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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#[=======================================================================[.rst:
FindPython
----------
Find Python interpreter, compiler and development environment (include
directories and libraries).
Three components are supported:
* ``Interpreter``: search for Python interpreter.
* ``Compiler``: search for Python compiler. Only offered by IronPython.
* ``Development``: search for development artifacts (include directories and
libraries).
If no ``COMPONENTS`` is specified, ``Interpreter`` is assumed.
To ensure consistent versions between components ``Interpreter``, ``Compiler``
and ``Development``, specify all components at the same time::
find_package (Python COMPONENTS Interpreter Development)
This module looks preferably for version 3 of Python. If not found, version 2
is searched.
To manage concurrent versions 3 and 2 of Python, use :module:`FindPython3` and
:module:`FindPython2` modules rather than this one.
Imported Targets
^^^^^^^^^^^^^^^^
This module defines the following :ref:`Imported Targets <Imported Targets>`:
``Python::Interpreter``
Python interpreter. Target defined if component ``Interpreter`` is found.
``Python::Compiler``
Python compiler. Target defined if component ``Compiler`` is found.
``Python::Python``
Python library. Target defined if component ``Development`` is found.
Result Variables
^^^^^^^^^^^^^^^^
This module will set the following variables in your project
(see :ref:`Standard Variable Names <CMake Developer Standard Variable Names>`):
``Python_FOUND``
System has the Python requested components.
``Python_Interpreter_FOUND``
System has the Python interpreter.
``Python_EXECUTABLE``
Path to the Python interpreter.
``Python_INTERPRETER_ID``
A short string unique to the interpreter. Possible values include:
* Python
* ActivePython
* Anaconda
* Canopy
* IronPython
``Python_STDLIB``
Standard platform independent installation directory.
Information returned by
``distutils.sysconfig.get_python_lib(plat_specific=False,standard_lib=True)``.
``Python_STDARCH``
Standard platform dependent installation directory.
Information returned by
``distutils.sysconfig.get_python_lib(plat_specific=True,standard_lib=True)``.
``Python_SITELIB``
Third-party platform independent installation directory.
Information returned by
``distutils.sysconfig.get_python_lib(plat_specific=False,standard_lib=False)``.
``Python_SITEARCH``
Third-party platform dependent installation directory.
Information returned by
``distutils.sysconfig.get_python_lib(plat_specific=True,standard_lib=False)``.
``Python_Compiler_FOUND``
System has the Python compiler.
``Python_COMPILER``
Path to the Python compiler. Only offered by IronPython.
``Python_COMPILER_ID``
A short string unique to the compiler. Possible values include:
* IronPython
``Python_Development_FOUND``
System has the Python development artifacts.
``Python_INCLUDE_DIRS``
The Python include directories.
``Python_LIBRARIES``
The Python libraries.
``Python_LIBRARY_DIRS``
The Python library directories.
``Python_RUNTIME_LIBRARY_DIRS``
The Python runtime library directories.
``Python_VERSION``
Python version.
``Python_VERSION_MAJOR``
Python major version.
``Python_VERSION_MINOR``
Python minor version.
``Python_VERSION_PATCH``
Python patch version.
Hints
^^^^^
``Python_ROOT_DIR``
Define the root directory of a Python installation.
``Python_USE_STATIC_LIBS``
* If not defined, search for shared libraries and static libraries in that
order.
* If set to TRUE, search **only** for static libraries.
* If set to FALSE, search **only** for shared libraries.
``Python_FIND_REGISTRY``
On Windows the ``Python_FIND_REGISTRY`` variable determine the order
of preference between registry and environment variables.
the ``Python_FIND_REGISTRY`` variable can be set to empty or one of the
following:
* ``FIRST``: Try to use registry before environment variables.
This is the default.
* ``LAST``: Try to use registry after environment variables.
* ``NEVER``: Never try to use registry.
``CMAKE_FIND_FRAMEWORK``
On OS X the :variable:`CMAKE_FIND_FRAMEWORK` variable determine the order of
preference between Apple-style and unix-style package components.
.. note::
Value ``ONLY`` is not supported so ``FIRST`` will be used instead.
Commands
^^^^^^^^
This module defines the command ``Python_add_library`` which have the same
semantic as :command:`add_library` but take care of Python module naming rules
(only applied if library is of type ``MODULE``) and add dependency to target
``Python::Python``::
Python_add_library (my_module MODULE src1.cpp)
If library type is not specified, ``MODULE`` is assumed.
#]=======================================================================]
set (_PYTHON_PREFIX Python)
if (DEFINED Python_FIND_VERSION)
set (_Python_REQUIRED_VERSION_MAJOR ${Python_FIND_VERSION_MAJOR})
include (${CMAKE_CURRENT_LIST_DIR}/FindPython/Support.cmake)
else()
# iterate over versions in quiet and NOT required modes to avoid multiple
# "Found" messages and prematurally failure.
set (_Python_QUIETLY ${Python_FIND_QUIETLY})
set (_Python_REQUIRED ${Python_FIND_REQUIRED})
set (Python_FIND_QUIETLY TRUE)
set (Python_FIND_REQUIRED FALSE)
set (_Python_REQUIRED_VERSIONS 3 2)
set (_Python_REQUIRED_VERSION_LAST 2)
foreach (_Python_REQUIRED_VERSION_MAJOR IN LISTS _Python_REQUIRED_VERSIONS)
set (Python_FIND_VERSION ${_Python_REQUIRED_VERSION_MAJOR})
include (${CMAKE_CURRENT_LIST_DIR}/FindPython/Support.cmake)
if (Python_FOUND OR
_Python_REQUIRED_VERSION_MAJOR EQUAL _Python_REQUIRED_VERSION_LAST)
break()
endif()
# clean-up some CACHE variables to ensure look-up restart from scratch
foreach (_Python_ITEM IN LISTS _Python_CACHED_VARS)
unset (${_Python_ITEM} CACHE)
endforeach()
endforeach()
unset (Python_FIND_VERSION)
set (Python_FIND_QUIETLY ${_Python_QUIETLY})
set (Python_FIND_REQUIRED ${_Python_REQUIRED})
if (Python_FIND_REQUIRED OR NOT Python_FIND_QUIETLY)
# call again validation command to get "Found" or error message
find_package_handle_standard_args (Python HANDLE_COMPONENTS
REQUIRED_VARS ${_Python_REQUIRED_VARS}
VERSION_VAR Python_VERSION)
endif()
endif()
if (COMMAND __Python_add_library)
macro (Python_add_library)
__Python_add_library (Python ${ARGV})
endmacro()
endif()
unset (_PYTHON_PREFIX)
|
