[Bug c/71255] Auto-annotate sockaddr related structs with may_alias

[fw at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71255

Florian Weimer <fw at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |fw at gcc dot gnu.org

--- Comment #3 from Florian Weimer <fw at gcc dot gnu.org> ---
I suggest adding a pragma which glibc can use in /usr/include/stdc-predef.h,
before any struct definitions.  This way, we can maintain the list of structs
inside glibc.  The pragma should have no visible effect until a struct (or
class) with that tag is defined.