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435 lines
14 KiB
CMake
435 lines
14 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file Copyright.txt or https://cmake.org/licensing for details.
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#[=======================================================================[.rst:
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FindPython2
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-----------
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.. versionadded:: 3.12
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Find Python 2 interpreter, compiler and development environment (include
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directories and libraries).
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.. versionadded:: 3.19
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When a version is requested, it can be specified as a simple value or as a
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range. For a detailed description of version range usage and capabilities,
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refer to the :command:`find_package` command.
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The following components are supported:
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* ``Interpreter``: search for Python 2 interpreter
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* ``Compiler``: search for Python 2 compiler. Only offered by IronPython.
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* ``Development``: search for development artifacts (include directories and
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libraries).
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.. versionadded:: 3.18
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This component includes two sub-components which can be specified
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independently:
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* ``Development.Module``: search for artifacts for Python 2 module
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developments.
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* ``Development.Embed``: search for artifacts for Python 2 embedding
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developments.
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* ``NumPy``: search for NumPy include directories.
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.. versionadded:: 3.14
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Added the ``NumPy`` component.
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If no ``COMPONENTS`` are specified, ``Interpreter`` is assumed.
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If component ``Development`` is specified, it implies sub-components
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``Development.Module`` and ``Development.Embed``.
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To ensure consistent versions between components ``Interpreter``, ``Compiler``,
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``Development`` (or one of its sub-components) and ``NumPy``, specify all
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components at the same time::
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find_package (Python2 COMPONENTS Interpreter Development)
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This module looks only for version 2 of Python. This module can be used
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concurrently with :module:`FindPython3` module to use both Python versions.
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The :module:`FindPython` module can be used if Python version does not matter
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for you.
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.. note::
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If components ``Interpreter`` and ``Development`` (or one of its
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sub-components) are both specified, this module search only for interpreter
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with same platform architecture as the one defined by ``CMake``
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configuration. This constraint does not apply if only ``Interpreter``
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component is specified.
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Imported Targets
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^^^^^^^^^^^^^^^^
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This module defines the following :ref:`Imported Targets <Imported Targets>`:
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.. versionchanged:: 3.14
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:ref:`Imported Targets <Imported Targets>` are only created when
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:prop_gbl:`CMAKE_ROLE` is ``PROJECT``.
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``Python2::Interpreter``
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Python 2 interpreter. Target defined if component ``Interpreter`` is found.
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``Python2::Compiler``
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Python 2 compiler. Target defined if component ``Compiler`` is found.
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``Python2::Module``
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.. versionadded:: 3.15
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Python 2 library for Python module. Target defined if component
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``Development.Module`` is found.
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``Python2::Python``
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Python 2 library for Python embedding. Target defined if component
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``Development.Embed`` is found.
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``Python2::NumPy``
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.. versionadded:: 3.14
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NumPy library for Python 2. Target defined if component ``NumPy`` is found.
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Result Variables
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^^^^^^^^^^^^^^^^
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This module will set the following variables in your project
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(see :ref:`Standard Variable Names <CMake Developer Standard Variable Names>`):
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``Python2_FOUND``
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System has the Python 2 requested components.
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``Python2_Interpreter_FOUND``
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System has the Python 2 interpreter.
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``Python2_EXECUTABLE``
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Path to the Python 2 interpreter.
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``Python2_INTERPRETER_ID``
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A short string unique to the interpreter. Possible values include:
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* Python
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* ActivePython
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* Anaconda
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* Canopy
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* IronPython
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* PyPy
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``Python2_STDLIB``
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Standard platform independent installation directory.
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Information returned by
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``distutils.sysconfig.get_python_lib(plat_specific=False,standard_lib=True)``
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or else ``sysconfig.get_path('stdlib')``.
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``Python2_STDARCH``
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Standard platform dependent installation directory.
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Information returned by
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``distutils.sysconfig.get_python_lib(plat_specific=True,standard_lib=True)``
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or else ``sysconfig.get_path('platstdlib')``.
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``Python2_SITELIB``
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Third-party platform independent installation directory.
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Information returned by
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``distutils.sysconfig.get_python_lib(plat_specific=False,standard_lib=False)``
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or else ``sysconfig.get_path('purelib')``.
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``Python2_SITEARCH``
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Third-party platform dependent installation directory.
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Information returned by
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``distutils.sysconfig.get_python_lib(plat_specific=True,standard_lib=False)``
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or else ``sysconfig.get_path('platlib')``.
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``Python2_Compiler_FOUND``
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System has the Python 2 compiler.
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``Python2_COMPILER``
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Path to the Python 2 compiler. Only offered by IronPython.
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``Python2_COMPILER_ID``
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A short string unique to the compiler. Possible values include:
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* IronPython
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``Python2_DOTNET_LAUNCHER``
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.. versionadded:: 3.18
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The ``.Net`` interpreter. Only used by ``IronPython`` implementation.
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``Python2_Development_FOUND``
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System has the Python 2 development artifacts.
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``Python2_Development.Module_FOUND``
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.. versionadded:: 3.18
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System has the Python 2 development artifacts for Python module.
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``Python2_Development.Embed_FOUND``
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.. versionadded:: 3.18
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System has the Python 2 development artifacts for Python embedding.
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``Python2_INCLUDE_DIRS``
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The Python 2 include directories.
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``Python2_LINK_OPTIONS``
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.. versionadded:: 3.19
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The Python 2 link options. Some configurations require specific link options
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for a correct build and execution.
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``Python2_LIBRARIES``
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The Python 2 libraries.
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``Python2_LIBRARY_DIRS``
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The Python 2 library directories.
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``Python2_RUNTIME_LIBRARY_DIRS``
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The Python 2 runtime library directories.
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``Python2_VERSION``
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Python 2 version.
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``Python2_VERSION_MAJOR``
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Python 2 major version.
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``Python2_VERSION_MINOR``
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Python 2 minor version.
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``Python2_VERSION_PATCH``
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Python 2 patch version.
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``Python2_PyPy_VERSION``
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.. versionadded:: 3.18
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Python 2 PyPy version.
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``Python2_NumPy_FOUND``
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.. versionadded:: 3.14
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System has the NumPy.
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``Python2_NumPy_INCLUDE_DIRS``
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.. versionadded:: 3.14
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The NumPy include directories.
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``Python2_NumPy_VERSION``
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.. versionadded:: 3.14
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The NumPy version.
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Hints
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^^^^^
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``Python2_ROOT_DIR``
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Define the root directory of a Python 2 installation.
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``Python2_USE_STATIC_LIBS``
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* If not defined, search for shared libraries and static libraries in that
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order.
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* If set to TRUE, search **only** for static libraries.
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* If set to FALSE, search **only** for shared libraries.
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.. note::
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This hint will be ignored on ``Windows`` because static libraries are not
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available on this platform.
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``Python2_FIND_STRATEGY``
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.. versionadded:: 3.15
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This variable defines how lookup will be done.
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The ``Python2_FIND_STRATEGY`` variable can be set to one of the following:
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* ``VERSION``: Try to find the most recent version in all specified
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locations.
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This is the default if policy :policy:`CMP0094` is undefined or set to
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``OLD``.
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* ``LOCATION``: Stops lookup as soon as a version satisfying version
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constraints is founded.
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This is the default if policy :policy:`CMP0094` is set to ``NEW``.
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``Python2_FIND_REGISTRY``
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.. versionadded:: 3.13
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On Windows the ``Python2_FIND_REGISTRY`` variable determine the order
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of preference between registry and environment variables.
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the ``Python2_FIND_REGISTRY`` variable can be set to one of the following:
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* ``FIRST``: Try to use registry before environment variables.
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This is the default.
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* ``LAST``: Try to use registry after environment variables.
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* ``NEVER``: Never try to use registry.
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``Python2_FIND_FRAMEWORK``
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.. versionadded:: 3.15
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On macOS the ``Python2_FIND_FRAMEWORK`` variable determine the order of
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preference between Apple-style and unix-style package components.
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This variable can take same values as :variable:`CMAKE_FIND_FRAMEWORK`
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variable.
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.. note::
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Value ``ONLY`` is not supported so ``FIRST`` will be used instead.
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If ``Python2_FIND_FRAMEWORK`` is not defined, :variable:`CMAKE_FIND_FRAMEWORK`
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variable will be used, if any.
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``Python2_FIND_VIRTUALENV``
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.. versionadded:: 3.15
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This variable defines the handling of virtual environments managed by
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``virtualenv`` or ``conda``. It is meaningful only when a virtual environment
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is active (i.e. the ``activate`` script has been evaluated). In this case, it
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takes precedence over ``Python2_FIND_REGISTRY`` and ``CMAKE_FIND_FRAMEWORK``
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variables. The ``Python2_FIND_VIRTUALENV`` variable can be set to one of the
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following:
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* ``FIRST``: The virtual environment is used before any other standard
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paths to look-up for the interpreter. This is the default.
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* ``ONLY``: Only the virtual environment is used to look-up for the
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interpreter.
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* ``STANDARD``: The virtual environment is not used to look-up for the
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interpreter but environment variable ``PATH`` is always considered.
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In this case, variable ``Python2_FIND_REGISTRY`` (Windows) or
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``CMAKE_FIND_FRAMEWORK`` (macOS) can be set with value ``LAST`` or
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``NEVER`` to select preferably the interpreter from the virtual
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environment.
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.. versionadded:: 3.17
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Added support for ``conda`` environments.
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.. note::
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If the component ``Development`` is requested, it is **strongly**
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recommended to also include the component ``Interpreter`` to get expected
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result.
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``Python2_FIND_IMPLEMENTATIONS``
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.. versionadded:: 3.18
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This variable defines, in an ordered list, the different implementations
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which will be searched. The ``Python2_FIND_IMPLEMENTATIONS`` variable can
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hold the following values:
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* ``CPython``: this is the standard implementation. Various products, like
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``Anaconda`` or ``ActivePython``, rely on this implementation.
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* ``IronPython``: This implementation use the ``CSharp`` language for
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``.NET Framework`` on top of the `Dynamic Language Runtime` (``DLR``).
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See `IronPython <https://ironpython.net>`_.
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* ``PyPy``: This implementation use ``RPython`` language and
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``RPython translation toolchain`` to produce the python interpreter.
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See `PyPy <https://www.pypy.org>`_.
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The default value is:
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* Windows platform: ``CPython``, ``IronPython``
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* Other platforms: ``CPython``
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.. note::
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This hint has the lowest priority of all hints, so even if, for example,
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you specify ``IronPython`` first and ``CPython`` in second, a python
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product based on ``CPython`` can be selected because, for example with
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``Python2_FIND_STRATEGY=LOCATION``, each location will be search first for
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``IronPython`` and second for ``CPython``.
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.. note::
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When ``IronPython`` is specified, on platforms other than ``Windows``, the
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``.Net`` interpreter (i.e. ``mono`` command) is expected to be available
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through the ``PATH`` variable.
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``Python2_FIND_UNVERSIONED_NAMES``
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.. versionadded:: 3.20
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This variable defines how the generic names will be searched. Currently, it
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only applies to the generic names of the interpreter, namely, ``python2`` and
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``python``.
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The ``Python2_FIND_UNVERSIONED_NAMES`` variable can be set to one of the
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following values:
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* ``FIRST``: The generic names are searched before the more specialized ones
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(such as ``python2.5`` for example).
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* ``LAST``: The generic names are searched after the more specialized ones.
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This is the default.
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* ``NEVER``: The generic name are not searched at all.
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Artifacts Specification
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^^^^^^^^^^^^^^^^^^^^^^^
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.. versionadded:: 3.16
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To solve special cases, it is possible to specify directly the artifacts by
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setting the following variables:
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``Python2_EXECUTABLE``
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The path to the interpreter.
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``Python2_COMPILER``
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The path to the compiler.
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``Python2_DOTNET_LAUNCHER``
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.. versionadded:: 3.18
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The ``.Net`` interpreter. Only used by ``IronPython`` implementation.
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``Python2_LIBRARY``
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The path to the library. It will be used to compute the
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variables ``Python2_LIBRARIES``, ``Python2_LIBRARY_DIRS`` and
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``Python2_RUNTIME_LIBRARY_DIRS``.
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``Python2_INCLUDE_DIR``
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The path to the directory of the ``Python`` headers. It will be used to
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compute the variable ``Python2_INCLUDE_DIRS``.
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``Python2_NumPy_INCLUDE_DIR``
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The path to the directory of the ``NumPy`` headers. It will be used to
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compute the variable ``Python2_NumPy_INCLUDE_DIRS``.
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.. note::
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All paths must be absolute. Any artifact specified with a relative path
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will be ignored.
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.. note::
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When an artifact is specified, all ``HINTS`` will be ignored and no search
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will be performed for this artifact.
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If more than one artifact is specified, it is the user's responsibility to
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ensure the consistency of the various artifacts.
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By default, this module supports multiple calls in different directories of a
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project with different version/component requirements while providing correct
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and consistent results for each call. To support this behavior, ``CMake`` cache
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is not used in the traditional way which can be problematic for interactive
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specification. So, to enable also interactive specification, module behavior
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can be controlled with the following variable:
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``Python2_ARTIFACTS_INTERACTIVE``
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.. versionadded:: 3.18
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Selects the behavior of the module. This is a boolean variable:
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* If set to ``TRUE``: Create CMake cache entries for the above artifact
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specification variables so that users can edit them interactively.
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This disables support for multiple version/component requirements.
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* If set to ``FALSE`` or undefined: Enable multiple version/component
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requirements.
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Commands
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^^^^^^^^
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This module defines the command ``Python2_add_library`` (when
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:prop_gbl:`CMAKE_ROLE` is ``PROJECT``), which has the same semantics as
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:command:`add_library` and adds a dependency to target ``Python2::Python`` or,
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when library type is ``MODULE``, to target ``Python2::Module`` and takes care
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of Python module naming rules::
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Python2_add_library (<name> [STATIC | SHARED | MODULE]
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<source1> [<source2> ...])
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If library type is not specified, ``MODULE`` is assumed.
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#]=======================================================================]
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set (_PYTHON_PREFIX Python2)
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set (_Python2_REQUIRED_VERSION_MAJOR 2)
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include (${CMAKE_CURRENT_LIST_DIR}/FindPython/Support.cmake)
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if (COMMAND __Python2_add_library)
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macro (Python2_add_library)
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__Python2_add_library (Python2 ${ARGV})
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endmacro()
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endif()
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unset (_PYTHON_PREFIX)
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