Ángel González <keisial@xxxxxxxxx> writes: > On 12/02/12 06:41, Ian Lance Taylor wrote: >>> This syntax works fine in gcc 3.4 but seems to have disappeared in gcc4, >>> where it complains that the symbol is aliased to undefined symbol. >> I don't see any evidence that this actually worked in gcc 3.4. In 3.4 >> it would make Localfoo an alias for a symbol named literally >> "Foo.Foodata". it would not make Localfoo an alias for the Foodata >> field of the global variable Foo. I think gcc4 is kindly giving you an >> error for something that never actually worked. >> >> Ian > That's odd. Even if the compiler didn't check it, I would have expected a > linker error in such case. > Although I only tried to compile it, not to actually use it, maybe some > optimization was removing all the symbols altogether, making it look as > if it worked. I'll check tomorrow and report back. The linker tends to only complain if an undefined symbol is used. I don't know if that explains what you are seeing, but perhaps it does. Ian
