Extracted Boost library include paths collection to a CMake module.
Also, save the collected paths to a global property to avoid potentially scanning the filesystem in every library that needs these paths.
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# Copyright 2019 Mike Dev
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# Copyright 2020, 2021 Andrey Semashev
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# Copyright 2020-2022 Andrey Semashev
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#
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# Distributed under the Boost Software License, Version 1.0.
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# See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
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@ -20,28 +20,13 @@ set(BOOST_FILESYSTEM_DISABLE_GETRANDOM OFF CACHE BOOL "Disable usage of getrando
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set(BOOST_FILESYSTEM_DISABLE_ARC4RANDOM OFF CACHE BOOL "Disable usage of arc4random API in Boost.Filesystem")
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set(BOOST_FILESYSTEM_DISABLE_BCRYPT OFF CACHE BOOL "Disable usage of BCrypt API in Boost.Filesystem")
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# Generates a list of include paths for all Boost libraries in \a result variable. Uses unified Boost include tree, if available.
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function(generate_boost_include_paths result)
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if (IS_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/../../boost" AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/../../boost/version.hpp")
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set(${result} "${CMAKE_CURRENT_SOURCE_DIR}/../.." PARENT_SCOPE)
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return()
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endif()
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file(GLOB path_list LIST_DIRECTORIES True "${CMAKE_CURRENT_SOURCE_DIR}/../*")
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foreach(path IN LISTS path_list)
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if (IS_DIRECTORY "${path}/include")
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list(APPEND include_list "${path}/include")
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endif()
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endforeach()
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set(${result} ${include_list} PARENT_SCOPE)
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endfunction()
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# Note: We can't use the Boost::library targets in the configure checks as they may not yet be included
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# by the superproject when this CMakeLists.txt is included. We also don't want to hardcode include paths
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# of the needed libraries and their dependencies, recursively, as this is too fragile and requires maintenance.
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# Instead, we collect include paths of all libraries and use them in the configure checks. This works faster
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# if there is a unified Boost include tree in the filesystem (i.e. if `b2 headers` was run or we're in the
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# official monolithic Boost distribution tree).
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generate_boost_include_paths(BOOST_LIBRARY_INCLUDES)
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include(cmake/BoostLibraryIncludes.cmake)
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set(CMAKE_REQUIRED_INCLUDES "${CMAKE_CURRENT_SOURCE_DIR}/src" ${BOOST_LIBRARY_INCLUDES})
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# Copyright 2022 Andrey Semashev
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#
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# Distributed under the Boost Software License, Version 1.0.
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# See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt
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#
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# After including this module, BOOST_LIBRARY_INCLUDES variable is set to the list of include
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# directories for all Boost libraries. If the monolithic include directory is found, it is
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# used instead.
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if (NOT CMAKE_VERSION VERSION_LESS 3.10)
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include_guard()
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endif()
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# Generates a list of include paths for all Boost libraries in \a result variable. Uses unified Boost include tree, if available.
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function(generate_boost_include_paths result)
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if (IS_DIRECTORY "${CMAKE_CURRENT_LIST_DIR}/../../../boost" AND EXISTS "${CMAKE_CURRENT_LIST_DIR}/../../../boost/version.hpp")
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get_filename_component(include_dir "${CMAKE_CURRENT_LIST_DIR}/../../.." ABSOLUTE)
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set(${result} "${include_dir}" PARENT_SCOPE)
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return()
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endif()
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file(GLOB path_list LIST_DIRECTORIES True "${CMAKE_CURRENT_LIST_DIR}/../../../libs/*")
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foreach(path IN LISTS path_list)
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if (IS_DIRECTORY "${path}/include")
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get_filename_component(include_dir "${path}/include" ABSOLUTE)
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list(APPEND include_list "${include_dir}")
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endif()
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endforeach()
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set(${result} ${include_list} PARENT_SCOPE)
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endfunction()
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if (NOT DEFINED BOOST_LIBRARY_INCLUDES)
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generate_boost_include_paths(__BOOST_LIBRARY_INCLUDES)
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# Save the paths in a global property to avoid scanning the filesystem if this module is used in multiple libraries
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set(BOOST_LIBRARY_INCLUDES ${__BOOST_LIBRARY_INCLUDES} CACHE INTERNAL "List of all Boost library include paths")
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unset(__BOOST_LIBRARY_INCLUDES)
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# message(STATUS "Boost library includes: ${BOOST_LIBRARY_INCLUDES}")
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endif()
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