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Diffstat (limited to 'cmake/module/FindLibevent.cmake')
| -rw-r--r-- | cmake/module/FindLibevent.cmake | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/cmake/module/FindLibevent.cmake b/cmake/module/FindLibevent.cmake new file mode 100644 index 0000000000..901a4f3bd4 --- /dev/null +++ b/cmake/module/FindLibevent.cmake @@ -0,0 +1,80 @@ +# Copyright (c) 2024-present The Bitcoin Core developers +# Distributed under the MIT software license, see the accompanying +# file COPYING or https://opensource.org/license/mit/. + +#[=======================================================================[ +FindLibevent +------------ + +Finds the Libevent headers and libraries. + +This is a wrapper around find_package()/pkg_check_modules() commands that: + - facilitates searching in various build environments + - prints a standard log message + +#]=======================================================================] + +# Check whether evhttp_connection_get_peer expects const char**. +# See https://github.com/libevent/libevent/commit/a18301a2bb160ff7c3ffaf5b7653c39ffe27b385 +function(check_evhttp_connection_get_peer target) + include(CMakePushCheckState) + cmake_push_check_state(RESET) + set(CMAKE_REQUIRED_LIBRARIES ${target}) + include(CheckCXXSourceCompiles) + check_cxx_source_compiles(" + #include <cstdint> + #include <event2/http.h> + + int main() + { + evhttp_connection* conn = (evhttp_connection*)1; + const char* host; + uint16_t port; + evhttp_connection_get_peer(conn, &host, &port); + } + " HAVE_EVHTTP_CONNECTION_GET_PEER_CONST_CHAR + ) + cmake_pop_check_state() + set(HAVE_EVHTTP_CONNECTION_GET_PEER_CONST_CHAR ${HAVE_EVHTTP_CONNECTION_GET_PEER_CONST_CHAR} PARENT_SCOPE) +endfunction() + + +include(FindPackageHandleStandardArgs) +if(VCPKG_TARGET_TRIPLET) + find_package(Libevent ${Libevent_FIND_VERSION} NO_MODULE QUIET + COMPONENTS extra + ) + find_package_handle_standard_args(Libevent + REQUIRED_VARS Libevent_DIR + VERSION_VAR Libevent_VERSION + ) + check_evhttp_connection_get_peer(libevent::extra) + add_library(libevent::libevent ALIAS libevent::extra) + mark_as_advanced(Libevent_DIR) + mark_as_advanced(_event_h) + mark_as_advanced(_event_lib) +else() + find_package(PkgConfig REQUIRED) + pkg_check_modules(libevent QUIET + IMPORTED_TARGET + libevent>=${Libevent_FIND_VERSION} + ) + set(_libevent_required_vars libevent_LIBRARY_DIRS libevent_FOUND) + if(NOT WIN32) + pkg_check_modules(libevent_pthreads QUIET + IMPORTED_TARGET + libevent_pthreads>=${Libevent_FIND_VERSION} + ) + list(APPEND _libevent_required_vars libevent_pthreads_FOUND) + endif() + find_package_handle_standard_args(Libevent + REQUIRED_VARS ${_libevent_required_vars} + VERSION_VAR libevent_VERSION + ) + unset(_libevent_required_vars) + check_evhttp_connection_get_peer(PkgConfig::libevent) + add_library(libevent::libevent ALIAS PkgConfig::libevent) + if(NOT WIN32) + add_library(libevent::pthreads ALIAS PkgConfig::libevent_pthreads) + endif() +endif() |