As E. Weddington wrote:
% grep HSM ~/src/avr-libc/include/avr/io*.h
/home/joerg/src/avr-libc/include/avr/iocan128.h:#define ADHSM 7
/home/joerg/src/avr-libc/include/avr/iom128.h:#define ADHSM 4
/home/joerg/src/avr-libc/include/avr/iom64.h:#define ADHSM 4
/home/joerg/src/avr-libc/include/avr/iom8.h:#define ADHSM 4
/home/joerg/src/avr-libc/include/avr/iom8535.h:#define ADHSM 4
Probably, iom16.h should also be done the same way, i.e. as a
commented out, so we don't get another bug report filed for it. ;-)
Would you mind filling out a bug report so we don't forget? ;-)
Done. (I mistakenly titled the bit ADCHSM there, brain fault.)