[PATCH 6/6] aix: implement TLS relocation for gas and ld

[CHIGOT, CLEMENT]

>> --- a/ld/emultempl/aix.em
>> +++ b/ld/emultempl/aix.em
>> @@ -969,6 +969,26 @@ gld${EMULATION_NAME}_before_allocation (void)
>>          sec->flags |= SEC_KEEP;
>>        }
>>  
>> +  /* Make sure .tdata is removed if empty, even with -r flag.
>> +     .tdata is always being generated because its size is needed
>> +     to cumpute .data address.  */
>> +  if (bfd_link_relocatable (&link_info))
>> +    {
>> +      asection *sec;
>> +
>> +      sec = bfd_get_section_by_name (link_info.output_bfd,
>> +                                  ".tdata");
>
> Needs a "sec != NULL" test here, and I think even with that this code
> won't work as you expect.  I might be wrong though, did you test to
> see whether a non-empty .tdata is kept?
> 
>> +      if (sec->rawsize == 0
>> +       && (sec->flags & SEC_KEEP) == 0
>> +       && !bfd_section_removed_from_list (link_info.output_bfd,
>> +                                          sec))
>> +     {
>> +       sec->flags |= SEC_EXCLUDE;
>> +       bfd_section_list_remove (link_info.output_bfd, sec);
>> +       link_info.output_bfd->section_count--;
>> +     }
>> +    }
>> +
>>    before_allocation_default ();
>>  }

Indeed, a non-empty .tdata is being removed too. 
My goal here is to avoid having a ".tdata" section in every files generated
with "-r". The reason why it keeps appearing is because I'm using .tdata size 
to compute "dot" in aix.sc. 
I'm sure it can be fixed directly inside aix.sc but I didn't find how, as I need
to place .tdata before .data and have everything align correctly...  
Otherwise, any ideas how to detect when .tdata is non-empty there ? 

Thanks, 
Clément