PR 6049

	* options.h (DEFINE_set): Add VARNAME_begin and VARNAME_end
	functions.
	(class General_options): Remove existing --undefined, and add
	--no-undefined instead.  Add new --undefined as synonym for -u.
	* archive.cc (Archive::add_symbols): Check whether symbol was
	named with -u.
	* gold.cc (queue_middle_tasks): Add -u symbols to symbol table.
	* symtab.h (class Symbol): Rename CONSTANT to IS_CONSTANT; change
	all uses.  Add IS_UNDEFINED.  Update declarations to split
	different versions of init_base.  Declare init_base_undefined.
	(Symbol::is_defined): Handle IS_UNDEFINED.
	(Symbol::is_undefined): Likewise.
	(Symbol::is_weak_undefined): Call is_undefined.
	(Symbol::is_absolute): Handle IS_CONSTANT.
	(class Sized_symbol): Update declarations to split different
	versions of init.  Declare init_undefined.
	(class Symbol_table): Declare new functions.
	* symtab.cc (Symbol::init_base_object): Rename from init_base.
	Change all callers.
	(Symbol::init_base_output_data): Likewise.
	(Symbol::init_base_output_segment): Likewise.
	(Symbol::init_base_constant): Likewise.
	(Symbol::init_base_undefined): New function.
	(Sized_symbol::init_object): Rename from init.  Change all
	callers.
	(Sized_symbol::init_output_data): Likewise.
	(Sized_symbol::init_output_segment): Likewise.
	(Sized_symbol::init_constant): Likewise.
	(Sized_symbol::init_undefined): New function.
	(Symbol_table::add_undefined_symbols_from_command_line): New
	function.
	(Symbol_table::do_add_undefined_symbols_from_command_line): New
	function.
	(Symbol::final_value_is_known): Handle IS_UNDEFINED.
	(Symbol::output_section): Likewise.
	(Symbol::set_output_section): Likewise.
	(Symbol_table::sized_finalize_symbol): Likewise.
	(Symbol_table::sized_write_globals): Likewise.
	* resolve.cc (Symbol_table::should_override): Likewise.
	(Symbol::override_base_with_special): Likewise.

1 files changed, 6 insertions, 2 deletions

diff --git a/gold/resolve.cc b/gold/resolve.cc
index 21a7fc6..291bca6 100644
--- a/gold/resolve.cc
+++ b/gold/resolve.cc
@@ -281,7 +281,10 @@ Symbol_table::should_override(const Symbol* to, unsigned int frombits,
   *adjust_common_sizes = false;
 
   unsigned int tobits;
-  if (to->source() != Symbol::FROM_OBJECT)
+  if (to->source() == Symbol::IS_UNDEFINED)
+    tobits = symbol_to_bits(to->binding(), false, elfcpp::SHN_UNDEF, true,
+			    to->type());
+  else if (to->source() != Symbol::FROM_OBJECT)
     tobits = symbol_to_bits(to->binding(), false, elfcpp::SHN_ABS, false,
 			    to->type());
   else
@@ -662,7 +665,8 @@ Symbol::override_base_with_special(const Symbol* from)
     case IN_OUTPUT_SEGMENT:
       this->u_.in_output_segment = from->u_.in_output_segment;
       break;
-    case CONSTANT:
+    case IS_CONSTANT:
+    case IS_UNDEFINED:
       break;
     default:
       gold_unreachable();