Add some missing anchors.

llvm-svn: 145578
diff --git a/llvm/lib/Support/CommandLine.cpp b/llvm/lib/Support/CommandLine.cpp
index 4b43ae9..ce93449 100644
--- a/llvm/lib/Support/CommandLine.cpp
+++ b/llvm/lib/Support/CommandLine.cpp
@@ -57,6 +57,9 @@
 TEMPLATE_INSTANTIATION(class opt<bool>);
 } } // end namespace llvm::cl
 
+void GenericOptionValue::anchor() {}
+void OptionValue<boolOrDefault>::anchor() {}
+void OptionValue<std::string>::anchor() {}
 void Option::anchor() {}
 void basic_parser_impl::anchor() {}
 void parser<bool>::anchor() {}