get rid weak symbols code

[Jeff Law]

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On 04/01/11 09:08, Jiri Olsa wrote:
> hi,
> 
> I'd like to ask if there's a way to compile/link out the weak
> symbol's code that has been overloaded.
> 
> Having following objects:
> 
> 
> 1st object:
> ---
> int __attribute__((weak)) krava(void)
> {
>         printf("weak krava\n");
>         return 0;
> }
> 
> int main(int argc, char **argv)
> {
>         krava();
>         return 0;
> }
> ---
> 
> 
> 2nd object:
> ---
> int krava(void)
> {
>         printf("krava\n");
>         return 0;
> }
> ---
> 
> 
> ..the final executable will call krava function from 2nd object file,
> so far so good.. :)
> 
> However, the function krava from the 1st object still stays in the
> final executable with no symbol assigned.. as a dead code I'd say.
> 
> I guess it's probably not easy to get rid of that code during the
> linking time.. and I haven't found any way to do that.
> Is there any? Or what did I miss.. :)
You could try putting each function into its own section, then asking
the linker to garbage collect sections.

jeff
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