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CMakeLists.txt
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# CMakeLists.txt
#
# Top-level CMake file for the Paho C++ library.
#
#*******************************************************************************
# This is part of the Paho MQTT C++ client library.
#
# Copyright (c) 2017-2025, Frank Pagliughi
# Copyright (c) 2016-2017, Guilherme Maciel Ferreira
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Eclipse Public License v2.0
# and Eclipse Distribution License v1.0 which accompany this distribution.
#
# The Eclipse Public License is available at
# http://www.eclipse.org/legal/epl-v20.html
# and the Eclipse Distribution License is available at
# http://www.eclipse.org/org/documents/edl-v10.php.
#
# Contributors:
# Guilherme Maciel Ferreira - initial version
# Frank Pagliughi
#*******************************************************************************/
cmake_minimum_required(VERSION 3.13)
project(PahoMqttCpp VERSION "1.5.1")
## --- Build options ---
if(WIN32)
option(PAHO_BUILD_STATIC "Build static library" TRUE)
option(PAHO_BUILD_SHARED "Build shared library (DLL)" FALSE)
option(PAHO_WITH_SSL "Build SSL-enabled library" FALSE)
else()
option(PAHO_BUILD_STATIC "Build static library" FALSE)
option(PAHO_BUILD_SHARED "Build shared library" TRUE)
option(PAHO_WITH_SSL "Build SSL-enabled library" TRUE)
option(PAHO_BUILD_DEB_PACKAGE "Build debian package" FALSE)
endif()
option(PAHO_BUILD_SAMPLES "Build sample/example programs" FALSE)
option(PAHO_BUILD_EXAMPLES "Build sample/example programs" FALSE)
option(PAHO_BUILD_TESTS "Build tests (requires Catch2)" FALSE)
option(PAHO_BUILD_DOCUMENTATION "Create and install the API documentation (requires Doxygen)" FALSE)
option(PAHO_WITH_MQTT_C "Build Paho C from the internal GIT submodule." FALSE)
if(NOT PAHO_BUILD_SHARED AND NOT PAHO_BUILD_STATIC)
message(FATAL_ERROR "You must set either PAHO_BUILD_SHARED, PAHO_BUILD_STATIC, or both")
endif()
# --- Setting naming variables ---
set(PAHO_MQTTPP_GENERATED_DIR ${CMAKE_CURRENT_BINARY_DIR}/generated)
## --- Find Paho C or build it, if reqested ---
if(PAHO_WITH_SSL)
find_package(OpenSSL REQUIRED)
set(PAHO_MQTT_C_LIB eclipse-paho-mqtt-c::paho-mqtt3as)
else()
set(PAHO_MQTT_C_LIB eclipse-paho-mqtt-c::paho-mqtt3a)
endif()
if(PAHO_WITH_MQTT_C)
message(STATUS "Paho C: Bundled")
## Build the Paho C library from the submodule
set(PAHO_ENABLE_TESTING FALSE CACHE BOOL "No Paho C tests")
set(PAHO_HIGH_PERFORMANCE TRUE CACHE BOOL "Paho C high performance")
if(NOT WIN32)
set(PAHO_WITH_UNIX_SOCKETS TRUE CACHE BOOL "Support for Unix-domain sockets")
endif()
add_subdirectory(${PROJECT_SOURCE_DIR}/externals/paho-mqtt-c)
## Alias namespace so that the full names can be used with the subdir.
if(PAHO_BUILD_SHARED)
add_library(eclipse-paho-mqtt-c::paho-mqtt3a ALIAS paho-mqtt3a)
list(APPEND PAHO_MQTT_C_LIBS paho-mqtt3a)
if(PAHO_WITH_SSL)
add_library(eclipse-paho-mqtt-c::paho-mqtt3as ALIAS paho-mqtt3as)
list(APPEND PAHO_MQTT_C_LIBS paho-mqtt3as)
endif()
endif()
if(PAHO_BUILD_STATIC)
add_library(eclipse-paho-mqtt-c::paho-mqtt3a-static ALIAS paho-mqtt3a-static)
list(APPEND PAHO_MQTT_C_LIBS paho-mqtt3a-static)
if(PAHO_WITH_SSL)
add_library(eclipse-paho-mqtt-c::paho-mqtt3as-static ALIAS paho-mqtt3as-static)
list(APPEND PAHO_MQTT_C_LIBS paho-mqtt3as-static)
endif()
endif()
## install paho.mqtt.c library (appending to PahoMqttCpp export)
install(TARGETS ${PAHO_MQTT_C_LIBS}
EXPORT PahoMqttCpp
ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
)
else()
find_package(eclipse-paho-mqtt-c REQUIRED)
endif()
# --- System Details ---
include(GNUInstallDirs)
if(WIN32)
add_definitions(-D_CRT_SECURE_NO_WARNINGS)
set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
set(LIBS_SYSTEM ws2_32)
endif()
# --- The headers ---
add_subdirectory(include/mqtt)
# For the paho_mqtt_c module
list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
add_subdirectory(src)
# --- Documentation ---
if(PAHO_BUILD_DOCUMENTATION)
add_subdirectory(doc)
endif()
# --- Example Apps ---
if(PAHO_BUILD_SAMPLES OR PAHO_BUILD_EXAMPLES)
add_subdirectory(examples)
endif()
# --- Unit Tests ---
if(PAHO_BUILD_TESTS)
enable_testing()
add_subdirectory(test/unit)
endif()
## --- Install generated header(s) ---
install(
DIRECTORY
${PAHO_MQTTPP_GENERATED_DIR}/include/
DESTINATION
${CMAKE_INSTALL_INCLUDEDIR}
)
## --- Packaging settings ---
if(WIN32)
set(CPACK_GENERATOR "ZIP")
elseif(UNIX)
if(PAHO_BUILD_DEB_PACKAGE)
set(CPACK_GENERATOR "DEB")
include(cmake/CPackDebConfig.cmake)
else()
set(CPACK_GENERATOR "TGZ")
endif()
endif()
include(CPack)
# --- Export CMake TARGETS ---
add_subdirectory(cmake)