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zeromq: Conditionally enable by default

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Instead of having ZeroMQ as a new dependency, enable the ZeroMQ backend only
if ZeroMQ is available on the system as suggested by Tim.
This commit is contained in:
Arne Welzel 2024-12-04 17:15:16 +01:00
parent d816bfb249
commit 07e23fb95e
3 changed files with 18 additions and 9 deletions
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15
src/cluster/backend/CMakeLists.txt
View file

@ -1,4 +1,17 @@
option(ENABLE_CLUSTER_BACKEND_ZEROMQ "Enable the ZeroMQ cluster backend" ON)
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/zeromq/cmake")
find_package(ZeroMQ)
# Default to building ZeroMQ only if ZeroMQ was found.
#
# If a user enabled the cluster backend explicitly (-D ENABLE_CLUSTER_BACKEND_ZEROMQ:bool=ON),
# but ZeroMQ wasn' found, hard bail.
option(ENABLE_CLUSTER_BACKEND_ZEROMQ "Enable the ZeroMQ cluster backend" ${ZeroMQ_FOUND})
if (ENABLE_CLUSTER_BACKEND_ZEROMQ)
if (NOT ZeroMQ_FOUND)
message(FATAL_ERROR "ENABLE_CLUSTER_BACKEND_ZEROMQ set, but ZeroMQ library not available")
endif ()
add_subdirectory(zeromq)
endif ()

2
src/cluster/backend/zeromq/CMakeLists.txt
View file

@ -2,8 +2,6 @@ list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
find_package(ZeroMQ REQUIRED)
message(STATUS "zeromq: ${ZeroMQ_LIBRARIES} ${ZeroMQ_INCLUDE_DIRS}")
zeek_add_plugin(
Zeek
Cluster_Backend_ZeroMQ

10
src/cluster/backend/zeromq/cmake/FindZeroMQ.cmake
View file

@ -1,5 +1,7 @@
include(FindPackageHandleStandardArgs)
set(AUXIL_CPPZMQ_DIR ${CMAKE_CURRENT_LIST_DIR}/../auxil/cppzmq)
find_library(ZeroMQ_LIBRARY NAMES zmq HINTS ${ZeroMQ_ROOT_DIR}/lib)
find_path(ZeroMQ_INCLUDE_DIR NAMES zmq.h HINTS ${ZeroMQ_ROOT_DIR}/include)
@ -31,18 +33,14 @@ endif ()
if (NOT ZeroMQ_CPP_VERSION)
# Probably no zmq.hpp file, use the version from auxil
set(ZeroMQ_CPP_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/auxil/cppzmq"
CACHE FILEPATH "Include path for cppzmq" FORCE)
set(ZeroMQ_CPP_INCLUDE_DIR ${AUXIL_CPPZMQ_DIR} CACHE FILEPATH "Include path for cppzmq" FORCE)
set_cppzmq_version()
elseif (ZeroMQ_CPP_VERSION VERSION_LESS "4.9.0")
message(STATUS "Found old cppzmq version ${ZeroMQ_CPP_VERSION}, using bundled version")
set(ZeroMQ_CPP_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/auxil/cppzmq"
CACHE FILEPATH "Include path for cppzmq" FORCE)
set(ZeroMQ_CPP_INCLUDE_DIR ${AUXIL_CPPZMQ_DIR} CACHE FILEPATH "Include path for cppzmq" FORCE)
set_cppzmq_version()
endif ()
message(STATUS "Using cppzmq ${ZeroMQ_CPP_VERSION} from ${ZeroMQ_CPP_INCLUDE_DIR}")
find_package_handle_standard_args(
ZeroMQ FOUND_VAR ZeroMQ_FOUND REQUIRED_VARS ZeroMQ_LIBRARY ZeroMQ_INCLUDE_DIR
ZeroMQ_CPP_INCLUDE_DIR ZeroMQ_CPP_VERSION)