Create multilevel debug mode
llvm-svn: 139913
diff --git a/libcxx/include/__debug b/libcxx/include/__debug
index e7d027a..4e80c6f 100644
--- a/libcxx/include/__debug
+++ b/libcxx/include/__debug
@@ -11,11 +11,17 @@
#ifndef _LIBCPP_DEBUG_H
#define _LIBCPP_DEBUG_H
+#if _LIBCPP_DEBUG_LEVEL >= 1
+
# include <cstdlib>
# include <cstdio>
# include <cstddef>
# define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : (_VSTD::printf("%s\n", m), _VSTD::abort()))
+#endif
+
+#if _LIBCPP_DEBUG_LEVEL >= 2
+
_LIBCPP_BEGIN_NAMESPACE_STD
struct _LIBCPP_VISIBLE __c_node;
@@ -177,5 +183,7 @@
_LIBCPP_END_NAMESPACE_STD
+#endif
+
#endif // _LIBCPP_DEBUG_H