On Ubuntu it gives this error:
/usr/lib/gcc/avr/4.3.5/../../../avr/include/stdlib.h:111: fout: expected unqualified-id before 'int'
/usr/lib/gcc/avr/4.3.5/../../../avr/include/stdlib.h:111: fout: expected `)' before 'int'
/usr/lib/gcc/avr/4.3.5/../../../avr/include/stdlib.h:111: fout: expected `)' before 'int'