https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83294
--- Comment #4 from Rich Felker <bugdal at aerifal dot cx> --- Further examination shows that this GCC feature (-funsigned-bitfields) is actually buggy/non-conforming. It changes the default signedness of all integer types in bitfields, not just plain int. This behavior seems consistent with the documentation, but not with the C standard, which only permits it for plain int; see C11 6.7.2 ΒΆ5: "Each of the comma-separated multisets designates the same type, except that for bit-fields, it is implementation-defined whether the specifier int designates the same type as signed int or the same type as unsigned int." Should this be opened as a separate bug?
