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Diffstat (limited to 'Modules/FindPythonInterp.cmake')
| -rw-r--r-- | Modules/FindPythonInterp.cmake | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/Modules/FindPythonInterp.cmake b/Modules/FindPythonInterp.cmake new file mode 100644 index 0000000..64b98a8 --- /dev/null +++ b/Modules/FindPythonInterp.cmake @@ -0,0 +1,154 @@ +# Distributed under the OSI-approved BSD 3-Clause License. See accompanying +# file Copyright.txt or https://cmake.org/licensing for details. + +#.rst: +# FindPythonInterp +# ---------------- +# +# 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). +# +# If calling both ``find_package(PythonInterp)`` and +# ``find_package(PythonLibs)``, call ``find_package(PythonInterp)`` first to +# get the currently active Python version by default with a consistent version +# of PYTHON_LIBRARIES. + +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 3.7 3.6 3.5 3.4 3.3 3.2 3.1 3.0) + +if(PythonInterp_FIND_VERSION) + if(PythonInterp_FIND_VERSION_COUNT GREATER 1) + set(_PYTHON_FIND_MAJ_MIN "${PythonInterp_FIND_VERSION_MAJOR}.${PythonInterp_FIND_VERSION_MINOR}") + list(APPEND _Python_NAMES + python${_PYTHON_FIND_MAJ_MIN} + python${PythonInterp_FIND_VERSION_MAJOR}) + unset(_PYTHON_FIND_OTHER_VERSIONS) + if(NOT PythonInterp_FIND_VERSION_EXACT) + foreach(_PYTHON_V ${_PYTHON${PythonInterp_FIND_VERSION_MAJOR}_VERSIONS}) + if(NOT _PYTHON_V VERSION_LESS _PYTHON_FIND_MAJ_MIN) + list(APPEND _PYTHON_FIND_OTHER_VERSIONS ${_PYTHON_V}) + endif() + endforeach() + endif() + unset(_PYTHON_FIND_MAJ_MIN) + else() + list(APPEND _Python_NAMES python${PythonInterp_FIND_VERSION_MAJOR}) + set(_PYTHON_FIND_OTHER_VERSIONS ${_PYTHON${PythonInterp_FIND_VERSION_MAJOR}_VERSIONS}) + endif() +else() + set(_PYTHON_FIND_OTHER_VERSIONS ${_PYTHON3_VERSIONS} ${_PYTHON2_VERSIONS} ${_PYTHON1_VERSIONS}) +endif() +find_program(PYTHON_EXECUTABLE NAMES ${_Python_NAMES}) + +# 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 ${Python_ADDITIONAL_VERSIONS}) +# If FindPythonInterp has already found the major and minor version, +# insert that version next to get consistent versions of the interpreter and +# library. +if(DEFINED PYTHONLIBS_VERSION_STRING) + string(REPLACE "." ";" _PYTHONLIBS_VERSION "${PYTHONLIBS_VERSION_STRING}") + list(GET _PYTHONLIBS_VERSION 0 _PYTHONLIBS_VERSION_MAJOR) + list(GET _PYTHONLIBS_VERSION 1 _PYTHONLIBS_VERSION_MINOR) + list(APPEND _Python_VERSIONS ${_PYTHONLIBS_VERSION_MAJOR}.${_PYTHONLIBS_VERSION_MINOR}) +endif() +# Search for the current active python version first +list(APPEND _Python_VERSIONS ";") +list(APPEND _Python_VERSIONS ${_PYTHON_FIND_OTHER_VERSIONS}) + +unset(_PYTHON_FIND_OTHER_VERSIONS) +unset(_PYTHON1_VERSIONS) +unset(_PYTHON2_VERSIONS) +unset(_PYTHON3_VERSIONS) + +# Search for newest python version if python executable isn't found +if(NOT PYTHON_EXECUTABLE) + foreach(_CURRENT_VERSION IN LISTS _Python_VERSIONS) + set(_Python_NAMES python${_CURRENT_VERSION}) + if(CMAKE_HOST_WIN32) + list(APPEND _Python_NAMES python) + endif() + find_program(PYTHON_EXECUTABLE + NAMES ${_Python_NAMES} + PATHS + [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}\\InstallPath] + [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}-32\\InstallPath] + [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}-64\\InstallPath] + ) + 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]+)") + set(PYTHON_VERSION_PATCH "${CMAKE_MATCH_1}") + else() + set(PYTHON_VERSION_PATCH "0") + endif() + else() + # sys.version was first documented for Python 1.5, so assume + # this is older. + set(PYTHON_VERSION_STRING "1.4") + set(PYTHON_VERSION_MAJOR "1") + set(PYTHON_VERSION_MINOR "4") + set(PYTHON_VERSION_PATCH "0") + endif() + endif() + unset(_PYTHON_VERSION_RESULT) + unset(_VERSION) +endif() + +include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake) +FIND_PACKAGE_HANDLE_STANDARD_ARGS(PythonInterp REQUIRED_VARS PYTHON_EXECUTABLE VERSION_VAR PYTHON_VERSION_STRING) + +mark_as_advanced(PYTHON_EXECUTABLE) |