Optionally, use ``NS3_HINT`` to tell cmake where ns3 is installed on
your disk.
-.. code-block:: shell
+.. code-block:: console
- cmake . -Denable_ns3=ON -DNS3_HINT=/opt/ns3 # or change the path if needed
+ $ cmake . -Denable_ns3=ON -DNS3_HINT=/opt/ns3 # or change the path if needed
By the end of the configuration, cmake reports whether ns-3 was found,
and this information is also available in ``include/simgrid/config.h``
build directory). It will run all SimGrid tests that are related to the ns-3
integration. If no test is run at all, you probably forgot to enable ns-3 in cmake.
-.. code-block:: shell
+.. code-block:: console
- ctest -R ns3
+ $ ctest -R ns3
Troubleshooting
---------------
comments on top of this file. Conversely, if something goes wrong with an old
version of either SimGrid or ns-3, try upgrading everything.
+Note that there is a known bug with version 3.31 of ns3, when it's built with
+MPI support, like it is with the package libns3-dev in Debian 11 « Bullseye ».
+A simple workaround is to edit the file
+``/usr/include/ns3.31/ns3/point-to-point-helper.h`` to remove the ``#ifdef NS3_MPI``
+include guard. This can be achieved with the following command (as root):
+
+.. code-block:: console
+
+ # sed -i '/^#ifdef NS3_MPI/,+2s,^#,//&,' /usr/include/ns3.31/ns3/point-to-point-helper.h
+
.. _ns3_use:
Using ns-3 from SimGrid
<options_model_select>` configuration option to `ns-3` as follows. The other
options can be used as usual.
-.. code-block:: shell
+.. code-block:: console
- ./network-ns3 --cfg=network/model:ns-3 (other parameters)
+ $ ./network-ns3 --cfg=network/model:ns-3 (other parameters)
Many other files from the ``examples/platform`` directory are usable with the
ns-3 model, such as `examples/platforms/dogbone.xml <https://framagit.org/simgrid/simgrid/tree/master/examples/platforms/dogbone.xml>`_.
