# Find specified Python version # Arguments: # preferred_version (value): Version to check for first # min_version (value): Minimum supported version # library_env (value): Name of Python library ENV variable to check # include_dir_env (value): Name of Python include directory ENV variable to check # found (variable): Set if interpreter found # executable (variable): Output of executable found # version_string (variable): Output of found version # version_major (variable): Output of found major version # version_minor (variable): Output of found minor version # libs_found (variable): Set if libs found # libs_version_string (variable): Output of found libs version # libraries (variable): Output of found Python libraries # library (variable): Output of found Python library # debug_libraries (variable): Output of found Python debug libraries # debug_library (variable): Output of found Python debug library # include_path (variable): Output of found Python include path # include_dir (variable): Output of found Python include dir # include_dir2 (variable): Output of found Python include dir2 # packages_path (variable): Output of found Python packages path # numpy_include_dirs (variable): Output of found Python Numpy include dirs # numpy_version (variable): Output of found Python Numpy version function(find_python preferred_version min_version library_env include_dir_env found executable version_string version_major version_minor libs_found libs_version_string libraries library debug_libraries debug_library include_path include_dir include_dir2 packages_path numpy_include_dirs numpy_version) ocv_check_environment_variables(${executable}) if(${executable}) set(PYTHON_EXECUTABLE "${${executable}}") endif() if(WIN32 AND NOT ${executable}) # search for executable with the same bitness as resulting binaries # standard FindPythonInterp always prefers executable from system path # this is really important because we are using the interpreter for numpy search and for choosing the install location foreach(_CURRENT_VERSION ${Python_ADDITIONAL_VERSIONS} "${preferred_version}" "${min_version}") find_host_program(executable NAMES python${_CURRENT_VERSION} python PATHS [HKEY_LOCAL_MACHINE\\\\SOFTWARE\\\\Python\\\\PythonCore\\\\${_CURRENT_VERSION}\\\\InstallPath] [HKEY_CURRENT_USER\\\\SOFTWARE\\\\Python\\\\PythonCore\\\\${_CURRENT_VERSION}\\\\InstallPath] NO_SYSTEM_ENVIRONMENT_PATH ) endforeach() endif() find_host_package(PythonInterp "${preferred_version}") if(NOT PYTHONINTERP_FOUND) find_host_package(PythonInterp "${min_version}") endif() if(PYTHONINTERP_FOUND) # Copy outputs set(_found ${PYTHONINTERP_FOUND}) set(_executable ${PYTHON_EXECUTABLE}) set(_version_string ${PYTHON_VERSION_STRING}) set(_version_major ${PYTHON_VERSION_MAJOR}) set(_version_minor ${PYTHON_VERSION_MINOR}) set(_version_patch ${PYTHON_VERSION_PATCH}) # Clear find_host_package side effects unset(PYTHONINTERP_FOUND) unset(PYTHON_EXECUTABLE CACHE) unset(PYTHON_VERSION_STRING) unset(PYTHON_VERSION_MAJOR) unset(PYTHON_VERSION_MINOR) unset(PYTHON_VERSION_PATCH) endif() if(_found) set(_version_major_minor "${_version_major}.${_version_minor}") if(NOT ANDROID AND NOT IOS) ocv_check_environment_variables(${library_env} ${include_dir_env}) if(NOT ${${library_env}} EQUAL "") set(PYTHON_LIBRARY "${${library_env}}") endif() if(NOT ${${include_dir_env}} EQUAL "") set(PYTHON_INCLUDE_DIR "${${include_dir_env}}") endif() # not using _version_string here, because it might not conform to the CMake version format if(CMAKE_CROSSCOMPILING) # builder version can differ from target, matching base version (e.g. 2.7) find_host_package(PythonLibs "${_version_major_minor}") else() find_host_package(PythonLibs "${_version_major_minor}.${_version_patch}" EXACT) endif() if(PYTHONLIBS_FOUND) # Copy outputs set(_libs_found ${PYTHONLIBS_FOUND}) set(_libraries ${PYTHON_LIBRARIES}) set(_include_path ${PYTHON_INCLUDE_PATH}) set(_include_dirs ${PYTHON_INCLUDE_DIRS}) set(_debug_libraries ${PYTHON_DEBUG_LIBRARIES}) set(_libs_version_string ${PYTHONLIBS_VERSION_STRING}) set(_debug_library ${PYTHON_DEBUG_LIBRARY}) set(_library ${PYTHON_LIBRARY}) set(_library_debug ${PYTHON_LIBRARY_DEBUG}) set(_library_release ${PYTHON_LIBRARY_RELEASE}) set(_include_dir ${PYTHON_INCLUDE_DIR}) set(_include_dir2 ${PYTHON_INCLUDE_DIR2}) # Clear find_host_package side effects unset(PYTHONLIBS_FOUND) unset(PYTHON_LIBRARIES) unset(PYTHON_INCLUDE_PATH) unset(PYTHON_INCLUDE_DIRS) unset(PYTHON_DEBUG_LIBRARIES) unset(PYTHONLIBS_VERSION_STRING) unset(PYTHON_DEBUG_LIBRARY CACHE) unset(PYTHON_LIBRARY) unset(PYTHON_LIBRARY_DEBUG) unset(PYTHON_LIBRARY_RELEASE) unset(PYTHON_LIBRARY CACHE) unset(PYTHON_LIBRARY_DEBUG CACHE) unset(PYTHON_LIBRARY_RELEASE CACHE) unset(PYTHON_INCLUDE_DIR CACHE) unset(PYTHON_INCLUDE_DIR2 CACHE) endif() endif() if(NOT ANDROID AND NOT IOS) if(CMAKE_HOST_UNIX) execute_process(COMMAND ${_executable} -c "from distutils.sysconfig import *; print(get_python_lib())" RESULT_VARIABLE _cvpy_process OUTPUT_VARIABLE _std_packages_path OUTPUT_STRIP_TRAILING_WHITESPACE) if("${_std_packages_path}" MATCHES "site-packages") set(_packages_path "python${_version_major_minor}/site-packages") else() #debian based assumed, install to the dist-packages. set(_packages_path "python${_version_major_minor}/dist-packages") endif() if(EXISTS "${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX}/${${packages_path}}") set(_packages_path "lib${LIB_SUFFIX}/${_packages_path}") else() set(_packages_path "lib/${_packages_path}") endif() elseif(CMAKE_HOST_WIN32) get_filename_component(_path "${_executable}" PATH) file(TO_CMAKE_PATH "${_path}" _path) if(NOT EXISTS "${_path}/Lib/site-packages") unset(_path) get_filename_component(_path "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${_version_major_minor}\\InstallPath]" ABSOLUTE) if(NOT _path) get_filename_component(_path "[HKEY_CURRENT_USER\\SOFTWARE\\Python\\PythonCore\\${_version_major_minor}\\InstallPath]" ABSOLUTE) endif() file(TO_CMAKE_PATH "${_path}" _path) endif() set(_packages_path "${_path}/Lib/site-packages") unset(_path) endif() set(_numpy_include_dirs ${${numpy_include_dirs}}) if(NOT _numpy_include_dirs) if(CMAKE_CROSSCOMPILING) message(STATUS "Cannot probe for Python/Numpy support (because we are cross-compiling OpenCV)") message(STATUS "If you want to enable Python/Numpy support, set the following variables:") message(STATUS " PYTHON2_INCLUDE_PATH") message(STATUS " PYTHON2_LIBRARIES") message(STATUS " PYTHON2_NUMPY_INCLUDE_DIRS") message(STATUS " PYTHON3_INCLUDE_PATH") message(STATUS " PYTHON3_LIBRARIES") message(STATUS " PYTHON3_NUMPY_INCLUDE_DIRS") else() # Attempt to discover the NumPy include directory. If this succeeds, then build python API with NumPy execute_process(COMMAND "${_executable}" -c "import os; os.environ['DISTUTILS_USE_SDK']='1'; import numpy.distutils; print(os.pathsep.join(numpy.distutils.misc_util.get_numpy_include_dirs()))" RESULT_VARIABLE _numpy_process OUTPUT_VARIABLE _numpy_include_dirs OUTPUT_STRIP_TRAILING_WHITESPACE) if(NOT _numpy_process EQUAL 0) unset(_numpy_include_dirs) endif() endif() endif() if(_numpy_include_dirs) file(TO_CMAKE_PATH "${_numpy_include_dirs}" _numpy_include_dirs) if(CMAKE_CROSSCOMPILING) if(NOT _numpy_version) set(_numpy_version "undefined - cannot be probed because of the cross-compilation") endif() else() execute_process(COMMAND "${_executable}" -c "import numpy; print(numpy.version.version)" RESULT_VARIABLE _numpy_process OUTPUT_VARIABLE _numpy_version OUTPUT_STRIP_TRAILING_WHITESPACE) endif() endif() endif(NOT ANDROID AND NOT IOS) endif() # Export return values set(${found} "${_found}" PARENT_SCOPE) set(${executable} "${_executable}" CACHE FILEPATH "Path to Python interpretor") set(${version_string} "${_version_string}" PARENT_SCOPE) set(${version_major} "${_version_major}" PARENT_SCOPE) set(${version_minor} "${_version_minor}" PARENT_SCOPE) set(${libs_found} "${_libs_found}" PARENT_SCOPE) set(${libs_version_string} "${_libs_version_string}" PARENT_SCOPE) set(${libraries} "${_libraries}" PARENT_SCOPE) set(${library} "${_library}" CACHE FILEPATH "Path to Python library") set(${debug_libraries} "${_debug_libraries}" PARENT_SCOPE) set(${debug_library} "${_debug_library}" CACHE FILEPATH "Path to Python debug") set(${include_path} "${_include_path}" PARENT_SCOPE) set(${include_dir} "${_include_dir}" CACHE PATH "Python include dir") set(${include_dir2} "${_include_dir2}" CACHE PATH "Python include dir 2") set(${packages_path} "${_packages_path}" CACHE PATH "Where to install the python packages.") set(${numpy_include_dirs} ${_numpy_include_dirs} CACHE PATH "Path to numpy headers") set(${numpy_version} "${_numpy_version}" PARENT_SCOPE) endfunction(find_python) find_python(2.7 "${MIN_VER_PYTHON2}" PYTHON2_LIBRARY PYTHON2_INCLUDE_DIR PYTHON2INTERP_FOUND PYTHON2_EXECUTABLE PYTHON2_VERSION_STRING PYTHON2_VERSION_MAJOR PYTHON2_VERSION_MINOR PYTHON2LIBS_FOUND PYTHON2LIBS_VERSION_STRING PYTHON2_LIBRARIES PYTHON2_LIBRARY PYTHON2_DEBUG_LIBRARIES PYTHON2_LIBRARY_DEBUG PYTHON2_INCLUDE_PATH PYTHON2_INCLUDE_DIR PYTHON2_INCLUDE_DIR2 PYTHON2_PACKAGES_PATH PYTHON2_NUMPY_INCLUDE_DIRS PYTHON2_NUMPY_VERSION) find_python(3.4 "${MIN_VER_PYTHON3}" PYTHON3_LIBRARY PYTHON3_INCLUDE_DIR PYTHON3INTERP_FOUND PYTHON3_EXECUTABLE PYTHON3_VERSION_STRING PYTHON3_VERSION_MAJOR PYTHON3_VERSION_MINOR PYTHON3LIBS_FOUND PYTHON3LIBS_VERSION_STRING PYTHON3_LIBRARIES PYTHON3_LIBRARY PYTHON3_DEBUG_LIBRARIES PYTHON3_LIBRARY_DEBUG PYTHON3_INCLUDE_PATH PYTHON3_INCLUDE_DIR PYTHON3_INCLUDE_DIR2 PYTHON3_PACKAGES_PATH PYTHON3_NUMPY_INCLUDE_DIRS PYTHON3_NUMPY_VERSION) # Use Python 2 as default Python interpreter if(PYTHON2INTERP_FOUND) set(PYTHON_DEFAULT_AVAILABLE "TRUE") set(PYTHON_DEFAULT_EXECUTABLE "${PYTHON2_EXECUTABLE}") endif()