Hi
You are right
It is possible to have such errors.
I've tried to build all QextSerialPort classes to external dll or .lib and use them in next projects as nessesary
BUT!
Because of possible erorrs as from feedback here and from my personal exp. using classes DIRECTLY in you project will minimize possible errors to zero and 'll help you to understand how such serial port driver works
So unless thie you have conditional compilation directives in QextSerialPort classes ( such as #ifdef etc.) you should have no problems with crossplatform use
You can delete by hand all POSIX includes ( that are for LINUX) as I made in my project