WinAVR build

[moved from email] I noticed that the file "serial.c" is missing the include for <avr/signal.h>. Once I add this, the source compiles cleanly…

WinAVR build

Thanks for the information. Are you using the latest WinAVR build?  I think with older builds the include is required, but with newer builds it is not.  I have just tried a clean build and everything seems to build with no errors or warnings. Regards.