Hi,
-Wl,--undefined=signature This will keep it in flash and not let the linker strip its value. Also when preparing your .hex file for flashing you may need to explicitly tell the sections you want. avr-objcopy -j .text -j .data -j .my_signature -O ihex prog.elf prog.hex
works perfect! Thanks! Maybe an additional question as I am using different controllers. Is there any option to tell the linker something like -Wl,--section-start=.my_signature=FLASH_END-0x50 This can be done easily in the linker script, but I did not want to take a copy of the whole avr-libc/binutils installation to add a new section in each of the .x files. Some idea how I can "ask" for the last possible flash address of the controller? Maybe by compiling some empty prog, picking a symbol from elf, place it in the Makefile-variable and go for final link? Strange... :) Sounds possible... I will also take a look... Thanks Klaus
