| expat | 1.1 | NO | `libexpat1-dev` | `expat` | `expat-devel` | YES | XML parsing |
| GTest | 1.5 | YES | `libgtest-dev`^ | `gtest` | `gtest-devel` | YES | Test suite |
| GTest | 1.5 | YES | `libgtest-dev`[1] | `gtest` | `gtest-devel` | YES | Test suite |
| Doxygen | any | NO | `doxygen` | `doxygen` | `doxygen` | YES | Documentation |
| Graphviz | any | NO | `graphviz` | `graphviz` | `graphviz` | YES | Documentation |
[^] On Debian/Ubuntu `libgtest-dev` only includes sources and headers. You must
[1] On Debian/Ubuntu `libgtest-dev` only includes sources and headers. You must
build the library binary manually. This can be done with the following command ```sudo apt-get install libgtest-dev && cd /usr/src/gtest && sudo cmake . && sudo make && sudo mv libg* /usr/lib/ ```
[2] libnorm-dev is needed if your zmq library was built with libnorm, and not needed otherwise