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z3/README.md

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# Z3
Z3 is a theorem prover from Microsoft Research.
Z3 is licensed under the MIT license.
Z3 can be built using Visual Studio Command Prompt and make/g++.
## Building Z3 on Windows using Visual Studio Command Prompt
32-bit builds, start with:
```bash
python scripts/mk_make.py
```
or instead, for a 64-bit build:
```bash
python scripts/mk_make.py -x
```
then:
```bash
cd build
nmake
```
## Building Z3 using make and GCC/Clang
Execute:
```bash
python scripts/mk_make.py
cd build
make
sudo make install
```
Note by default ``gcc`` is used as the C++ compiler if it is available. If you
would prefer to use Clang change the ``mk_make.py`` line to
```bash
CXX=clang++ CC=clang python scripts/mk_make.py
```
Note that Clang < 3.7 does not support OpenMP.
By default, it will install z3 executable at ``PREFIX/bin``, libraries at
``PREFIX/lib``, and include files at ``PREFIX/include``, where ``PREFIX``
installation prefix if inferred by the ``mk_make.py`` script. It is usually
``/usr`` for most Linux distros, and ``/usr/local`` for FreeBSD and OSX. Use
the ``--prefix=`` command line option to change the install prefix. For example:
```bash
python scripts/mk_make.py --prefix=/home/leo
cd build
make
make install
```
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
```bash
sudo make uninstall
```
To clean Z3 you can delete the build directory and run the ``mk_make.py`` script again.
## Z3 bindings
Z3 has bindings for various programming languages.
### ``.NET``
These bindings are enabled by default on Windows and are enabled on other
platforms if [mono](http://www.mono-project.com/) is detected. On these
platforms the location of the C# compiler and gac utility need to be known. You
can set these as follows if they aren't detected automatically. For example:
```bash
CSC=/usr/bin/csc GACUTIL=/usr/bin/gacutil python scripts/mk_make.py
```
To disable building these bindings pass ``--nodotnet`` to ``mk_make.py``.
Note for very old versions of Mono (e.g. ``2.10``) you may need to set ``CSC``
to ``/usr/bin/dmcs``.
Note that when ``make install`` is executed on non-windows platforms the GAC
utility is used to install ``Microsoft.Z3.dll`` into the
[GAC](http://www.mono-project.com/docs/advanced/assemblies-and-the-gac/) as the
``Microsoft.Z3.Sharp`` package. During install a
[pkg-config](http://www.freedesktop.org/wiki/Software/pkg-config/) file
(``Microsoft.Z3.Sharp.pc``) is also installed which allows the
[MonoDevelop](http://www.monodevelop.com/) IDE to find the bindings. Running
``make uninstall`` will remove the dll from the GAC and the pkg-config file.
See [``examples/dotnet``](examples/dotnet) for examples.
### ``C``
These are always enabled.
See [``examples/c``](examples/c) for examples.
### ``C++``
These are always enabled.
See [``examples/c++``](examples/c++) for examples.
### ``Java``
Use the ``--java`` command line flag with ``mk_make.py`` to enable building these.
See [``examples/java``](examples/java) for examples.
### ``OCaml``
Use the ``--ml`` command line flag with ``mk_make.py`` to enable building these.
See [``examples/ml``](examples/ml) for examples.
### ``Python``
These bindings are always enabled.
See [``examples/python``](examples/python) for examples.