https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118329
--- Comment #4 from Georg-Johann Lay <gjl at gcc dot gnu.org> --- avr-modes.def is the only backend that's using FRACTIONAL_INT_MODE. So will INT_N replace it? Augment it? And as far as I understand, INT_N defines __intN. What about avr.cc's built-in types __int24 and __uint24? INT_N yields both?
