CMakeLists.txt

cmake_minimum_required(VERSION 3.22.1 FATAL_ERROR)

#============================================================================
# Initialize the project
#============================================================================
project(gz-transport14 VERSION 14.0.0)

#============================================================================
# Find gz-cmake
#============================================================================
# If you get an error at this line, you need to install gz-cmake
find_package(gz-cmake4 REQUIRED)
set(GZ_CMAKE_VER ${gz-cmake4_VERSION_MAJOR})

#============================================================================
# Configure the project
#============================================================================
set(skip_pybind11_default_value OFF)
option(SKIP_PYBIND11
      "Skip generating Python bindings via pybind11"
      ${skip_pybind11_default_value})

# Python interfaces vars
include(CMakeDependentOption)
cmake_dependent_option(USE_SYSTEM_PATHS_FOR_PYTHON_INSTALLATION
      "Install python modules in standard system paths in the system"
      OFF "NOT SKIP_PYBIND11" OFF)

cmake_dependent_option(USE_DIST_PACKAGES_FOR_PYTHON
      "Use dist-packages instead of site-package to install python modules"
      OFF "NOT SKIP_PYBIND11" OFF)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

gz_configure_project(VERSION_SUFFIX pre1)

#============================================================================
# Set project-specific options
#============================================================================

# gz-transport currently has no options that are unique to it

if (UNIX AND NOT APPLE)
  set (EXTRA_TEST_LIB_DEPS stdc++fs)
else()
  set (EXTRA_TEST_LIB_DEPS)
endif()

#============================================================================
# Search for project-specific dependencies
#============================================================================
message(STATUS "\n\n-- ====== Finding Dependencies ======")

#--------------------------------------
# Python interfaces
if (SKIP_PYBIND11)
  message(STATUS "SKIP_PYBIND11 set - disabling python bindings")
  find_package(Python3 COMPONENTS Interpreter)
else()
  find_package(Python3 COMPONENTS Interpreter Development)
  if (NOT Python3_Development_FOUND)
    GZ_BUILD_WARNING("Python development libraries are missing: Python interfaces are disabled.")
  else()
    set(PYBIND11_PYTHON_VERSION 3)
    find_package(pybind11 2.4 CONFIG QUIET)

    if (pybind11_FOUND)
      message (STATUS "Searching for pybind11 - found version ${pybind11_VERSION}.")
    else()
      GZ_BUILD_WARNING("pybind11 is missing: Python interfaces are disabled.")
      message (STATUS "Searching for pybind11 - not found.")
    endif()
  endif()
endif()

#--------------------------------------
# Find Protobuf
gz_find_package(GzProtobuf
                REQUIRED
                PRETTY Protobuf)

#--------------------------------------
# Find ZeroMQ
gz_find_package(ZeroMQ VERSION 4 REQUIRED PRIVATE)

if (UNIX AND NOT APPLE)
  execute_process(COMMAND lsb_release -cs
    OUTPUT_VARIABLE RELEASE_CODENAME
    RESULT_VARIABLE LSB_RESULT
    OUTPUT_STRIP_TRAILING_WHITESPACE
  )

  if( NOT (${LSB_RESULT} STREQUAL "0"))
    message(WARNING "lsb_release executable not found. Disabling focal-specific workarounds")
  elseif (${RELEASE_CODENAME} STREQUAL "focal")
    set(UBUNTU_FOCAL 1)
  elseif (${RELEASE_CODENAME} STREQUAL "bullseye")
    set(DEBIAN_BULLSEYE 1)
  endif()
endif()

#--------------------------------------
# Find cppzmq
gz_find_package(CPPZMQ REQUIRED PRIVATE
  PKGCONFIG_IGNORE # NOTE: cppzmq does not seem to offer a pkg-config file
  PRETTY CppZMQ)

#--------------------------------------
# Find uuid
if (MSVC)
  set(skip_pybind11_default_value ON)
  message (STATUS "UUID: Using Windows RPC UuidCreate function\n")
else()
  gz_find_package(UUID REQUIRED)
endif()

#--------------------------------------
# Find gz-utils
gz_find_package(gz-utils3 REQUIRED COMPONENTS cli)
set(GZ_UTILS_VER ${gz-utils3_VERSION_MAJOR})

#--------------------------------------
# Find gz-msgs
gz_find_package(gz-msgs11 REQUIRED)
set(GZ_MSGS_VER ${gz-msgs11_VERSION_MAJOR})

#--------------------------------------
# Find ifaddrs
gz_find_package(IFADDRS QUIET)
if (IFADDRS_FOUND)
  set (HAVE_IFADDRS ON CACHE BOOL "HAVE IFADDRS" FORCE)
else ()
  set (HAVE_IFADDRS OFF CACHE BOOL "HAVE IFADDRS" FORCE)
endif()

#--------------------------------------
# Find if command is available. This is used to enable tests.
# Note that CLI files are installed regardless of whether the dependency is
# available during build time
find_program(HAVE_GZ_TOOLS gz)
set (GZ_TOOLS_VER 2)

#--------------------------------------
# Find SQLite3
gz_find_package(SQLite3
  VERSION 3.7.13
  REQUIRED_BY log
  PRIVATE_FOR log
  PRETTY sqlite3)


#============================================================================
# Configure the build
#============================================================================
gz_configure_build(QUIT_IF_BUILD_ERRORS
  COMPONENTS log parameters)

#============================================================================
# gz command line support
#============================================================================
add_subdirectory(conf)

#============================================================================
# gz transport python bindings
#============================================================================
if (pybind11_FOUND AND NOT SKIP_PYBIND11)
  add_subdirectory(python)
endif()

#============================================================================
# Create package information
#============================================================================
gz_create_packages()

#============================================================================
# Configure documentation
#============================================================================
configure_file(${CMAKE_SOURCE_DIR}/api.md.in ${CMAKE_BINARY_DIR}/api.md)
configure_file(${CMAKE_SOURCE_DIR}/tutorials.md.in ${CMAKE_BINARY_DIR}/tutorials.md)

gz_create_docs(
  API_MAINPAGE_MD "${CMAKE_BINARY_DIR}/api.md"
  TUTORIALS_MAINPAGE_MD "${CMAKE_BINARY_DIR}/tutorials.md")