Hi
I have the same problem of Jack.
I followed the directions in Arduino Playground - Kdevelop
but when I try the script "Compile and upload Arduino" on the "Hello Word"-like template I get the same error from kdevelop:
Running external script: /usr/bin/make TARGET=main all upload
make: *** No rule to make target "all". Stop.
*** Exited with return code: 2 ***
[\code]
What Have I to do?