Hello Gregor, Am Sat, Mar 20, 2021 at 11:33:48AM +0100 schrieb Gregor Riepl: ... > Please ensure that this bootloader does not exceed 512 bytes when building the > package. It's likely that the increase in size was caused by a recently > updated > avr-gcc. I don't know if there are any compiler options or patches to reduce > the size to less than 512 bytes again. As a workaround, it may be possible to > set the start address to 0x7c00 (from 0x7e00) and change the sizes and fuse > bits in boards.txt to accommodate the larger bootloader.
you hit some more issue we currently have with these files. A lot of them we can't currently rebuild at all and due this we can't ship them. We have written some notes about the known problems to /usr/share/doc/arduino-core-avr/README.Debian and it seems this should get extended about this new issue. So far I know upstream is aware about the underlying problem that all build targets needs to get adjusted to current avr-gcc versions, if I remember right there is some issue about this in on GitHub within the Git tree. The Debian version of avr-gcc is lacking maintenance regarding newer versions. Due this I wont spend time on potential bug fixing, it's more efficient to pick the original .hex file from the Git tree of arduino-core-avr. Without the help from Arduino devs or some more experienced users I see no fixing of the reported problem in the near future. Sorry about this probably not satisfying answer. Regards Carsten
