From f09390fbf15ae4f4a7e746060c9614f5b5561921 Mon Sep 17 00:00:00 2001
From: KWSys Upstream <kwrobot@kitware.com>
Date: Fri, 1 Nov 2024 07:49:35 -0400
Subject: [PATCH] KWSys 2024-11-01 (1cfc8445)

Code extracted from:

    https://gitlab.kitware.com/utils/kwsys.git

at commit 1cfc8445570dc46883e84301eb6c31ebc5867826 (master).

Upstream Shortlog
-----------------

Brad King (1):
      fdf4f2f8 SystemTools: Fix ReadSymlink for links to absolute paths on Windows
---
 SystemTools.cxx | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/SystemTools.cxx b/SystemTools.cxx
index f690476824..2f42a3f4b2 100644
--- a/SystemTools.cxx
+++ b/SystemTools.cxx
@@ -3392,6 +3392,14 @@ Status SystemTools::ReadSymlink(std::string const& newName,
   }
   std::wstring substituteName(substituteNameData, substituteNameLength);
   origName = Encoding::ToNarrow(substituteName);
+  // Symbolic links to absolute paths may use a NT Object Path prefix.
+  // If the path begins with "\??\UNC\", replace it with "\\".
+  // Otherwise, if the path begins with "\??\", remove the prefix.
+  if (origName.compare(0, 8, "\\??\\UNC\\") == 0) {
+    origName.erase(1, 6);
+  } else if (origName.compare(0, 4, "\\??\\") == 0) {
+    origName.erase(0, 4);
+  }
 #else
   char buf[KWSYS_SYSTEMTOOLS_MAXPATH + 1];
   int count = static_cast<int>(