FindBoost: Add imported targets
Targets include: - Boost::boost: Target for header-only dependencies - Boost::<C>: Target for specific component dependency - Boost::diagnostic_definitions: adds BOOST_LIB_DIAGNOSTIC - Boost::disable_autolinking: adds BOOST_ALL_NO_LIB - Boost::dynamic_linking: adds BOOST_ALL_DYN_LINK
This commit is contained in:
Roger Leigh
Brad King
parent
01c80acdbd
commit
3f9b081f6e
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@ -54,6 +54,33 @@
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# Boost_<C>_LIBRARY_DEBUG - Component <C> library debug variant
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# Boost_<C>_LIBRARY_RELEASE - Component <C> library release variant
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#
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# The following :prop_tgt:`IMPORTED` targets are also defined::
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#
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# Boost::boost - Target for header-only dependencies
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# (Boost include directory)
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# Boost::<C> - Target for specific component dependency
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# (shared or static library); <C> is lower-
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# case
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# Boost::diagnostic_definitions - interface target to enable diagnostic
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# information about Boost's automatic linking
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# during compilation (adds BOOST_LIB_DIAGNOSTIC)
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# Boost::disable_autolinking - interface target to disable automatic
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# linking with MSVC (adds BOOST_ALL_NO_LIB)
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# Boost::dynamic_linking - interface target to enable dynamic linking
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# linking with MSVC (adds BOOST_ALL_DYN_LINK)
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#
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# Implicit dependencies such as Boost::filesystem requiring
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# Boost::system will be automatically detected and satisfied, even
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# if system is not specified when using find_package and if
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# Boost::system is not added to target_link_libraries. If using
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# Boost::thread, then Thread::Thread will also be added automatically.
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#
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# It is important to note that the imported targets behave differently
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# than variables created by this module: multiple calls to
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# find_package(Boost) in the same directory or sub-directories with
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# different options (e.g. static or shared) will not override the
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# values of the targets created by the first call.
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#
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# Users may set these hints or results as cache entries. Projects
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# should not read these entries directly but instead use the above
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# result variables. Note that some hint names start in upper-case
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@ -142,6 +169,14 @@
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# add_executable(foo foo.cc)
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# endif()
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#
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# Example to find Boost libraries and use imported targets::
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#
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# find_package(Boost 1.56 REQUIRED COMPONENTS
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# date_time filesystem iostreams)
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# add_executable(foo foo.cc)
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# target_link_libraries(foo Boost::date_time Boost::filesystem
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# Boost::iostreams)
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#
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# Example to find Boost headers and some *static* libraries::
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#
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# set(Boost_USE_STATIC_LIBS ON) # only find static libs
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@ -822,6 +857,16 @@ if(Boost_DEBUG)
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"Boost_NO_SYSTEM_PATHS = ${Boost_NO_SYSTEM_PATHS}")
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endif()
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# Supply Boost_LIB_DIAGNOSTIC_DEFINITIONS as a convenience target. It
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# will only contain any interface definitions on WIN32, but is created
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# on all platforms to keep end user code free from platform dependent
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# code. Also provide convenience targets to disable autolinking and
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# enable dynamic linking.
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if(NOT TARGET Boost::diagnostic_definitions)
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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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if(WIN32)
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# In windows, automatic linking is performed, so you do not have
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# to specify the libraries. If you are linking to a dynamic
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@ -841,6 +886,12 @@ if(WIN32)
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# code to emit a #pragma message each time a library is selected
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# for linking.
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set(Boost_LIB_DIAGNOSTIC_DEFINITIONS "-DBOOST_LIB_DIAGNOSTIC")
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set_target_properties(Boost::diagnostic_definitions PROPERTIES
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INTERFACE_COMPILE_DEFINITIONS "BOOST_LIB_DIAGNOSTIC")
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set_target_properties(Boost::disable_autolinking PROPERTIES
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INTERFACE_COMPILE_DEFINITIONS "BOOST_ALL_NO_LIB")
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set_target_properties(Boost::dynamic_linking PROPERTIES
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INTERFACE_COMPILE_DEFINITIONS "BOOST_ALL_DYN_LINK")
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endif()
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_Boost_CHECK_SPELLING(Boost_ROOT)
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@ -1243,6 +1294,13 @@ endif()
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# Add any missing components to the list.
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_Boost_MISSING_DEPENDENCIES(Boost_FIND_COMPONENTS)
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# If thread is required, get the thread libs as a dependency
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list(FIND Boost_FIND_COMPONENTS thread _Boost_THREAD_DEPENDENCY_LIBS)
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if(NOT _Boost_THREAD_DEPENDENCY_LIBS EQUAL -1)
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include(CMakeFindDependencyMacro)
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find_dependency(Threads)
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endif()
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# If the user changed any of our control inputs flush previous results.
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if(_Boost_CHANGE_LIBDIR OR _Boost_CHANGE_LIBNAME)
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foreach(COMPONENT ${_Boost_COMPONENTS_SEARCHED})
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@ -1485,6 +1543,70 @@ else()
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endforeach()
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endif()
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# ------------------------------------------------------------------------
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# Add imported targets
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# ------------------------------------------------------------------------
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if(Boost_FOUND AND _Boost_IMPORTED_TARGETS)
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# For header-only libraries
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if(NOT TARGET Boost::boost)
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add_library(Boost::boost INTERFACE IMPORTED)
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if(Boost_INCLUDE_DIRS)
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set_target_properties(Boost::boost PROPERTIES
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INTERFACE_INCLUDE_DIRECTORIES "${Boost_INCLUDE_DIRS}")
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endif()
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endif()
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foreach(COMPONENT ${Boost_FIND_COMPONENTS})
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if(NOT TARGET Boost::${COMPONENT})
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string(TOUPPER ${COMPONENT} UPPERCOMPONENT)
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if(Boost_${UPPERCOMPONENT}_FOUND)
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if(Boost_USE_STATIC_LIBS)
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add_library(Boost::${COMPONENT} STATIC IMPORTED)
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else()
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# Even if Boost_USE_STATIC_LIBS is OFF, we might have static
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# libraries as a result.
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add_library(Boost::${COMPONENT} UNKNOWN IMPORTED)
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endif()
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if(Boost_INCLUDE_DIRS)
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set_target_properties(Boost::${COMPONENT} PROPERTIES
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INTERFACE_INCLUDE_DIRECTORIES "${Boost_INCLUDE_DIRS}")
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endif()
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if(EXISTS "${Boost_${UPPERCOMPONENT}_LIBRARY}")
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set_target_properties(Boost::${COMPONENT} PROPERTIES
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IMPORTED_LINK_INTERFACE_LANGUAGES "CXX"
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IMPORTED_LOCATION "${Boost_${UPPERCOMPONENT}_LIBRARY}")
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endif()
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if(EXISTS "${Boost_${UPPERCOMPONENT}_LIBRARY_DEBUG}")
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set_property(TARGET Boost::${COMPONENT} APPEND PROPERTY
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IMPORTED_CONFIGURATIONS DEBUG)
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set_target_properties(Boost::${COMPONENT} PROPERTIES
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IMPORTED_LINK_INTERFACE_LANGUAGES_DEBUG "CXX"
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IMPORTED_LOCATION_DEBUG "${Boost_${UPPERCOMPONENT}_LIBRARY_DEBUG}")
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endif()
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if(EXISTS "${Boost_${UPPERCOMPONENT}_LIBRARY_RELEASE}")
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set_property(TARGET Boost::${COMPONENT} APPEND PROPERTY
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IMPORTED_CONFIGURATIONS RELEASE)
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set_target_properties(Boost::${COMPONENT} PROPERTIES
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IMPORTED_LINK_INTERFACE_LANGUAGES_RELEASE "CXX"
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IMPORTED_LOCATION_RELEASE "${Boost_${UPPERCOMPONENT}_LIBRARY_RELEASE}")
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endif()
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if(_Boost_${UPPERCOMPONENT}_DEPENDENCIES)
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unset(_Boost_${UPPERCOMPONENT}_TARGET_DEPENDENCIES)
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foreach(dep ${_Boost_${UPPERCOMPONENT}_DEPENDENCIES})
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list(APPEND _Boost_${UPPERCOMPONENT}_TARGET_DEPENDENCIES Boost::${dep})
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endforeach()
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if(COMPONENT STREQUAL "thread")
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list(APPEND _Boost_${UPPERCOMPONENT}_TARGET_DEPENDENCIES Threads::Threads)
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endif()
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set_target_properties(Boost::${COMPONENT} PROPERTIES
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INTERFACE_LINK_LIBRARIES "${_Boost_${UPPERCOMPONENT}_TARGET_DEPENDENCIES}")
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endif()
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endif()
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endif()
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endforeach()
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endif()
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# ------------------------------------------------------------------------
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# Notification to end user about what was found
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# ------------------------------------------------------------------------
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