From Tekkotsu Wiki

1. Install the Eclipse C/C++ Developer package. You could do "apt-get install eclipse", but to avoid getting a stale version, it's better to directly install the latest release (Helios in 2010).

cd /usr/share
sudo -s
wget http://mirror.cc.vt.edu/pub/eclipse/technology/epp/downloads/release/helios/R/eclipse-cpp-helios-linux-gtk.tar.gz
tar -xvzf eclipse-cpp-helios-linux-gtk.tar.gz
ln -s /usr/share/eclipse/eclipse /usr/local/bin 

2. Set Eclipse to recognize fsm files as C++ source:

• Type "eclipse &" to start Eclipse.
• Go to Window > Preferences
• Open the C/C++ folder, then click on File Types
• Click on New, then specify *.fsm as the pattern, and set the type to C++ Source File.
• Click OK twice.

3. Set Eclipse to indent lines by 2 spaces:

• Go to Windows > Preferences
• Open the C++ folder, then the Editor folder
• Select Typing, then click on the "code style preference page" link
• Click on Edit and change the name of the profile, e.g., to "K&R [2 spaces]"
• Set the Tab Size to 2 characters
• Click OK twice.

4. Set up your project directory as an Eclipse project.

• Go to File > New > Project
• Select C/C++ project
• Specify the path to the project files as ~/project