2005-07-25 H.J. Lu <hongjiu.lu@intel.com>

	* elf-bfd.h (elf_backend_data): Add common_definition,
	common_section_index, common_section, and merge_symbol.
	(_bfd_elf_common_definition): New.
	(_bfd_elf_common_section_index): New.
	(_bfd_elf_common_section): New.

	* elf.c (elf_fake_sections): Don't clear sh_flags.

	* elflink.c (_bfd_elf_merge_symbol): Call backend merge_symbol
	if it is available.
	(is_global_data_symbol_definition): Call backend
	common_definition instead of checking SHN_COMMON.
	(elf_link_add_object_symbols): Likewise.
	(elf_link_output_extsym): Call backend common_section_index
	for common section index.
	(_bfd_elf_common_definition): New.
	(_bfd_elf_common_section_index): New.
	(_bfd_elf_common_section): New.

	* elfxx-target.h (elf_backend_common_definition): New.
	(elf_backend_common_section_index): New.
	(elf_backend_common_section): New.
	(elf_backend_merge_symbol): New.
	(elfNN_bed): Initialize common_definition, common_section_index,
	common_section, and merge_symbol.

	* section.c (BFD_FAKE_SECTION): New.
	(STD_SECTION): Use it.
	* bfd-in2.h: Regenerated.