From fa6b177e15839d044c13b3e1df2034e861e8a684 Mon Sep 17 00:00:00 2001
From: Ming-Chuan <ming@culpring.com>
Date: Mon, 17 Aug 2026 16:29:35 -0700
Subject: [PATCH] ibus-libpinyin: fix build with opencc 1.4.0

---
 .../ibus-engines/ibus-libpinyin/default.nix            | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/pkgs/tools/inputmethods/ibus-engines/ibus-libpinyin/default.nix b/pkgs/tools/inputmethods/ibus-engines/ibus-libpinyin/default.nix
index 6412d8731901..4c4e7b813dff 100644
--- a/pkgs/tools/inputmethods/ibus-engines/ibus-libpinyin/default.nix
+++ b/pkgs/tools/inputmethods/ibus-engines/ibus-libpinyin/default.nix
@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchFromGitHub,
+  fetchpatch2,
   autoreconfHook,
   gettext,
   gobject-introspection,
@@ -32,6 +33,15 @@ stdenv.mkDerivation rec {
     hash = "sha256-3QZHovjzGifWLFVudCnJOwMn/M3Nzfn8CZ1HpQwzUVw=";
   };
 
+  patches = [
+    # Drop -std=c++0x, fix build with opencc >= 1.4.0 header files, which require C++17
+    (fetchpatch2 {
+      name = "fix-build-with-opencc-1.4.patch";
+      url = "https://github.com/libpinyin/ibus-libpinyin/commit/42ad7d20b803c10ce6d8921ccff5c6282bb4818c.patch?full_index=1";
+      hash = "sha256-ndAJd+EEyluvjZL1gXM8HbfgEtwQETw0Lu1WAwcou4M=";
+    })
+  ];
+
   nativeBuildInputs = [
     autoreconfHook
     gettext