n f <yazhi_1@xxxxxxxxx> writes: > When I run my make command, i get this error: > main.o: undefined reference to '_impure_ptr' > > it has to do with a funtion that i send a char *msg to > and try to print through the serial port. > > Does anyone know what's going on? You need to show precisely what you are doing--what you are compiling and what commands you are running. Otherwise we are only guessing. (At least you did include the exact error messages--thanks for doing that.) Guessing, I would say that you are using newlib. I would say that your main function refers to stdout. But at this point my imagination fails me. Either you got error messages which you haven't told us about, or something weird is going on, since the newlib libc should define _impure_ptr. Ian
