I did find this docuented in adkum.pdf.
If you wan to use your own favorite debugger, do this:
1. Find <Tecplot_installation_bin_dir>/tecplot.sh
file and edit the DEBUGCMD variable and introduce your own debugger.
In my case, I use totalview.
2. If you want to copy tecplot.sh and create your own version (so that the
original is not modified), then you need to do additional step to get
tec360 to work with your debugger.
So, the steps are:
2-a) Copy the tecplot.sh file, modify it to say "your_own_tecplot.sh"
2-b) modify the "tec360" link to point to "your_own_tecplot.sh"
(Do "man ln" to find out how to do this: Basically, do
ln -s <full_path_to_your_own_tecplot> tec360
This will create a soft link to tec360)
2-c) run tec360 as before and it should start with your debugger
3. If you use "-loadaddon" command or any other command to load your
add-on, then these will be ignored. You have to manually add your
add-on after starting the debug version.