Thanks, now it compiles with no problem. But it doesn't mine: just shows I have 0 MHash/s.

Stracing this process doesn't help. I'm using 32-bit Ubuntu 10.04 (yes, I should have installed 64bit-version, but I did not and I'm a bit lazy now), my CPU is Intel(R) Core(TM)2 Duo CPU     T9550  @ 2.66GHz