This is ns-3-allinone.
If you have downloaded this in tarball release format, this directory
contains some released ns-3 version, along with 3rd party components
necessary to support all optional ns-3 features, such as Python
bindings and Network Simulation Cradle. In this case, just run the
script build.py; all the components, plus ns-3 itself, will thus be
built.
If, on the other hand, you have obtained this by cloning the mercurial
repository, this directory only contains a few python scripts:
download.py:
This script will take care of downloading all necessary
components, including pybindgen and NSC, along with cloning an
ns-3 repository. By default, the main development ns-3 branch,
ns-3-dev, will be cloned, but it can be overridden via the -n
command line option. For example,
./download.py -n craigdo/ns-3-tap
will clone the repository http://code.nsnam.org/craigdo/ns-3-tap
into the allinone directory.
By default, regression traces will not be downloaded. You can
override this using the -r command line option. For example,
./download.py -n craigdo/ns-3-tap -r craigdo/ns-3-tap-ref-traces
will clone the repository http://code.nsnam.org/craigdo/ns-3-tap
into the allinone directory and also clone the reference traces
from the http://code.nsnam.org/craigdo/ns-3-tap-ref-traces repo.
Note that regression traces are only available for ns-3 releases
up to version ns-3.9.
build.py:
This script will get all external components that need to be
built, and then will build ns-3 using the downloaded components.