[Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622

["bernd.edlinger at hotmail dot de" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79671

--- Comment #49 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
While I think that adding explicit copy/assignment constructors
as in comment #43 should work and looks like the most portable
solution for boost, I am unsure if may_alias shouldn't really
work different.

I thought of another use of may_alias that also applies to C:
Isn't the plan to add may_alias to the struct sockaddr_storage ?

And wouldn't you then expect to add a sockaddr_storage
to a structure like:

struct A
{
   struct sockaddr_storage s;
};

does'nt that mean that

A a, b;

a.s = b.s;

will also ignore the may_alias ?