Package: libc6-dev
Version: 2.10.2-2
Type punning between pointers to struct sockaddr, struct sockaddr_storage
and sockaddr_in(6) is explicitly required by the sockets interface. For
example, RFC 3493 Section 3.8 gives the following example:
if (bind(s, (struct sockaddr *) &sin6, sizeof(sin6)) == -1)
Unfortunately, gcc-4.4 with -fstrict-aliasing=2 complains on this kind
of code. This may potentially break in code optimised with -O2 or greater
(it probably doesn't, though, since most of the code that triggers this
warning doesn't actually violate the C99 aliasing restrictions).
I suggest that the definitions of struct sockaddr and struct sockaddr_storage
should be equipped with
__attribute__ ((may_alias))
Juliusz
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