From 521d72d76e60a1314655ac76a518f7a7a39b211d Mon Sep 17 00:00:00 2001
From: "Jason C.H" <ctrysbita@outlook.com>
Date: Sun, 9 Mar 2025 00:02:39 +0800
Subject: [PATCH] ggml-backend : make path_str compatible with C++20
 (llama/12269)

---
 ggml/src/ggml-backend-reg.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/ggml/src/ggml-backend-reg.cpp b/ggml/src/ggml-backend-reg.cpp
index d0d68bec..9bedeae7 100644
--- a/ggml/src/ggml-backend-reg.cpp
+++ b/ggml/src/ggml-backend-reg.cpp
@@ -76,7 +76,14 @@ namespace fs = std::filesystem;
 static std::string path_str(const fs::path & path) {
     std::string u8path;
     try {
+#if defined(__cpp_lib_char8_t)
+        // C++20 and later: u8string() returns std::u8string
+        std::u8string u8str = path.u8string();
+        u8path = std::string(reinterpret_cast<const char*>(u8str.c_str()));
+#else
+        // C++17: u8string() returns std::string
         u8path = path.u8string();
+#endif
     } catch (...) {
     }
     return u8path;