From 50433c5c8f0e78438f7ad4bb4fecc35461076daf Mon Sep 17 00:00:00 2001
From: Aaron Jheng <wentworth@outlook.com>
Date: Tue, 14 Oct 2025 14:39:42 +0800
Subject: [PATCH] antlr4_9.runtime.cpp: fix build

---
 .../parsing/antlr/4.9.runtime.cpp.cmake.patch | 20 +++++++++++++++++++
 pkgs/development/tools/parsing/antlr/4.nix    |  2 ++
 2 files changed, 22 insertions(+)
 create mode 100644 pkgs/development/tools/parsing/antlr/4.9.runtime.cpp.cmake.patch

diff --git a/pkgs/development/tools/parsing/antlr/4.9.runtime.cpp.cmake.patch b/pkgs/development/tools/parsing/antlr/4.9.runtime.cpp.cmake.patch
new file mode 100644
index 000000000000..979e224756e6
--- /dev/null
+++ b/pkgs/development/tools/parsing/antlr/4.9.runtime.cpp.cmake.patch
@@ -0,0 +1,20 @@
+diff --git a/runtime/Cpp/CMakeLists.txt b/runtime/Cpp/CMakeLists.txt
+index e549f113f..c84f591c2 100644
+--- a/runtime/Cpp/CMakeLists.txt
++++ b/runtime/Cpp/CMakeLists.txt
+@@ -28,15 +28,10 @@ project(LIBANTLR4)
+ if(CMAKE_VERSION VERSION_EQUAL "3.0.0" OR
+    CMAKE_VERSION VERSION_GREATER "3.0.0")
+   CMAKE_POLICY(SET CMP0026 NEW)
+-  CMAKE_POLICY(SET CMP0054 OLD)
+-  CMAKE_POLICY(SET CMP0045 OLD)
+-  CMAKE_POLICY(SET CMP0042 OLD)
+ endif()
+ 
+ if(CMAKE_VERSION VERSION_EQUAL "3.3.0" OR
+    CMAKE_VERSION VERSION_GREATER "3.3.0")
+-  CMAKE_POLICY(SET CMP0059 OLD)
+-  CMAKE_POLICY(SET CMP0054 OLD)
+ endif()
+ 
+ if(CMAKE_SYSTEM_NAME MATCHES "Linux")
diff --git a/pkgs/development/tools/parsing/antlr/4.nix b/pkgs/development/tools/parsing/antlr/4.nix
index c30d235c4f8e..02fd86abde21 100644
--- a/pkgs/development/tools/parsing/antlr/4.nix
+++ b/pkgs/development/tools/parsing/antlr/4.nix
@@ -194,9 +194,11 @@ in
       extraCppBuildInputs = [ utf8cpp ] ++ lib.optional stdenv.hostPlatform.isLinux libuuid;
       extraCppCmakeFlags = [
         (lib.cmakeFeature "CMAKE_CXX_FLAGS" "-I${lib.getDev utf8cpp}/include/utf8cpp")
+        (lib.cmakeFeature "CMAKE_POLICY_VERSION_MINIMUM" "3.5")
       ];
       extraPatches = [
         ./utf8cpp.patch
+        ./4.9.runtime.cpp.cmake.patch
       ];
     }).antlr;