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.. _f2py-distutils:
=============================
Using via `numpy.distutils`
=============================
.. currentmodule:: numpy.distutils.core
:mod:`numpy.distutils` is part of NumPy, and extends the standard Python
``distutils`` module to deal with Fortran sources and F2PY signature files, e.g.
compile Fortran sources, call F2PY to construct extension modules, etc.
.. topic:: Example
Consider the following ``setup_file.py`` for the ``fib`` and ``scalar``
examples from :ref:`f2py-getting-started` section:
.. literalinclude:: ./../code/setup_example.py
:language: python
Running
.. code-block:: bash
python setup_example.py build
will build two extension modules ``scalar`` and ``fib2`` to the
build directory.
Extensions to ``distutils``
===========================
:mod:`numpy.distutils` extends ``distutils`` with the following features:
* :class:`Extension` class argument ``sources`` may contain Fortran source
files. In addition, the list ``sources`` may contain at most one
F2PY signature file, and in this case, the name of an Extension module must
match with the ``<modulename>`` used in signature file. It is
assumed that an F2PY signature file contains exactly one ``python
module`` block.
If ``sources`` do not contain a signature file, then F2PY is used to scan
Fortran source files to construct wrappers to the Fortran codes.
Additional options to the F2PY executable can be given using the
:class:`Extension` class argument ``f2py_options``.
* The following new ``distutils`` commands are defined:
``build_src``
to construct Fortran wrapper extension modules, among many other things.
``config_fc``
to change Fortran compiler options.
Additionally, the ``build_ext`` and ``build_clib`` commands are also enhanced
to support Fortran sources.
Run
.. code-block:: bash
python <setup.py file> config_fc build_src build_ext --help
to see available options for these commands.
* When building Python packages containing Fortran sources, one
can choose different Fortran compilers by using the ``build_ext``
command option ``--fcompiler=<Vendor>``. Here ``<Vendor>`` can be one of the
following names (on ``linux`` systems)::
absoft compaq fujitsu g95 gnu gnu95 intel intele intelem lahey nag nagfor nv pathf95 pg vast
See ``numpy_distutils/fcompiler.py`` for an up-to-date list of
supported compilers for different platforms, or run
.. code-block:: bash
python -m numpy.f2py -c --help-fcompiler
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