https://gcc.gnu.org/bugzilla/show_bug.cgi?id=41227
--- Comment #18 from Tobias Burnus <burnus at gcc dot gnu.org> ---
(In reply to Francois-Xavier Coudert from comment #14)
> (In reply to rguent...@suse.de from comment #13)
> > Does it need to inter-operate with
> > extern struct { struct { int i; } a; } a;
> No, I don't read anything in the standard that would allow this.
By your argument,
int i;
and
struct { int i; } a;
are interoperable. By this argument, one can also claim that it applies to
struct { struct { int i; } a; } a;
At least I fail to see a difference between the single and the nested struct.
Otherwise, I stand to what I wrote before: I think the standard does not demand
the interoperability.
There are surely programs out there which do assume for a scalar variable in a
common block that it interoperates with "int" and others which assume that it
interoperates with "struct { int i; }". Thus, one might decide that one wants
to support both versions with LTO. But one shouldn't do so by arguing with the
Fortran standard.
