mirror of
https://github.com/opencv/opencv.git
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300 lines
14 KiB
CMake
300 lines
14 KiB
CMake
# Find specified Python version
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# Arguments:
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# preferred_version (value): Version to check for first
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# min_version (value): Minimum supported version
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# library_env (value): Name of Python library ENV variable to check
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# include_dir_env (value): Name of Python include directory ENV variable to check
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# found (variable): Set if interpreter found
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# executable (variable): Output of executable found
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# version_string (variable): Output of found version
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# version_major (variable): Output of found major version
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# version_minor (variable): Output of found minor version
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# libs_found (variable): Set if libs found
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# libs_version_string (variable): Output of found libs version
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# libraries (variable): Output of found Python libraries
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# library (variable): Output of found Python library
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# debug_libraries (variable): Output of found Python debug libraries
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# debug_library (variable): Output of found Python debug library
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# include_path (variable): Output of found Python include path
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# include_dir (variable): Output of found Python include dir
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# include_dir2 (variable): Output of found Python include dir2
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# packages_path (variable): Output of found Python packages path
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# numpy_include_dirs (variable): Output of found Python Numpy include dirs
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# numpy_version (variable): Output of found Python Numpy version
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function(find_python preferred_version min_version library_env include_dir_env
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found executable version_string version_major version_minor
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libs_found libs_version_string libraries library debug_libraries
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debug_library include_path include_dir include_dir2 packages_path
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numpy_include_dirs numpy_version)
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if(NOT ${found})
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if(" ${executable}" STREQUAL " PYTHON_EXECUTABLE")
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set(__update_python_vars 0)
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else()
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set(__update_python_vars 1)
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endif()
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ocv_check_environment_variables(${executable})
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if(${executable})
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set(PYTHON_EXECUTABLE "${${executable}}")
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endif()
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if(WIN32 AND NOT ${executable} AND OPENCV_PYTHON_PREFER_WIN32_REGISTRY) # deprecated
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# search for executable with the same bitness as resulting binaries
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# standard FindPythonInterp always prefers executable from system path
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# this is really important because we are using the interpreter for numpy search and for choosing the install location
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foreach(_CURRENT_VERSION ${Python_ADDITIONAL_VERSIONS} "${preferred_version}" "${min_version}")
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find_host_program(PYTHON_EXECUTABLE
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NAMES python${_CURRENT_VERSION} python
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PATHS
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[HKEY_LOCAL_MACHINE\\\\SOFTWARE\\\\Python\\\\PythonCore\\\\${_CURRENT_VERSION}\\\\InstallPath]
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[HKEY_CURRENT_USER\\\\SOFTWARE\\\\Python\\\\PythonCore\\\\${_CURRENT_VERSION}\\\\InstallPath]
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NO_SYSTEM_ENVIRONMENT_PATH
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)
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endforeach()
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endif()
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if(preferred_version)
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set(__python_package_version "${preferred_version} EXACT")
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find_host_package(PythonInterp "${preferred_version}" EXACT)
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if(NOT PYTHONINTERP_FOUND)
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message(STATUS "Python is not found: ${preferred_version} EXACT")
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endif()
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elseif(min_version)
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set(__python_package_version "${min_version}")
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find_host_package(PythonInterp "${min_version}")
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else()
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set(__python_package_version "")
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find_host_package(PythonInterp)
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endif()
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string(REGEX MATCH "^[0-9]+" _python_version_major "${min_version}")
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if(PYTHONINTERP_FOUND)
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# Check if python major version is correct
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if(" ${_python_version_major}" STREQUAL " ")
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set(_python_version_major "${PYTHON_VERSION_MAJOR}")
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endif()
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if(NOT "${_python_version_major}" STREQUAL "${PYTHON_VERSION_MAJOR}"
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AND NOT DEFINED ${executable}
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)
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if(NOT OPENCV_SKIP_PYTHON_WARNING)
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message(WARNING "CMake's 'find_host_package(PythonInterp ${__python_package_version})' found wrong Python version:\n"
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"PYTHON_EXECUTABLE=${PYTHON_EXECUTABLE}\n"
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"PYTHON_VERSION_STRING=${PYTHON_VERSION_STRING}\n"
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"Consider providing the '${executable}' variable via CMake command line or environment variables\n")
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endif()
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ocv_clear_vars(PYTHONINTERP_FOUND PYTHON_EXECUTABLE PYTHON_VERSION_STRING PYTHON_VERSION_MAJOR PYTHON_VERSION_MINOR PYTHON_VERSION_PATCH)
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if(NOT CMAKE_VERSION VERSION_LESS "3.12")
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if(_python_version_major STREQUAL "2")
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set(__PYTHON_PREFIX Python2)
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else()
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set(__PYTHON_PREFIX Python3)
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endif()
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find_host_package(${__PYTHON_PREFIX} "${preferred_version}" COMPONENTS Interpreter)
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if(${__PYTHON_PREFIX}_EXECUTABLE)
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set(PYTHON_EXECUTABLE "${${__PYTHON_PREFIX}_EXECUTABLE}")
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find_host_package(PythonInterp "${preferred_version}") # Populate other variables
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endif()
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else()
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message(STATUS "Consider using CMake 3.12+ for better Python support")
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endif()
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endif()
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if(PYTHONINTERP_FOUND AND "${_python_version_major}" STREQUAL "${PYTHON_VERSION_MAJOR}")
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# Copy outputs
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set(_found ${PYTHONINTERP_FOUND})
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set(_executable ${PYTHON_EXECUTABLE})
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set(_version_string ${PYTHON_VERSION_STRING})
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set(_version_major ${PYTHON_VERSION_MAJOR})
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set(_version_minor ${PYTHON_VERSION_MINOR})
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set(_version_patch ${PYTHON_VERSION_PATCH})
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endif()
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endif()
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if(__update_python_vars)
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# Clear find_host_package side effects
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unset(PYTHONINTERP_FOUND)
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unset(PYTHON_EXECUTABLE CACHE)
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unset(PYTHON_VERSION_STRING)
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unset(PYTHON_VERSION_MAJOR)
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unset(PYTHON_VERSION_MINOR)
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unset(PYTHON_VERSION_PATCH)
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endif()
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if(_found)
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set(_version_major_minor "${_version_major}.${_version_minor}")
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if(NOT ANDROID AND NOT APPLE_FRAMEWORK)
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ocv_check_environment_variables(${library_env} ${include_dir_env})
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if(NOT ${${library_env}} STREQUAL "")
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set(PYTHON_LIBRARY "${${library_env}}")
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endif()
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if(NOT ${${include_dir_env}} STREQUAL "")
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set(PYTHON_INCLUDE_DIR "${${include_dir_env}}")
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endif()
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# not using _version_string here, because it might not conform to the CMake version format
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if(CMAKE_CROSSCOMPILING)
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# builder version can differ from target, matching base version (e.g. 2.7)
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find_package(PythonLibs "${_version_major_minor}")
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else()
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find_package(PythonLibs "${_version_major_minor}.${_version_patch}" EXACT)
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endif()
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if(PYTHONLIBS_FOUND)
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# Copy outputs
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set(_libs_found ${PYTHONLIBS_FOUND})
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set(_libraries ${PYTHON_LIBRARIES})
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set(_include_path ${PYTHON_INCLUDE_PATH})
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set(_include_dirs ${PYTHON_INCLUDE_DIRS})
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set(_debug_libraries ${PYTHON_DEBUG_LIBRARIES})
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set(_libs_version_string ${PYTHONLIBS_VERSION_STRING})
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set(_debug_library ${PYTHON_DEBUG_LIBRARY})
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set(_library ${PYTHON_LIBRARY})
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set(_library_debug ${PYTHON_LIBRARY_DEBUG})
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set(_library_release ${PYTHON_LIBRARY_RELEASE})
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set(_include_dir ${PYTHON_INCLUDE_DIR})
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set(_include_dir2 ${PYTHON_INCLUDE_DIR2})
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endif()
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if(__update_python_vars)
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# Clear find_package side effects
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unset(PYTHONLIBS_FOUND)
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unset(PYTHON_LIBRARIES)
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unset(PYTHON_INCLUDE_PATH)
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unset(PYTHON_INCLUDE_DIRS)
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unset(PYTHON_DEBUG_LIBRARIES)
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unset(PYTHONLIBS_VERSION_STRING)
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unset(PYTHON_DEBUG_LIBRARY CACHE)
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unset(PYTHON_LIBRARY)
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unset(PYTHON_LIBRARY_DEBUG)
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unset(PYTHON_LIBRARY_RELEASE)
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unset(PYTHON_LIBRARY CACHE)
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unset(PYTHON_LIBRARY_DEBUG CACHE)
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unset(PYTHON_LIBRARY_RELEASE CACHE)
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unset(PYTHON_INCLUDE_DIR CACHE)
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unset(PYTHON_INCLUDE_DIR2 CACHE)
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endif()
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endif()
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if(NOT ANDROID AND NOT IOS)
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if(CMAKE_HOST_UNIX)
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execute_process(COMMAND ${_executable} -c "from sysconfig import *; print(get_path('purelib'))"
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RESULT_VARIABLE _cvpy_process
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OUTPUT_VARIABLE _std_packages_path
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OUTPUT_STRIP_TRAILING_WHITESPACE)
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if("${_std_packages_path}" MATCHES "site-packages")
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set(_packages_path "python${_version_major_minor}/site-packages")
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else() #debian based assumed, install to the dist-packages.
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set(_packages_path "python${_version_major_minor}/dist-packages")
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endif()
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set(_packages_path "lib/${_packages_path}")
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elseif(CMAKE_HOST_WIN32)
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get_filename_component(_path "${_executable}" PATH)
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file(TO_CMAKE_PATH "${_path}" _path)
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if(NOT EXISTS "${_path}/Lib/site-packages")
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unset(_path)
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get_filename_component(_path "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${_version_major_minor}\\InstallPath]" ABSOLUTE)
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if(NOT _path)
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get_filename_component(_path "[HKEY_CURRENT_USER\\SOFTWARE\\Python\\PythonCore\\${_version_major_minor}\\InstallPath]" ABSOLUTE)
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endif()
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file(TO_CMAKE_PATH "${_path}" _path)
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endif()
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set(_packages_path "${_path}/Lib/site-packages")
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unset(_path)
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endif()
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set(_numpy_include_dirs "${${numpy_include_dirs}}")
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if(NOT _numpy_include_dirs)
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if(CMAKE_CROSSCOMPILING)
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message(STATUS "Cannot probe for Python/Numpy support (because we are cross-compiling OpenCV)")
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message(STATUS "If you want to enable Python/Numpy support, set the following variables:")
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message(STATUS " PYTHON2_INCLUDE_PATH")
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message(STATUS " PYTHON2_LIBRARIES (optional on Unix-like systems)")
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message(STATUS " PYTHON2_NUMPY_INCLUDE_DIRS")
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message(STATUS " PYTHON3_INCLUDE_PATH")
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message(STATUS " PYTHON3_LIBRARIES (optional on Unix-like systems)")
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message(STATUS " PYTHON3_NUMPY_INCLUDE_DIRS")
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else()
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# Attempt to discover the NumPy include directory. If this succeeds, then build python API with NumPy
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execute_process(COMMAND "${_executable}" -c "import os; os.environ['DISTUTILS_USE_SDK']='1'; import numpy.distutils; print(os.pathsep.join(numpy.distutils.misc_util.get_numpy_include_dirs()))"
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RESULT_VARIABLE _numpy_process
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OUTPUT_VARIABLE _numpy_include_dirs
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OUTPUT_STRIP_TRAILING_WHITESPACE)
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if(NOT _numpy_process EQUAL 0)
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unset(_numpy_include_dirs)
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endif()
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endif()
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endif()
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if(_numpy_include_dirs)
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file(TO_CMAKE_PATH "${_numpy_include_dirs}" _numpy_include_dirs)
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if(CMAKE_CROSSCOMPILING)
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if(NOT _numpy_version)
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set(_numpy_version "undefined - cannot be probed because of the cross-compilation")
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endif()
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else()
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execute_process(COMMAND "${_executable}" -c "import numpy; print(numpy.version.version)"
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RESULT_VARIABLE _numpy_process
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OUTPUT_VARIABLE _numpy_version
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OUTPUT_STRIP_TRAILING_WHITESPACE)
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endif()
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endif()
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endif(NOT ANDROID AND NOT IOS)
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endif()
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# Export return values
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set(${found} "${_found}" CACHE INTERNAL "")
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set(${executable} "${_executable}" CACHE FILEPATH "Path to Python interpreter")
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set(${version_string} "${_version_string}" CACHE INTERNAL "")
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set(${version_major} "${_version_major}" CACHE INTERNAL "")
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set(${version_minor} "${_version_minor}" CACHE INTERNAL "")
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set(${libs_found} "${_libs_found}" CACHE INTERNAL "")
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set(${libs_version_string} "${_libs_version_string}" CACHE INTERNAL "")
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set(${libraries} "${_libraries}" CACHE INTERNAL "Python libraries")
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set(${library} "${_library}" CACHE FILEPATH "Path to Python library")
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set(${debug_libraries} "${_debug_libraries}" CACHE INTERNAL "")
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set(${debug_library} "${_debug_library}" CACHE FILEPATH "Path to Python debug")
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set(${include_path} "${_include_path}" CACHE INTERNAL "")
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set(${include_dir} "${_include_dir}" CACHE PATH "Python include dir")
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set(${include_dir2} "${_include_dir2}" CACHE PATH "Python include dir 2")
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set(${packages_path} "${_packages_path}" CACHE PATH "Where to install the python packages.")
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set(${numpy_include_dirs} ${_numpy_include_dirs} CACHE PATH "Path to numpy headers")
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set(${numpy_version} "${_numpy_version}" CACHE INTERNAL "")
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endif()
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endfunction(find_python)
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if(OPENCV_PYTHON_SKIP_DETECTION)
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return()
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endif()
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find_python("" "${MIN_VER_PYTHON2}" PYTHON2_LIBRARY PYTHON2_INCLUDE_DIR
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PYTHON2INTERP_FOUND PYTHON2_EXECUTABLE PYTHON2_VERSION_STRING
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PYTHON2_VERSION_MAJOR PYTHON2_VERSION_MINOR PYTHON2LIBS_FOUND
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PYTHON2LIBS_VERSION_STRING PYTHON2_LIBRARIES PYTHON2_LIBRARY
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PYTHON2_DEBUG_LIBRARIES PYTHON2_LIBRARY_DEBUG PYTHON2_INCLUDE_PATH
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PYTHON2_INCLUDE_DIR PYTHON2_INCLUDE_DIR2 PYTHON2_PACKAGES_PATH
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PYTHON2_NUMPY_INCLUDE_DIRS PYTHON2_NUMPY_VERSION)
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option(OPENCV_PYTHON3_VERSION "Python3 version" "")
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find_python("${OPENCV_PYTHON3_VERSION}" "${MIN_VER_PYTHON3}" PYTHON3_LIBRARY PYTHON3_INCLUDE_DIR
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PYTHON3INTERP_FOUND PYTHON3_EXECUTABLE PYTHON3_VERSION_STRING
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PYTHON3_VERSION_MAJOR PYTHON3_VERSION_MINOR PYTHON3LIBS_FOUND
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PYTHON3LIBS_VERSION_STRING PYTHON3_LIBRARIES PYTHON3_LIBRARY
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PYTHON3_DEBUG_LIBRARIES PYTHON3_LIBRARY_DEBUG PYTHON3_INCLUDE_PATH
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PYTHON3_INCLUDE_DIR PYTHON3_INCLUDE_DIR2 PYTHON3_PACKAGES_PATH
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PYTHON3_NUMPY_INCLUDE_DIRS PYTHON3_NUMPY_VERSION)
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if(PYTHON_DEFAULT_EXECUTABLE)
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set(PYTHON_DEFAULT_AVAILABLE "TRUE")
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elseif(PYTHON2_EXECUTABLE AND PYTHON2INTERP_FOUND)
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# Use Python 2 as default Python interpreter
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set(PYTHON_DEFAULT_AVAILABLE "TRUE")
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set(PYTHON_DEFAULT_EXECUTABLE "${PYTHON2_EXECUTABLE}")
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elseif(PYTHON3_EXECUTABLE AND PYTHON3INTERP_FOUND)
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# Use Python 3 as fallback Python interpreter (if there is no Python 2)
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set(PYTHON_DEFAULT_AVAILABLE "TRUE")
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set(PYTHON_DEFAULT_EXECUTABLE "${PYTHON3_EXECUTABLE}")
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endif()
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