Merge WARN and CWARN cases in _bfd_generic_link_add_one_symbol

[Alan Modra <amodra@gmail.com>]

WARN has always been able to be handled by the CWARN case (WARN was
used when the previous symbols was undef, undefweak or common and thus
must be on the undefs list, so the CWARN test passes).  So let's merge
those two cases.

	* linker.c (WARN, CWARN): Collapse these states to WARN.
	(_bfd_generic_link_add_one_symbol): Use old CWARN case for
	new WARN.

diff --git a/bfd/linker.c b/bfd/linker.c
index 1877e67..93c5465 100644
--- a/bfd/linker.c
+++ b/bfd/linker.c
@@ -1342,8 +1342,7 @@ enum link_action
   CIND,		/* Make indirect symbol from existing common symbol.  */
   SET,		/* Add value to set.  */
   MWARN,	/* Make warning symbol.  */
-  WARN,		/* Issue warning.  */
-  CWARN,	/* Warn if referenced, else MWARN.  */
+  WARN,		/* Warn if referenced, else MWARN.  */
   CYCLE,	/* Repeat with symbol pointed to.  */
   REFC,		/* Mark indirect symbol referenced and then CYCLE.  */
   WARNC		/* Issue warning and then CYCLE.  */
@@ -1361,7 +1360,7 @@ static const enum link_action link_action[8][8] =
   /* DEFW_ROW 	*/  {DEFW,  DEFW,  DEFW,  NOACT, NOACT, NOACT, NOACT, CYCLE },
   /* COMMON_ROW	*/  {COM,   COM,   COM,   CREF,  COM,   BIG,   REFC,  WARNC },
   /* INDR_ROW	*/  {IND,   IND,   IND,   MDEF,  IND,   CIND,  MIND,  CYCLE },
-  /* WARN_ROW   */  {MWARN, WARN,  WARN,  CWARN, CWARN, WARN,  CWARN, NOACT },
+  /* WARN_ROW   */  {MWARN, WARN,  WARN,  WARN,  WARN,  WARN,  WARN,  NOACT },
   /* SET_ROW	*/  {SET,   SET,   SET,   SET,   SET,   SET,   CYCLE, CYCLE }
 };
 
@@ -1803,13 +1802,6 @@ _bfd_generic_link_add_one_symbol (struct bfd_link_info *info,
 	  break;
 
 	case WARN:
-	  /* Issue a warning.  */
-	  if (! (*info->callbacks->warning) (info, string, h->root.string,
-					     hash_entry_bfd (h), NULL, 0))
-	    return FALSE;
-	  break;
-
-	case CWARN:
 	  /* Warn if this symbol has been referenced already,
 	     otherwise add a warning.  A symbol has been referenced if
 	     the u.undef.next field is not NULL, or it is the tail of the

-- 
Alan Modra
Australia Development Lab, IBM