> Could you provide a complete, small compilable example that produces the > warning? -------------------- source begin --------------------- class c1 { virtual void x() { } }; c1 zzz; int main(int argc, char **argv) { return 0; } -------------------- source end ----------------------- This is a full source code which prodices the warning message: $> avr-g++ x.cpp x.cpp:2: warning: alignment of ‘c1::_ZTV2c1’ is greater than maximum object file alignment. Using 1 The x86 version of gcc does not send any messages. Regards K. Gy.