[LLVMdev] gold plugin use

[John Criswell]

Swarup Kumar Sahoo wrote:
>>> Yes, ar and nm actually take -plugin option and if I pass this option, then I don't get these errors. But, llvm-gcc doesn't automatically pass this option to ar.
>>>       
>> You probably just need to copy the gold plugin to
>> $PREFIX/lib/bfd-plugins. Let me know if that works. If not I will
>> check if there is a bug in the plugin search in binutils.
>>     
>
> There is no problem in plugin search. If I give -plugin \path\to\plugin option to ar and nm, they are working fine. But, llvm-gcc doesn't pass this option to ar and nm automatically, so when I compile apache, I get those errors. When I wrote a small script to run ar with -plugin option for compiling apache, then I don't get these errors. 
>   
I don't believe that llvm-gcc is used to execute the ar command.  Having 
read everyone's input, I believe the problem stems from the fact that 
your llvmGold.so is not in a directory in which ar searches for plugins 
by default, *and* the Makefiles aren't passing the --plugin option to 
ar, so ar never loads llvmGold.so and cannot link LLVM bitcode files.

The solution is to either convince the software's build system to run ar 
with the --plugin option (you can set the AR environment variable before 
running configure to do this) or place llvmGold.so in the bfd-plugins 
directory as Rafael suggests (which will cause ar to load it whenever it 
is run).

-- John T.

> BTW, there is no directory called bfd_plugins inside lib. I think, there is some mistake in the documentation. I just copied the plugin to /lib directory and it works fine.
>
> -Swarup.
>
>   
>> Cheers,
>> -- 
>> Rafael Ávila de Espíndola
>>     
>
> *************************************
> Swarup Kumar Sahoo
> Thomas M. Siebel Center for Computer Science
> University of Illinois at Urbana Champaign
> 201 N Goodwin Avenue
> Urbana, IL-61801
> Phone - 614 264 9574
>
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