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Recent changes to the build system mean that setting a custom

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``--prefix=`` is likely to disable installing the Python bindings so
the old instructions aren't helpful. Reword them and mention using
``DESTDIR``.
This commit is contained in:
Dan Liew 2015-12-12 10:22:56 +00:00
parent 08610ae243
commit f09fa3c87b
1 changed files with 24 additions and 2 deletions
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26
README.md
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@ -49,8 +49,30 @@ the ``--prefix=`` command line option to change the install prefix. For example:
make install
```
In this example, the Z3 Python bindings will be stored at ``/home/leo/lib/pythonX.Y/dist-packages``,
where X.Y corresponds to the python version in your system.
Note the above will typically disable the installation of the Python bindings
because the Python ``site-packages`` directory (e.g.
``/usr/lib/python3.5/site-packages/``) is not rooted in the install prefix and
installing outside of the install prefix is dangerous and misleading.
To avoid this issue you can use the ``DESTDIR`` makefile variable and leave the
install prefix as the default. The ``DESTDIR`` variable is prepended to the
install locations during ``make install`` and ``make uninstall`` and is intended
to allow ["staged installs"](https://www.gnu.org/prep/standards/html_node/DESTDIR.html).
Therefore it must always contain a trailing slash.
For example:
```bash
python scripts/mk_make.py
cd build
make
make install DESTDIR=/home/leo/
```
In this example, the Z3 Python bindings will be stored at
``/home/leo/lib/pythonX.Y/site-packages``
(``/home/leo/lib/pythonX.Y/dist-packages`` on Debian based Linux
distributions) where X.Y corresponds to the python version in your system.
To uninstall Z3, use