include/

* bfdlink.h (bfd_link_callbacks): Add error_handler.

ld/

	* ldmain.c (link_callbacks): Initialize error_handler.

	* ldmisc.c (error_handler): New function.

	* ldmisc.h (error_handler): New prototype.

include/bfdlink.h

@@ -481,6 +481,11 @@ struct bfd_link_callbacks
   bfd_boolean (*notice)
     PARAMS ((struct bfd_link_info *, const char *name,
 	     bfd *abfd, asection *section, bfd_vma address));
+  /* A function which is called for reporting a linker error. ID is the
+     error identifier. The remaining input is the same as einfo () in
+     ld.  */
+  bfd_boolean (*error_handler)
+    PARAMS ((int id, const char * fmt, ...));
 };
 
 /* The linker builds link_order structures which tell the code how to