1 files changed, 7 insertions, 0 deletions
diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index ab1a1b4025..574c18c2e3 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -9483,6 +9483,13 @@ void Sema::ActOnFields(Scope* S,
         else if (Fields.size() == 1) 
           Diag(FD->getLocation(), diag::ext_flexible_array_empty_aggregate_gnu)
             << FD->getDeclName() << Record->getTagKind();
+      } else if (!getLangOpts().C99) {
+      if (Record->isUnion())
+        Diag(FD->getLocation(), diag::ext_flexible_array_union_gnu)
+          << FD->getDeclName();
+      else
+        Diag(FD->getLocation(), diag::ext_c99_flexible_array_member)
+          << FD->getDeclName() << Record->getTagKind();
       } else if (NumNamedMembers < 1) {
         Diag(FD->getLocation(), diag::err_flexible_array_empty_struct)
           << FD->getDeclName();