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11.5 Python

Automake provides support for Python compilation with the `PYTHON' primary.

Any files listed in a `_PYTHON' variable will be byte-compiled with py-compile at install time. py-compile actually creates both standard (`.pyc') and byte-compiled (`.pyo') versions of the source files. Note that because byte-compilation occurs at install time, any files listed in `noinst_PYTHON' will not be compiled. Python source files are included in the distribution by default.

Automake ships with an Autoconf macro called AM_PATH_PYTHON which will determine some Python-related directory variables (see below). If you have called AM_PATH_PYTHON from `configure.in', then you may use the following variables to list you Python source files in your variables: `python_PYTHON', `pkgpython_PYTHON', `pyexecdir_PYTHON', `pkgpyexecdir_PYTHON', depending where you want your files installed.

AM_PATH_PYTHON takes a single optional argument. This argument, if present, is the minimum version of Python which can be used for this package. If the version of Python found on the system is older than the required version, then AM_PATH_PYTHON will cause an error.

AM_PATH_PYTHON creates several output variables based on the Python installation found during configuration.

PYTHON
The name of the Python executable.

PYTHON_VERSION
The Python version number, in the form major.minor (e.g. `1.5'). This is currently the value of sys.version[:3].

PYTHON_PREFIX
The string $prefix. This term may be used in future work which needs the contents of Python's sys.prefix, but general consensus is to always use the value from configure.

PYTHON_EXEC_PREFIX
The string $exec_prefix. This term may be used in future work which needs the contents of Python's sys.exec_prefix, but general consensus is to always use the value from configure.

PYTHON_PLATFORM
The canonical name used by Python to describe the operating system, as given by sys.platform. This value is sometimes needed when building Python extensions.

pythondir
The directory name for the `site-packages' subdirectory of the standard Python install tree.

pkgpythondir
This is is the directory under pythondir which is named after the package. That is, it is `$(pythondir)/$(PACKAGE)'. It is provided as a convenience.

pyexecdir
This is the directory where Python extension modules (shared libraries) should be installed.

pkgpyexecdir
This is a convenience variable which is defined as `$(pyexecdir)/$(PACKAGE)'.


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