re PR lto/47247 (Linker plugin specification makes it difficult to handle COMDATs)

	PR lto/47247
	* plugin-api.h (enum ld_plugin_symbol_resolution): Add
	LDPR_PREVAILING_DEF_IRONLY_EXP.
	(enum ld_plugin_tag): Add LDPT_GET_SYMBOLS_V2.

From-SVN: r179220

include/ChangeLog

+2011-09-26  Cary Coutant  <ccoutant@google.com>
+
+	PR lto/47247
+	* plugin-api.h (enum ld_plugin_symbol_resolution): Add
+	LDPR_PREVAILING_DEF_IRONLY_EXP.
+	(enum ld_plugin_tag): Add LDPT_GET_SYMBOLS_V2.
+
 2011-09-23  Cary Coutant  <ccoutant@google.com>
 
 	PR 40831

include/plugin-api.h

@@ -155,7 +155,13 @@ enum ld_plugin_symbol_resolution
   LDPR_RESOLVED_EXEC,
 
   /* This symbol was resolved by a definition in a shared object.  */
-  LDPR_RESOLVED_DYN
+  LDPR_RESOLVED_DYN,
+
+  /* This is the prevailing definition of the symbol, with no
+     references from regular objects.  It is only referenced from IR
+     code, but the symbol is exported and may be referenced from
+     a dynamic object (not seen at link time).  */
+  LDPR_PREVAILING_DEF_IRONLY_EXP
 };
 
 /* The plugin library's "claim file" handler.  */
@@ -347,7 +353,8 @@ enum ld_plugin_tag
   LDPT_GET_INPUT_SECTION_NAME,
   LDPT_GET_INPUT_SECTION_CONTENTS,
   LDPT_UPDATE_SECTION_ORDER,
-  LDPT_ALLOW_SECTION_ORDERING
+  LDPT_ALLOW_SECTION_ORDERING,
+  LDPT_GET_SYMBOLS_V2
 };
 
 /* The plugin transfer vector.  */