Hi Jiri,
Thank you for you reply.
I solved this problem by deleting the debug folder and rebuild the project,i checked the powerpc-eabivle-gcc.exe and i am sure that this file existed when this fault appeared.
I don't know why this fault appeared inexplicable.
I built successfully many times and this fault just appeared suddenly.
It make me so confused.
Hope to get your help if this fault appears again.
Regards