Hi. I downloading cygwin (full), installed and I configured DEV-CPP how are. I am wearing the Library GMP and compiling in GCC. Just that. I do not manage to compile, I receive the mistake: Undefined reference have `__imp___iob' I am using -lgmp in the LINKER. I searched in the google but did not find anything that solved. How can correct that? Deangelo -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/