| # Licensed to the Apache Software Foundation (ASF) under one or more |
| # contributor license agreements. See the NOTICE file distributed with |
| # this work for additional information regarding copyright ownership. |
| # The ASF licenses this file to You under the Apache License, Version 2.0 |
| # (the "License"); you may not use this file except in compliance with |
| # the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| # - Try to find libevent |
| #.rst |
| # FindLibevent |
| # ------------ |
| # |
| # Find Libevent include directories and libraries. Invoke as:: |
| # |
| # find_package(Libevent |
| # [version] [EXACT] # Minimum or exact version |
| # [REQUIRED] # Fail if Libevent is not found |
| # [COMPONENT <C>...]) # Libraries to look for |
| # |
| # Valid components are one or more of:: libevent core extra pthreads openssl. |
| # Note that 'libevent' contains both core and extra. You must specify one of |
| # them for the other components. |
| # |
| # This module will define the following variables:: |
| # |
| # LIBEVENT_FOUND - True if headers and requested libraries were found |
| # LIBEVENT_INCLUDE_DIRS - Libevent include directories |
| # LIBEVENT_LIBRARIES - Libevent libraries to be linked |
| # LIBEVENT_<C>_FOUND - Component <C> was found (<C> is uppercase) |
| # LIBEVENT_<C>_LIBRARY - Library to be linked for Libevent component <C>. |
| |
| find_package(PkgConfig QUIET) |
| pkg_check_modules(PC_LIBEVENT QUIET libevent) |
| |
| # Support preference of static libs by adjusting CMAKE_FIND_LIBRARY_SUFFIXES |
| if( Libevent_USE_STATIC_LIBS ) |
| set(_libevent_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES :${CMAKE_FIND_LIBRARY_SUFFIXES}) |
| if(WIN32) |
| list(INSERT CMAKE_FIND_LIBRARY_SUFFIXES 0 .lib .a) |
| else() |
| set(CMAKE_FIND_LIBRARY_SUFFIXES .a) |
| endif() |
| else() |
| set(_libevent_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES :${CMAKE_FIND_LIBRARY_SUFFIXES}) |
| if(WIN32) |
| list(INSERT CMAKE_FIND_LIBRARY_SUFFIXES 0 .dll .so) |
| else() |
| set(CMAKE_FIND_LIBRARY_SUFFIXES .so) |
| endif() |
| endif() |
| # Look for the Libevent 2.0 or 1.4 headers |
| find_path(LIBEVENT_INCLUDE_DIR |
| NAMES |
| WIN32-Code/event2/event-config.h |
| event2/event-config.h |
| event-config.h |
| PATHS ${CMAKE_SOURCE_DIR}/bin/include C:/libevent/include ${CMAKE_SOURCE_DIR}/win32-deps/include |
| HINTS |
| ${PC_LIBEVENT_INCLUDE_DIRS} |
| ) |
| |
| # ------------------------------------------------------------------------ |
| # Prefix initialization |
| # ------------------------------------------------------------------------ |
| set(Libevent_LIB_PREFIX "") |
| set(LIBEVENT_EVENT_CONFIG_DIR ${LIBEVENT_INCLUDE_DIR}) |
| if(WIN32) |
| set(Libevent_LIB_PREFIX "lib") |
| set(LIBEVENT_EVENT_CONFIG_DIR "${LIBEVENT_INCLUDE_DIR}/../WIN32-Code/") |
| endif() |
| |
| if(LIBEVENT_INCLUDE_DIR) |
| set(_version_regex "^#define[ \t]+_EVENT_VERSION[ \t]+\"([^\"]+)\".*") |
| if(EXISTS "${LIBEVENT_EVENT_CONFIG_DIR}/event2/event-config.h") |
| # Libevent 2.0 |
| file(STRINGS "${LIBEVENT_EVENT_CONFIG_DIR}/event2/event-config.h" |
| LIBEVENT_VERSION REGEX "${_version_regex}") |
| else() |
| # Libevent 1.4 |
| if(EXISTS "${LIBEVENT_EVENT_CONFIG_DIR}/event-config.h") |
| file(STRINGS "${LIBEVENT_EVENT_CONFIG_DIR}/event-config.h" |
| LIBEVENT_VERSION REGEX "${_version_regex}") |
| endif() |
| endif() |
| string(REGEX REPLACE "${_version_regex}" "\\1" |
| LIBEVENT_VERSION "${LIBEVENT_VERSION}") |
| unset(_version_regex) |
| endif() |
| |
| set(_LIBEVENT_REQUIRED_VARS) |
| if(WIN32) |
| set(Libevent_FIND_COMPONENTS ${Libevent_LIB_PREFIX}event core extras) |
| else() |
| set(Libevent_FIND_COMPONENTS ${Libevent_LIB_PREFIX}event core extra pthreads) |
| endif() |
| message(status "** libevent components: ${Libevent_FIND_COMPONENTS}") |
| foreach(COMPONENT ${Libevent_FIND_COMPONENTS}) |
| set(_LIBEVENT_LIBNAME "${Libevent_LIB_PREFIX}event") |
| # Note: compare two variables to avoid a CMP0054 policy warning |
| if(COMPONENT STREQUAL _LIBEVENT_LIBNAME) |
| set(_LIBEVENT_LIBNAME "${Libevent_LIB_PREFIX}event") |
| else() |
| set(_LIBEVENT_LIBNAME "${Libevent_LIB_PREFIX}event_${COMPONENT}") |
| endif() |
| string(TOUPPER "${COMPONENT}" COMPONENT_UPPER) |
| message(status "** ${_LIBEVENT_LIBNAME}") |
| find_library(LIBEVENT_${COMPONENT_UPPER}_LIBRARY |
| NAMES ${_LIBEVENT_LIBNAME} |
| PATHS ${CMAKE_SOURCE_DIR}/bin/lib C:/libevent-2.0.22-stable C:/libevent-2.0.22-stable/lib C:/libevent/lib ${CMAKE_SOURCE_DIR}/win32-deps/lib |
| HINTS ${PC_LIBEVENT_LIBRARY_DIRS} |
| ) |
| if(LIBEVENT_${COMPONENT_UPPER}_LIBRARY) |
| set(Libevent_${COMPONENT}_FOUND 1) |
| endif() |
| list(APPEND _LIBEVENT_REQUIRED_VARS LIBEVENT_${COMPONENT_UPPER}_LIBRARY) |
| endforeach() |
| unset(_LIBEVENT_LIBNAME) |
| |
| include(FindPackageHandleStandardArgs) |
| # handle the QUIETLY and REQUIRED arguments and set LIBEVENT_FOUND to TRUE |
| # if all listed variables are TRUE and the requested version matches. |
| find_package_handle_standard_args(Libevent REQUIRED_VARS |
| ${_LIBEVENT_REQUIRED_VARS} |
| LIBEVENT_INCLUDE_DIR |
| VERSION_VAR LIBEVENT_VERSION |
| HANDLE_COMPONENTS) |
| |
| if(LIBEVENT_FOUND) |
| set(LIBEVENT_INCLUDE_DIRS ${LIBEVENT_INCLUDE_DIR}) |
| set(LIBEVENT_LIBRARIES) |
| foreach(COMPONENT ${Libevent_FIND_COMPONENTS}) |
| string(TOUPPER "${COMPONENT}" COMPONENT_UPPER) |
| list(APPEND LIBEVENT_LIBRARIES ${LIBEVENT_${COMPONENT_UPPER}_LIBRARY}) |
| set(LIBEVENT_${COMPONENT_UPPER}_FOUND ${Libevent_${COMPONENT}_FOUND}) |
| endforeach() |
| endif() |
| |
| mark_as_advanced(LIBEVENT_INCLUDE_DIR ${_LIBEVENT_REQUIRED_VARS}) |
| |
| # Restore the original find library ordering |
| if( Libevent_USE_STATIC_LIBS ) |
| set(CMAKE_FIND_LIBRARY_SUFFIXES ${_libevent_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES}) |
| endif() |
| unset(_LIBEVENT_REQUIRED_VARS) |