https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83452
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #42903|0 |1
is obsolete| |
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 42915
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42915&action=edit
updated patch
Note this hack isn't sustainable as with -ffat-lto-objects _any_ symbol defined
by a TU will become a global weak UNDEF.
What might "work" is to change the name of all such UNDEFs to the same gnu_lto_
one.
So, can you, with
> cat t.c
extern int d;
int a[8][10] = { [2][5] = 4 }, c;
int
main ()
{
short b;
int i, d;
for (b = 4; b >= 0; b--)
for (c = 0; c <= 6; c++)
a[c + 1][b + 2] = a[c][b + 1] + d;
for (i = 0; i < 8; i++)
for (d = 0; d < 10; d++)
if (a[i][d] != (i == 3 && d == 6) * 4)
__builtin_abort ();
return 0;
}
> cat t2.c
int d = 1;
> ./xgcc -B. t.c t2.c -g -flto -ffat-lto-objects
verify the attached patch? That should end up with multiple UNDEF WEAK HIDDEN
globals of the same name (gnu_lto_v1). Then your "stub" would work.
