cmake_push_check_state()
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include(TryAppendCXXFlags)
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set(CMAKE_REQUIRED_FLAGS ${working_compiler_werror_flag})
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set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
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check_cxx_source_compiles("
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#include <boost/config.hpp>
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" NO_DIAGNOSTICS_BOOST_NO_CXX98_FUNCTION_BASE
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)
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cmake_pop_check_state()
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if(NO_DIAGNOSTICS_BOOST_NO_CXX98_FUNCTION_BASE)
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target_compile_definitions(Boost::headers INTERFACE
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BOOST_NO_CXX98_FUNCTION_BASE
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)
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else()
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set(CMAKE_REQUIRED_DEFINITIONS)
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endif()
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if(BUILD_TESTS)
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# Some package managers, such as vcpkg, vendor Boost.Test separately
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# from the rest of the headers, so we have to check for it individually.
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list(APPEND CMAKE_REQUIRED_DEFINITIONS -DBOOST_TEST_NO_MAIN)
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include(CheckIncludeFileCXX)
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check_include_file_cxx(boost/test/included/unit_test.hpp HAVE_BOOST_INCLUDED_UNIT_TEST_H)
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if(NOT HAVE_BOOST_INCLUDED_UNIT_TEST_H)
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message(FATAL_ERROR "Building test_bitcoin executable requested but boost/test/included/unit_test.hpp header not available.")
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endif()
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endif()
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endfunction()
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