Add LTO_SYMBOL_DEFINITION_WEAKUNDEF, use that on the gold plugin.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69972 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/gold/gold-plugin.cpp b/tools/gold/gold-plugin.cpp
index 9ad0450..260e175 100644
--- a/tools/gold/gold-plugin.cpp
+++ b/tools/gold/gold-plugin.cpp
@@ -257,6 +257,9 @@
       case LTO_SYMBOL_DEFINITION_WEAK:
         sym.def = LDPK_WEAKDEF;
         break;
+      case LTO_SYMBOL_DEFINITION_WEAKUNDEF:
+        sym.def = LDPK_WEAKUNDEF;
+        break;
       default:
         (*message)(LDPL_ERROR, "Unknown definition attribute: %d", definition);
         return LDPS_ERR;