Add Filesystem TS -- Complete

Add the completed std::experimental::filesystem implementation and tests.
The implementation supports C++11 or newer.

The TS is built as part of 'libc++experimental.a'. Users of the TS need to
manually link this library. Building and testing the TS can be disabled using
the CMake option '-DLIBCXX_ENABLE_FILESYSTEM=OFF'.

Currently 'libc++experimental.a' is not installed by default. To turn on the
installation of the library use '-DLIBCXX_INSTALL_EXPERIMENTAL_LIBRARY=ON'.

llvm-svn: 273034

1 files changed, 24 insertions, 0 deletions

diff --git a/libcxx/test/std/experimental/filesystem/fs.req.macros/feature_macro.pass.cpp b/libcxx/test/std/experimental/filesystem/fs.req.macros/feature_macro.pass.cpp
new file mode 100644
index 00000000000..d57dff4a7b7
--- /dev/null
+++ b/libcxx/test/std/experimental/filesystem/fs.req.macros/feature_macro.pass.cpp
@@ -0,0 +1,24 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03
+
+// <experimental/filesystem>
+
+// #define __cpp_lib_experimental_filesystem 201406L
+
+#include <experimental/filesystem>
+
+#ifndef __cpp_lib_experimental_filesystem
+#error Filesystem feature test macro is not defined  (__cpp_lib_experimental_filesystem)
+#elif __cpp_lib_experimental_filesystem != 201406L
+#error Filesystem feature test macro has an incorrect value (__cpp_lib_experimental_filesystem)
+#endif
+
+int main() { }