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141 lines
4.5 KiB
141 lines
4.5 KiB
# Copyright 2019 Peter Dimov
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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://boost.org/LICENSE_1_0.txt)
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# This CMake configuration file, installed as part of the Boost build
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# and installation procedure done by `b2 install`, provides support
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# for find_package(Boost).
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#
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# It's roughly, but not perfectly, compatible with the behavior
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# of find_package(Boost) as provided by FindBoost.cmake.
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#
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# A typical use might be
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#
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# find_package(Boost 1.70 REQUIRED COMPONENTS filesystem regex PATHS C:/Boost)
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#
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# On success, the above invocation would define the targets Boost::headers,
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# Boost::filesystem and Boost::regex. Boost::headers represents all
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# header-only libraries. An alias, Boost::boost, for Boost::headers is
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# provided for compatibility.
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#
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# Since Boost libraries can coexist in many variants - 32/64 bit,
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# static/dynamic runtime, debug/release, the following variables can be used
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# to control which variant is chosen:
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#
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# Boost_USE_DEBUG_LIBS: When OFF, disables debug libraries.
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# Boost_USE_RELEASE_LIBS: When OFF, disables release libraries.
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# Boost_USE_STATIC_LIBS: When ON, uses static Boost libraries; when OFF,
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# uses shared Boost libraries; when not set, the
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# default is to use shared when BUILD_SHARED_LIBS is
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# ON, static otherwise.
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# Boost_USE_STATIC_RUNTIME: When ON, uses Boost libraries linked against the
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# static runtime. The default is shared runtime.
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# Boost_USE_DEBUG_RUNTIME: When ON, uses Boost libraries linked against the
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# debug runtime. When OFF, against the release
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# runtime. The default is to use either.
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# Boost_COMPILER: The compiler that has been used to build Boost,
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# such as vc141, gcc7, clang37. The default is
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# determined from CMAKE_CXX_COMPILER_ID.
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message(STATUS "Found Boost ${Boost_VERSION} at ${Boost_DIR}")
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# Output requested configuration (f.ex. "REQUIRED COMPONENTS filesystem")
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if(Boost_FIND_QUIETLY)
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set(_BOOST_CONFIG "${_BOOST_CONFIG} QUIET")
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endif()
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if(Boost_FIND_REQUIRED)
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set(_BOOST_CONFIG "${_BOOST_CONFIG} REQUIRED")
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endif()
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foreach(__boost_comp IN LISTS Boost_FIND_COMPONENTS)
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if(${Boost_FIND_REQUIRED_${__boost_comp}})
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list(APPEND _BOOST_COMPONENTS ${__boost_comp})
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else()
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list(APPEND _BOOST_OPTIONAL_COMPONENTS ${__boost_comp})
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endif()
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endforeach()
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if(_BOOST_COMPONENTS)
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set(_BOOST_CONFIG "${_BOOST_CONFIG} COMPONENTS ${_BOOST_COMPONENTS}")
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endif()
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if(_BOOST_OPTIONAL_COMPONENTS)
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set(_BOOST_CONFIG "${_BOOST_CONFIG} OPTIONAL_COMPONENTS ${_BOOST_OPTIONAL_COMPONENTS}")
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endif()
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if(_BOOST_CONFIG)
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message(STATUS " Requested configuration:${_BOOST_CONFIG}")
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endif()
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unset(_BOOST_CONFIG)
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unset(_BOOST_COMPONENTS)
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unset(_BOOST_OPTIONAL_COMPONENTS)
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# find_dependency doesn't forward arguments until 3.9, so we have to roll our own
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macro(boost_find_dependency dep req)
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set(_BOOST_QUIET)
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if(Boost_FIND_QUIETLY)
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set(_BOOST_QUIET QUIET)
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endif()
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set(_BOOST_REQUIRED)
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if(${req} AND Boost_FIND_REQUIRED)
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set(_BOOST_REQUIRED REQUIRED)
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endif()
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get_filename_component(_BOOST_CMAKEDIR "${CMAKE_CURRENT_LIST_DIR}/../" ABSOLUTE)
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if(Boost_DEBUG)
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message(STATUS "BoostConfig: find_package(boost_${dep} ${Boost_VERSION} EXACT CONFIG ${_BOOST_REQUIRED} ${_BOOST_QUIET} HINTS ${_BOOST_CMAKEDIR})")
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endif()
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find_package(boost_${dep} ${Boost_VERSION} EXACT CONFIG ${_BOOST_REQUIRED} ${_BOOST_QUIET} HINTS ${_BOOST_CMAKEDIR})
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string(TOUPPER ${dep} _BOOST_DEP)
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set(Boost_${_BOOST_DEP}_FOUND ${boost_${dep}_FOUND})
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unset(_BOOST_REQUIRED)
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unset(_BOOST_QUIET)
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unset(_BOOST_CMAKEDIR)
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unset(_BOOST_DEP)
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endmacro()
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# Find boost_headers
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boost_find_dependency(headers 1)
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if(NOT boost_headers_FOUND)
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set(Boost_FOUND 0)
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set(Boost_NOT_FOUND_MESSAGE "A required dependency, boost_headers, has not been found.")
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return()
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endif()
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# Find components
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foreach(__boost_comp IN LISTS Boost_FIND_COMPONENTS)
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boost_find_dependency(${__boost_comp} ${Boost_FIND_REQUIRED_${__boost_comp}})
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endforeach()
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# Compatibility targets
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if(NOT TARGET Boost::boost)
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add_library(Boost::boost INTERFACE IMPORTED)
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set_property(TARGET Boost::boost APPEND PROPERTY INTERFACE_LINK_LIBRARIES Boost::headers)
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# All Boost:: targets already disable autolink
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add_library(Boost::diagnostic_definitions INTERFACE IMPORTED)
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add_library(Boost::disable_autolinking INTERFACE IMPORTED)
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add_library(Boost::dynamic_linking INTERFACE IMPORTED)
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endif()
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