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611 lines
20 KiB
611 lines
20 KiB
# 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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FindPython3
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-----------
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.. versionadded:: 3.12
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Find Python 3 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 3 interpreter
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* ``Compiler``: search for Python 3 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 3 module
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developments.
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* ``Development.Embed``: search for artifacts for Python 3 embedding
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developments.
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.. versionadded:: 3.26
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* ``Development.SABIModule``: search for artifacts for Python 3 module
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developments using the
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`Stable Application Binary Interface <https://docs.python.org/3/c-api/stable.html>`_.
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This component is available only for version ``3.2`` and upper.
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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 (Python3 COMPONENTS Interpreter Development)
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This module looks only for version 3 of Python. This module can be used
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concurrently with :module:`FindPython2` 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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``Python3::Interpreter``
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Python 3 interpreter. This target is defined only if the ``Interpreter``
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component is found.
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``Python3::InterpreterDebug``
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.. versionadded:: 3.30
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Python 3 debug interpreter. This target is defined only if the
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``Interpreter`` component is found and the ``Python3_EXECUTABLE_DEBUG``
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variable is defined. The target is only defined on the ``Windows`` platform.
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``Python3::InterpreterMultiConfig``
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.. versionadded:: 3.30
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Python 3 interpreter. The release or debug version of the interpreter will be
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used, based on the context (platform, configuration).
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This target is defined only if the ``Interpreter`` component is found
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``Python3::Compiler``
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Python 3 compiler. This target is defined only if the ``Compiler`` component
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is found.
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``Python3::Module``
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.. versionadded:: 3.15
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Python 3 library for Python module. Target defined if component
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``Development.Module`` is found.
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``Python3::SABIModule``
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.. versionadded:: 3.26
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Python 3 library for Python module using the Stable Application Binary
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Interface. Target defined if component ``Development.SABIModule`` is found.
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``Python3::Python``
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Python 3 library for Python embedding. Target defined if component
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``Development.Embed`` is found.
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``Python3::NumPy``
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.. versionadded:: 3.14
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NumPy library for Python 3. 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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``Python3_FOUND``
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System has the Python 3 requested components.
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``Python3_Interpreter_FOUND``
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System has the Python 3 interpreter.
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``Python3_EXECUTABLE``
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Path to the Python 3 interpreter.
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``Python3_EXECUTABLE_DEBUG``
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.. versionadded:: 3.30
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Path to the debug Python 3 interpreter. It is only defined on ``Windows``
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platform.
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``Python3_INTERPRETER``
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.. versionadded:: 3.30
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Path to the Python 3 interpreter, defined as a
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:manual:`generator expression <cmake-generator-expressions(7)>` selecting
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the ``Python3_EXECUTABLE`` or ``Python3_EXECUTABLE_DEBUG`` variable based on
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the context (platform, configuration).
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``Python3_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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``Python3_STDLIB``
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Standard platform independent installation directory.
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Information returned by ``sysconfig.get_path('stdlib')``.
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``Python3_STDARCH``
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Standard platform dependent installation directory.
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Information returned by ``sysconfig.get_path('platstdlib')``.
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``Python3_SITELIB``
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Third-party platform independent installation directory.
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Information returned by ``sysconfig.get_path('purelib')``.
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``Python3_SITEARCH``
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Third-party platform dependent installation directory.
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Information returned by ``sysconfig.get_path('platlib')``.
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``Python3_SOABI``
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.. versionadded:: 3.17
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Extension suffix for modules.
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Information computed from ``sysconfig.get_config_var('EXT_SUFFIX')`` or
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``sysconfig.get_config_var('SOABI')`` or
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``python3-config --extension-suffix``.
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``Python3_SOSABI``
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.. versionadded:: 3.26
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Extension suffix for modules using the Stable Application Binary Interface.
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Information computed from ``importlib.machinery.EXTENSION_SUFFIXES`` if the
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COMPONENT ``Interpreter`` was specified. Otherwise, the extension is ``abi3``
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except for ``Windows``, ``MSYS`` and ``CYGWIN`` for which this is an empty
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string.
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``Python3_Compiler_FOUND``
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System has the Python 3 compiler.
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``Python3_COMPILER``
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Path to the Python 3 compiler. Only offered by IronPython.
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``Python3_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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``Python3_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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``Python3_Development_FOUND``
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System has the Python 3 development artifacts.
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``Python3_Development.Module_FOUND``
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.. versionadded:: 3.18
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System has the Python 3 development artifacts for Python module.
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``Python3_Development.SABIModule_FOUND``
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.. versionadded:: 3.26
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System has the Python 3 development artifacts for Python module using the
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Stable Application Binary Interface.
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``Python3_Development.Embed_FOUND``
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.. versionadded:: 3.18
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System has the Python 3 development artifacts for Python embedding.
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``Python3_INCLUDE_DIRS``
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The Python 3 include directories.
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``Python3_DEFINITIONS``
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.. versionadded:: 3.30.3
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The Python 3 preprocessor definitions.
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``Python3_DEBUG_POSTFIX``
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.. versionadded.. 3.30
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Postfix of debug python module. This variable can be used to define the
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:prop_tgt:`DEBUG_POSTFIX` target property.
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``Python3_LINK_OPTIONS``
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.. versionadded:: 3.19
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The Python 3 link options. Some configurations require specific link options
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for a correct build and execution.
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``Python3_LIBRARIES``
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The Python 3 libraries.
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``Python3_LIBRARY_DIRS``
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The Python 3 library directories.
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``Python3_RUNTIME_LIBRARY_DIRS``
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The Python 3 runtime library directories.
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``Python3_SABI_LIBRARIES``
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.. versionadded:: 3.26
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The Python 3 libraries for the Stable Application Binary Interface.
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``Python3_SABI_LIBRARY_DIRS``
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.. versionadded:: 3.26
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The Python 3 ``SABI`` library directories.
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``Python3_RUNTIME_SABI_LIBRARY_DIRS``
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.. versionadded:: 3.26
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The Python 3 runtime ``SABI`` library directories.
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``Python3_VERSION``
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Python 3 version.
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``Python3_VERSION_MAJOR``
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Python 3 major version.
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``Python3_VERSION_MINOR``
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Python 3 minor version.
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``Python3_VERSION_PATCH``
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Python 3 patch version.
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``Python3_PyPy_VERSION``
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.. versionadded:: 3.18
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Python 3 PyPy version.
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``Python3_NumPy_FOUND``
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.. versionadded:: 3.14
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System has the NumPy.
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``Python3_NumPy_INCLUDE_DIRS``
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.. versionadded:: 3.14
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The NumPy include directories.
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``Python3_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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``Python3_ROOT_DIR``
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Define the root directory of a Python 3 installation.
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``Python3_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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``Python3_FIND_ABI``
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.. versionadded:: 3.16
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This variable defines which ABIs, as defined in :pep:`3149`, should be
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searched.
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The ``Python3_FIND_ABI`` variable is a 4-tuple specifying, in that order,
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``pydebug`` (``d``), ``pymalloc`` (``m``), ``unicode`` (``u``) and
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``gil_disabled`` (``t``) flags.
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.. versionadded:: 3.30
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A fourth element, specifying the ``gil_disabled`` flag (i.e. free
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threaded python), is added and is optional. If not specified, the value is
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``OFF``.
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Each element can be set to one of the following:
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* ``ON``: Corresponding flag is selected.
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* ``OFF``: Corresponding flag is not selected.
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* ``ANY``: The two possibilities (``ON`` and ``OFF``) will be searched.
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.. note::
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If ``Python3_FIND_ABI`` is not defined, any ABI, excluding the
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``gil_disabled`` flag, will be searched.
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From this 4-tuple, various ABIs will be searched starting from the most
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specialized to the most general. Moreover, when ``ANY`` is specified for
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``pydebug`` and ``gil_disabled``, ``debug`` and ``free threaded`` versions
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will be searched **after** ``non-debug`` and ``non-gil-disabled`` ones.
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For example, if we have::
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set (Python3_FIND_ABI "ON" "ANY" "ANY" "ON")
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The following flags combinations will be appended, in that order, to the
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artifact names: ``tdmu``, ``tdm``, ``tdu``, and ``td``.
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And to search any possible ABIs::
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set (Python3_FIND_ABI "ANY" "ANY" "ANY" "ANY")
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The following combinations, in that order, will be used: ``mu``, ``m``,
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``u``, ``<empty>``, ``dmu``, ``dm``, ``du``, ``d``, ``tmu``, ``tm``, ``tu``,
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``t``, ``tdmu``, ``tdm``, ``tdu``, and ``td``.
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.. note::
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This hint is useful only on ``POSIX`` systems except for the
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``gil_disabled`` flag. So, on ``Windows`` systems,
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when ``Python_FIND_ABI`` is defined, ``Python`` distributions from
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`python.org <https://www.python.org/>`_ will be found only if the value for
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each flag is ``OFF`` or ``ANY`` except for the fourth one
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(``gil_disabled``).
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``Python3_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 ``Python3_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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See also ``Python3_FIND_UNVERSIONED_NAMES``.
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``Python3_FIND_REGISTRY``
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.. versionadded:: 3.13
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On Windows the ``Python3_FIND_REGISTRY`` variable determine the order
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of preference between registry and environment variables.
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The ``Python3_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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``Python3_FIND_FRAMEWORK``
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.. versionadded:: 3.15
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On macOS the ``Python3_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 ``Python3_FIND_FRAMEWORK`` is not defined, :variable:`CMAKE_FIND_FRAMEWORK`
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variable will be used, if any.
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``Python3_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 ``Python3_FIND_REGISTRY`` and ``CMAKE_FIND_FRAMEWORK``
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variables. The ``Python3_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 ``Python3_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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``Python3_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 ``Python3_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://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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``Python3_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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``Python3_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, ``python3`` and
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``python``.
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The ``Python3_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 ``python3.5`` 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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See also ``Python3_FIND_STRATEGY``.
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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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``Python3_EXECUTABLE``
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The path to the interpreter.
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``Python3_COMPILER``
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The path to the compiler.
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``Python3_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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``Python3_LIBRARY``
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The path to the library. It will be used to compute the
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variables ``Python3_LIBRARIES``, ``Python3_LIBRARY_DIRS`` and
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``Python3_RUNTIME_LIBRARY_DIRS``.
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``Python3_SABI_LIBRARY``
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.. versionadded:: 3.26
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The path to the library for Stable Application Binary Interface. It will be
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used to compute the variables ``Python3_SABI_LIBRARIES``,
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``Python3_SABI_LIBRARY_DIRS`` and ``Python3_RUNTIME_SABI_LIBRARY_DIRS``.
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``Python3_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 ``Python3_INCLUDE_DIRS``.
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``Python3_NumPy_INCLUDE_DIR``
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The path to the directory of the ``NumPy`` headers. It will be used to
|
|
compute the variable ``Python3_NumPy_INCLUDE_DIRS``.
|
|
|
|
.. note::
|
|
|
|
All paths must be absolute. Any artifact specified with a relative path
|
|
will be ignored.
|
|
|
|
.. note::
|
|
|
|
When an artifact is specified, all ``HINTS`` will be ignored and no search
|
|
will be performed for this artifact.
|
|
|
|
If more than one artifact is specified, it is the user's responsibility to
|
|
ensure the consistency of the various artifacts.
|
|
|
|
By default, this module supports multiple calls in different directories of a
|
|
project with different version/component requirements while providing correct
|
|
and consistent results for each call. To support this behavior, CMake cache
|
|
is not used in the traditional way which can be problematic for interactive
|
|
specification. So, to enable also interactive specification, module behavior
|
|
can be controlled with the following variable:
|
|
|
|
``Python3_ARTIFACTS_INTERACTIVE``
|
|
.. versionadded:: 3.18
|
|
|
|
Selects the behavior of the module. This is a boolean variable:
|
|
|
|
* If set to ``TRUE``: Create CMake cache entries for the above artifact
|
|
specification variables so that users can edit them interactively.
|
|
This disables support for multiple version/component requirements.
|
|
* If set to ``FALSE`` or undefined: Enable multiple version/component
|
|
requirements.
|
|
|
|
Commands
|
|
^^^^^^^^
|
|
|
|
This module defines the command ``Python3_add_library`` (when
|
|
:prop_gbl:`CMAKE_ROLE` is ``PROJECT``), which has the same semantics as
|
|
:command:`add_library` and adds a dependency to target ``Python3::Python`` or,
|
|
when library type is ``MODULE``, to target ``Python3::Module`` or
|
|
``Python3::SABIModule`` (when ``USE_SABI`` option is specified) and takes care
|
|
of Python module naming rules::
|
|
|
|
Python3_add_library (<name> [STATIC | SHARED | MODULE [USE_SABI <version>] [WITH_SOABI]]
|
|
<source1> [<source2> ...])
|
|
|
|
If the library type is not specified, ``MODULE`` is assumed.
|
|
|
|
.. versionadded:: 3.17
|
|
For ``MODULE`` library type, if option ``WITH_SOABI`` is specified, the
|
|
module suffix will include the ``Python3_SOABI`` value, if any.
|
|
|
|
.. versionadded:: 3.26
|
|
For ``MODULE`` type, if the option ``USE_SABI`` is specified, the
|
|
preprocessor definition ``Py_LIMITED_API`` will be specified, as ``PRIVATE``,
|
|
for the target ``<name>`` with the value computed from ``<version>`` argument.
|
|
The expected format for ``<version>`` is ``major[.minor]``, where each
|
|
component is a numeric value. If ``minor`` component is specified, the
|
|
version should be, at least, ``3.2`` which is the version where the
|
|
`Stable Application Binary Interface <https://docs.python.org/3/c-api/stable.html>`_
|
|
was introduced. Specifying only major version ``3`` is equivalent to ``3.2``.
|
|
|
|
When option ``WITH_SOABI`` is also specified, the module suffix will include
|
|
the ``Python3_SOSABI`` value, if any.
|
|
|
|
.. versionadded:: 3.30
|
|
For ``MODULE`` type, the :prop_tgt:`DEBUG_POSTFIX` target property is
|
|
initialized with the value of ``Python3_DEBUG_POSTFIX`` variable if defined.
|
|
#]=======================================================================]
|
|
|
|
|
|
set (_PYTHON_PREFIX Python3)
|
|
|
|
set (_Python3_REQUIRED_VERSION_MAJOR 3)
|
|
|
|
include (${CMAKE_CURRENT_LIST_DIR}/FindPython/Support.cmake)
|
|
|
|
if (COMMAND __Python3_add_library)
|
|
macro (Python3_add_library)
|
|
__Python3_add_library (Python3 ${ARGV})
|
|
endmacro()
|
|
endif()
|
|
|
|
unset (_PYTHON_PREFIX)
|