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166 lines
6.7 KiB
CMake
166 lines
6.7 KiB
CMake
#.rst:
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# FindPythonInterp
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# ----------------
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#
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# Find python interpreter
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#
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# This module finds if Python interpreter is installed and determines
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# where the executables are. This code sets the following variables:
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#
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# ::
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#
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# PYTHONINTERP_FOUND - Was the Python executable found
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# PYTHON_EXECUTABLE - path to the Python interpreter
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#
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#
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#
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# ::
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#
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# PYTHON_VERSION_STRING - Python version found e.g. 2.5.2
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# PYTHON_VERSION_MAJOR - Python major version found e.g. 2
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# PYTHON_VERSION_MINOR - Python minor version found e.g. 5
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# PYTHON_VERSION_PATCH - Python patch version found e.g. 2
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#
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#
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#
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# The Python_ADDITIONAL_VERSIONS variable can be used to specify a list
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# of version numbers that should be taken into account when searching
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# for Python. You need to set this variable before calling
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# find_package(PythonInterp).
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#
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# If calling both ``find_package(PythonInterp)`` and
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# ``find_package(PythonLibs)``, call ``find_package(PythonInterp)`` first to
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# get the currently active Python version by default with a consistent version
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# of PYTHON_LIBRARIES.
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#=============================================================================
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# Copyright 2005-2010 Kitware, Inc.
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# Copyright 2011 Bjoern Ricks <bjoern.ricks@gmail.com>
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# Copyright 2012 Rolf Eike Beer <eike@sf-mail.de>
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#
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# Distributed under the OSI-approved BSD License (the "License");
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# see accompanying file Copyright.txt for details.
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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# (To distribute this file outside of CMake, substitute the full
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# License text for the above reference.)
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unset(_Python_NAMES)
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set(_PYTHON1_VERSIONS 1.6 1.5)
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set(_PYTHON2_VERSIONS 2.7 2.6 2.5 2.4 2.3 2.2 2.1 2.0)
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set(_PYTHON3_VERSIONS 3.6 3.5 3.4 3.3 3.2 3.1 3.0)
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if(PythonInterp_FIND_VERSION)
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if(PythonInterp_FIND_VERSION_COUNT GREATER 1)
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set(_PYTHON_FIND_MAJ_MIN "${PythonInterp_FIND_VERSION_MAJOR}.${PythonInterp_FIND_VERSION_MINOR}")
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list(APPEND _Python_NAMES
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python${_PYTHON_FIND_MAJ_MIN}
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python${PythonInterp_FIND_VERSION_MAJOR})
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unset(_PYTHON_FIND_OTHER_VERSIONS)
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if(NOT PythonInterp_FIND_VERSION_EXACT)
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foreach(_PYTHON_V ${_PYTHON${PythonInterp_FIND_VERSION_MAJOR}_VERSIONS})
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if(NOT _PYTHON_V VERSION_LESS _PYTHON_FIND_MAJ_MIN)
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list(APPEND _PYTHON_FIND_OTHER_VERSIONS ${_PYTHON_V})
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endif()
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endforeach()
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endif()
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unset(_PYTHON_FIND_MAJ_MIN)
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else()
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list(APPEND _Python_NAMES python${PythonInterp_FIND_VERSION_MAJOR})
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set(_PYTHON_FIND_OTHER_VERSIONS ${_PYTHON${PythonInterp_FIND_VERSION_MAJOR}_VERSIONS})
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endif()
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else()
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set(_PYTHON_FIND_OTHER_VERSIONS ${_PYTHON3_VERSIONS} ${_PYTHON2_VERSIONS} ${_PYTHON1_VERSIONS})
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endif()
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find_program(PYTHON_EXECUTABLE NAMES ${_Python_NAMES})
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# Set up the versions we know about, in the order we will search. Always add
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# the user supplied additional versions to the front.
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set(_Python_VERSIONS ${Python_ADDITIONAL_VERSIONS})
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# If FindPythonInterp has already found the major and minor version,
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# insert that version next to get consistent versions of the interpreter and
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# library.
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if(DEFINED PYTHONLIBS_VERSION_STRING)
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string(REPLACE "." ";" _PYTHONLIBS_VERSION "${PYTHONLIBS_VERSION_STRING}")
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list(GET _PYTHONLIBS_VERSION 0 _PYTHONLIBS_VERSION_MAJOR)
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list(GET _PYTHONLIBS_VERSION 1 _PYTHONLIBS_VERSION_MINOR)
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list(APPEND _Python_VERSIONS ${_PYTHONLIBS_VERSION_MAJOR}.${_PYTHONLIBS_VERSION_MINOR})
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endif()
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# Search for the current active python version first
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list(APPEND _Python_VERSIONS ";")
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list(APPEND _Python_VERSIONS ${_PYTHON_FIND_OTHER_VERSIONS})
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unset(_PYTHON_FIND_OTHER_VERSIONS)
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unset(_PYTHON1_VERSIONS)
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unset(_PYTHON2_VERSIONS)
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unset(_PYTHON3_VERSIONS)
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# Search for newest python version if python executable isn't found
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if(NOT PYTHON_EXECUTABLE)
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foreach(_CURRENT_VERSION IN LISTS _Python_VERSIONS)
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set(_Python_NAMES python${_CURRENT_VERSION})
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if(WIN32)
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list(APPEND _Python_NAMES python)
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endif()
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find_program(PYTHON_EXECUTABLE
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NAMES ${_Python_NAMES}
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PATHS [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}\\InstallPath]
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)
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endforeach()
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endif()
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# determine python version string
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if(PYTHON_EXECUTABLE)
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execute_process(COMMAND "${PYTHON_EXECUTABLE}" -c
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"import sys; sys.stdout.write(';'.join([str(x) for x in sys.version_info[:3]]))"
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OUTPUT_VARIABLE _VERSION
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RESULT_VARIABLE _PYTHON_VERSION_RESULT
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ERROR_QUIET)
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if(NOT _PYTHON_VERSION_RESULT)
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string(REPLACE ";" "." PYTHON_VERSION_STRING "${_VERSION}")
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list(GET _VERSION 0 PYTHON_VERSION_MAJOR)
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list(GET _VERSION 1 PYTHON_VERSION_MINOR)
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list(GET _VERSION 2 PYTHON_VERSION_PATCH)
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if(PYTHON_VERSION_PATCH EQUAL 0)
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# it's called "Python 2.7", not "2.7.0"
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string(REGEX REPLACE "\\.0$" "" PYTHON_VERSION_STRING "${PYTHON_VERSION_STRING}")
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endif()
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else()
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# sys.version predates sys.version_info, so use that
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execute_process(COMMAND "${PYTHON_EXECUTABLE}" -c "import sys; sys.stdout.write(sys.version)"
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OUTPUT_VARIABLE _VERSION
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RESULT_VARIABLE _PYTHON_VERSION_RESULT
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ERROR_QUIET)
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if(NOT _PYTHON_VERSION_RESULT)
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string(REGEX REPLACE " .*" "" PYTHON_VERSION_STRING "${_VERSION}")
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string(REGEX REPLACE "^([0-9]+)\\.[0-9]+.*" "\\1" PYTHON_VERSION_MAJOR "${PYTHON_VERSION_STRING}")
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string(REGEX REPLACE "^[0-9]+\\.([0-9])+.*" "\\1" PYTHON_VERSION_MINOR "${PYTHON_VERSION_STRING}")
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if(PYTHON_VERSION_STRING MATCHES "^[0-9]+\\.[0-9]+\\.([0-9]+)")
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set(PYTHON_VERSION_PATCH "${CMAKE_MATCH_1}")
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else()
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set(PYTHON_VERSION_PATCH "0")
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endif()
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else()
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# sys.version was first documented for Python 1.5, so assume
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# this is older.
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set(PYTHON_VERSION_STRING "1.4")
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set(PYTHON_VERSION_MAJOR "1")
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set(PYTHON_VERSION_MINOR "4")
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set(PYTHON_VERSION_PATCH "0")
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endif()
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endif()
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unset(_PYTHON_VERSION_RESULT)
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unset(_VERSION)
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endif()
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# handle the QUIETLY and REQUIRED arguments and set PYTHONINTERP_FOUND to TRUE if
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# all listed variables are TRUE
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include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(PythonInterp REQUIRED_VARS PYTHON_EXECUTABLE VERSION_VAR PYTHON_VERSION_STRING)
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mark_as_advanced(PYTHON_EXECUTABLE)
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