http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49764
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-07-16 17:34:10 UTC --- I suppose I should be a bit more explicit - your bug report is no use to anyone. "arduino (IDE)" doesn't mean anything to GCC developers, and neither does gcc-avr-4.6.1-1, and noone here has the examples you're talking about You should either file a proper bug report following the instructions at the URL I provided, or report this to ArchLinux where it might mean something to someone Since you seem to be talking about ArchLinux packages and a version of GCC provided by ArchLinux, you should probably report it to them