Hello Peter, I have no good guess from your provided information. So, please post a complete log of 'make clean; make VERBOSE= test/lwip". Greets -- Christian Helmuth Genode Labs http://www.genode-labs.com/ · http://genode.org/ Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth