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# Copyright 2019 Peter Dimov
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE_1_0.txt or copy at http://boost.org/LICENSE_1_0.txt)
# This CMake configuration file, installed as part of the Boost build
# and installation procedure done by `b2 install`, provides support
# for find_package(Boost).
#
# It's roughly, but not perfectly, compatible with the behavior
# of find_package(Boost) as provided by FindBoost.cmake.
#
# A typical use might be
#
# find_package(Boost 1.70 REQUIRED COMPONENTS filesystem regex PATHS C:/Boost)
#
# On success, the above invocation would define the targets Boost::headers,
# Boost::filesystem and Boost::regex. Boost::headers represents all
# header-only libraries. An alias, Boost::boost, for Boost::headers is
# provided for compatibility.
#
# Since Boost libraries can coexist in many variants - 32/64 bit,
# static/dynamic runtime, debug/release, the following variables can be used
# to control which variant is chosen:
#
# Boost_USE_DEBUG_LIBS: When OFF, disables debug libraries.
# Boost_USE_RELEASE_LIBS: When OFF, disables release libraries.
# Boost_USE_STATIC_LIBS: When ON, uses static Boost libraries; when OFF,
# uses shared Boost libraries; when not set, the
# default is to use shared when BUILD_SHARED_LIBS is
# ON, static otherwise.
# Boost_USE_STATIC_RUNTIME: When ON, uses Boost libraries linked against the
# static runtime. The default is shared runtime.
# Boost_USE_DEBUG_RUNTIME: When ON, uses Boost libraries linked against the
# debug runtime. When OFF, against the release
# runtime. The default is to use either.
# Boost_COMPILER: The compiler that has been used to build Boost,
# such as vc141, gcc7, clang37. The default is
# determined from CMAKE_CXX_COMPILER_ID.
message(STATUS "Found Boost ${Boost_VERSION} at ${Boost_DIR}")
# Output requested configuration (f.ex. "REQUIRED COMPONENTS filesystem")
if(Boost_FIND_QUIETLY)
set(_BOOST_CONFIG "${_BOOST_CONFIG} QUIET")
endif()
if(Boost_FIND_REQUIRED)
set(_BOOST_CONFIG "${_BOOST_CONFIG} REQUIRED")
endif()
foreach(__boost_comp IN LISTS Boost_FIND_COMPONENTS)
if(${Boost_FIND_REQUIRED_${__boost_comp}})
list(APPEND _BOOST_COMPONENTS ${__boost_comp})
else()
list(APPEND _BOOST_OPTIONAL_COMPONENTS ${__boost_comp})
endif()
endforeach()
if(_BOOST_COMPONENTS)
set(_BOOST_CONFIG "${_BOOST_CONFIG} COMPONENTS ${_BOOST_COMPONENTS}")
endif()
if(_BOOST_OPTIONAL_COMPONENTS)
set(_BOOST_CONFIG "${_BOOST_CONFIG} OPTIONAL_COMPONENTS ${_BOOST_OPTIONAL_COMPONENTS}")
endif()
if(_BOOST_CONFIG)
message(STATUS " Requested configuration:${_BOOST_CONFIG}")
endif()
unset(_BOOST_CONFIG)
unset(_BOOST_COMPONENTS)
unset(_BOOST_OPTIONAL_COMPONENTS)
# find_dependency doesn't forward arguments until 3.9, so we have to roll our own
macro(boost_find_dependency dep req)
set(_BOOST_QUIET)
if(Boost_FIND_QUIETLY)
set(_BOOST_QUIET QUIET)
endif()
set(_BOOST_REQUIRED)
if(${req} AND Boost_FIND_REQUIRED)
set(_BOOST_REQUIRED REQUIRED)
endif()
get_filename_component(_BOOST_CMAKEDIR "${CMAKE_CURRENT_LIST_DIR}/../" ABSOLUTE)
if(Boost_DEBUG)
message(STATUS "BoostConfig: find_package(boost_${dep} ${Boost_VERSION} EXACT CONFIG ${_BOOST_REQUIRED} ${_BOOST_QUIET} HINTS ${_BOOST_CMAKEDIR})")
endif()
find_package(boost_${dep} ${Boost_VERSION} EXACT CONFIG ${_BOOST_REQUIRED} ${_BOOST_QUIET} HINTS ${_BOOST_CMAKEDIR})
string(TOUPPER ${dep} _BOOST_DEP)
set(Boost_${_BOOST_DEP}_FOUND ${boost_${dep}_FOUND})
unset(_BOOST_REQUIRED)
unset(_BOOST_QUIET)
unset(_BOOST_CMAKEDIR)
unset(_BOOST_DEP)
endmacro()
# Find boost_headers
boost_find_dependency(headers 1)
if(NOT boost_headers_FOUND)
set(Boost_FOUND 0)
set(Boost_NOT_FOUND_MESSAGE "A required dependency, boost_headers, has not been found.")
return()
endif()
# Find components
foreach(__boost_comp IN LISTS Boost_FIND_COMPONENTS)
boost_find_dependency(${__boost_comp} ${Boost_FIND_REQUIRED_${__boost_comp}})
endforeach()
# Compatibility targets
if(NOT TARGET Boost::boost)
add_library(Boost::boost INTERFACE IMPORTED)
set_property(TARGET Boost::boost APPEND PROPERTY INTERFACE_LINK_LIBRARIES Boost::headers)
# All Boost:: targets already disable autolink
add_library(Boost::diagnostic_definitions INTERFACE IMPORTED)
add_library(Boost::disable_autolinking INTERFACE IMPORTED)
add_library(Boost::dynamic_linking INTERFACE IMPORTED)
endif()
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