http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56533
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> 2013-03-05
12:38:51 UTC ---
+ /usr/bin/avr-gcc -mmcu=atmega328p -Os -flto -fwhole-program realmain.o
main.a
please provide the console output produced when adding -v to the above
commandline. I suspect that you fall foul of using -fwhole-program without
making the whole program visible to gcc via -flto by means of not using
a compiler that can handle LTO of static archives.
In general, don't use -fwhole-program with -flto, -flto is smart enough
to discover things more intelligently.
