I suppose I need to mention some library to satisfy these unresolved references: str.o(.text+0x168c):str.cpp: undefined reference to `operator new[](unsigned)' str.o(.text+0x16d3):str.cpp: undefined reference to `operator delete(void*)' -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/