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third_party_nghttp2/cmake/FindLibevent.cmake

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CMake
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cmake: add auto-detection, improve library search Add auto-detection to the most important features (app, hpack, etc.). Move options to a separate file for easier search. Add cmake-based Libevent, jansson and CUnit search. Move pkg-config handling for Libev and jemalloc to their cmake files. Note: duplicates find_package before including CMakeOptions.txt and when checking for features. Maybe that can be cleaned up later...
2016-02-15 00:12:07 +00:00
# - 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)
cmake: fix version checks for external packages The name passed to find_package should match the one that is passed to find_package_handle_standard_args, otherwise the version matching is not properly done. The names are based on the FindXXX.cmake filename. This also simplifies components reporting for Libevent (done by find_package_handle_standard_args) and results in reporting a library instead of include directory when found.
2016-03-13 12:09:37 +00:00
# LIBEVENT_<C>_LIBRARY - Library to be linked for Libevent component <C>.
cmake: add auto-detection, improve library search Add auto-detection to the most important features (app, hpack, etc.). Move options to a separate file for easier search. Add cmake-based Libevent, jansson and CUnit search. Move pkg-config handling for Libev and jemalloc to their cmake files. Note: duplicates find_package before including CMakeOptions.txt and when checking for features. Maybe that can be cleaned up later...
2016-02-15 00:12:07 +00:00
find_package(PkgConfig QUIET)
pkg_check_modules(PC_LIBEVENT QUIET libevent)
# Look for the Libevent 2.0 or 1.4 headers
find_path(LIBEVENT_INCLUDE_DIR
NAMES
event2/event-config.h
event-config.h
HINTS
${PC_LIBEVENT_INCLUDE_DIRS}
)
if(LIBEVENT_INCLUDE_DIR)
set(_version_regex "^#define[ \t]+_EVENT_VERSION[ \t]+\"([^\"]+)\".*")
if(EXISTS "${LIBEVENT_INCLUDE_DIR}/event2/event-config.h")
# Libevent 2.0
file(STRINGS "${LIBEVENT_INCLUDE_DIR}/event2/event-config.h"
LIBEVENT_VERSION REGEX "${_version_regex}")
cmake: Fix libevent version detection On my x86_64 Gentoo Linux, the CMake build won't find libevent because Gentoo wraps include files via multilib-aware wrappers. This means that the "real" include file lives in /usr/include/x86_64-pc-linux-gnu/event2/event-config.h , and that there's a proxy file at /usr/include/event2/event-config.h which check the compile target's architecture and includes the real file from a correct directory. In other words, nghttp2's CMake FindLibevent.cmake reads a wrong file and ends up not detecting the libevent's version. This patch fixes it by simply using the version reported by pkg-config as the libevent's version if the original method fails. I will be happy to change this patch to always check version from pkg-config if you're OK with that. Signed-off-by: Jan Kundrát <jan.kundrat@cesnet.cz>
2018-10-03 15:38:17 +00:00
if("${LIBEVENT_VERSION}" STREQUAL "")
set(LIBEVENT_VERSION ${PC_LIBEVENT_VERSION})
endif()
cmake: add auto-detection, improve library search Add auto-detection to the most important features (app, hpack, etc.). Move options to a separate file for easier search. Add cmake-based Libevent, jansson and CUnit search. Move pkg-config handling for Libev and jemalloc to their cmake files. Note: duplicates find_package before including CMakeOptions.txt and when checking for features. Maybe that can be cleaned up later...
2016-02-15 00:12:07 +00:00
else()
# Libevent 1.4
file(STRINGS "${LIBEVENT_INCLUDE_DIR}/event-config.h"
LIBEVENT_VERSION REGEX "${_version_regex}")
endif()
string(REGEX REPLACE "${_version_regex}" "\\1"
LIBEVENT_VERSION "${LIBEVENT_VERSION}")
unset(_version_regex)
endif()
cmake: fix version checks for external packages The name passed to find_package should match the one that is passed to find_package_handle_standard_args, otherwise the version matching is not properly done. The names are based on the FindXXX.cmake filename. This also simplifies components reporting for Libevent (done by find_package_handle_standard_args) and results in reporting a library instead of include directory when found.
2016-03-13 12:09:37 +00:00
set(_LIBEVENT_REQUIRED_VARS)
cmake: add auto-detection, improve library search Add auto-detection to the most important features (app, hpack, etc.). Move options to a separate file for easier search. Add cmake-based Libevent, jansson and CUnit search. Move pkg-config handling for Libev and jemalloc to their cmake files. Note: duplicates find_package before including CMakeOptions.txt and when checking for features. Maybe that can be cleaned up later...
2016-02-15 00:12:07 +00:00
foreach(COMPONENT ${Libevent_FIND_COMPONENTS})
set(_LIBEVENT_LIBNAME libevent)
# Note: compare two variables to avoid a CMP0054 policy warning
if(COMPONENT STREQUAL _LIBEVENT_LIBNAME)
set(_LIBEVENT_LIBNAME event)
else()
set(_LIBEVENT_LIBNAME "event_${COMPONENT}")
endif()
cmake: fix version checks for external packages The name passed to find_package should match the one that is passed to find_package_handle_standard_args, otherwise the version matching is not properly done. The names are based on the FindXXX.cmake filename. This also simplifies components reporting for Libevent (done by find_package_handle_standard_args) and results in reporting a library instead of include directory when found.
2016-03-13 12:09:37 +00:00
string(TOUPPER "${COMPONENT}" COMPONENT_UPPER)
find_library(LIBEVENT_${COMPONENT_UPPER}_LIBRARY
cmake: add auto-detection, improve library search Add auto-detection to the most important features (app, hpack, etc.). Move options to a separate file for easier search. Add cmake-based Libevent, jansson and CUnit search. Move pkg-config handling for Libev and jemalloc to their cmake files. Note: duplicates find_package before including CMakeOptions.txt and when checking for features. Maybe that can be cleaned up later...
2016-02-15 00:12:07 +00:00
NAMES ${_LIBEVENT_LIBNAME}
HINTS ${PC_LIBEVENT_LIBRARY_DIRS}
)
cmake: fix version checks for external packages The name passed to find_package should match the one that is passed to find_package_handle_standard_args, otherwise the version matching is not properly done. The names are based on the FindXXX.cmake filename. This also simplifies components reporting for Libevent (done by find_package_handle_standard_args) and results in reporting a library instead of include directory when found.
2016-03-13 12:09:37 +00:00
if(LIBEVENT_${COMPONENT_UPPER}_LIBRARY)
set(Libevent_${COMPONENT}_FOUND 1)
cmake: add auto-detection, improve library search Add auto-detection to the most important features (app, hpack, etc.). Move options to a separate file for easier search. Add cmake-based Libevent, jansson and CUnit search. Move pkg-config handling for Libev and jemalloc to their cmake files. Note: duplicates find_package before including CMakeOptions.txt and when checking for features. Maybe that can be cleaned up later...
2016-02-15 00:12:07 +00:00
endif()
cmake: fix version checks for external packages The name passed to find_package should match the one that is passed to find_package_handle_standard_args, otherwise the version matching is not properly done. The names are based on the FindXXX.cmake filename. This also simplifies components reporting for Libevent (done by find_package_handle_standard_args) and results in reporting a library instead of include directory when found.
2016-03-13 12:09:37 +00:00
list(APPEND _LIBEVENT_REQUIRED_VARS LIBEVENT_${COMPONENT_UPPER}_LIBRARY)
cmake: add auto-detection, improve library search Add auto-detection to the most important features (app, hpack, etc.). Move options to a separate file for easier search. Add cmake-based Libevent, jansson and CUnit search. Move pkg-config handling for Libev and jemalloc to their cmake files. Note: duplicates find_package before including CMakeOptions.txt and when checking for features. Maybe that can be cleaned up later...
2016-02-15 00:12:07 +00:00
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.
cmake: fix version checks for external packages The name passed to find_package should match the one that is passed to find_package_handle_standard_args, otherwise the version matching is not properly done. The names are based on the FindXXX.cmake filename. This also simplifies components reporting for Libevent (done by find_package_handle_standard_args) and results in reporting a library instead of include directory when found.
2016-03-13 12:09:37 +00:00
find_package_handle_standard_args(Libevent REQUIRED_VARS
cmake: add auto-detection, improve library search Add auto-detection to the most important features (app, hpack, etc.). Move options to a separate file for easier search. Add cmake-based Libevent, jansson and CUnit search. Move pkg-config handling for Libev and jemalloc to their cmake files. Note: duplicates find_package before including CMakeOptions.txt and when checking for features. Maybe that can be cleaned up later...
2016-02-15 00:12:07 +00:00
${_LIBEVENT_REQUIRED_VARS}
cmake: fix version checks for external packages The name passed to find_package should match the one that is passed to find_package_handle_standard_args, otherwise the version matching is not properly done. The names are based on the FindXXX.cmake filename. This also simplifies components reporting for Libevent (done by find_package_handle_standard_args) and results in reporting a library instead of include directory when found.
2016-03-13 12:09:37 +00:00
LIBEVENT_INCLUDE_DIR
cmake: add auto-detection, improve library search Add auto-detection to the most important features (app, hpack, etc.). Move options to a separate file for easier search. Add cmake-based Libevent, jansson and CUnit search. Move pkg-config handling for Libev and jemalloc to their cmake files. Note: duplicates find_package before including CMakeOptions.txt and when checking for features. Maybe that can be cleaned up later...
2016-02-15 00:12:07 +00:00
VERSION_VAR LIBEVENT_VERSION
HANDLE_COMPONENTS)
if(LIBEVENT_FOUND)
set(LIBEVENT_INCLUDE_DIRS ${LIBEVENT_INCLUDE_DIR})
set(LIBEVENT_LIBRARIES)
cmake: fix version checks for external packages The name passed to find_package should match the one that is passed to find_package_handle_standard_args, otherwise the version matching is not properly done. The names are based on the FindXXX.cmake filename. This also simplifies components reporting for Libevent (done by find_package_handle_standard_args) and results in reporting a library instead of include directory when found.
2016-03-13 12:09:37 +00:00
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})
cmake: add auto-detection, improve library search Add auto-detection to the most important features (app, hpack, etc.). Move options to a separate file for easier search. Add cmake-based Libevent, jansson and CUnit search. Move pkg-config handling for Libev and jemalloc to their cmake files. Note: duplicates find_package before including CMakeOptions.txt and when checking for features. Maybe that can be cleaned up later...
2016-02-15 00:12:07 +00:00
endforeach()
endif()
cmake: fix version checks for external packages The name passed to find_package should match the one that is passed to find_package_handle_standard_args, otherwise the version matching is not properly done. The names are based on the FindXXX.cmake filename. This also simplifies components reporting for Libevent (done by find_package_handle_standard_args) and results in reporting a library instead of include directory when found.
2016-03-13 12:09:37 +00:00
mark_as_advanced(LIBEVENT_INCLUDE_DIR ${_LIBEVENT_REQUIRED_VARS})
cmake: add auto-detection, improve library search Add auto-detection to the most important features (app, hpack, etc.). Move options to a separate file for easier search. Add cmake-based Libevent, jansson and CUnit search. Move pkg-config handling for Libev and jemalloc to their cmake files. Note: duplicates find_package before including CMakeOptions.txt and when checking for features. Maybe that can be cleaned up later...
2016-02-15 00:12:07 +00:00
unset(_LIBEVENT_REQUIRED_VARS)
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