29#ifndef _GLIBCXX_TR1_CSTDIO
30#define _GLIBCXX_TR1_CSTDIO 1
32#pragma GCC system_header
36#if _GLIBCXX_USE_C99_STDIO
38namespace std _GLIBCXX_VISIBILITY(default)
40_GLIBCXX_BEGIN_NAMESPACE_VERSION
52_GLIBCXX_END_NAMESPACE_VERSION
ISO C++ entities toplevel namespace is std.