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# Copyright 2019-2022, Collabora, Ltd.
#
# SPDX-License-Identifier: BSL-1.0
#
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE_1_0.txt or copy at
# http://www.boost.org/LICENSE_1_0.txt)
#
# Original Author:
# 2019, 2021, 2022 Rylie Pavlik <rylie.pavlik@collabora.com>
#[[.rst:
FindLibevent
---------------
Find the libevent library.
Components
^^^^^^^^^^
The following components are supported:
* ``core`` - core functionality
* ``extra`` - extra functions (http, dns, rpc)
* ``pthreads`` - multithreading (not avail on windows)
* ``openssl` - OpenSSL support
If none are specified, the default is ``core``.
Targets
^^^^^^^
If successful, the following imported targets are created, based on selected/found components
* ``Libevent::core``
* ``Libevent::extra``
* ``Libevent::pthreads``
* ``Libevent::openssl``
Cache variables
^^^^^^^^^^^^^^^
The following cache variable may also be set to assist/control the operation of this module:
``Libevent_ROOT_DIR``
The root to search for libevent.
#]]
set(Libevent_ROOT_DIR
"${Libevent_ROOT_DIR}"
CACHE PATH "Root to search for libevent")
if(NOT Libevent_FIND_COMPONENTS)
set(Libevent_FIND_COMPONENTS core)
endif()
# Todo: handle in-tree/fetch-content builds?
if(NOT LIBEVENT_FOUND)
# Look for a CMake config file
find_package(Libevent QUIET NO_MODULE)
endif()
set(_known_components core extra openssl)
if(NOT WIN32)
list(APPEND _known_components pthreads)
endif()
set(_got_targets FALSE)
foreach(_component ${_known_components})
if(TARGET libevent::${_component})
set(Libevent_${_component}_FOUND TRUE)
set(Libevent_${_component}_LIBRARY libevent::${_component})
set(_got_targets TRUE)
endif()
endforeach()
if(NOT ANDROID)
find_package(PkgConfig QUIET)
if(PKG_CONFIG_FOUND)
set(_old_prefix_path "${CMAKE_PREFIX_PATH}")
# So pkg-config uses Libevent_ROOT_DIR too.
if(Libevent_ROOT_DIR)
list(APPEND CMAKE_PREFIX_PATH ${Libevent_ROOT_DIR})
endif()
foreach(_component ${_known_components})
pkg_check_modules(PC_Libevent_${_component} QUIET
libevent_${_component})
endforeach()
# Restore
set(CMAKE_PREFIX_PATH "${_old_prefix_path}")
endif()
endif()
find_path(
Libevent_INCLUDE_DIR
NAMES event2/event.h
PATHS ${Libevent_ROOT_DIR}
HINTS ${PC_Libevent_INCLUDE_DIRS} ${LIBEVENT_INCLUDE_DIRS}
PATH_SUFFIXES include)
foreach(_component ${_known_components})
find_library(
Libevent_${_component}_LIBRARY
NAMES event_${_component}
PATHS ${Libevent_ROOT_DIR}
HINTS ${PC_Libevent_${_component}_LIBRARY_DIRS}
PATH_SUFFIXES lib)
if(Libevent_${_component}_LIBRARY)
set(Libevent_${_component}_FOUND TRUE)
endif()
endforeach()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(
Libevent
REQUIRED_VARS Libevent_INCLUDE_DIR
HANDLE_COMPONENTS)
if(Libevent_FOUND)
foreach(_component ${_known_components})
mark_as_advanced(Libevent_${_component}_LIBRARY)
if(Libevent_${_component}_FOUND AND NOT TARGET Libevent::${_component})
if(TARGET ${Libevent_${_component}_LIBRARY})
# we want an alias
add_library(Libevent::${_component} ALIAS
${Libevent_${_component}_LIBRARY})
else()
# we want an imported target
add_library(Libevent::${_component} UNKNOWN IMPORTED)
set_target_properties(
Libevent::${_component}
PROPERTIES INTERFACE_INCLUDE_DIRECTORIES
"${Libevent_INCLUDE_DIR}"
IMPORTED_LINK_INTERFACE_LANGUAGES "C"
IMPORTED_LOCATION
${Libevent_${_component}_LIBRARY})
endif()
endif()
endforeach()
mark_as_advanced(Libevent_INCLUDE_DIR)
endif()
mark_as_advanced(Libevent_ROOT_DIR Libevent_LIBRT Libevent_LIBM)
include(FeatureSummary)
set_package_properties(
Libevent PROPERTIES
URL "https://libevent.org/"
DESCRIPTION "An event-notification library.")
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