From 0d0b11a96c9ab92ad98b9603336e2c5991ec6761 Mon Sep 17 00:00:00 2001
From: DianQK <dianqk@dianqk.net>
Date: Wed, 14 Aug 2024 18:19:25 +0800
Subject: [PATCH] Revert "[rust] Comment out __builtin_available() use (#21)"

This reverts commit 0be5954ac3fd5df6f0a749f37de8dca316b689b7.
---
 llvm/lib/Support/Unix/Path.inc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/Support/Unix/Path.inc b/llvm/lib/Support/Unix/Path.inc
index f36cc37ffb2afd..cf05db546e0214 100644
--- a/llvm/lib/Support/Unix/Path.inc
+++ b/llvm/lib/Support/Unix/Path.inc
@@ -1491,7 +1491,7 @@ namespace fs {
 std::error_code copy_file(const Twine &From, const Twine &To) {
   std::string FromS = From.str();
   std::string ToS = To.str();
-#if 0 && __has_builtin(__builtin_available)
+#if __has_builtin(__builtin_available)
   if (__builtin_available(macos 10.12, *)) {
     // Optimistically try to use clonefile() and handle errors, rather than
     // calling stat() to see if it'll work.