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Manual.md: add a Python packages section.

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Juan RP 2014-07-04 07:37:05 +02:00
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@ -644,6 +644,40 @@ If a development package provides a `pkg-config` file, you should verify
what dependencies the package needs for dynamic or static linking, and add
the appropiate `development` packages as dependencies.
### Python packages
Python packages should be built with the `python-module` build style, if possible. This sets
some environment variables required to allow cross compilation. Support to allow building
a python module for multiple versions from a single template is also possible.
To allow cross compilation, the `python-devel` package (for python 2.7) must be added
to `hostmakedepends` and `makedepends`. If any other python version is also supported,
for example python3.4, those must also be added as host and target build dependencies.
The following variables may influence how the python packages are built and configured
at post-install time:
- `python_versions`: this variable expects the python versions supported by the module.
By default it's always set to `2.7`. If a package for another python version is wanted
you can set all acceptable versions, i.e `python_versions="2.7 3.4"` will build a package
for `python (2.7)` and `python3.4`.
- `pycompile_version`: this variable expects the python version that is used to
byte-compile the python code (it generates the `.py[co]` files at post-install time).
By default it's set to `2.7` for `python 2.x` packages.
- `pycompile_module`: this variable expects the python modules that should be `byte-compiled`
at post-install time. Python modules are those that are installed into the `site-packages`
prefix: `usr/lib/pythonX.X/site-packages`. Multiple python modules may be specified separated
by blanks, i.e `pycompile_module="foo blah"`.
- `pycompile_dirs`: this variable expects the python directories that should be `byte-compiled`
recusively by the target python version. This differs from `pycompile_module` in that any
path may be specified, i.e `pycompile_dirs="usr/share/foo"`.
> NOTE: it's expected that additional subpkgs must be generated to allow packaging for multiple
python versions.
### Notes
- Make sure that all software is configured to use the `/usr` prefix.