CMake interface library

[GMellar]

I wonder if any of the azmq library use it inside an existing source tree without the need for installation. CMake offers interface libraries for that so one can just use azmq as library and all the link dependencies are considered and all include directories are appended to the search path as well. I made some changes to the CMakeLists file on my local repository. Is there any interest in including it to the public repository? Let me know and I'd like to share these changes.

[GuillaumeDuaForSquad]

Well, I'd say a clean target as interface library might be great.

Here's how I import azmq library.
However, the issue is that the codebase use concept to name structure,
which is a reserved keyword in C++20 for ... concept specifications.

So, the issue is you cannot set a target_property CXX_STANDARD on an INTERFACE library,
thus a C++20 target cannot properly compile when it consume the library

include(FetchContent)

FetchContent_Declare(azmq_download
    GIT_REPOSITORY https://github.com/zeromq/azmq.git
    # GIT_TAG        v1.0.2
    UPDATE_DISCONNECTED true
)
set(azmq_NO_TESTS on)
FetchContent_GetProperties(azmq_download)
if(NOT azmq_download_POPULATED)
  FetchContent_Populate(azmq_download)

  file(MAKE_DIRECTORY ${azmq_download_SOURCE_DIR}/includes)
  file(COPY ${azmq_download_SOURCE_DIR}/azmq DESTINATION ${azmq_download_SOURCE_DIR}/includes)

  add_subdirectory(${azmq_download_SOURCE_DIR} ${azmq_download_BINARY_DIR})
endif()

add_library(azmq INTERFACE)
target_include_directories(azmq
    INTERFACE
        ${azmq_download_SOURCE_DIR}/includes
)
find_package(Boost REQUIRED COMPONENTS system date_time thread chrono regex random)
list(APPEND CMAKE_MODULE_PATH ${azmq_download_SOURCE_DIR}/config)
find_package(ZeroMQ REQUIRED)

add_library(ZeroMQ_library IMPORTED SHARED)
set_target_properties(ZeroMQ_library PROPERTIES
    IMPORTED_CONFIGURATIONS         "RELEASE;DEBUG"
    IMPORTED_LOCATION               ${ZeroMQ_LIBRARIES}
    INTERFACE_INCLUDE_DIRECTORIES   ${ZeroMQ_INCLUDE_DIRS}
)

target_link_libraries(azmq
    INTERFACE
        Boost::chrono
        Boost::date_time
        Boost::random
        Boost::regex
        Boost::system
        Boost::thread
        ZeroMQ_library
)

[edit] add linkage

[aboseley]

@GMellar, yes please, then it could be consumed in the standard way