# - Find python interpreter # This module finds if Python interpreter is installed and determines where the # executables are. This code sets the following variables: # # PYTHONINTERP_FOUND - Was the Python executable found # PYTHON_EXECUTABLE - path to the Python interpreter # # PYTHON_VERSION_STRING - Python version found e.g. 2.5.2 # PYTHON_VERSION_MAJOR - Python major version found e.g. 2 # PYTHON_VERSION_MINOR - Python minor version found e.g. 5 # PYTHON_VERSION_PATCH - Python patch version found e.g. 2 # # The Python_ADDITIONAL_VERSIONS variable can be used to specify a list of # version numbers that should be taken into account when searching for Python. # You need to set this variable before calling find_package(PythonInterp). # # You can point to a preferred python install to use by setting the following # to the point at the root directory of the python install: # # PYTHON_ROOT_DIR - The root directory of the python install #============================================================================= # Copyright 2005-2010 Kitware, Inc. # Copyright 2011 Bjoern Ricks # Copyright 2012 Rolf Eike Beer # # Distributed under the OSI-approved BSD License (the "License"); # see accompanying file Copyright.txt for details. # # This software is distributed WITHOUT ANY WARRANTY; without even the # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. # See the License for more information. #============================================================================= # (To distribute this file outside of CMake, substitute the full # License text for the above reference.) unset(_Python_NAMES) set(_PYTHON1_VERSIONS 1.6 1.5) set(_PYTHON2_VERSIONS 2.7 2.6 2.5 2.4 2.3 2.2 2.1 2.0) set(_PYTHON3_VERSIONS 3.9 3.8 3.7 3.6 3.5 3.4 3.3 3.2 3.1 3.0) if(PythonInterp_FIND_VERSION) if(PythonInterp_FIND_VERSION MATCHES "^[0-9]+\\.[0-9]+(\\.[0-9]+.*)?$") string(REGEX REPLACE "^([0-9]+\\.[0-9]+).*" "\\1" _PYTHON_FIND_MAJ_MIN "${PythonInterp_FIND_VERSION}") string(REGEX REPLACE "^([0-9]+).*" "\\1" _PYTHON_FIND_MAJ "${_PYTHON_FIND_MAJ_MIN}") list(APPEND _Python_NAMES python${_PYTHON_FIND_MAJ_MIN} python${_PYTHON_FIND_MAJ}) unset(_PYTHON_FIND_OTHER_VERSIONS) if(NOT PythonInterp_FIND_VERSION_EXACT) foreach(_PYTHON_V ${_PYTHON${_PYTHON_FIND_MAJ}_VERSIONS}) if(NOT _PYTHON_V VERSION_LESS _PYTHON_FIND_MAJ_MIN) list(APPEND _PYTHON_FIND_OTHER_VERSIONS ${_PYTHON_V}) endif() endforeach() endif() unset(_PYTHON_FIND_MAJ_MIN) unset(_PYTHON_FIND_MAJ) else() list(APPEND _Python_NAMES python${PythonInterp_FIND_VERSION}) set(_PYTHON_FIND_OTHER_VERSIONS ${_PYTHON${PythonInterp_FIND_VERSION}_VERSIONS}) endif() else() set(_PYTHON_FIND_OTHER_VERSIONS ${_PYTHON3_VERSIONS} ${_PYTHON2_VERSIONS} ${_PYTHON1_VERSIONS}) endif() list(APPEND _Python_NAMES python) # Search for the preferred executable first if( ${PYTHON_ROOT_DIR} ) # Search for any of the executable names solely in the directory we've # been pointed to. Failure to find the python executable here is a fatal # fail. find_program(PYTHON_EXECUTABLE NAMES ${_Python_NAMES} PATHS ${PYTHON_ROOT_DIR} NO_DEFAULT_PATH ) else() # If there is no specific path given, look for python in the path find_program(PYTHON_EXECUTABLE NAMES ${_Python_NAMES}) endif() # Set up the versions we know about, in the order we will search. Always add # the user supplied additional versions to the front. set(_Python_VERSIONS ${Python_ADDITIONAL_VERSIONS} ${_PYTHON_FIND_OTHER_VERSIONS} ) unset(_PYTHON_FIND_OTHER_VERSIONS) unset(_PYTHON1_VERSIONS) unset(_PYTHON2_VERSIONS) unset(_PYTHON3_VERSIONS) # Search for newest python version if python executable isn't found if(NOT PYTHON_EXECUTABLE) # If using the MINGW compiler, we mustn't find the standard python # distribution because of multiple C-Runtime errors. We must instead # use the Python-a-mingw-us distribution if(MINGW) list( APPEND _Python_PPATHS ${PYTHON_ROOT_DIR} ) list( APPEND _Python_PPATHS "C:/python/${_CURRENT_VERSION}.9" ) list( APPEND _Python_PPATHS "C:/python/${_CURRENT_VERSION}.8" ) list( APPEND _Python_PPATHS "C:/python/${_CURRENT_VERSION}.7" ) list( APPEND _Python_PPATHS "C:/python/${_CURRENT_VERSION}.6" ) list( APPEND _Python_PPATHS "C:/python/${_CURRENT_VERSION}.5" ) list( APPEND _Python_PPATHS "C:/python/${_CURRENT_VERSION}.4" ) list( APPEND _Python_PPATHS "C:/python/${_CURRENT_VERSION}.3" ) list( APPEND _Python_PPATHS "C:/python/${_CURRENT_VERSION}.2" ) list( APPEND _Python_PPATHS "C:/python/${_CURRENT_VERSION}.1" ) list( APPEND _Python_PPATHS "C:/python/${_CURRENT_VERSION}.0" ) else() list( APPEND _Python_PPATHS [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}\\InstallPath] ) endif() foreach(_CURRENT_VERSION ${_Python_VERSIONS}) set(_Python_NAMES python${_CURRENT_VERSION}) if(WIN32) list(APPEND _Python_NAMES python) endif() find_program(PYTHON_EXECUTABLE NAMES ${_Python_NAMES} PATHS ${_Python_PPATHS} ) endforeach() endif() # determine python version string if(PYTHON_EXECUTABLE) execute_process(COMMAND "${PYTHON_EXECUTABLE}" -c "import sys; sys.stdout.write(';'.join([str(x) for x in sys.version_info[:3]]))" OUTPUT_VARIABLE _VERSION RESULT_VARIABLE _PYTHON_VERSION_RESULT ERROR_QUIET) if(NOT _PYTHON_VERSION_RESULT) string(REPLACE ";" "." PYTHON_VERSION_STRING "${_VERSION}") list(GET _VERSION 0 PYTHON_VERSION_MAJOR) list(GET _VERSION 1 PYTHON_VERSION_MINOR) list(GET _VERSION 2 PYTHON_VERSION_PATCH) if(PYTHON_VERSION_PATCH EQUAL 0) # it's called "Python 2.7", not "2.7.0" string(REGEX REPLACE "\\.0$" "" PYTHON_VERSION_STRING "${PYTHON_VERSION_STRING}") endif() else() # sys.version predates sys.version_info, so use that execute_process(COMMAND "${PYTHON_EXECUTABLE}" -c "import sys; sys.stdout.write(sys.version)" OUTPUT_VARIABLE _VERSION RESULT_VARIABLE _PYTHON_VERSION_RESULT ERROR_QUIET) if(NOT _PYTHON_VERSION_RESULT) string(REGEX REPLACE " .*" "" PYTHON_VERSION_STRING "${_VERSION}") string(REGEX REPLACE "^([0-9]+)\\.[0-9]+.*" "\\1" PYTHON_VERSION_MAJOR "${PYTHON_VERSION_STRING}") string(REGEX REPLACE "^[0-9]+\\.([0-9])+.*" "\\1" PYTHON_VERSION_MINOR "${PYTHON_VERSION_STRING}") if(PYTHON_VERSION_STRING MATCHES "^[0-9]+\\.[0-9]+\\.[0-9]+.*") string(REGEX REPLACE "^[0-9]+\\.[0-9]+\\.([0-9]+).*" "\\1" PYTHON_VERSION_PATCH "${PYTHON_VERSION_STRING}") else() set(PYTHON_VERSION_PATCH "0") endif() else() # sys.version was first documented for Python 1.5, so assume # this is older. set(PYTHON_VERSION_STRING "1.4") set(PYTHON_VERSION_MAJOR "1") set(PYTHON_VERSION_MAJOR "4") set(PYTHON_VERSION_MAJOR "0") endif() endif() unset(_PYTHON_VERSION_RESULT) unset(_VERSION) endif() # handle the QUIETLY and REQUIRED arguments and set PYTHONINTERP_FOUND to TRUE if # all listed variables are TRUE include(FindPackageHandleStandardArgs) find_package_handle_standard_args(PythonInterp REQUIRED_VARS PYTHON_EXECUTABLE VERSION_VAR PYTHON_VERSION_STRING) mark_as_advanced(PYTHON_EXECUTABLE)