# CMakeLists.txt -- Build system for the pybind11 modules # # Copyright (c) 2015 Wenzel Jakob # # All rights reserved. Use of this source code is governed by a # BSD-style license that can be found in the LICENSE file. cmake_minimum_required(VERSION 3.4) # The `cmake_minimum_required(VERSION 3.4...3.22)` syntax does not work with # some versions of VS that have a patched CMake 3.11. This forces us to emulate # the behavior using the following workaround: if(${CMAKE_VERSION} VERSION_LESS 3.22) cmake_policy(VERSION ${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}) else() cmake_policy(VERSION 3.22) endif() # Avoid infinite recursion if tests include this as a subdirectory if(DEFINED PYBIND11_MASTER_PROJECT) return() endif() # Extract project version from source file(STRINGS "${CMAKE_CURRENT_SOURCE_DIR}/include/pybind11/detail/common.h" pybind11_version_defines REGEX "#define PYBIND11_VERSION_(MAJOR|MINOR|PATCH) ") foreach(ver ${pybind11_version_defines}) if(ver MATCHES [[#define PYBIND11_VERSION_(MAJOR|MINOR|PATCH) +([^ ]+)$]]) set(PYBIND11_VERSION_${CMAKE_MATCH_1} "${CMAKE_MATCH_2}") endif() endforeach() if(PYBIND11_VERSION_PATCH MATCHES [[\.([a-zA-Z0-9]+)$]]) set(pybind11_VERSION_TYPE "${CMAKE_MATCH_1}") endif() string(REGEX MATCH "^[0-9]+" PYBIND11_VERSION_PATCH "${PYBIND11_VERSION_PATCH}") project( pybind11 LANGUAGES CXX VERSION "${PYBIND11_VERSION_MAJOR}.${PYBIND11_VERSION_MINOR}.${PYBIND11_VERSION_PATCH}") # Standard includes include(GNUInstallDirs) include(CMakePackageConfigHelpers) include(CMakeDependentOption) if(NOT pybind11_FIND_QUIETLY) message(STATUS "pybind11 v${pybind11_VERSION} ${pybind11_VERSION_TYPE}") endif() # Check if pybind11 is being used directly or via add_subdirectory if(CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR) ### Warn if not an out-of-source builds if(CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_CURRENT_BINARY_DIR) set(lines "You are building in-place. If that is not what you intended to " "do, you can clean the source directory with:\n" "rm -r CMakeCache.txt CMakeFiles/ cmake_uninstall.cmake pybind11Config.cmake " "pybind11ConfigVersion.cmake tests/CMakeFiles/\n") message(AUTHOR_WARNING ${lines}) endif() set(PYBIND11_MASTER_PROJECT ON) if(OSX AND CMAKE_VERSION VERSION_LESS 3.7) # Bug in macOS CMake < 3.7 is unable to download catch message(WARNING "CMAKE 3.7+ needed on macOS to download catch, and newer HIGHLY recommended") elseif(WINDOWS AND CMAKE_VERSION VERSION_LESS 3.8) # Only tested with 3.8+ in CI. message(WARNING "CMAKE 3.8+ tested on Windows, previous versions untested") endif() message(STATUS "CMake ${CMAKE_VERSION}") if(CMAKE_CXX_STANDARD) set(CMAKE_CXX_EXTENSIONS OFF) set(CMAKE_CXX_STANDARD_REQUIRED ON) endif() set(pybind11_system "") set_property(GLOBAL PROPERTY USE_FOLDERS ON) else() set(PYBIND11_MASTER_PROJECT OFF) set(pybind11_system SYSTEM) endif() # Options option(PYBIND11_INSTALL "Install pybind11 header files?" ${PYBIND11_MASTER_PROJECT}) option(PYBIND11_TEST "Build pybind11 test suite?" ${PYBIND11_MASTER_PROJECT}) option(PYBIND11_NOPYTHON "Disable search for Python" OFF) set(PYBIND11_INTERNALS_VERSION "" CACHE STRING "Override the ABI version, may be used to enable the unstable ABI.") cmake_dependent_option( USE_PYTHON_INCLUDE_DIR "Install pybind11 headers in Python include directory instead of default installation prefix" OFF "PYBIND11_INSTALL" OFF) cmake_dependent_option(PYBIND11_FINDPYTHON "Force new FindPython" OFF "NOT CMAKE_VERSION VERSION_LESS 3.12" OFF) # NB: when adding a header don't forget to also add it to setup.py set(PYBIND11_HEADERS include/pybind11/detail/class.h include/pybind11/detail/common.h include/pybind11/detail/descr.h include/pybind11/detail/init.h include/pybind11/detail/internals.h include/pybind11/detail/type_caster_base.h include/pybind11/detail/typeid.h include/pybind11/attr.h include/pybind11/buffer_info.h include/pybind11/cast.h include/pybind11/chrono.h include/pybind11/common.h include/pybind11/complex.h include/pybind11/options.h include/pybind11/eigen.h include/pybind11/embed.h include/pybind11/eval.h include/pybind11/gil.h include/pybind11/iostream.h include/pybind11/functional.h include/pybind11/numpy.h include/pybind11/operators.h include/pybind11/pybind11.h include/pybind11/pytypes.h include/pybind11/stl.h include/pybind11/stl_bind.h include/pybind11/stl/filesystem.h) # Compare with grep and warn if mismatched if(PYBIND11_MASTER_PROJECT AND NOT CMAKE_VERSION VERSION_LESS 3.12) file( GLOB_RECURSE _pybind11_header_check LIST_DIRECTORIES false RELATIVE "${CMAKE_CURRENT_SOURCE_DIR}" CONFIGURE_DEPENDS "include/pybind11/*.h") set(_pybind11_here_only ${PYBIND11_HEADERS}) set(_pybind11_disk_only ${_pybind11_header_check}) list(REMOVE_ITEM _pybind11_here_only ${_pybind11_header_check}) list(REMOVE_ITEM _pybind11_disk_only ${PYBIND11_HEADERS}) if(_pybind11_here_only) message(AUTHOR_WARNING "PYBIND11_HEADERS has extra files:" ${_pybind11_here_only}) endif() if(_pybind11_disk_only) message(AUTHOR_WARNING "PYBIND11_HEADERS is missing files:" ${_pybind11_disk_only}) endif() endif() # CMake 3.12 added list(TRANSFORM PREPEND # But we can't use it yet string(REPLACE "include/" "${CMAKE_CURRENT_SOURCE_DIR}/include/" PYBIND11_HEADERS "${PYBIND11_HEADERS}") # Cache variable so this can be used in parent projects set(pybind11_INCLUDE_DIR "${CMAKE_CURRENT_LIST_DIR}/include" CACHE INTERNAL "Directory where pybind11 headers are located") # Backward compatible variable for add_subdirectory mode if(NOT PYBIND11_MASTER_PROJECT) set(PYBIND11_INCLUDE_DIR "${pybind11_INCLUDE_DIR}" CACHE INTERNAL "") endif() # Note: when creating targets, you cannot use if statements at configure time - # you need generator expressions, because those will be placed in the target file. # You can also place ifs *in* the Config.in, but not here. # This section builds targets, but does *not* touch Python # Non-IMPORT targets cannot be defined twice if(NOT TARGET pybind11_headers) # Build the headers-only target (no Python included): # (long name used here to keep this from clashing in subdirectory mode) add_library(pybind11_headers INTERFACE) add_library(pybind11::pybind11_headers ALIAS pybind11_headers) # to match exported target add_library(pybind11::headers ALIAS pybind11_headers) # easier to use/remember target_include_directories( pybind11_headers ${pybind11_system} INTERFACE $ $) target_compile_features(pybind11_headers INTERFACE cxx_inheriting_constructors cxx_user_literals cxx_right_angle_brackets) if(NOT "${PYBIND11_INTERNALS_VERSION}" STREQUAL "") target_compile_definitions( pybind11_headers INTERFACE "PYBIND11_INTERNALS_VERSION=${PYBIND11_INTERNALS_VERSION}") endif() else() # It is invalid to install a target twice, too. set(PYBIND11_INSTALL OFF) endif() include("${CMAKE_CURRENT_SOURCE_DIR}/tools/pybind11Common.cmake") # https://github.com/jtojnar/cmake-snips/#concatenating-paths-when-building-pkg-config-files # TODO: cmake 3.20 adds the cmake_path() function, which obsoletes this snippet include("${CMAKE_CURRENT_SOURCE_DIR}/tools/JoinPaths.cmake") # Relative directory setting if(USE_PYTHON_INCLUDE_DIR AND DEFINED Python_INCLUDE_DIRS) file(RELATIVE_PATH CMAKE_INSTALL_INCLUDEDIR ${CMAKE_INSTALL_PREFIX} ${Python_INCLUDE_DIRS}) elseif(USE_PYTHON_INCLUDE_DIR AND DEFINED PYTHON_INCLUDE_DIR) file(RELATIVE_PATH CMAKE_INSTALL_INCLUDEDIR ${CMAKE_INSTALL_PREFIX} ${PYTHON_INCLUDE_DIRS}) endif() if(PYBIND11_INSTALL) install(DIRECTORY ${pybind11_INCLUDE_DIR}/pybind11 DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}) set(PYBIND11_CMAKECONFIG_INSTALL_DIR "${CMAKE_INSTALL_DATAROOTDIR}/cmake/${PROJECT_NAME}" CACHE STRING "install path for pybind11Config.cmake") if(IS_ABSOLUTE "${CMAKE_INSTALL_INCLUDEDIR}") set(pybind11_INCLUDEDIR "${CMAKE_INSTALL_FULL_INCLUDEDIR}") else() set(pybind11_INCLUDEDIR "\$\{PACKAGE_PREFIX_DIR\}/${CMAKE_INSTALL_INCLUDEDIR}") endif() configure_package_config_file( tools/${PROJECT_NAME}Config.cmake.in "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake" INSTALL_DESTINATION ${PYBIND11_CMAKECONFIG_INSTALL_DIR}) if(CMAKE_VERSION VERSION_LESS 3.14) # Remove CMAKE_SIZEOF_VOID_P from ConfigVersion.cmake since the library does # not depend on architecture specific settings or libraries. set(_PYBIND11_CMAKE_SIZEOF_VOID_P ${CMAKE_SIZEOF_VOID_P}) unset(CMAKE_SIZEOF_VOID_P) write_basic_package_version_file( ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake VERSION ${PROJECT_VERSION} COMPATIBILITY AnyNewerVersion) set(CMAKE_SIZEOF_VOID_P ${_PYBIND11_CMAKE_SIZEOF_VOID_P}) else() # CMake 3.14+ natively supports header-only libraries write_basic_package_version_file( ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake VERSION ${PROJECT_VERSION} COMPATIBILITY AnyNewerVersion ARCH_INDEPENDENT) endif() install( FILES ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake tools/FindPythonLibsNew.cmake tools/pybind11Common.cmake tools/pybind11Tools.cmake tools/pybind11NewTools.cmake DESTINATION ${PYBIND11_CMAKECONFIG_INSTALL_DIR}) if(NOT PYBIND11_EXPORT_NAME) set(PYBIND11_EXPORT_NAME "${PROJECT_NAME}Targets") endif() install(TARGETS pybind11_headers EXPORT "${PYBIND11_EXPORT_NAME}") install( EXPORT "${PYBIND11_EXPORT_NAME}" NAMESPACE "pybind11::" DESTINATION ${PYBIND11_CMAKECONFIG_INSTALL_DIR}) # pkg-config support if(NOT prefix_for_pc_file) set(prefix_for_pc_file "${CMAKE_INSTALL_PREFIX}") endif() join_paths(includedir_for_pc_file "\${prefix}" "${CMAKE_INSTALL_INCLUDEDIR}") configure_file("${CMAKE_CURRENT_SOURCE_DIR}/tools/pybind11.pc.in" "${CMAKE_CURRENT_BINARY_DIR}/pybind11.pc" @ONLY) install(FILES "${CMAKE_CURRENT_BINARY_DIR}/pybind11.pc" DESTINATION "${CMAKE_INSTALL_DATAROOTDIR}/pkgconfig/") # Uninstall target if(PYBIND11_MASTER_PROJECT) configure_file("${CMAKE_CURRENT_SOURCE_DIR}/tools/cmake_uninstall.cmake.in" "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake" IMMEDIATE @ONLY) add_custom_target(uninstall COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake) endif() endif() # BUILD_TESTING takes priority, but only if this is the master project if(PYBIND11_MASTER_PROJECT AND DEFINED BUILD_TESTING) if(BUILD_TESTING) if(_pybind11_nopython) message(FATAL_ERROR "Cannot activate tests in NOPYTHON mode") else() add_subdirectory(tests) endif() endif() else() if(PYBIND11_TEST) if(_pybind11_nopython) message(FATAL_ERROR "Cannot activate tests in NOPYTHON mode") else() add_subdirectory(tests) endif() endif() endif() # Better symmetry with find_package(pybind11 CONFIG) mode. if(NOT PYBIND11_MASTER_PROJECT) set(pybind11_FOUND TRUE CACHE INTERNAL "True if pybind11 and all required components found on the system") endif()