File: CMakeLists.txt

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libarcus 3.3.0-2
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project(arcus)
cmake_minimum_required(VERSION 2.8.12)

include(GNUInstallDirs)
include(CMakePackageConfigHelpers)

option(BUILD_PYTHON "Build " ON)
option(BUILD_EXAMPLES "Build the example programs" ON)
option(BUILD_STATIC "Build as a static library" OFF)

option(MSVC_STATIC_RUNTIME "Link the MSVC runtime statically" OFF)

# We want to have access to protobuf_generate_cpp and other FindProtobuf features.
# However, if ProtobufConfig is used instead, there is a CMake option that controls
# this, which defaults to OFF. We need to force this option to ON instead.
set(protobuf_MODULE_COMPATIBLE ON CACHE "" INTERNAL FORCE)
find_package(Protobuf 3.0.0 REQUIRED)

set(CMAKE_POSITION_INDEPENDENT_CODE ON) #Required if a patch to libArcus needs to be made via templates.

if(BUILD_PYTHON)
    set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake)
    find_package(SIP REQUIRED)
    if(NOT DEFINED LIB_SUFFIX)
        set(LIB_SUFFIX "")
    endif()
    if(EXISTS /etc/debian_version)
        # Running on a debian-based system, which requires special handling for python modules.
        set(PYTHON_SITE_PACKAGES_DIR lib${LIB_SUFFIX}/python3/dist-packages CACHE STRING "Directory to install Python bindings to")
    else()
        set(PYTHON_SITE_PACKAGES_DIR lib${LIB_SUFFIX}/python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}/site-packages CACHE STRING "Directory to install Python bindings to")
    endif()
    include_directories(python/ src/ ${SIP_INCLUDE_DIR} ${PYTHON_INCLUDE_DIR})
endif()

if(NOT ${CMAKE_VERSION} VERSION_LESS 3.1)
    set(CMAKE_CXX_STANDARD 11)
else()
    set(CMAKE_CXX_FLAGS "-std=c++11")
endif()

if(APPLE AND CMAKE_CXX_COMPILER_ID MATCHES "Clang")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
endif()

set(arcus_SRCS
    src/Socket.cpp
    src/SocketListener.cpp
    src/MessageTypeStore.cpp
    src/PlatformSocket.cpp
    src/Error.cpp
)

set(arcus_HDRS
    src/Socket.h
    src/SocketListener.h
    src/Types.h
    src/ArcusExport.h
    src/MessageTypeStore.h
    src/Error.h
)

set(ARCUS_VERSION 1.1.0)
set(ARCUS_SOVERSION 3)

if(BUILD_STATIC)
    add_library(Arcus STATIC ${arcus_SRCS})
    if(NOT WIN32 OR CMAKE_COMPILER_IS_GNUCXX)
        target_link_libraries(Arcus PRIVATE pthread)
        set_target_properties(Arcus PROPERTIES COMPILE_FLAGS -fPIC)
    endif()
else()
    add_library(Arcus SHARED ${arcus_SRCS})
endif()

if(MSVC_STATIC_RUNTIME)
    foreach(flag_var
            CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
            CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
    if(${flag_var} MATCHES "/MD")
        string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
    endif(${flag_var} MATCHES "/MD")
    endforeach(flag_var)
endif()

if(BUILD_PYTHON)
    set(SIP_EXTRA_FILES_DEPEND python/SocketListener.sip python/Types.sip python/PythonMessage.sip python/Error.sip)
    set(SIP_EXTRA_SOURCE_FILES python/PythonMessage.cpp)
    set(SIP_EXTRA_OPTIONS -g) # -g means always release the GIL before calling C++ methods.
    add_sip_python_module(Arcus python/Socket.sip Arcus)
endif()

target_include_directories(Arcus PUBLIC
    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>
    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
    ${PROTOBUF_INCLUDE_DIR}
)
target_link_libraries(Arcus PUBLIC ${PROTOBUF_LIBRARIES})

if(WIN32)
    add_definitions(-D_WIN32_WINNT=0x0600) # Declare we require Vista or higher, this allows us to use IPv6 functions.
    target_link_libraries(Arcus PUBLIC Ws2_32)
endif()

if(${CMAKE_BUILD_TYPE})
    if(${CMAKE_BUILD_TYPE} STREQUAL "Debug" OR ${CMAKE_BUILD_TYPE} STREQUAL "RelWithDebInfo")
        add_definitions(-DARCUS_DEBUG)
    endif()
endif()

set_target_properties(Arcus PROPERTIES
    FRAMEWORK FALSE
    VERSION ${ARCUS_VERSION}
    SOVERSION ${ARCUS_SOVERSION}
    PUBLIC_HEADER "${arcus_HDRS}"
    DEFINE_SYMBOL MAKE_ARCUS_LIB
)

if(BUILD_EXAMPLES)
    add_subdirectory(examples)
endif()

install(TARGETS Arcus
    EXPORT Arcus-targets
    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
    PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/Arcus
)

install(EXPORT Arcus-targets
    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/Arcus
)

configure_package_config_file(ArcusConfig.cmake.in ${CMAKE_BINARY_DIR}/ArcusConfig.cmake INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/Arcus)
write_basic_package_version_file(${CMAKE_BINARY_DIR}/ArcusConfigVersion.cmake VERSION ${ARCUS_VERSION} COMPATIBILITY SameMajorVersion)

install(FILES
    ${CMAKE_BINARY_DIR}/ArcusConfig.cmake
    ${CMAKE_BINARY_DIR}/ArcusConfigVersion.cmake
    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/Arcus
)

include(CPackConfig.cmake)