+#ifndef elf_backend_got_header_size
+#define elf_backend_got_header_size 0
+#endif
+#ifndef elf_backend_plt_header_size
+#define elf_backend_plt_header_size 0
+#endif
+#ifndef elf_backend_post_process_headers
+#define elf_backend_post_process_headers NULL
+#endif
+#ifndef elf_backend_print_symbol_all
+#define elf_backend_print_symbol_all NULL
+#endif
+#ifndef elf_backend_output_arch_syms
+#define elf_backend_output_arch_syms NULL
+#endif
+#ifndef elf_backend_copy_indirect_symbol
+#define elf_backend_copy_indirect_symbol _bfd_elf_link_hash_copy_indirect
+#endif
+#ifndef elf_backend_hide_symbol
+#define elf_backend_hide_symbol _bfd_elf_link_hash_hide_symbol
+#endif
+#ifndef elf_backend_emit_relocs
+#define elf_backend_emit_relocs NULL
+#endif
+#ifndef elf_backend_count_relocs
+#define elf_backend_count_relocs NULL
+#endif
+#ifndef elf_backend_grok_prstatus
+#define elf_backend_grok_prstatus NULL
+#endif
+#ifndef elf_backend_grok_psinfo
+#define elf_backend_grok_psinfo NULL
+#endif
+#ifndef elf_backend_sprintf_vma
+#define elf_backend_sprintf_vma _bfd_elf_sprintf_vma
+#endif
+#ifndef elf_backend_fprintf_vma
+#define elf_backend_fprintf_vma _bfd_elf_fprintf_vma
+#endif
+#ifndef elf_backend_reloc_type_class
+#define elf_backend_reloc_type_class _bfd_elf_reloc_type_class
+#endif
+#ifndef elf_backend_discard_info
+#define elf_backend_discard_info NULL
+#endif
+#ifndef elf_backend_ignore_discarded_relocs
+#define elf_backend_ignore_discarded_relocs NULL
+#endif
+#ifndef elf_backend_write_section
+#define elf_backend_write_section NULL
+#endif
+#ifndef elf_backend_mips_irix_compat
+#define elf_backend_mips_irix_compat NULL
+#endif
+#ifndef elf_backend_mips_rtype_to_howto
+#define elf_backend_mips_rtype_to_howto NULL
+#endif
+
+/* Previously, backends could only use SHT_REL or SHT_RELA relocation
+ sections, but not both. They defined USE_REL to indicate SHT_REL
+ sections, and left it undefined to indicated SHT_RELA sections.
+ For backwards compatibility, we still support this usage. */
+#ifndef USE_REL
+#define USE_REL 0
+#else
+#undef USE_REL
+#define USE_REL 1
+#endif
+
+/* Use these in new code. */
+#ifndef elf_backend_may_use_rel_p
+#define elf_backend_may_use_rel_p USE_REL
+#endif
+#ifndef elf_backend_may_use_rela_p
+#define elf_backend_may_use_rela_p !USE_REL
+#endif
+#ifndef elf_backend_default_use_rela_p
+#define elf_backend_default_use_rela_p !USE_REL
+#endif