blah, blah ..../librxtxSerial.jnilib: no matching architecture in universal wrapper thrown while loading .....blah, blah
The problem could be 32/64 -bit silliness.
Look at this:
I am also having problems with librxtx-java on PPC linux and just don't use it. Maybe I'm just an old Moomintroll, but I think it is totally nuts to work with serial ports in java. This should be handled at a lower level by the operating system.
btw, if you don't want to use Arduino IDE, you can build everything from the command line using scons and SConstruct. (Look at the Arch Linux wiki on scons and arduino to see details.)