[libc++] Drop support for CRTs older than VS 2015
LLVM dropped support for Visual Studio versions older than 2015 quite
some time ago, so I consider it safe to drop libc++'s support for older
CRTs. The CRT in Visual Studio 2015 provides a lot of previously missing
functions, so targeting it requires less special casing.
Differential Revision: https://reviews.llvm.org/D31798
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@299743 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/cstdio b/include/cstdio
index 35941ce..00b989f 100644
--- a/include/cstdio
+++ b/include/cstdio
@@ -98,9 +98,6 @@
#include <__config>
#include <stdio.h>
-#if defined(_LIBCPP_MSVCRT)
-#include <crtversion.h>
-#endif
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#pragma GCC system_header
@@ -156,8 +153,7 @@
#ifndef _LIBCPP_HAS_NO_STDIN
using ::getchar;
-#if _LIBCPP_STD_VER <= 11 && \
- (!defined(_VC_CRT_MAJOR_VERSION) || _VC_CRT_MAJOR_VERSION < 14)
+#if _LIBCPP_STD_VER <= 11 && !defined(_LIBCPP_MSVCRT)
using ::gets;
#endif
using ::scanf;