1 files changed, 12 insertions, 1 deletions
diff --git a/gold/plugin.h b/gold/plugin.h
index db6093d..e64ee07 100644
--- a/gold/plugin.h
+++ b/gold/plugin.h
@@ -146,11 +146,18 @@ class Plugin_manager
       options_(options), workqueue_(NULL), task_(NULL), input_objects_(NULL),
       symtab_(NULL), layout_(NULL), dirpath_(NULL), mapfile_(NULL),
       this_blocker_(NULL), extra_search_path_(), lock_(NULL),
-      initialize_lock_(&lock_)
+      initialize_lock_(&lock_), defsym_defines_set_()
   { this->current_ = plugins_.end(); }
 
   ~Plugin_manager();
 
+  // Returns true if the symbol name is used in the LHS of a defsym.
+  bool
+  is_defsym_def(const char* sym_name) const
+  {
+    return defsym_defines_set_.find(sym_name) != defsym_defines_set_.end();
+  }
+
   // Add a plugin library.
   void
   add_plugin(const char* filename)
@@ -402,6 +409,10 @@ class Plugin_manager
   std::string extra_search_path_;
   Lock* lock_;
   Initialize_lock initialize_lock_;
+
+  // Keep track of all symbols defined by defsym.
+  typedef Unordered_set<std::string> Defsym_defines_set;
+  Defsym_defines_set defsym_defines_set_;
 };