https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94338
--- Comment #3 from joseph at codesourcery dot com <joseph at codesourcery dot com> --- It's a mistake to be referring to the C standard for the interpretation of alignment attributes. The C standard way of specifying alignment is _Alignas, not __attribute__, and if you write equivalent code using _Alignas you get an error "error: '_Alignas' specifiers cannot reduce alignment of 'A'", which corresponds to the constraint "The combined effect of all alignment specifiers in a declaration shall not specify an alignment that is less strict than the alignment that would otherwise be required for the type of the object or member being declared.".
