https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91297
Richard Earnshaw <rearnsha at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |WAITING Last reconfirmed| |2019-07-30 Ever confirmed|0 |1 --- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> --- Check your core documentation, but I think the M0 does not support unaligned accesses, so your code (the type cast) is not valid for this architecture.