I try to compile v7.2.0 but get error messages in exception.c

Error   1   invalid operands (*UND* and *UND* sections) for `<<' freertosportablegccavr32_uc3exception.S   290 1

Does anyone know what it means?

The most up to date AVR32 port can be found in the Atmel Software Framework.  Go to http://asf.atmel.com to download. Regards.