Add CMake build and fix major Linux blockers.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@121510 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/__split_buffer b/include/__split_buffer
index 88e2c83..718fd88 100644
--- a/include/__split_buffer
+++ b/include/__split_buffer
@@ -85,12 +85,14 @@
void shrink_to_fit();
void push_front(const_reference __x);
void push_back(const_reference __x);
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
void push_front(value_type&& __x);
void push_back(value_type&& __x);
+#if !defined(_LIBCPP_HAS_NO_VARIADICS)
template <class... _Args>
void emplace_back(_Args&&... __args);
-#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif // !defined(_LIBCPP_HAS_NO_VARIADICS)
+#endif // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
_LIBCPP_INLINE_VISIBILITY void pop_front() {__destruct_at_begin(__begin_+1);}
_LIBCPP_INLINE_VISIBILITY void pop_back() {__destruct_at_end(__end_-1);}