You would like to use the Arduino Uno board with Mandriva but you are running into errors and problems installing it.
Download the latest code from the arduino website and extract the file somewhere.
Add your username to the dialout and uucp groups so you don’t get permissions errors.
install the avr-gcc package:
$ sudo urpmi avr-gcc
if everything works as it should then you should be able to select the port from the arduino IDE (Tools -> Serial Port -> /dev/ttyACM0)
You should then be able to communicate with the Arduino board by using one of the examples (ie Examples/Basic/Blink)