Allow linker script on executable and hidden symbol

[H. J. Lu]

On Thu, May 05, 2005 at 03:06:42PM -0700, James E Wilson wrote:
> On Thu, 2005-05-05 at 12:20, H. J. Lu wrote:
> > Here is the updated patch.
> 
> The executable/version script part of this looks much better to me now. 
> You have docs, and a linker consistency check.
> 
> However, this patch still includes the stuff for forcibly exporting
> hidden variables.  Alan Modra objected to that, and pointed out that we
> can get incorrect code in this case.  I've never used hidden variables,
> and know little about how they work, but I do know that I should not be
> overruling Alan when it comes to binutils decisions like this.  Maybe
> you need to discuss this with him a bit more.
> 
> I think I see the point of the change.  -Bsymbolic affects all
> variables, and you want a way to change the binding of individual
> variables.  So effectively this is the same problem as the other part of
> the patch.  Applying a linker script to an executable allows you to
> changing binding of individual variables, whereas --export-dynamic
> affects all of them.
> 
> However, that still leaves the question of whether we can get incorrect
> code, which doesn't seem to have been resolved.

My view is it generats the same code as -Bsymbolic. If we allow
-Bsymbolic to generate "incorrect" code on all symbols, why not do it
selectively?


H.J.