# CMake build script for ZeroMQ
project(ZeroMQ)

if(${CMAKE_SYSTEM_NAME} STREQUAL Darwin)
  cmake_minimum_required(VERSION 3.0.2)
else()
  cmake_minimum_required(VERSION 2.8.12)
endif()

include(CheckIncludeFiles)
include(CheckCCompilerFlag)
include(CheckCXXCompilerFlag)
include(CheckLibraryExists)
include(CheckCSourceCompiles)
include(CheckCSourceRuns)
include(CMakeDependentOption)
include(CheckCXXSymbolExists)
include(CheckTypeSize)
include(FindThreads)
include(GNUInstallDirs)
include(CheckTypeSize)
include(CMakePackageConfigHelpers)

list(INSERT CMAKE_MODULE_PATH 0 "${CMAKE_CURRENT_SOURCE_DIR}")
set(ZMQ_CMAKE_MODULES_DIR ${CMAKE_CURRENT_SOURCE_DIR}/builds/cmake/Modules)
list(APPEND CMAKE_MODULE_PATH ${ZMQ_CMAKE_MODULES_DIR})

include(TestZMQVersion)
include(ZMQSourceRunChecks)
include(ZMQSupportMacros)

option(ENABLE_ASAN "Build with address sanitizer" OFF)
if(ENABLE_ASAN)
  message(STATUS "Instrumenting with Address Sanitizer")
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=address -fsanitize-address-use-after-scope -fno-omit-frame-pointer")
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address -fsanitize-address-use-after-scope -fno-omit-frame-pointer")
  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -fsanitize=address -fsanitize-address-use-after-scope")
  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fsanitize=address -fsanitize-address-use-after-scope")
endif()

option (ENABLE_INTRINSICS "Build using compiler intrinsics for atomic ops" OFF)
if (ENABLE_INTRINSICS)
   message(STATUS "Using compiler intrinsics for atomic ops")
   add_definitions(-DZMQ_HAVE_ATOMIC_INTRINSICS)
endif()

if(${CMAKE_SYSTEM_NAME} STREQUAL Darwin)
  # Find more information: https://cmake.org/Wiki/CMake_RPATH_handling

  # Apply CMP0042: MACOSX_RPATH is enabled by default
  cmake_policy(SET CMP0042 NEW)

  # Add an install rpath if it is not a system directory
  list(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}" isSystemDir)
  if("${isSystemDir}" STREQUAL "-1")
    set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
  endif()

  # Add linker search paths pointing to external dependencies
  set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
endif()

check_cxx_compiler_flag("-std=gnu++11" COMPILER_SUPPORTS_CXX11)
if(COMPILER_SUPPORTS_CXX11)
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")
endif()
check_c_compiler_flag("-std=gnu11" COMPILER_SUPPORTS_C11)
if(COMPILER_SUPPORTS_C11)
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu11")
else()
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99")
endif()

if(NOT MSVC)
  # clang 6 has a warning that does not make sense on multi-platform code
  check_cxx_compiler_flag("-Wno-tautological-constant-compare" CXX_HAS_TAUT_WARNING)
  if(CXX_HAS_TAUT_WARNING)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-tautological-constant-compare")
  endif()
  check_c_compiler_flag("-Wno-tautological-constant-compare" CC_HAS_TAUT_WARNING)
  if(CC_HAS_TAUT_WARNING)
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-tautological-constant-compare")
  endif()
endif()

# Will be used to add flags to pkg-config useful when apps want to statically link
set(pkg_config_libs_private "")
set(pkg_config_names_private "")

option(WITH_OPENPGM "Build with support for OpenPGM" OFF)
option(WITH_VMCI "Build with support for VMware VMCI socket" OFF)

if(APPLE)
  option(ZMQ_BUILD_FRAMEWORK "Build as OS X framework" OFF)
endif()

# Select curve encryption library, defaults to tweetnacl
# To use libsodium instead, use --with-libsodium(must be installed)
# To disable curve, use --disable-curve

option(WITH_LIBSODIUM "Use libsodium instead of built-in tweetnacl" OFF)
option(ENABLE_CURVE "Enable CURVE security" ON)

if(NOT ENABLE_CURVE)
  message(STATUS "CURVE security is disabled")
elseif(WITH_LIBSODIUM)
  find_package(Sodium)
  if(SODIUM_FOUND)
    message(STATUS "Using libsodium for CURVE security")
    include_directories(${SODIUM_INCLUDE_DIRS})
    set(ZMQ_USE_LIBSODIUM 1)
    set(ZMQ_HAVE_CURVE 1)
  else()
    message(FATAL_ERROR
      "libsodium is not installed. Install it, then run CMake again")
  endif()
else()
  message(STATUS "Using tweetnacl for CURVE security")
  list(APPEND sources ${CMAKE_CURRENT_SOURCE_DIR}/src/tweetnacl.c)
  set(ZMQ_USE_TWEETNACL 1)
  set(ZMQ_HAVE_CURVE 1)
endif()

set(SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}")

if(EXISTS "${SOURCE_DIR}/.git")
  option(ENABLE_DRAFTS "Build and install draft classes and methods" ON)
else()
  option(ENABLE_DRAFTS "Build and install draft classes and methods" OFF)
endif()
if(ENABLE_DRAFTS)
  option (ENABLE_RADIX_TREE "Use radix tree implementation to manage subscriptions" ON)
  add_definitions(-DZMQ_BUILD_DRAFT_API)
  set(pkg_config_defines "-DZMQ_BUILD_DRAFT_API=1")
else()
  option (ENABLE_RADIX_TREE "Use radix tree implementation to manage subscriptions" OFF)
  set(pkg_config_defines "")
endif()

if (ENABLE_RADIX_TREE)
   message(STATUS "Using radix tree implementation to manage subscriptions")
   add_definitions(-DZMQ_USE_RADIX_TREE)
endif()

option(WITH_MILITANT "Enable militant assertions" OFF)
if(WITH_MILITANT)
  add_definitions(-DZMQ_ACT_MILITANT)
endif()

set(API_POLLER "" CACHE STRING "Choose polling system for zmq_poll(er)_*. valid values are
  poll or select [default=poll unless POLLER=select]")

set(POLLER "" CACHE STRING "Choose polling system for I/O threads. valid values are
  kqueue, epoll, devpoll, pollset, poll or select [default=autodetect]")

if(NOT MSVC)
  if(POLLER STREQUAL "")
    check_cxx_symbol_exists(kqueue sys/event.h HAVE_KQUEUE)
    if(HAVE_KQUEUE)
      set(POLLER "kqueue")
    endif()
  endif()

  if(POLLER STREQUAL "")
    check_cxx_symbol_exists(epoll_create sys/epoll.h HAVE_EPOLL)
    if(HAVE_EPOLL)
      set(POLLER "epoll")
      check_cxx_symbol_exists(epoll_create1 sys/epoll.h HAVE_EPOLL_CLOEXEC)
      if(HAVE_EPOLL_CLOEXEC)
        set(ZMQ_IOTHREAD_POLLER_USE_EPOLL_CLOEXEC 1)
      endif()
    endif()
  endif()

  if(POLLER STREQUAL "")
    set(CMAKE_EXTRA_INCLUDE_FILES sys/devpoll.h)
    check_type_size("struct pollfd" DEVPOLL)
    set(CMAKE_EXTRA_INCLUDE_FILES)
    if(HAVE_DEVPOLL)
      set(POLLER "devpoll")
    endif()
  endif()

  if(POLLER STREQUAL "")
    check_cxx_symbol_exists(pollset_create sys/pollset.h HAVE_POLLSET)
    if(HAVE_POLLSET)
      set(POLLER "pollset")
    endif()
  endif()

  if(POLLER STREQUAL "")
    check_cxx_symbol_exists(poll poll.h HAVE_POLL)
    if(HAVE_POLL)
      set(POLLER "poll")
    endif()
  endif()
endif()

if(POLLER STREQUAL "")
  if(WIN32)
    set(HAVE_SELECT 1)
  else()
    check_cxx_symbol_exists(select sys/select.h HAVE_SELECT)
  endif()
  if(HAVE_SELECT)
    set(POLLER "select")
  else()
    message(FATAL_ERROR
      "Could not autodetect polling method")
  endif()
endif()

if(POLLER STREQUAL "kqueue"
  OR POLLER STREQUAL "epoll"
  OR POLLER STREQUAL "devpoll"
  OR POLLER STREQUAL "pollset"
  OR POLLER STREQUAL "poll"
  OR POLLER STREQUAL "select")
  message(STATUS "Using polling method in I/O threads: ${POLLER}")
  string(TOUPPER ${POLLER} UPPER_POLLER)
  set(ZMQ_IOTHREAD_POLLER_USE_${UPPER_POLLER} 1)
else()
  message(FATAL_ERROR "Invalid polling method")
endif()

list(APPEND sources ${CMAKE_CURRENT_SOURCE_DIR}/external/sha1/sha1.c ${CMAKE_CURRENT_SOURCE_DIR}/external/sha1/sha1.h)

if(POLLER STREQUAL "epoll" AND WIN32)
  message(STATUS "Including wepoll")
  list(APPEND sources ${CMAKE_CURRENT_SOURCE_DIR}/external/wepoll/wepoll.c ${CMAKE_CURRENT_SOURCE_DIR}/external/wepoll/wepoll.h)
endif()

if(API_POLLER STREQUAL "")
  if(POLLER STREQUAL "select")
    set(API_POLLER "select")
  else()
    set(API_POLLER "poll")
  endif()
endif()

message(STATUS "Using polling method in zmq_poll(er)_* API: ${API_POLLER}")
string(TOUPPER ${API_POLLER} UPPER_API_POLLER)
set(ZMQ_POLL_BASED_ON_${UPPER_API_POLLER} 1)

execute_process(COMMAND getconf LEVEL1_DCACHE_LINESIZE OUTPUT_VARIABLE CACHELINE_SIZE ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
if(CACHELINE_SIZE STREQUAL "" OR CACHELINE_SIZE EQUAL 0 OR CACHELINE_SIZE EQUAL -1)
  set(ZMQ_CACHELINE_SIZE 64)
else()
  set(ZMQ_CACHELINE_SIZE ${CACHELINE_SIZE})
endif()
message(STATUS "Using ${ZMQ_CACHELINE_SIZE} bytes alignment for lock-free data structures")

if(NOT CYGWIN)
  # TODO cannot we simply do 'if(WIN32) set(ZMQ_HAVE_WINDOWS ON)' or similar?
  check_include_files(windows.h ZMQ_HAVE_WINDOWS)
endif()

if (WIN32)
    # from https://stackoverflow.com/a/40217291/2019765
    macro(get_WIN32_WINNT version)
        if (CMAKE_SYSTEM_VERSION)
            set(ver ${CMAKE_SYSTEM_VERSION})
            string(REGEX MATCH "^([0-9]+).([0-9])" ver ${ver})
            string(REGEX MATCH "^([0-9]+)" verMajor ${ver})
            # Check for Windows 10, b/c we'll need to convert to hex 'A'.
            if ("${verMajor}" MATCHES "10")
                set(verMajor "A")
                string(REGEX REPLACE "^([0-9]+)" ${verMajor} ver ${ver})
            endif ("${verMajor}" MATCHES "10")
            # Remove all remaining '.' characters.
            string(REPLACE "." "" ver ${ver})
            # Prepend each digit with a zero.
            string(REGEX REPLACE "([0-9A-Z])" "0\\1" ver ${ver})
            set(${version} "0x${ver}")
        endif(CMAKE_SYSTEM_VERSION)
    endmacro(get_WIN32_WINNT)

    get_WIN32_WINNT(ZMQ_WIN32_WINNT_DEFAULT)
    message(STATUS "Detected _WIN32_WINNT from CMAKE_SYSTEM_VERSION: ${ZMQ_WIN32_WINNT_DEFAULT}")

    # TODO limit _WIN32_WINNT to the actual Windows SDK version, which might be different from the default version installed with Visual Studio
    if(MSVC_VERSION STREQUAL "1500" AND CMAKE_SYSTEM_VERSION VERSION_GREATER "6.0")
        set(ZMQ_WIN32_WINNT_LIMIT "0x0600")
    elseif(MSVC_VERSION STREQUAL "1600" AND CMAKE_SYSTEM_VERSION VERSION_GREATER "6.1")
        set(ZMQ_WIN32_WINNT_LIMIT "0x0601")
    elseif(MSVC_VERSION STREQUAL "1700" AND CMAKE_SYSTEM_VERSION VERSION_GREATER "6.1")
        set(ZMQ_WIN32_WINNT_LIMIT "0x0601")
    elseif(MSVC_VERSION STREQUAL "1800" AND CMAKE_SYSTEM_VERSION VERSION_GREATER "6.2")
        set(ZMQ_WIN32_WINNT_LIMIT "0x0602")
    endif()
    if(ZMQ_WIN32_WINNT_LIMIT)
        message(STATUS "Mismatch of Visual Studio Version (${MSVC_VERSION}) and CMAKE_SYSTEM_VERSION (${CMAKE_SYSTEM_VERSION}), limiting _WIN32_WINNT to ${ZMQ_WIN32_WINNT_LIMIT}, you may override this by setting ZMQ_WIN32_WINNT")
        set(ZMQ_WIN32_WINNT_DEFAULT "${ZMQ_WIN32_WINNT_LIMIT}")
    endif()

    set(ZMQ_WIN32_WINNT "${ZMQ_WIN32_WINNT_DEFAULT}" CACHE STRING "Value to set _WIN32_WINNT to for building [default=autodetect from build environment]")

    add_definitions(-D_WIN32_WINNT=${ZMQ_WIN32_WINNT})
endif(WIN32)

###################### BEGIN condition_variable_t selection
if(NOT ZMQ_CV_IMPL)
    # prefer C++11 STL std::condition_variable implementation, if available
    check_include_files(condition_variable ZMQ_HAVE_STL_CONDITION_VARIABLE LANGUAGE CXX)

    if (ZMQ_HAVE_STL_CONDITION_VARIABLE)
        set(ZMQ_CV_IMPL_DEFAULT "stl11")
    else()
        if(WIN32 AND NOT CMAKE_SYSTEM_VERSION VERSION_LESS "6.0")
            # Win32API CONDITION_VARIABLE is supported from Windows Vista only
            set(ZMQ_CV_IMPL_DEFAULT "win32api")
        elseif(CMAKE_USE_PTHREADS_INIT)
            set(ZMQ_CV_IMPL_DEFAULT "pthreads")
        else()
            set(ZMQ_CV_IMPL_DEFAULT "none")
        endif()
    endif()

    # TODO a vxworks implementation also exists, but vxworks is not currently supported with cmake at all
    set(ZMQ_CV_IMPL "${ZMQ_CV_IMPL_DEFAULT}" CACHE STRING "Choose condition_variable_t implementation. Valid values are
       stl11, win32api, pthreads, none [default=autodetect]")
endif()

message(STATUS "Using condition_variable_t implementation: ${ZMQ_CV_IMPL}")
if(ZMQ_CV_IMPL STREQUAL "stl11")
    set(ZMQ_USE_CV_IMPL_STL11 1)
elseif(ZMQ_CV_IMPL STREQUAL "win32api")
    set(ZMQ_USE_CV_IMPL_WIN32API 1)
elseif(ZMQ_CV_IMPL STREQUAL "pthreads")
    set(ZMQ_USE_CV_IMPL_PTHREADS 1)
elseif(ZMQ_CV_IMPL STREQUAL "none")
    set(ZMQ_USE_CV_IMPL_NONE 1)
else()
    message(ERROR "Unknown value for ZMQ_CV_IMPL: ${ZMQ_CV_IMPL}")
endif()
###################### END condition_variable_t selection

if(CMAKE_SYSTEM_NAME STREQUAL "WindowsStore" AND CMAKE_SYSTEM_VERSION STREQUAL "10.0")
  set(ZMQ_HAVE_WINDOWS_UWP ON)
endif()
if(NOT MSVC)
  check_include_files(ifaddrs.h ZMQ_HAVE_IFADDRS)
  check_include_files(sys/uio.h ZMQ_HAVE_UIO)
  check_include_files(sys/eventfd.h ZMQ_HAVE_EVENTFD)
  if(ZMQ_HAVE_EVENTFD AND NOT CMAKE_CROSSCOMPILING)
    zmq_check_efd_cloexec()
  endif()
endif()

if(ZMQ_HAVE_WINDOWS)
  # Cannot use check_library_exists because the symbol is always declared as char(*)(void)
  set(CMAKE_REQUIRED_LIBRARIES "ws2_32.lib")
  check_cxx_symbol_exists(WSAStartup "winsock2.h" HAVE_WS2_32)

  set(CMAKE_REQUIRED_LIBRARIES "rpcrt4.lib")
  check_cxx_symbol_exists(UuidCreateSequential "rpc.h" HAVE_RPCRT4)

  set(CMAKE_REQUIRED_LIBRARIES "iphlpapi.lib")
  check_cxx_symbol_exists(GetAdaptersAddresses "winsock2.h;iphlpapi.h" HAVE_IPHLAPI)

  set(CMAKE_REQUIRED_LIBRARIES "")
  # TODO: This not the symbol we're looking for. What is the symbol?
  check_library_exists(ws2 fopen "" HAVE_WS2)
else()
  check_cxx_symbol_exists(SO_PEERCRED sys/socket.h ZMQ_HAVE_SO_PEERCRED)
  check_cxx_symbol_exists(LOCAL_PEERCRED sys/socket.h ZMQ_HAVE_LOCAL_PEERCRED)
endif()

if(NOT MINGW)
  find_library(RT_LIBRARY rt)
  if(RT_LIBRARY)
    set(pkg_config_libs_private "${pkg_config_libs_private} -lrt")
  endif()
endif()

find_package(Threads)

if(WIN32 AND NOT CYGWIN)
  if(NOT HAVE_WS2_32 AND NOT HAVE_WS2)
    message(FATAL_ERROR "Cannot link to ws2_32 or ws2")
  endif()

  if(NOT HAVE_RPCRT4)
    message(FATAL_ERROR "Cannot link to rpcrt4")
  endif()

  if(NOT HAVE_IPHLAPI)
    message(FATAL_ERROR "Cannot link to iphlapi")
  endif()
endif()

if(NOT MSVC)
  set(CMAKE_REQUIRED_LIBRARIES rt)
  check_cxx_symbol_exists(clock_gettime time.h HAVE_CLOCK_GETTIME)
  set(CMAKE_REQUIRED_LIBRARIES)

  check_cxx_symbol_exists(fork unistd.h HAVE_FORK)
  check_cxx_symbol_exists(gethrtimei sys/time.h HAVE_GETHRTIME)
  check_cxx_symbol_exists(mkdtemp stdlib.h HAVE_MKDTEMP)
  check_cxx_symbol_exists(accept4 sys/socket.h HAVE_ACCEPT4)
  check_cxx_symbol_exists(strnlen string.h HAVE_STRNLEN)
endif()

add_definitions(-D_REENTRANT -D_THREAD_SAFE)
add_definitions(-DZMQ_CUSTOM_PLATFORM_HPP)

option(ENABLE_EVENTFD "Enable/disable eventfd" ZMQ_HAVE_EVENTFD)

macro(zmq_check_cxx_flag_prepend flag)
  check_cxx_compiler_flag("${flag}" HAVE_FLAG_${flag})

  if(HAVE_FLAG_${flag})
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}")
  endif()
endmacro()

option(ENABLE_ANALYSIS "Build with static analysis(make take very long)" OFF)

if(MSVC)
  if(ENABLE_ANALYSIS)
    zmq_check_cxx_flag_prepend("/W4")

    zmq_check_cxx_flag_prepend("/analyze")

    # C++11/14/17-specific, but maybe possible via conditional defines
    zmq_check_cxx_flag_prepend("/wd26440") # Function '...' can be declared 'noexcept'
    zmq_check_cxx_flag_prepend("/wd26432") # If you define or delete any default operation in the type '...', define or delete them all
    zmq_check_cxx_flag_prepend("/wd26439") # This kind of function may not throw. Declare it 'noexcept'
    zmq_check_cxx_flag_prepend("/wd26447") # The function is declared 'noexcept' but calls function '...' which may throw exceptions
    zmq_check_cxx_flag_prepend("/wd26433") # Function '...' should be marked with 'override'
    zmq_check_cxx_flag_prepend("/wd26409") # Avoid calling new and delete explicitly, use std::make_unique<T> instead
    # Requires GSL
    zmq_check_cxx_flag_prepend("/wd26429") # Symbol '...' is never tested for nullness, it can be marked as not_null
    zmq_check_cxx_flag_prepend("/wd26446") # Prefer to use gsl::at()
    zmq_check_cxx_flag_prepend("/wd26481") # Don't use pointer arithmetic. Use span instead
    zmq_check_cxx_flag_prepend("/wd26472") # Don't use a static_cast for arithmetic conversions. Use brace initialization, gsl::narrow_cast or gsl::narow
    zmq_check_cxx_flag_prepend("/wd26448") # Consider using gsl::finally if final action is intended
    zmq_check_cxx_flag_prepend("/wd26400") # Do not assign the result of an allocation or a function call with an owner<T> return value to a raw pointer, use owner<T> instead
    zmq_check_cxx_flag_prepend("/wd26485") # Expression '...': No array to pointer decay(bounds.3)
  else()
    zmq_check_cxx_flag_prepend("/W3")
  endif()

  if(MSVC_IDE)
    set(MSVC_TOOLSET "-${CMAKE_VS_PLATFORM_TOOLSET}")
  else()
    set(MSVC_TOOLSET "")
  endif()
else()
  zmq_check_cxx_flag_prepend("-Wall")
endif()

if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
  zmq_check_cxx_flag_prepend("-Wextra")
endif()

option(LIBZMQ_PEDANTIC "" ON)
option(LIBZMQ_WERROR "" OFF)

# TODO: why is -Wno-long-long defined differently than in configure.ac?
if(NOT MSVC)
  zmq_check_cxx_flag_prepend("-Wno-long-long")
  zmq_check_cxx_flag_prepend("-Wno-uninitialized")

  if(LIBZMQ_PEDANTIC)
    zmq_check_cxx_flag_prepend("-pedantic")

    if(${CMAKE_CXX_COMPILER_ID} MATCHES "Intel")
      zmq_check_cxx_flag_prepend("-strict-ansi")
    endif()

    if(${CMAKE_CXX_COMPILER_ID} MATCHES "SunPro")
      zmq_check_cxx_flag_prepend("-compat=5")
    endif()
  endif()
endif()

if(LIBZMQ_WERROR)
  if(MSVC)
    zmq_check_cxx_flag_prepend("/WX")
  else()
    zmq_check_cxx_flag_prepend("-Werror")
    if(NOT "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
      zmq_check_cxx_flag_prepend("-errwarn=%all")
    endif()
  endif()
endif()

if(CMAKE_SYSTEM_PROCESSOR MATCHES "^sparc")
  zmq_check_cxx_flag_prepend("-mcpu=v9")
endif()

if(${CMAKE_CXX_COMPILER_ID} MATCHES "SunPro")
  zmq_check_cxx_flag_prepend("-features=zla")
endif()

if(CMAKE_SYSTEM_NAME MATCHES "SunOS" OR CMAKE_SYSTEM_NAME MATCHES "NetBSD" OR CMAKE_SYSTEM_NAME MATCHES "QNX")
  message(STATUS "Checking whether atomic operations can be used")
  check_c_source_compiles(
  "\
  #include <atomic.h> \
  \
  int main() \
  { \
    uint32_t value; \
    atomic_cas_32(&value, 0, 0); \
    return 0; \
  } \
  "
  HAVE_ATOMIC_H)

  if(NOT HAVE_ATOMIC_H)
    set(ZMQ_FORCE_MUTEXES 1)
  endif()
endif()

if(NOT ANDROID)
    zmq_check_noexcept()
endif()

#-----------------------------------------------------------------------------
if(NOT CMAKE_CROSSCOMPILING AND NOT MSVC)
  zmq_check_sock_cloexec()
  zmq_check_o_cloexec()
  zmq_check_so_bindtodevice()
  zmq_check_so_keepalive()
  zmq_check_tcp_keepcnt()
  zmq_check_tcp_keepidle()
  zmq_check_tcp_keepintvl()
  zmq_check_tcp_keepalive()
  zmq_check_tcp_tipc()
  zmq_check_pthread_setname()
  zmq_check_pthread_setaffinity()
  zmq_check_getrandom()
endif()

if(CMAKE_SYSTEM_NAME MATCHES "Linux"
  OR CMAKE_SYSTEM_NAME MATCHES "GNU/kFreeBSD"
  OR CMAKE_SYSTEM_NAME MATCHES "GNU/Hurd"
  OR CYGWIN)
  add_definitions(-D_GNU_SOURCE)
elseif(CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
  add_definitions(-D__BSD_VISIBLE)
elseif(CMAKE_SYSTEM_NAME MATCHES "NetBSD")
  add_definitions(-D_NETBSD_SOURCE)
elseif(CMAKE_SYSTEM_NAME MATCHES "OpenBSD")
  add_definitions(-D_OPENBSD_SOURCE)
elseif(CMAKE_SYSTEM_NAME MATCHES "SunOS")
  add_definitions(-D_PTHREADS)
elseif(CMAKE_SYSTEM_NAME MATCHES "HP-UX")
  add_definitions(-D_POSIX_C_SOURCE=200112L)
  zmq_check_cxx_flag_prepend(-Ae)
elseif(CMAKE_SYSTEM_NAME MATCHES "Darwin")
  add_definitions(-D_DARWIN_C_SOURCE)
endif()

find_package(AsciiDoc)

cmake_dependent_option(WITH_DOC "Build Reference Guide documentation(requires DocBook)" ON
  "ASCIIDOC_FOUND;NOT WIN32" OFF)  # Do not build docs on Windows due to issues with symlinks

if(MSVC)
  if(WITH_OPENPGM)
    #set(OPENPGM_ROOT "" CACHE PATH "Location of OpenPGM")
    set(OPENPGM_VERSION_MAJOR 5)
    set(OPENPGM_VERSION_MINOR 2)
    set(OPENPGM_VERSION_MICRO 122)
    if(CMAKE_CL_64)
      find_path(OPENPGM_ROOT include/pgm/pgm.h
          PATHS
          "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Miru\\OpenPGM ${OPENPGM_VERSION_MAJOR}.${OPENPGM_VERSION_MINOR}.${OPENPGM_VERSION_MICRO}]"
          NO_DEFAULT_PATH)
      message(STATUS "OpenPGM x64 detected - ${OPENPGM_ROOT}")
    else()
      find_path(OPENPGM_ROOT include/pgm/pgm.h
          PATHS
          "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Wow6432Node\\Miru\\OpenPGM ${OPENPGM_VERSION_MAJOR}.${OPENPGM_VERSION_MINOR}.${OPENPGM_VERSION_MICRO}]"
          "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Miru\\OpenPGM ${OPENPGM_VERSION_MAJOR}.${OPENPGM_VERSION_MINOR}.${OPENPGM_VERSION_MICRO}]"
          NO_DEFAULT_PATH)
      message(STATUS "OpenPGM x86 detected - ${OPENPGM_ROOT}")
    endif()
    set(OPENPGM_INCLUDE_DIRS ${OPENPGM_ROOT}/include)
    set(OPENPGM_LIBRARY_DIRS ${OPENPGM_ROOT}/lib)
    set(OPENPGM_LIBRARIES
      optimized libpgm${MSVC_TOOLSET}-mt-${OPENPGM_VERSION_MAJOR}_${OPENPGM_VERSION_MINOR}_${OPENPGM_VERSION_MICRO}.lib
      debug libpgm${MSVC_TOOLSET}-mt-gd-${OPENPGM_VERSION_MAJOR}_${OPENPGM_VERSION_MINOR}_${OPENPGM_VERSION_MICRO}.lib)
  endif()
else()
  if(WITH_OPENPGM)
    #  message(FATAL_ERROR "WITH_OPENPGM not implemented")

    if(NOT OPENPGM_PKGCONFIG_NAME)
      set(OPENPGM_PKGCONFIG_NAME "openpgm-5.2")
    endif()

    set(OPENPGM_PKGCONFIG_NAME ${OPENPGM_PKGCONFIG_NAME} CACHE STRING
      "Name pkg-config shall use to find openpgm libraries and include paths"
      FORCE)

    find_package(PkgConfig)
    pkg_check_modules(OPENPGM  ${OPENPGM_PKGCONFIG_NAME})

    if(OPENPGM_FOUND)
      message(STATUS ${OPENPGM_PKGCONFIG_NAME}" found")
      set(pkg_config_names_private "${pkg_config_names_private} ${OPENPGM_PKGCONFIG_NAME}")
    else()
      message(FATAL_ERROR
        ${OPENPGM_PKGCONFIG_NAME}"  not found. openpgm is searchd via `pkg-config ${OPENPGM_PKGCONFIG_NAME}`. Consider providing a valid OPENPGM_PKGCONFIG_NAME")
    endif()

    # DSO symbol visibility for openpgm
    if(HAVE_FLAG_VISIBILITY_HIDDEN)

    elseif(HAVE_FLAG_LDSCOPE_HIDDEN)

    endif()
  endif()
endif()


#-----------------------------------------------------------------------------
# force off-tree build

if(${CMAKE_CURRENT_SOURCE_DIR} STREQUAL ${CMAKE_CURRENT_BINARY_DIR})
  message(FATAL_ERROR "CMake generation is not allowed within the source directory! \
    Remove the CMakeCache.txt file and try again from another folder, e.g.: \
    \
      rm CMakeCache.txt \
      mkdir cmake-make \
      cd cmake-make \
      cmake ..")
endif()

#-----------------------------------------------------------------------------
# default to Release build

if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
  # CMAKE_BUILD_TYPE is not used for multi-configuration generators like Visual Studio/XCode
  # which instead use CMAKE_CONFIGURATION_TYPES
  set(CMAKE_BUILD_TYPE Release CACHE STRING
    "Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel."
    FORCE)
endif()

#-----------------------------------------------------------------------------
# output directories

zmq_set_with_default(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${ZeroMQ_BINARY_DIR}/bin")
if(UNIX)
  set(zmq_library_directory "lib")
else()
  set(zmq_library_directory "bin")
endif()
zmq_set_with_default(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${ZeroMQ_BINARY_DIR}/${zmq_library_directory}")
zmq_set_with_default(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${ZeroMQ_BINARY_DIR}/lib")

#-----------------------------------------------------------------------------
# platform specifics

if(WIN32)
  # Socket limit is 16K(can be raised arbitrarily)
  add_definitions(-DFD_SETSIZE=16384)
  add_definitions(-D_CRT_SECURE_NO_WARNINGS)
  add_definitions(-D_WINSOCK_DEPRECATED_NO_WARNINGS)
endif()

if(MSVC)
  # Parallel make.
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP")
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /MP")

  # Compile the static lib with debug information included
  # note: we assume here that the default flags contain some /Z flag
  string(REGEX REPLACE "/Z.[^:]" "/Z7" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}")
  string(REGEX REPLACE "/Z.[^:]" "/Z7" CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")

  # Optimization flags.
  # http://msdn.microsoft.com/en-us/magazine/cc301698.aspx
  if(NOT ${CMAKE_BUILD_TYPE} MATCHES "Debug")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /GL")
    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /LTCG")
    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /LTCG")
    set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} /LTCG")
  endif()
endif()


#-----------------------------------------------------------------------------
# source files

set(cxx-sources
  precompiled.cpp
  address.cpp
  client.cpp
  clock.cpp
  ctx.cpp
  curve_mechanism_base.cpp
  curve_client.cpp
  curve_server.cpp
  dealer.cpp
  devpoll.cpp
  dgram.cpp
  dist.cpp
  endpoint.cpp
  epoll.cpp
  err.cpp
  fq.cpp
  io_object.cpp
  io_thread.cpp
  ip.cpp
  ipc_address.cpp
  ipc_connecter.cpp
  ipc_listener.cpp
  kqueue.cpp
  lb.cpp
  mailbox.cpp
  mailbox_safe.cpp
  mechanism.cpp
  mechanism_base.cpp
  metadata.cpp
  msg.cpp
  mtrie.cpp
  norm_engine.cpp
  object.cpp
  options.cpp
  own.cpp
  null_mechanism.cpp
  pair.cpp
  pgm_receiver.cpp
  pgm_sender.cpp
  pgm_socket.cpp
  pipe.cpp
  plain_client.cpp
  plain_server.cpp
  poll.cpp
  poller_base.cpp
  polling_util.cpp
  pollset.cpp
  proxy.cpp
  pub.cpp
  pull.cpp
  push.cpp
  random.cpp
  raw_encoder.cpp
  raw_decoder.cpp
  raw_engine.cpp
  reaper.cpp
  rep.cpp
  req.cpp
  router.cpp
  select.cpp
  server.cpp
  session_base.cpp
  signaler.cpp
  socket_base.cpp
  socks.cpp
  socks_connecter.cpp
  stream.cpp
  stream_engine_base.cpp
  sub.cpp
  tcp.cpp
  tcp_address.cpp
  tcp_connecter.cpp
  tcp_listener.cpp
  thread.cpp
  trie.cpp
  radix_tree.cpp
  v1_decoder.cpp
  v1_encoder.cpp
  v2_decoder.cpp
  v2_encoder.cpp
  xpub.cpp
  xsub.cpp
  zmq.cpp
  zmq_utils.cpp
  decoder_allocators.cpp
  socket_poller.cpp
  timers.cpp
  config.hpp
  radio.cpp
  dish.cpp
  udp_engine.cpp
  udp_address.cpp
  scatter.cpp
  gather.cpp
  ip_resolver.cpp
  zap_client.cpp
  ws_address.cpp
  ws_connecter.cpp
  ws_decoder.cpp
  ws_encoder.cpp
  ws_engine.cpp
  ws_listener.cpp
  zmtp_engine.cpp
  # at least for VS, the header files must also be listed
  address.hpp
  array.hpp
  atomic_counter.hpp
  atomic_ptr.hpp
  blob.hpp
  client.hpp
  clock.hpp
  command.hpp
  condition_variable.hpp
  config.hpp
  ctx.hpp
  curve_client.hpp
  curve_client_tools.hpp
  curve_mechanism_base.hpp
  curve_server.hpp
  dbuffer.hpp
  dealer.hpp
  decoder.hpp
  decoder_allocators.hpp
  devpoll.hpp
  dgram.hpp
  dish.hpp
  dist.hpp
  encoder.hpp
  endpoint.hpp
  epoll.hpp
  err.hpp
  fd.hpp
  fq.hpp
  gather.hpp
  generic_mtrie.hpp
  generic_mtrie_impl.hpp
  gssapi_client.hpp
  gssapi_mechanism_base.hpp
  gssapi_server.hpp
  i_decoder.hpp
  i_encoder.hpp
  i_engine.hpp
  i_mailbox.hpp
  i_poll_events.hpp
  io_object.hpp
  io_thread.hpp
  ip.hpp
  ipc_address.hpp
  ipc_connecter.hpp
  ipc_listener.hpp
  kqueue.hpp
  lb.hpp
  likely.hpp
  macros.hpp
  mailbox.hpp
  mailbox_safe.hpp
  mechanism.hpp
  mechanism_base.hpp
  metadata.hpp
  msg.hpp
  mtrie.hpp
  mutex.hpp
  norm_engine.hpp
  null_mechanism.hpp
  object.hpp
  options.hpp
  own.hpp
  pair.hpp
  pgm_receiver.hpp
  pgm_sender.hpp
  pgm_socket.hpp
  pipe.hpp
  plain_client.hpp
  plain_common.hpp
  plain_server.hpp
  poll.hpp
  poller.hpp
  poller_base.hpp
  polling_util.hpp
  pollset.hpp
  precompiled.hpp
  proxy.hpp
  pub.hpp
  pull.hpp
  push.hpp
  radio.hpp
  random.hpp
  raw_decoder.hpp
  raw_encoder.hpp
  raw_engine.hpp
  reaper.hpp
  rep.hpp
  req.hpp
  router.hpp
  scatter.hpp
  secure_allocator.hpp
  select.hpp
  server.hpp
  session_base.hpp
  signaler.hpp
  socket_base.hpp
  socket_poller.hpp
  socks.hpp
  socks_connecter.hpp
  stdint.hpp
  stream.hpp
  stream_engine_base.hpp
  stream_connecter_base.hpp
  stream_connecter_base.cpp
  stream_listener_base.hpp
  stream_listener_base.cpp
  sub.hpp
  tcp.hpp
  tcp_address.hpp
  tcp_connecter.hpp
  tcp_listener.hpp
  thread.hpp
  timers.hpp
  tipc_address.hpp
  tipc_connecter.hpp
  tipc_listener.hpp
  trie.hpp
  udp_address.hpp
  udp_engine.hpp
  v1_decoder.hpp
  v1_encoder.hpp
  v2_decoder.hpp
  v2_encoder.hpp
  v2_protocol.hpp
  vmci.hpp
  vmci_address.hpp
  vmci_connecter.hpp
  vmci_listener.hpp
  windows.hpp
  wire.hpp
  ws_address.hpp
  ws_connecter.hpp
  ws_decoder.hpp
  ws_encoder.hpp
  ws_engine.hpp
  ws_listener.hpp
  ws_protocol.hpp
  xpub.hpp
  xsub.hpp
  ypipe.hpp
  ypipe_base.hpp
  ypipe_conflate.hpp
  yqueue.hpp
  zap_client.hpp
  zmtp_engine.hpp
)

if(MINGW)
  # Generate the right type when using -m32 or -m64
  macro(set_rc_arch rc_target)
    set(CMAKE_RC_COMPILER_INIT windres)
    enable_language(RC)
    set(CMAKE_RC_COMPILE_OBJECT
      "<CMAKE_RC_COMPILER> <FLAGS> -O coff --target=${rc_target} <DEFINES> -i <SOURCE> -o <OBJECT>")
  endmacro()

  if(NOT CMAKE_SYSTEM_PROCESSOR)
    set(CMAKE_SYSTEM_PROCESSOR ${CMAKE_HOST_SYSTEM_PROCESSOR})
  endif()

  # Also happens on x86_64 systems...what a worthless variable
  if(CMAKE_SYSTEM_PROCESSOR MATCHES "i386"
    OR CMAKE_SYSTEM_PROCESSOR MATCHES "i486"
    OR CMAKE_SYSTEM_PROCESSOR MATCHES "i586"
    OR CMAKE_SYSTEM_PROCESSOR MATCHES "i686"
    OR CMAKE_SYSTEM_PROCESSOR MATCHES "x86"
    OR CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64"
    OR CMAKE_SYSTEM_PROCESSOR MATCHES "amd64")

    if(CMAKE_SIZEOF_VOID_P EQUAL 8)
      set_rc_arch("pe-x86-64")
    else()
      set_rc_arch("pe-i386")
    endif()
  endif()
endif()

set(public_headers
  include/zmq.h
  include/zmq_utils.h)

set(readme-docs
  AUTHORS
  COPYING
  COPYING.LESSER
  NEWS)

#-----------------------------------------------------------------------------
# optional modules

if(WITH_OPENPGM)
  add_definitions(-DZMQ_HAVE_OPENPGM)
  include_directories(${OPENPGM_INCLUDE_DIRS})
  link_directories(${OPENPGM_LIBRARY_DIRS})
  set(OPTIONAL_LIBRARIES ${OPENPGM_LIBRARIES})
endif()

if(WITH_VMCI)
  add_definitions(-DZMQ_HAVE_VMCI)
  include_directories(${VMCI_INCLUDE_DIRS})
  list(APPEND cxx-sources vmci_address.cpp vmci_connecter.cpp vmci_listener.cpp vmci.cpp)
endif()

if(ZMQ_HAVE_TIPC)
  add_definitions(-DZMQ_HAVE_TIPC)
  list(APPEND cxx-sources tipc_address.cpp tipc_connecter.cpp tipc_listener.cpp)
endif()

#-----------------------------------------------------------------------------
# source generators

foreach(source ${cxx-sources})
  list(APPEND sources ${CMAKE_CURRENT_SOURCE_DIR}/src/${source})
endforeach()

configure_file(${CMAKE_CURRENT_SOURCE_DIR}/src/version.rc.in ${CMAKE_CURRENT_BINARY_DIR}/version.rc)

#   Delete any src/platform.hpp left by configure
file(REMOVE ${CMAKE_CURRENT_SOURCE_DIR}/src/platform.hpp)

configure_file(${CMAKE_CURRENT_SOURCE_DIR}/builds/cmake/platform.hpp.in ${CMAKE_CURRENT_BINARY_DIR}/platform.hpp)
list(APPEND sources ${CMAKE_CURRENT_BINARY_DIR}/platform.hpp)

set(prefix ${CMAKE_INSTALL_PREFIX})
set(exec_prefix ${prefix})
set(libdir ${prefix}/lib)
set(includedir ${prefix}/include)
set(VERSION ${ZMQ_VERSION_MAJOR}.${ZMQ_VERSION_MINOR}.${ZMQ_VERSION_PATCH})
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/src/libzmq.pc.in ${CMAKE_CURRENT_BINARY_DIR}/libzmq.pc @ONLY)
set(zmq-pkgconfig ${CMAKE_CURRENT_BINARY_DIR}/libzmq.pc)

if(NOT ZMQ_BUILD_FRAMEWORK)
  install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libzmq.pc DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
endif()

if(MSVC)
  if(CMAKE_CL_64)
    set(nsis-template ${CMAKE_CURRENT_SOURCE_DIR}/builds/cmake/NSIS.template64.in)
  else()
    set(nsis-template ${CMAKE_CURRENT_SOURCE_DIR}/builds/cmake/NSIS.template32.in)
  endif()

  add_custom_command(
    OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/NSIS.template.in
    COMMAND ${CMAKE_COMMAND}
    ARGS -E
    copy
    ${nsis-template}
    ${CMAKE_CURRENT_BINARY_DIR}/NSIS.template.in
    DEPENDS ${nsis-template})
endif()

option (WITH_DOCS "Build html docs" ON)
if (WITH_DOCS)
  file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/doc)
  file(GLOB docs RELATIVE ${CMAKE_CURRENT_BINARY_DIR}/ "${CMAKE_CURRENT_SOURCE_DIR}/doc/*.txt")
  set(html-docs)
  foreach(txt ${docs})
    string(REGEX REPLACE ".*/(.*)\\.txt" "\\1.html" html ${txt})
    set(src ${txt})
    set(dst doc/${html})
    if(WITH_DOC)
      add_custom_command(
        OUTPUT  ${dst}
        COMMAND ${ASCIIDOC_EXECUTABLE}
        -d manpage
        -b xhtml11
        -f ${CMAKE_CURRENT_SOURCE_DIR}/doc/asciidoc.conf
        -azmq_version=${ZMQ_VERSION}
        -o ${dst}
        ${src}
        DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${src}
        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
        COMMENT "Generating ${html}")
      list(APPEND html-docs ${CMAKE_CURRENT_BINARY_DIR}/${dst})
    endif()
  endforeach()
endif()

if(ZMQ_BUILD_FRAMEWORK)
  add_custom_command(
  TARGET libzmq
  POST_BUILD
  COMMAND ${CMAKE_COMMAND}
  ARGS -E make_directory "${CMAKE_LIBRARY_OUTPUT_PATH}/ZeroMQ.framework/Versions/${ZMQ_VERSION}/MacOS"
  COMMENT "Perf tools")
endif()

option(ENABLE_PRECOMPILED "Enable precompiled headers, if possible" ON)
if(MSVC AND ENABLE_PRECOMPILED)
  # default for all sources is to use precompiled headers
  foreach(source ${sources})
    # C and C++ can not use the same precompiled header
    if(${source} MATCHES ".cpp$" AND NOT ${source} STREQUAL "${CMAKE_CURRENT_SOURCE_DIR}/src/precompiled.cpp")
      set_source_files_properties(${source}
        PROPERTIES
        COMPILE_FLAGS "/Yuprecompiled.hpp"
        OBJECT_DEPENDS precompiled.hpp)
    endif()
  endforeach()
  # create precompiled header
  set_source_files_properties(${CMAKE_CURRENT_SOURCE_DIR}/src/precompiled.cpp
    PROPERTIES
    COMPILE_FLAGS "/Ycprecompiled.hpp"
    OBJECT_OUTPUTS precompiled.hpp)
endif()


#-----------------------------------------------------------------------------
# output
option(BUILD_SHARED "Whether or not to build the shared object"  ON)
option(BUILD_STATIC "Whether or not to build the static archive" ON)

list(APPEND target_outputs "")

if(BUILD_SHARED)
  list(APPEND target_outputs "libzmq")
endif()

if(BUILD_STATIC)
  list(APPEND target_outputs "libzmq-static")
endif()

if(MSVC)
  # Suppress linker warnings caused by #ifdef omission
  # of file content.
  set(CMAKE_STATIC_LINKER_FLAGS "${CMAKE_STATIC_LINKER_FLAGS} /ignore:4221")
  set(PDB_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/bin")
  set(PDB_NAME "libzmq${MSVC_TOOLSET}-mt-gd-${ZMQ_VERSION_MAJOR}_${ZMQ_VERSION_MINOR}_${ZMQ_VERSION_PATCH}")
  function(enable_vs_guideline_checker target)
    set_target_properties(${target} PROPERTIES
      VS_GLOBAL_EnableCppCoreCheck true
      VS_GLOBAL_CodeAnalysisRuleSet CppCoreCheckRules.ruleset
      VS_GLOBAL_RunCodeAnalysis true)
  endfunction()
  if(BUILD_SHARED)
    add_library(libzmq SHARED ${sources} ${public_headers} ${html-docs} ${readme-docs} ${CMAKE_CURRENT_BINARY_DIR}/NSIS.template.in ${CMAKE_CURRENT_BINARY_DIR}/version.rc)
    if(ENABLE_ANALYSIS)
      enable_vs_guideline_checker(libzmq)
    endif()
    set_target_properties(libzmq PROPERTIES
      PUBLIC_HEADER "${public_headers}"
      RELEASE_POSTFIX "${MSVC_TOOLSET}-mt-${ZMQ_VERSION_MAJOR}_${ZMQ_VERSION_MINOR}_${ZMQ_VERSION_PATCH}"
      RELWITHDEBINFO_POSTFIX "${MSVC_TOOLSET}-mt-${ZMQ_VERSION_MAJOR}_${ZMQ_VERSION_MINOR}_${ZMQ_VERSION_PATCH}"
      MINSIZEREL_POSTFIX "${MSVC_TOOLSET}-mt-${ZMQ_VERSION_MAJOR}_${ZMQ_VERSION_MINOR}_${ZMQ_VERSION_PATCH}"
      DEBUG_POSTFIX "${MSVC_TOOLSET}-mt-gd-${ZMQ_VERSION_MAJOR}_${ZMQ_VERSION_MINOR}_${ZMQ_VERSION_PATCH}"
      RUNTIME_OUTPUT_DIRECTORY "${CMAKE_RUNTIME_OUTPUT_DIRECTORY}"
      COMPILE_DEFINITIONS "DLL_EXPORT"
      OUTPUT_NAME "libzmq")
  endif()

  if(BUILD_STATIC)
    add_library(libzmq-static STATIC ${sources} ${CMAKE_CURRENT_BINARY_DIR}/version.rc)
    set_target_properties(libzmq-static PROPERTIES
      PUBLIC_HEADER "${public_headers}"
      RELEASE_POSTFIX "${MSVC_TOOLSET}-mt-s-${ZMQ_VERSION_MAJOR}_${ZMQ_VERSION_MINOR}_${ZMQ_VERSION_PATCH}"
      RELWITHDEBINFO_POSTFIX "${MSVC_TOOLSET}-mt-s-${ZMQ_VERSION_MAJOR}_${ZMQ_VERSION_MINOR}_${ZMQ_VERSION_PATCH}"
      MINSIZEREL_POSTFIX "${MSVC_TOOLSET}-mt-s-${ZMQ_VERSION_MAJOR}_${ZMQ_VERSION_MINOR}_${ZMQ_VERSION_PATCH}"
      DEBUG_POSTFIX "${MSVC_TOOLSET}-mt-sgd-${ZMQ_VERSION_MAJOR}_${ZMQ_VERSION_MINOR}_${ZMQ_VERSION_PATCH}"
      COMPILE_FLAGS "/DZMQ_STATIC"
      OUTPUT_NAME "libzmq")
  endif()
else()
  # avoid building everything twice for shared + static
  # only on *nix, as Windows needs different preprocessor defines in static builds
  if(NOT MINGW)
    add_library(objects OBJECT ${sources})
    set_property(TARGET objects PROPERTY POSITION_INDEPENDENT_CODE ON)
    target_include_directories(objects
      PUBLIC
      $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
      $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>
      $<INSTALL_INTERFACE:include>)
  endif()

  if(BUILD_SHARED)
    if(MINGW)
      add_library(libzmq SHARED ${sources} ${public_headers} ${html-docs} ${readme-docs} ${zmq-pkgconfig} ${CMAKE_CURRENT_BINARY_DIR}/version.rc)
    else()
      add_library(libzmq SHARED $<TARGET_OBJECTS:objects> ${public_headers} ${html-docs} ${readme-docs} ${zmq-pkgconfig} ${CMAKE_CURRENT_BINARY_DIR}/version.rc)
    endif()
    # NOTE: the SOVERSION and VERSION MUST be the same as the one generated by libtool! It is NOT the same as the version of the package.
    set_target_properties(libzmq PROPERTIES
      COMPILE_DEFINITIONS "DLL_EXPORT"
      PUBLIC_HEADER "${public_headers}"
      VERSION "5.2.3"
      SOVERSION "5"
      OUTPUT_NAME "zmq"
      PREFIX "lib")
    if(ZMQ_BUILD_FRAMEWORK)
      set_target_properties(libzmq PROPERTIES
        FRAMEWORK TRUE
        MACOSX_FRAMEWORK_IDENTIFIER "org.zeromq.libzmq"
        MACOSX_FRAMEWORK_SHORT_VERSION_STRING ${ZMQ_VERSION}
        MACOSX_FRAMEWORK_BUNDLE_VERSION ${ZMQ_VERSION})
      set_source_files_properties(${html-docs} PROPERTIES
        MACOSX_PACKAGE_LOCATION doc)
      set_source_files_properties(${readme-docs} PROPERTIES
        MACOSX_PACKAGE_LOCATION etc)
      set_source_files_properties(${zmq-pkgconfig} PROPERTIES
        MACOSX_PACKAGE_LOCATION lib/pkgconfig)
    endif()
  endif()

  if(BUILD_STATIC)
    if(MINGW)
      add_library(libzmq-static STATIC ${sources} ${public_headers} ${html-docs}
        ${readme-docs} ${zmq-pkgconfig} ${CMAKE_CURRENT_BINARY_DIR}/version.rc)
    else()
      add_library(libzmq-static STATIC $<TARGET_OBJECTS:objects> ${public_headers}
        ${html-docs} ${readme-docs} ${zmq-pkgconfig} ${CMAKE_CURRENT_BINARY_DIR}/version.rc)
    endif()
    if(CMAKE_SYSTEM_NAME MATCHES "QNX")
      target_link_libraries(libzmq-static m)
    endif()
    set_target_properties(libzmq-static PROPERTIES
      PUBLIC_HEADER "${public_headers}"
      OUTPUT_NAME "zmq"
      PREFIX "lib")
  endif()
endif()

if(BUILD_STATIC)
  target_compile_definitions(libzmq-static
    PUBLIC ZMQ_STATIC)
endif()

foreach(target ${target_outputs})
  target_include_directories(${target}
    PUBLIC
      $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
      $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>
      $<INSTALL_INTERFACE:include>)
endforeach()

if(BUILD_SHARED)
  target_link_libraries(libzmq ${OPTIONAL_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})

  if(SODIUM_FOUND)
    target_link_libraries(libzmq ${SODIUM_LIBRARIES})
    # On Solaris, libsodium depends on libssp
    if(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
      target_link_libraries(libzmq ssp)
    endif()
  endif()

  if(HAVE_WS2_32)
    target_link_libraries(libzmq ws2_32)
  elseif(HAVE_WS2)
    target_link_libraries(libzmq ws2)
  endif()

  if(HAVE_RPCRT4)
    target_link_libraries(libzmq rpcrt4)
  endif()

  if(HAVE_IPHLAPI)
    target_link_libraries(libzmq iphlpapi)
  endif()

  if(RT_LIBRARY)
    target_link_libraries(libzmq -lrt)
  endif()
endif()

if(BUILD_STATIC)
  target_link_libraries(libzmq-static ${OPTIONAL_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})

  if(SODIUM_FOUND)
    target_link_libraries(libzmq-static ${SODIUM_LIBRARIES})
    # On Solaris, libsodium depends on libssp
    if(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
      target_link_libraries(libzmq-static ssp)
    endif()
  endif()

  if(HAVE_WS2_32)
    target_link_libraries(libzmq-static ws2_32)
  elseif(HAVE_WS2)
    target_link_libraries(libzmq-static ws2)
  endif()

  if(HAVE_RPCRT4)
    target_link_libraries(libzmq-static rpcrt4)
  endif()

  if(HAVE_IPHLAPI)
    target_link_libraries(libzmq-static iphlpapi)
  endif()

  if(RT_LIBRARY)
    target_link_libraries(libzmq-static -lrt)
  endif()

  if(CMAKE_SYSTEM_NAME MATCHES "QNX")
    add_definitions(-DUNITY_EXCLUDE_MATH_H)
  endif()
endif()

if(BUILD_SHARED)
  set(perf-tools
    local_lat
    remote_lat
    local_thr
    remote_thr
    inproc_lat
    inproc_thr
    proxy_thr)

  if(NOT CMAKE_BUILD_TYPE STREQUAL "Debug") # Why?
    option(WITH_PERF_TOOL "Build with perf-tools" ON)
  else()
    option(WITH_PERF_TOOL "Build with perf-tools" OFF)
  endif()

  if(WITH_PERF_TOOL)
    foreach(perf-tool ${perf-tools})
      add_executable(${perf-tool} perf/${perf-tool}.cpp)
      target_link_libraries(${perf-tool} libzmq)

      if(ZMQ_BUILD_FRAMEWORK)
        # Copy perf-tools binaries into Framework
        add_custom_command(
          TARGET libzmq ${perf-tool}
          POST_BUILD
          COMMAND ${CMAKE_COMMAND}
          ARGS -E copy "$<TARGET_FILE:${perf-tool}>" "${LIBRARY_OUTPUT_PATH}/ZeroMQ.framework/Versions/${ZMQ_VERSION_STRING}/MacOS/${perf-tool}"
          VERBATIM
          COMMENT "Perf tools")
      else()
        install(TARGETS ${perf-tool}
          RUNTIME DESTINATION bin
          COMPONENT PerfTools)
      endif()
    endforeach()

    if(BUILD_STATIC)
      add_executable(benchmark_radix_tree perf/benchmark_radix_tree.cpp)
      target_link_libraries(benchmark_radix_tree libzmq-static)
      target_include_directories(benchmark_radix_tree
        PUBLIC
        "${CMAKE_CURRENT_LIST_DIR}/src")
    endif()

  endif()
elseif(WITH_PERF_TOOL)
  message(FATAL_ERROR "Shared library disabled - perf-tools unavailable.")
endif()

#-----------------------------------------------------------------------------
# tests

option(BUILD_TESTS "Whether or not to build the tests" ON)

set(ZMQ_BUILD_TESTS ${BUILD_TESTS} CACHE BOOL "Build the tests for ZeroMQ")

if(ZMQ_BUILD_TESTS)
  enable_testing() # Enable testing only works in root scope
  add_subdirectory(tests)
  if(BUILD_STATIC)
    add_subdirectory(unittests)
  else()
    message(WARNING "Not building unit tests, since BUILD_STATIC is not enabled")
  endif()
endif()

#-----------------------------------------------------------------------------
# installer

if(MSVC AND(BUILD_SHARED OR BUILD_STATIC))
  install(TARGETS ${target_outputs}
    EXPORT ${PROJECT_NAME}-targets
    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
    PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
    COMPONENT SDK)
  if(MSVC_IDE)
    install(FILES ${PDB_OUTPUT_DIRECTORY}/\${CMAKE_INSTALL_CONFIG_NAME}/${PDB_NAME}.pdb DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT SDK OPTIONAL)
  else()
    install(FILES ${PDB_OUTPUT_DIRECTORY}/${PDB_NAME}.pdb DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT SDK OPTIONAL)
  endif()
  if(BUILD_SHARED)
    install(TARGETS libzmq
      RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
      PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
      COMPONENT Runtime)
  endif()
elseif(BUILD_SHARED OR BUILD_STATIC)
  install(TARGETS ${target_outputs}
    EXPORT ${PROJECT_NAME}-targets
    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
    FRAMEWORK DESTINATION "Library/Frameworks"
    PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
endif()

# install(FILES ${public_headers}
#   DESTINATION include
#   COMPONENT SDK)

#if(NOT ZMQ_BUILD_FRAMEWORK)
#  file(GLOB private_headers "${CMAKE_CURRENT_SOURCE_DIR}/src/*.hpp")
#  install(FILES ${sources} ${private_headers} DESTINATION src/zmq
#    COMPONENT SourceCode)
#endif()

foreach(readme ${readme-docs})
  configure_file(${CMAKE_CURRENT_SOURCE_DIR}/${readme} ${CMAKE_CURRENT_BINARY_DIR}/${readme}.txt)

  if(NOT ZMQ_BUILD_FRAMEWORK)
    install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${readme}.txt DESTINATION share/zmq)
  endif()
endforeach()

if(WITH_DOC)
  if(NOT ZMQ_BUILD_FRAMEWORK)
    install(FILES ${html-docs} DESTINATION doc/zmq COMPONENT RefGuide)
  endif()
endif()

if(WIN32)
  set(ZEROMQ_CMAKECONFIG_INSTALL_DIR "CMake" CACHE STRING "install path for ZeroMQConfig.cmake")
else()
  # GNUInstallDirs "DATADIR" wrong here; CMake search path wants "share".
  set(ZEROMQ_CMAKECONFIG_INSTALL_DIR "share/cmake/${PROJECT_NAME}" CACHE STRING "install path for ZeroMQConfig.cmake")
endif()

if((NOT CMAKE_VERSION VERSION_LESS 3.0) AND (BUILD_SHARED OR BUILD_STATIC))
  export(EXPORT ${PROJECT_NAME}-targets
    FILE "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Targets.cmake")
endif()
configure_package_config_file(builds/cmake/${PROJECT_NAME}Config.cmake.in
  "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
  INSTALL_DESTINATION ${ZEROMQ_CMAKECONFIG_INSTALL_DIR})
write_basic_package_version_file(${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake
  VERSION ${ZMQ_VERSION_MAJOR}.${ZMQ_VERSION_MINOR}.${ZMQ_VERSION_PATCH}
  COMPATIBILITY AnyNewerVersion)
if(BUILD_SHARED OR BUILD_STATIC)
  install(EXPORT ${PROJECT_NAME}-targets
    FILE ${PROJECT_NAME}Targets.cmake
    DESTINATION ${ZEROMQ_CMAKECONFIG_INSTALL_DIR})
  install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake
    ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake
    DESTINATION ${ZEROMQ_CMAKECONFIG_INSTALL_DIR})
endif()

option(ENABLE_CPACK "Enables cpack rules" ON)
if(MSVC AND ENABLE_CPACK)
  if(${CMAKE_BUILD_TYPE} MATCHES "Debug")
    set(CMAKE_INSTALL_DEBUG_LIBRARIES_ONLY TRUE)
    set(CMAKE_INSTALL_DEBUG_LIBRARIES TRUE)
    set(CMAKE_INSTALL_UCRT_LIBRARIES TRUE)
  endif()
  include(InstallRequiredSystemLibraries)

  if(CMAKE_CL_64)
    set(arch_name "x64")
  else()
    set(arch_name "x86")
  endif()

  set(CPACK_NSIS_DISPLAY_NAME "ZeroMQ ${ZMQ_VERSION_MAJOR}.${ZMQ_VERSION_MINOR}.${ZMQ_VERSION_PATCH}(${arch_name})")
  set(CPACK_PACKAGE_FILE_NAME "ZeroMQ-${ZMQ_VERSION_MAJOR}.${ZMQ_VERSION_MINOR}.${ZMQ_VERSION_PATCH}-${arch_name}")

  # TODO: I think this part was intended to be used when running cpack
  # separately from cmake but I don't know how that works.
  #
  # macro(add_crt_version version)
  #   set(rel_dir "${CMAKE_CURRENT_BINARY_DIR}/build/${arch_name}/${version};ZeroMQ;ALL;/")
  #   set(debug_dir "${CMAKE_CURRENT_BINARY_DIR}/debug/${arch_name}/${version};ZeroMQ;ALL;/")
  #   if(EXISTS ${rel_dir})
  #     list(APPEND CPACK_INSTALL_CMAKE_PROJECTS ${rel_dir})
  #   endif()

  #   if(EXISTS ${debug_dir})
  #     list(APPEND CPACK_INSTALL_CMAKE_PROJECTS ${rel_dir})
  #   endmacro()
  # endmacro()

  # add_crt_version(v110)
  # add_crt_version(v100)
  # add_crt_version(v90)

  list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_BINARY_DIR})
  set(CPACK_GENERATOR "NSIS")
  set(CPACK_PACKAGE_NAME "ZeroMQ")
  set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "ZeroMQ lightweight messaging kernel")
  set(CPACK_PACKAGE_VENDOR "Miru")
  set(CPACK_NSIS_CONTACT "Steven McCoy <Steven.McCoy@miru.hk>")
  set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_CURRENT_BINARY_DIR}\\\\COPYING.txt")
  # set(CPACK_RESOURCE_FILE_README "${CMAKE_CURRENT_BINARY_DIR}\\\\README.txt")
  # set(CPACK_RESOURCE_FILE_WELCOME "${CMAKE_CURRENT_BINARY_DIR}\\\\WELCOME.txt")
  # There is a bug in NSI that does not handle full unix paths properly. Make
  # sure there is at least one set of four(4) backslashes.
  set(CPACK_NSIS_MUI_ICON "${CMAKE_CURRENT_SOURCE_DIR}\\\\installer.ico")
  set(CPACK_NSIS_MUI_UNIICON "${CMAKE_CURRENT_SOURCE_DIR}\\\\installer.ico")

  set(CPACK_PACKAGE_ICON "${CMAKE_CURRENT_SOURCE_DIR}\\\\branding.bmp")
  set(CPACK_NSIS_COMPRESSOR "/SOLID lzma")
  set(CPACK_PACKAGE_VERSION ${ZMQ_VERSION})
  set(CPACK_PACKAGE_VERSION_MAJOR ${ZMQ_VERSION_MAJOR})
  set(CPACK_PACKAGE_VERSION_MINOR ${ZMQ_VERSION_MINOR})
  set(CPACK_PACKAGE_VERSION_PATCH ${ZMQ_VERSION_PATCH})
  # set(CPACK_PACKAGE_INSTALL_DIRECTORY "ZMQ Install Directory")
  # set(CPACK_TEMPORARY_DIRECTORY "ZMQ Temporary CPack Directory")

  include(CPack)

  cpack_add_component_group(Development
    DISPLAY_NAME "ZeroMQ software development kit"
    EXPANDED)
  cpack_add_component(PerfTools
    DISPLAY_NAME "ZeroMQ performance tools"
    INSTALL_TYPES FullInstall DevInstall)
  cpack_add_component(SourceCode
    DISPLAY_NAME "ZeroMQ source code"
    DISABLED
    INSTALL_TYPES FullInstall)
  cpack_add_component(SDK
    DISPLAY_NAME "ZeroMQ headers and libraries"
    INSTALL_TYPES FullInstall DevInstall
    GROUP Development)
  if(WITH_DOC)
    cpack_add_component(RefGuide
      DISPLAY_NAME "ZeroMQ reference guide"
      INSTALL_TYPES FullInstall DevInstall
      GROUP Development)
  endif()
  cpack_add_component(Runtime
    DISPLAY_NAME "ZeroMQ runtime files"
    REQUIRED
    INSTALL_TYPES FullInstall DevInstall MinInstall)
    cpack_add_install_type(FullInstall
    DISPLAY_NAME "Full install, including source code")
    cpack_add_install_type(DevInstall
    DISPLAY_NAME "Developer install, headers and libraries")
    cpack_add_install_type(MinInstall
    DISPLAY_NAME "Minimal install, runtime only")
endif()

# Export this for library to help build this as a sub-project
set(ZEROMQ_LIBRARY libzmq CACHE STRING "ZeroMQ library")

# Workaround for MSVS10 to avoid the Dialog Hell
# FIXME: This could be removed with future version of CMake.
if(MSVC_VERSION EQUAL 1600)
  set(ZMQ_SLN_FILENAME "${CMAKE_CURRENT_BINARY_DIR}/ZeroMQ.sln")
  if(EXISTS "${ZMQ_SLN_FILENAME}")
    file(APPEND "${ZMQ_SLN_FILENAME}" "\n# This should be regenerated!\n")
  endif()
endif()

# this cannot be moved, as it does not only contain function/macro definitions
include(ClangFormat)