Squashed 'libs/cppzmq/' content from commit c66fc609

git-subtree-dir: libs/cppzmq
git-subtree-split: c66fc6094b2a03439dea8469719e221e80e2e8e7

CMakeLists.txt

@@ -0,0 +1,112 @@
+cmake_minimum_required(VERSION 3.11)
+
+list (APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
+
+include (DetectCPPZMQVersion)
+
+project(cppzmq VERSION ${DETECTED_CPPZMQ_VERSION})
+
+if (NOT TARGET libzmq AND NOT TARGET libzmq-static)
+  find_package(ZeroMQ QUIET)
+
+  # libzmq autotools install: fallback to pkg-config
+  if(NOT ZeroMQ_FOUND)
+    message(STATUS "CMake libzmq package not found, trying again with pkg-config (normal install of zeromq)")
+    list (APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_LIST_DIR}/libzmq-pkg-config)
+    find_package(ZeroMQ REQUIRED)
+  endif()
+
+  # TODO "REQUIRED" above should already cause a fatal failure if not found, but this doesn't seem to work
+  if(NOT ZeroMQ_FOUND)
+    message(FATAL_ERROR "ZeroMQ was not found, neither as a CMake package nor via pkg-config")
+  endif()
+
+  if (ZeroMQ_FOUND AND NOT (TARGET libzmq OR TARGET libzmq-static))
+    message(FATAL_ERROR "ZeroMQ version not supported!")
+  endif()
+endif()
+
+if (EXISTS "${CMAKE_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)
+    ADD_DEFINITIONS (-DZMQ_BUILD_DRAFT_API)
+    set (pkg_config_defines "-DZMQ_BUILD_DRAFT_API=1")
+else (ENABLE_DRAFTS)
+    set (pkg_config_defines "")
+endif (ENABLE_DRAFTS)
+
+message(STATUS "cppzmq v${cppzmq_VERSION}")
+
+set(CPPZMQ_HEADERS
+    zmq.hpp
+    zmq_addon.hpp
+)
+
+foreach (target cppzmq cppzmq-static)
+  add_library(${target} INTERFACE)
+  target_include_directories(${target} INTERFACE $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+                                                 $<INSTALL_INTERFACE:include>)
+endforeach()
+
+target_link_libraries(cppzmq INTERFACE libzmq)
+target_link_libraries(cppzmq-static INTERFACE libzmq-static)
+
+include(GNUInstallDirs)
+include(CMakePackageConfigHelpers)
+
+install(TARGETS cppzmq cppzmq-static
+        EXPORT ${PROJECT_NAME}-targets)
+
+install(FILES ${CPPZMQ_HEADERS}
+        DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+
+# GNUInstallDirs "DATADIR" wrong here; CMake search path wants "share".
+set(CPPZMQ_CMAKECONFIG_INSTALL_DIR "share/cmake/${PROJECT_NAME}" CACHE STRING "install path for cppzmqConfig.cmake")
+
+configure_file(libzmq-pkg-config/FindZeroMQ.cmake
+               libzmq-pkg-config/FindZeroMQ.cmake
+               COPYONLY)
+
+export(EXPORT ${PROJECT_NAME}-targets
+     FILE "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Targets.cmake")
+configure_package_config_file(${PROJECT_NAME}Config.cmake.in
+                              "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
+                              INSTALL_DESTINATION ${CPPZMQ_CMAKECONFIG_INSTALL_DIR})
+# Workaround until ARCH_INDEPENDENT flag can be used with cmake 3.14.
+# The ConigVersion.cmake file contains checks for the architecture is was
+# generated on, which can cause problems for header only libraries
+# used with e.g. the Conan package manager. Since it is header only we
+# can/should omit those checks.
+set(CPPZMQ_SIZEOF_VOID_P ${CMAKE_SIZEOF_VOID_P})
+set(CMAKE_SIZEOF_VOID_P "") # a simple unset is not sufficient
+write_basic_package_version_file(${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake
+                                 VERSION ${CPPZMQ_VERSION}
+                                 COMPATIBILITY AnyNewerVersion)
+set(CMAKE_SIZEOF_VOID_P ${CPPZMQ_SIZEOF_VOID_P})
+
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/cppzmq.pc.in
+               ${CMAKE_CURRENT_BINARY_DIR}/cppzmq.pc @ONLY)
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/cppzmq.pc
+              DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
+
+install(EXPORT ${PROJECT_NAME}-targets
+        FILE ${PROJECT_NAME}Targets.cmake
+        DESTINATION ${CPPZMQ_CMAKECONFIG_INSTALL_DIR})
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake
+              ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake
+              DESTINATION ${CPPZMQ_CMAKECONFIG_INSTALL_DIR})
+install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/libzmq-pkg-config/FindZeroMQ.cmake
+              DESTINATION ${CPPZMQ_CMAKECONFIG_INSTALL_DIR}/libzmq-pkg-config)
+
+option(CPPZMQ_BUILD_TESTS "Whether or not to build the tests" ON)
+
+if (CPPZMQ_BUILD_TESTS)
+    enable_testing()
+    add_subdirectory(tests)
+    if (CMAKE_CXX_STANDARD AND NOT CMAKE_CXX_STANDARD EQUAL 98 AND CMAKE_CXX_STANDARD GREATER_EQUAL 11)
+        add_subdirectory(examples)
+    endif()
+endif()