Hi John, thank you for the hint.
I replaced the __cxa_pure_virtual function in infra/pure.cxx by the following code
#include <cxxabi.h> extern "C" void __cxxabiv1::__cxa_pure_virtual (void) {CYG_FAIL("attempt to use a virtual function before object has been constructed");
for ( ; ; ); } It did not solve the problem. Regards, Uwe