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Retry powerpc gold stub grouping when groups prove too large

Markus Trippelsdorf markus@trippelsdorf.de
Thu Dec 4 09:12:00 GMT 2014 
On 2014.11.26 at 13:28 +1030, Alan Modra wrote:
> 
> 	* powerpc.cc (struct Stub_table_owner): New.
> 	(Powerpc_relobj): Rename stub_table_ to stub_table_index_, an
> 	unsigned int vector.  Update all references.
> 	(powerpc_relobj::set_stub_table): Take an unsigned int param
> 	rather than a Stub_table.  Update callers.
> 	(Powerpc_relobj::clear_stub_table): New function.
> 	(Target_powerpc): Add relax_failed_, relax_fail_count_ and
> 	stub_group_size_ vars.
> 	(Target_powerpc::new_stub_table): Delete.
> 	(max_branch_delta): New function, extracted from..
> 	(Target_powerpc::Relocate::relocate): ..here..
> 	(Target_powerpc::Branch_info::make_stub): ..and here.  Return
> 	status on whether stub created successfully.
> 	(Stub_control::Stub_control): Add "no_size_errors" param.  Move
> 	default sizing to..
> 	(Target_powerpc::do_relax): ..here.  Init stub_group_size_ and
> 	reduce on relax failure.
> 	(Target_powerpc::group_sections): Add "no_size_errors" param.
> 	Use stub_group_size_.  Set up group info in a temp vector,
> 	before building Stub_table vector.  Account for input sections
> 	possibly already converted to relaxed sections.
> 	(Stub_table::init): Delete.  Merge into..
> 	(Stub_table::Stub_table): ..here.
> 	(Stub_table::can_reach_stub): New function.
> 	(Stub_table::add_plt_call_entry): Add "from" parameter and
> 	return true iff stub could be reached.
> 	(Stub_table::add_long_branch_entry): Similarly.  Add "r_type"
> 	param too.
> 	(Stub_table::clear_stubs): Add "all" param.

When building the Linux kernel one gets many messages like:

ld: stub group size is too large; retrying with 22020096
ld: stub group size is too large; retrying with 16515072

Do they really convey any useful information to the user? 
They look more like leftover debugging messages to me.

-- 
Markus
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