The WinAVR/avr-libc library appears to be compiled with -mcall-prologues. It adds a fixed size overhead if the helper functions are pulled in, which may increase code side of small projects where the profit from prolog/epilog reduction is too small.
OTOH I've got a code reduction from 3424 to 3196 bytes going from 4.1.2 to 4.3.0, using the mentioned flags. _______________________________________________ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list