From 5d7780931ea29da3ea762b78fc939151cf5c16df Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyich@gmail.com>
Date: Sun, 23 Feb 2025 13:20:14 +0000
Subject: [PATCH] openttd: fix build against icu-76

Without the change `openttd` build fails in `master` as
https://hydra.nixos.org/build/290760688:

    [100%] Linking CXX executable openttd
    ld: CMakeFiles/openttd_lib.dir/src/survey.cpp.o: undefined reference to symbol 'u_versionToString_76'
    ld: /nix/store/...-icu4c-76.1/lib/libicuuc.so.76: error adding symbols: DSO missing from command line
    collect2: error: ld returned 1 exit status
---
 pkgs/games/openttd/default.nix | 11 +++++++++++
 pkgs/games/openttd/jgrpp.nix   |  1 +
 2 files changed, 12 insertions(+)

diff --git a/pkgs/games/openttd/default.nix b/pkgs/games/openttd/default.nix
index 4a5e15514124..47e607e42159 100644
--- a/pkgs/games/openttd/default.nix
+++ b/pkgs/games/openttd/default.nix
@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchzip,
+  fetchpatch,
   cmake,
   pkg-config,
   SDL2,
@@ -71,6 +72,16 @@ stdenv.mkDerivation rec {
     hash = "sha256-YT4IE/rJ9pnpeMWKbOra6AbSUwW19RwOKlXkxwoMeKY=";
   };
 
+  patches = [
+    # Fix build against icu-76:
+    #   https://github.com/OpenTTD/OpenTTD/pull/13048
+    (fetchpatch {
+      name = "icu-75.patch";
+      url = "https://github.com/OpenTTD/OpenTTD/commit/14fac2ad37bfb9cec56b4f9169d864f6f1c7b96e.patch";
+      hash = "sha256-L35ybnTKPO+HVP/7ZYzWM2mA+s1RAywhofSuzpy/6sc=";
+    })
+  ];
+
   nativeBuildInputs = [
     cmake
     pkg-config
diff --git a/pkgs/games/openttd/jgrpp.nix b/pkgs/games/openttd/jgrpp.nix
index d1e89f298e5c..7a47074e00e9 100644
--- a/pkgs/games/openttd/jgrpp.nix
+++ b/pkgs/games/openttd/jgrpp.nix
@@ -10,6 +10,7 @@ openttd.overrideAttrs (oldAttrs: rec {
     rev = "jgrpp-${version}";
     hash = "sha256-aEmuwWNxqjuLmiWMrqwTUtCwdwDMA00eQspCHntxEXw=";
   };
+  patches = [];
 
   buildInputs = oldAttrs.buildInputs ++ [ zstd ];