I talked to my advisor and found out that the current setup of the JPEG2000 library under v3p might be incongrous with the specifications in the code's license.
In a nutshell, the developers of Earth Resource Mapping do not allow the redistribution of the code. So in order to preemt future problems (other than building under various platforms :-) ), I have removed the sources but kept the CMakeLists.txt (which are not present in the original sources).
So if a user actually procures the sources from the ERMapper website, he or she can just add them to v3p. This seems inconvenient, but the other alternative would be to formally request the right to redistribute the code through vxl.
I apologize for any incoveniences I or the setup of this lib have caused.