https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53103
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |FIXED Target Milestone|--- |4.8.0 --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- unsigned_type_for/signed_type_for was actally fixed on the trunk, a month before this bug report was filed, by r0-115650-g7ee6fd6836b487 . I tested: ``` __int24 xi; __int24 addit () { xi += 0x54321L; } ``` On AVR and it has worked at least since GCC 5 when __int24 was added.