Build error

[Sinha, Prokash]

I was trying to build the latest from the svn trunk  - clang/llvm -

langAttrEmitter.cpp:994:29: error: 'SimpleArgument' does not refer to a value
    Ptr = llvm::make_unique<SimpleArgument>(Arg, Attr, "int");
                            ^
ClangAttrEmitter.cpp:216:9: note: declared here
  class SimpleArgument : public Argument {
        ^
ClangAttrEmitter.cpp:994:45: warning: expression result unused [-Wunused-value]
    Ptr = llvm::make_unique<SimpleArgument>(Arg, Attr, "int");
                                            ^~~
ClangAttrEmitter.cpp:994:50: warning: expression result unused [-Wunused-value]
    Ptr = llvm::make_unique<SimpleArgument>(Arg, Attr, "int");
                                                 ^~~~
ClangAttrEmitter.cpp:996:17: error: no member named 'make_unique' in namespace 'llvm'
    Ptr = llvm::make_unique<StringArgument>(Arg, Attr);
          ~~~~~~^

Any suggestion?

Thanks
-prokash