148 lines
6.1 KiB
CMake
148 lines
6.1 KiB
CMake
# To build python bindings we need a python executable and boost python module. Unfortunately,
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# their names might not be interlinked and we can not implement a general solution.
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# The code below assumes default boost installation, when the module for python 2 is named
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# 'python' and the module for python 3 is named 'python3'.
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# To customize that one can provide a name for the Boost::python module via
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# 'boost-python-module-name' variable when invoking cmake.
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# E.g. on Gentoo with python 3.6 and Boost::python library name 'libboost_python-3.6.so'
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# the parameter would be -Dboost-python-module-name="python-3.6".
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# The extension module and the cpython executable have to use the same C runtime library. On Windows
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# Python is compiled with MSVC and we will test MSVC version to make sure that it is the same for
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# the given Python version and our extension module. See https://wiki.python.org/moin/WindowsCompilers
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# for details. We provide a flag to skip this test for whatever reason (pass -Dskip-python-runtime-test=True)
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# Sets _ret to a list of python versions (major.minor) that use the same MSVC runtime as this build does
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# assumes MSVC was detected already
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# See https://en.wikipedia.org/wiki/Microsoft_Visual_C++#Internal_version_numbering
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function(_get_compatible_python_versions _ret)
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if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 15 AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 16)
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list(APPEND _tmp 2.6 2.7 3.0 3.1 3.2)
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elseif(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 16 AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 17)
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list(APPEND _tmp 3.3 3.4)
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elseif(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 19 AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 20)
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list(APPEND _tmp 3.5 3.6)
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endif()
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set(${_ret} ${_tmp} PARENT_SCOPE)
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endfunction()
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if (CMAKE_CXX_COMPILER_ID MATCHES "MSVC" AND NOT skip-python-runtime-test)
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_get_compatible_python_versions(Python_ADDITIONAL_VERSIONS)
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endif()
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find_package(PythonInterp REQUIRED)
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if (CMAKE_CXX_COMPILER_ID MATCHES "MSVC" AND NOT skip-python-runtime-test)
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message(STATUS "Testing found python version. Requested: ${Python_ADDITIONAL_VERSIONS}, found: ${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}")
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if (NOT "${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}" IN_LIST Python_ADDITIONAL_VERSIONS)
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message(FATAL_ERROR "Incompatible Python and C runtime: MSVC ${CMAKE_CXX_COMPILER_VERSION} and Python ${PYTHON_VERSION_STRING}")
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endif()
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endif()
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set(Python_ADDITIONAL_VERSIONS "${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}")
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find_package(PythonLibs REQUIRED)
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if (NOT boost-python-module-name)
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# use active python
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if (PYTHON_VERSION_STRING VERSION_GREATER_EQUAL "3")
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set(_boost-python-module-name "python${PYTHON_VERSION_MAJOR}")
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else()
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set(_boost-python-module-name "python") # to overwrite possible value from a previous run
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endif()
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endif()
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set(boost-python-module-name ${_boost-python-module-name} CACHE STRING "Boost:python module name, e.g. 'pythom-3.6'")
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find_package(Boost REQUIRED COMPONENTS ${boost-python-module-name})
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python_add_module(python-libtorrent
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src/module.cpp
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src/sha1_hash.cpp
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src/converters.cpp
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src/create_torrent.cpp
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src/fingerprint.cpp
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src/utility.cpp
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src/session.cpp
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src/entry.cpp
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src/torrent_info.cpp
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src/string.cpp
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src/torrent_handle.cpp
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src/torrent_status.cpp
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src/session_settings.cpp
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src/version.cpp
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src/alert.cpp
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src/datetime.cpp
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src/peer_info.cpp
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src/ip_filter.cpp
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src/magnet_uri.cpp
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src/error_code.cpp
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)
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set_target_properties(python-libtorrent
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PROPERTIES
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OUTPUT_NAME libtorrent
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)
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target_include_directories(python-libtorrent
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PRIVATE
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${PYTHON_INCLUDE_DIRS}
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)
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string(TOUPPER "${boost-python-module-name}" boost_python_module_name_uppercase)
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target_link_libraries(python-libtorrent
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PRIVATE
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torrent-rasterbar
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${Boost_${boost_python_module_name_uppercase}_LIBRARY}
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# Boost::python adds that but without a path to the library. Therefore we have to either
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# provide the path (but, unfortunately, FindPythonLibs.cmake does not return the library dir),
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# or give the full file name here (this FindPythonLibs.cmake provides to us).
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${PYTHON_LIBRARIES}
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)
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# Bindings module uses deprecated libtorrent features, thus we disable these warnings
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if (CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
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check_cxx_compiler_flag("-Wno-deprecated-declarations" _WNO_DEPRECATED_DECLARATIONS)
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if (_WNO_DEPRECATED_DECLARATIONS)
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target_compile_options(python-libtorrent PRIVATE -Wno-deprecated-declarations)
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endif()
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endif()
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execute_process(COMMAND
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${PYTHON_EXECUTABLE} -c "import distutils.sysconfig;
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print(';'.join(map(str, [
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distutils.sysconfig.get_python_lib(plat_specific=True, prefix=''),
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distutils.sysconfig.get_config_var('EXT_SUFFIX')
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])))"
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OUTPUT_VARIABLE _python_sysconfig_vars OUTPUT_STRIP_TRAILING_WHITESPACE)
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list(GET _python_sysconfig_vars 0 PYTHON_SITE_PACKAGES)
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list(GET _python_sysconfig_vars 1 PYTHON_EXT_SUFFIX)
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message(STATUS "Python site packages: ${PYTHON_SITE_PACKAGES}")
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# python 2 does not provide the 'EXT_SUFFIX' sysconfig variable, so we use cmake default then
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if (NOT "${PYTHON_EXT_SUFFIX}" STREQUAL "None")
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message(STATUS "Python extension suffix: ${PYTHON_EXT_SUFFIX}")
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# we mimic the name, created by setuptools
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# example: libtorrent.cpython-36m-x86_64-linux-gnu.so
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set_target_properties(python-libtorrent PROPERTIES SUFFIX ${PYTHON_EXT_SUFFIX})
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endif()
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set(SETUP_PY_IN "${CMAKE_CURRENT_SOURCE_DIR}/setup.py.cmake.in")
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set(SETUP_PY "${CMAKE_CURRENT_BINARY_DIR}/setup.py")
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set(OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/timestamp")
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set(DEPS python-libtorrent "${SETUP_PY}")
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configure_file(${SETUP_PY_IN} ${SETUP_PY} @ONLY)
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add_custom_command(OUTPUT ${OUTPUT}
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COMMAND ${PYTHON_EXECUTABLE} ${SETUP_PY} build -b "${CMAKE_CURRENT_SOURCE_DIR}"
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COMMAND ${PYTHON_EXECUTABLE} ${SETUP_PY} egg_info -b "${CMAKE_CURRENT_SOURCE_DIR}"
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COMMAND ${CMAKE_COMMAND} -E touch ${OUTPUT}
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DEPENDS ${DEPS})
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add_custom_target(python_bindings ALL DEPENDS ${OUTPUT})
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install(TARGETS python-libtorrent DESTINATION "${PYTHON_SITE_PACKAGES}")
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install(DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/libtorrent.egg-info" DESTINATION "${PYTHON_SITE_PACKAGES}")
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