[libc-commits] [libc] [libc] Add osutils for Windows and make libc and its tests build on Windows target (PR #104676)

[Sirui Mu via libc-commits]

================
@@ -0,0 +1,22 @@
+//===------------- Windows implementation of IO utils -----------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "io.h"
+#include "src/__support/macros/config.h"
+
+#define WIN32_LEAN_AND_MEAN
+#include <Windows.h>
----------------
Lancern wrote:

> we probably should add some explicit error for Windows + full build in the cmake so that the errors people get on Windows won't be too confusing.

Updated in `libc/cmake/modules/LLVMLibCArchitectures.cmake` and made this a hard cmake configure error.

https://github.com/llvm/llvm-project/pull/104676