184 lines
7.0 KiB
CMake
184 lines
7.0 KiB
CMake
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# - Config file for the Libevent package
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# It defines the following variables
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# LIBEVENT_FOUND - true if libevent and all required components found on the system
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# LIBEVENT_xxx_FOUND - true if component xxx(see available components) found on the system
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# LIBEVENT_VERSION - libevent version in format Major.Minor.Patch
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# LIBEVENT_INCLUDE_DIRS - directories where libevent header is located.
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# LIBEVENT_INCLUDE_DIR - same as DIRS
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# LIBEVENT_LIBRARIES - libevent library to link against.
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# LIBEVENT_LIBRARY - same as LIBRARIES
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#
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# These variables are deprecated, don't use them.
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# LIBEVENT_STATIC_LIBRARIES - libraries to link against (archive/static)
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# LIBEVENT_SHARED_LIBRARIES - libraries to link against (shared)
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#
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# When you try to locate the libevent libraries, you should specify which components you want to use.
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# The following table lists all available components. If none is given, all imported targets will used.
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# core - the core functons of libevent
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# extra - extra functions, contains http, dns and rpc
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# pthreads - multiple threads for libevent, not exists on Windows
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# openssl - openssl support for libevent
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#
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# By default, the shared libraries of libevent will be found. To find the static ones instead,
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# you must set the LIBEVENT_STATIC_LINK variable to TRUE before calling find_package(Libevent ...).
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# If no component provided, all components will be used.
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# example:
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# set(LIBEVENT_STATIC_LINK TRUE)
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# find_package(Libevent 2.2 REQUIRED COMPONENTS core)
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# include_directories(${LIBEVENT_INCLUDE_DIRS}) # Can be omitted
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# target_link_libraries(myapp ${LIBEVENT_LIBRARIES})
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# or target_link_libraries(myapp libevent::core)
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#
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# find_package() can handle dependencies automatically. For example, given the 'openssl' component,
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# all dependencies (libevent_core, libssl, libcrypto and openssl include directories) will be found.
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set(CONFIG_FOR_INSTALL_TREE @CONFIG_FOR_INSTALL_TREE@)
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set(LIBEVENT_VERSION @EVENT_PACKAGE_VERSION@)
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# IMPORTED targets from LibeventTargets.cmake
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set(LIBEVENT_STATIC_LIBRARIES "@LIBEVENT_STATIC_LIBRARIES@")
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set(LIBEVENT_SHARED_LIBRARIES "@LIBEVENT_SHARED_LIBRARIES@")
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# Default to the same type as libevent was built:
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if(NOT DEFINED LIBEVENT_STATIC_LINK)
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set(LIBEVENT_STATIC_LINK NOT @EVENT_LIBRARY_SHARED@)
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endif()
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set(CMAKE_FIND_LIBRARY_SUFFIXES_SAVE "${CMAKE_FIND_LIBRARY_SUFFIXES}")
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if(${LIBEVENT_STATIC_LINK})
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set(_LIB_TYPE static)
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set(CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_STATIC_LIBRARY_SUFFIX})
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set(_AVAILABLE_LIBS "${LIBEVENT_STATIC_LIBRARIES}")
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else()
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set(_LIB_TYPE shared)
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set(CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_SHARED_LIBRARY_SUFFIX})
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set(_AVAILABLE_LIBS "${LIBEVENT_SHARED_LIBRARIES}")
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endif()
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# Get the path of the current file.
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get_filename_component(LIBEVENT_CMAKE_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)
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get_filename_component(_INSTALL_PREFIX "${LIBEVENT_CMAKE_DIR}/../../.." ABSOLUTE)
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macro(message_if_needed _flag _msg)
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if (NOT ${CMAKE_FIND_PACKAGE_NAME}_FIND_QUIETLY)
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message(${_flag} "${_msg}")
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endif()
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endmacro()
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macro(no_component_msg _comp)
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if(${CMAKE_FIND_PACKAGE_NAME}_FIND_REQUIRED_${_comp})
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set(pthreadlib)
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if(NOT WIN32)
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set(pthreadlib ", pthreads")
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endif()
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message(FATAL_ERROR "Your libevent library does not contain a ${_comp} component!\n"
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"The valid components are core, extra${pthreadlib} and openssl.")
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else()
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message_if_needed(WARNING "Your libevent library does not contain a ${_comp} component!")
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endif()
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endmacro()
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set(_EVENT_COMPONENTS)
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if(${CMAKE_FIND_PACKAGE_NAME}_FIND_COMPONENTS)
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list(REMOVE_DUPLICATES ${CMAKE_FIND_PACKAGE_NAME}_FIND_COMPONENTS)
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foreach(_comp ${${CMAKE_FIND_PACKAGE_NAME}_FIND_COMPONENTS})
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list(FIND _AVAILABLE_LIBS ${_comp} _INDEX)
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if(_INDEX GREATER -1)
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list(APPEND _EVENT_COMPONENTS ${_comp})
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else()
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no_component_msg(${_comp})
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endif()
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endforeach()
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else()
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set(_EVENT_COMPONENTS ${_AVAILABLE_LIBS})
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endif()
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set(_POSSIBLE_PKG_NAMES)
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list(APPEND _POSSIBLE_PKG_NAMES ${CMAKE_FIND_PACKAGE_NAME} LIBEVENT Libevent libevent)
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list(REMOVE_DUPLICATES _POSSIBLE_PKG_NAMES)
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macro(set_case_insensitive_found _comp)
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foreach(name ${_POSSIBLE_PKG_NAMES})
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if("${_comp}" STREQUAL "")
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set(${name}_FOUND TRUE)
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set(${name}_NOTFOUND FALSE)
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else()
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set(${name}_${_comp}_FOUND TRUE)
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set(${name}_${_comp}_NOTFOUND FALSE)
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endif()
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endforeach()
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endmacro()
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if(CONFIG_FOR_INSTALL_TREE)
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## Config for install tree ----------------------------------------
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# Find includes
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unset(_event_h CACHE)
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find_path(_event_h
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NAMES event2/event.h
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PATHS "${_INSTALL_PREFIX}/include"
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NO_DEFAULT_PATH)
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if(_event_h)
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set(LIBEVENT_INCLUDE_DIRS "${_event_h}")
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message_if_needed(STATUS "Found libevent include directory: ${_event_h}")
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else()
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message_if_needed(WARNING "Your libevent library does not contain header files!")
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endif()
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# Find libraries
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macro(find_event_lib _comp)
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unset(_event_lib CACHE)
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find_library(_event_lib
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NAMES "event_${_comp}"
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PATHS "${_INSTALL_PREFIX}/lib"
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NO_DEFAULT_PATH)
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if(_event_lib)
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list(APPEND LIBEVENT_LIBRARIES "libevent::${_comp}")
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set_case_insensitive_found(${_comp})
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message_if_needed(STATUS "Found libevent component: ${_event_lib}")
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else()
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no_component_msg(${_comp})
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endif()
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endmacro()
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foreach(comp ${_EVENT_COMPONENTS})
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find_event_lib(${comp})
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endforeach()
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else()
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## Config for build tree ----------------------------------------
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set(LIBEVENT_INCLUDE_DIRS "@EVENT__INCLUDE_DIRS@")
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foreach(_comp ${_EVENT_COMPONENTS})
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list(APPEND LIBEVENT_LIBRARIES "libevent::${_comp}")
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set_case_insensitive_found(${_comp})
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endforeach()
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endif()
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set(LIBEVENT_INCLUDE_DIR ${LIBEVENT_INCLUDE_DIRS})
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if(LIBEVENT_LIBRARIES)
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set(LIBEVENT_LIBRARY ${LIBEVENT_LIBRARIES})
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if(CONFIG_FOR_INSTALL_TREE)
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message_if_needed(STATUS "Found libevent ${LIBEVENT_VERSION} in ${_INSTALL_PREFIX}")
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else()
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message_if_needed(STATUS "Found libevent ${LIBEVENT_VERSION} in ${LIBEVENT_CMAKE_DIR}")
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endif()
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# Avoid including targets more than one times
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if(NOT TARGET event_core_${_LIB_TYPE})
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# Include the project Targets file, this contains definitions for IMPORTED targets.
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include(${LIBEVENT_CMAKE_DIR}/LibeventTargets-${_LIB_TYPE}.cmake)
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endif()
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else()
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if(${CMAKE_FIND_PACKAGE_NAME}_FIND_REQUIRED)
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message(FATAL_ERROR "Can not find any libraries for libevent.")
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else()
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message_if_needed(WARNING "Can not find any libraries for libevent.")
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endif()
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endif()
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set(CMAKE_FIND_LIBRARY_SUFFIXES "${CMAKE_FIND_LIBRARY_SUFFIXES_SAVE}")
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unset(_LIB_TYPE)
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unset(_AVAILABLE_LIBS)
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unset(_EVENT_COMPONENTS)
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unset(_POSSIBLE_PKG_NAMES)
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unset(_INSTALL_PREFIX)
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