https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68612
--- Comment #5 from joseph at codesourcery dot com <joseph at codesourcery dot com> --- I'd consider this a reasonable extension (not suitable for adding while trunk is in bug-fixing mode, of course) for default (non-pedantic) mode, similar to the extension to use C++-like rules for arrays of qualified type. Similar to that, it requires a lot of care to make sure it doesn't cause valid code to be rejected, as well as thorough testcases. (To be clear, the C++ rule is not symmetric between const and other qualifiers; it allows adding arbitrary qualifiers in certain places if const is present at all levels of indirection beyond those where any qualifiers are added. For this purpose, in C, _Atomic should not be considered a qualifier, and you'd need to think about how address space qualifiers are involved.)
