diff options
Diffstat (limited to 'cmake/LibeventConfig.cmake.in')
| -rw-r--r-- | cmake/LibeventConfig.cmake.in | 181 |
1 files changed, 173 insertions, 8 deletions
diff --git a/cmake/LibeventConfig.cmake.in b/cmake/LibeventConfig.cmake.in index 54223360..7b808c32 100644 --- a/cmake/LibeventConfig.cmake.in +++ b/cmake/LibeventConfig.cmake.in @@ -1,18 +1,183 @@ # - Config file for the Libevent package # It defines the following variables -# LIBEVENT_INCLUDE_DIRS - include directories +# LIBEVENT_FOUND - true if libevent and all required components found on the system +# LIBEVENT_xxx_FOUND - true if component xxx(see available components) found on the system +# LIBEVENT_VERSION - libevent version in format Major.Minor.Patch +# LIBEVENT_INCLUDE_DIRS - directories where libevent header is located. +# LIBEVENT_INCLUDE_DIR - same as DIRS +# LIBEVENT_LIBRARIES - libevent library to link against. +# LIBEVENT_LIBRARY - same as LIBRARIES +# +# These variables are deprecated, don't use them. # LIBEVENT_STATIC_LIBRARIES - libraries to link against (archive/static) # LIBEVENT_SHARED_LIBRARIES - libraries to link against (shared) +# +# When you try to locate the libevent libraries, you should specify which components you want to use. +# The following table lists all available components. If none is given, all imported targets will used. +# core - the core functons of libevent +# extra - extra functions, contains http, dns and rpc +# pthreads - multiple threads for libevent, not exists on Windows +# openssl - openssl support for libevent +# +# By default, the shared libraries of libevent will be found. To find the static ones instead, +# you must set the LIBEVENT_STATIC_LINK variable to TRUE before calling find_package(Libevent ...). +# If no component provided, all components will be used. +# example: +# set(LIBEVENT_STATIC_LINK TRUE) +# find_package(Libevent 2.2 REQUIRED COMPONENTS core) +# include_directories(${LIBEVENT_INCLUDE_DIRS}) # Can be omitted +# target_link_libraries(myapp ${LIBEVENT_LIBRARIES}) +# or target_link_libraries(myapp libevent::core) +# +# find_package() can handle dependencies automatically. For example, given the 'openssl' component, +# all dependencies (libevent_core, libssl, libcrypto and openssl include directories) will be found. -# Get the path of the current file. -get_filename_component(LIBEVENT_CMAKE_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH) - -# Set the include directories. -set(LIBEVENT_INCLUDE_DIRS "@EVENT_INSTALL_INCLUDE_DIR@") +set(CONFIG_FOR_INSTALL_TREE @CONFIG_FOR_INSTALL_TREE@) -# Include the project Targets file, this contains definitions for IMPORTED targets. -include(${LIBEVENT_CMAKE_DIR}/LibeventTargets.cmake) +set(LIBEVENT_VERSION @EVENT_PACKAGE_VERSION@) # IMPORTED targets from LibeventTargets.cmake set(LIBEVENT_STATIC_LIBRARIES "@LIBEVENT_STATIC_LIBRARIES@") set(LIBEVENT_SHARED_LIBRARIES "@LIBEVENT_SHARED_LIBRARIES@") + +# Default to the same type as libevent was built: +if(NOT DEFINED LIBEVENT_STATIC_LINK) + set(LIBEVENT_STATIC_LINK NOT @EVENT_LIBRARY_SHARED@) +endif() + +set(CMAKE_FIND_LIBRARY_SUFFIXES_SAVE "${CMAKE_FIND_LIBRARY_SUFFIXES}") +if(${LIBEVENT_STATIC_LINK}) + set(_LIB_TYPE static) + set(CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_STATIC_LIBRARY_SUFFIX}) + set(_AVAILABLE_LIBS "${LIBEVENT_STATIC_LIBRARIES}") +else() + set(_LIB_TYPE shared) + set(CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_SHARED_LIBRARY_SUFFIX}) + set(_AVAILABLE_LIBS "${LIBEVENT_SHARED_LIBRARIES}") +endif() + +# Get the path of the current file. +get_filename_component(LIBEVENT_CMAKE_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH) +get_filename_component(_INSTALL_PREFIX "${LIBEVENT_CMAKE_DIR}/../../.." ABSOLUTE) + +macro(message_if_needed _flag _msg) + if (NOT ${CMAKE_FIND_PACKAGE_NAME}_FIND_QUIETLY) + message(${_flag} "${_msg}") + endif() +endmacro() + +macro(no_component_msg _comp) + if(${CMAKE_FIND_PACKAGE_NAME}_FIND_REQUIRED_${_comp}) + set(pthreadlib) + if(NOT WIN32) + set(pthreadlib ", pthreads") + endif() + message(FATAL_ERROR "Your libevent library does not contain a ${_comp} component!\n" + "The valid components are core, extra${pthreadlib} and openssl.") + else() + message_if_needed(WARNING "Your libevent library does not contain a ${_comp} component!") + endif() +endmacro() + +set(_EVENT_COMPONENTS) +if(${CMAKE_FIND_PACKAGE_NAME}_FIND_COMPONENTS) + list(REMOVE_DUPLICATES ${CMAKE_FIND_PACKAGE_NAME}_FIND_COMPONENTS) + foreach(_comp ${${CMAKE_FIND_PACKAGE_NAME}_FIND_COMPONENTS}) + list(FIND _AVAILABLE_LIBS ${_comp} _INDEX) + if(_INDEX GREATER -1) + list(APPEND _EVENT_COMPONENTS ${_comp}) + else() + no_component_msg(${_comp}) + endif() + endforeach() +else() + set(_EVENT_COMPONENTS ${_AVAILABLE_LIBS}) +endif() + +set(_POSSIBLE_PKG_NAMES) +list(APPEND _POSSIBLE_PKG_NAMES ${CMAKE_FIND_PACKAGE_NAME} LIBEVENT Libevent libevent) +list(REMOVE_DUPLICATES _POSSIBLE_PKG_NAMES) + +macro(set_case_insensitive_found _comp) + foreach(name ${_POSSIBLE_PKG_NAMES}) + if("${_comp}" STREQUAL "") + set(${name}_FOUND TRUE) + set(${name}_NOTFOUND FALSE) + else() + set(${name}_${_comp}_FOUND TRUE) + set(${name}_${_comp}_NOTFOUND FALSE) + endif() + endforeach() +endmacro() + +if(CONFIG_FOR_INSTALL_TREE) + ## Config for install tree ---------------------------------------- + # Find includes + unset(_event_h CACHE) + find_path(_event_h + NAMES event2/event.h + PATHS "${_INSTALL_PREFIX}/include" + NO_DEFAULT_PATH) + if(_event_h) + set(LIBEVENT_INCLUDE_DIRS "${_event_h}") + message_if_needed(STATUS "Found libevent include directory: ${_event_h}") + else() + message_if_needed(WARNING "Your libevent library does not contain header files!") + endif() + + # Find libraries + macro(find_event_lib _comp) + unset(_event_lib CACHE) + find_library(_event_lib + NAMES "event_${_comp}" + PATHS "${_INSTALL_PREFIX}/lib" + NO_DEFAULT_PATH) + if(_event_lib) + list(APPEND LIBEVENT_LIBRARIES "libevent::${_comp}") + set_case_insensitive_found(${_comp}) + message_if_needed(STATUS "Found libevent component: ${_event_lib}") + else() + no_component_msg(${_comp}) + endif() + endmacro() + + foreach(comp ${_EVENT_COMPONENTS}) + find_event_lib(${comp}) + endforeach() +else() + ## Config for build tree ---------------------------------------- + set(LIBEVENT_INCLUDE_DIRS "@EVENT__INCLUDE_DIRS@") + foreach(_comp ${_EVENT_COMPONENTS}) + list(APPEND LIBEVENT_LIBRARIES "libevent::${_comp}") + set_case_insensitive_found(${_comp}) + endforeach() +endif() + +set(LIBEVENT_INCLUDE_DIR ${LIBEVENT_INCLUDE_DIRS}) +if(LIBEVENT_LIBRARIES) + set(LIBEVENT_LIBRARY ${LIBEVENT_LIBRARIES}) + if(CONFIG_FOR_INSTALL_TREE) + message_if_needed(STATUS "Found libevent ${LIBEVENT_VERSION} in ${_INSTALL_PREFIX}") + else() + message_if_needed(STATUS "Found libevent ${LIBEVENT_VERSION} in ${LIBEVENT_CMAKE_DIR}") + endif() + + # Avoid including targets more than one times + if(NOT TARGET event_core_${_LIB_TYPE}) + # Include the project Targets file, this contains definitions for IMPORTED targets. + include(${LIBEVENT_CMAKE_DIR}/LibeventTargets-${_LIB_TYPE}.cmake) + endif() +else() + if(${CMAKE_FIND_PACKAGE_NAME}_FIND_REQUIRED) + message(FATAL_ERROR "Can not find any libraries for libevent.") + else() + message_if_needed(WARNING "Can not find any libraries for libevent.") + endif() +endif() + +set(CMAKE_FIND_LIBRARY_SUFFIXES "${CMAKE_FIND_LIBRARY_SUFFIXES_SAVE}") +unset(_LIB_TYPE) +unset(_AVAILABLE_LIBS) +unset(_EVENT_COMPONENTS) +unset(_POSSIBLE_PKG_NAMES) +unset(_INSTALL_PREFIX) |