Add support for -Bsymbolic.

gold/options.cc

@@ -312,6 +312,8 @@ options::Command_line_options::options[] =
   POSDEP_NOARG('\0', "no-as-needed",
 	       N_("Always DT_NEEDED for dynamic libs (default)"),
 	       NULL, TWO_DASHES, &Position_dependent_options::clear_as_needed),
+  GENERAL_NOARG('\0', "Bsymbolic", N_("Bind defined symbols locally"),
+		NULL, ONE_DASH, &General_options::set_symbolic),
   GENERAL_NOARG('E', "export-dynamic", N_("Export all dynamic symbols"),
                 NULL, TWO_DASHES, &General_options::set_export_dynamic),
   GENERAL_NOARG('\0', "eh-frame-hdr", N_("Create exception frame header"),
@@ -407,6 +409,7 @@ General_options::General_options()
     output_file_name_("a.out"),
     is_relocatable_(false),
     strip_(STRIP_NONE),
+    symbolic_(false),
     create_eh_frame_hdr_(false),
     rpath_(),
     rpath_link_(),

gold/options.h

@@ -144,6 +144,11 @@ class General_options
   strip_debug() const
   { return this->strip_ == STRIP_ALL || this->strip_ == STRIP_DEBUG; }
 
+  // -Bsymbolic: bind defined symbols locally.
+  bool
+  symbolic() const
+  { return this->symbolic_; }
+
   // --eh-frame-hdr: Whether to generate an exception frame header.
   bool
   create_eh_frame_hdr() const
@@ -266,6 +271,10 @@ class General_options
   set_strip_debug()
   { this->strip_ = STRIP_DEBUG; }
 
+  void
+  set_symbolic()
+  { this->symbolic_ = true; }
+
   void
   set_create_eh_frame_hdr()
   { this->create_eh_frame_hdr_ = true; }
@@ -366,6 +375,7 @@ class General_options
   const char* output_file_name_;
   bool is_relocatable_;
   Strip strip_;
+  bool symbolic_;
   bool create_eh_frame_hdr_;
   Dir_list rpath_;
   Dir_list rpath_link_;

gold/parameters.cc

@@ -32,7 +32,7 @@ namespace gold
 
 Parameters::Parameters(const General_options* options, Errors* errors)
   : errors_(errors), output_file_name_(options->output_file_name()),
-    sysroot_(options->sysroot()),
+    sysroot_(options->sysroot()), symbolic_(options->symbolic()),
     is_doing_static_link_valid_(false), doing_static_link_(false),
     is_size_and_endian_valid_(false), size_(0), is_big_endian_(false),
     optimization_level_(options->optimization_level()),

gold/parameters.h

@@ -91,6 +91,12 @@ class Parameters
   strip_debug() const
   { return this->strip_ == STRIP_ALL || this->strip_ == STRIP_DEBUG; }
 
+  // Whether we are doing a symbolic link, in which all defined
+  // symbols are bound locally.
+  bool
+  symbolic() const
+  { return this->symbolic_; }
+
   // Whether we are doing a static link--a link in which none of the
   // input files are shared libraries.  This is only known after we
   // have seen all the input files.
@@ -170,6 +176,8 @@ class Parameters
   std::string sysroot_;
   // Which symbols to strip.
   Strip strip_;
+  // Whether we are doing a symbolic link.
+  bool symbolic_;
 
   // Whether the doing_static_link_ field is valid.
   bool is_doing_static_link_valid_;

gold/symtab.h

@@ -407,7 +407,8 @@ class Symbol
   {
     return (this->visibility_ != elfcpp::STV_INTERNAL
             && this->visibility_ != elfcpp::STV_HIDDEN
-            && this->visibility_ != elfcpp::STV_PROTECTED);
+            && this->visibility_ != elfcpp::STV_PROTECTED
+	    && !parameters->symbolic());
   }
 
   // Return whether there should be a warning for references to this