From bf6d88bf0e33c058d2596e8671610ad2cf271d89 Mon Sep 17 00:00:00 2001
From: Xiangyan Sun <wishstudio@gmail.com>
Date: Thu, 9 Apr 2026 15:42:34 -0700
Subject: [PATCH] bip: fix build with gcc15

---
 pkgs/by-name/bi/bip/package.nix | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/pkgs/by-name/bi/bip/package.nix b/pkgs/by-name/bi/bip/package.nix
index 1d4655cc83ab..a6844808867c 100644
--- a/pkgs/by-name/bi/bip/package.nix
+++ b/pkgs/by-name/bi/bip/package.nix
@@ -7,6 +7,7 @@
   bison,
   flex,
   openssl,
+  versionCheckHook,
 }:
 
 stdenv.mkDerivation {
@@ -27,9 +28,13 @@ stdenv.mkDerivation {
 
   postPatch = ''
     # Drop blanket -Werror to avoid build failure on fresh toolchains
-    # and libraries. Without the cnage build fails on gcc-13 and on
+    # and libraries. Without the change build fails on gcc-13 and on
     # openssl-3.
     substituteInPlace src/Makefile.am --replace-fail ' -Werror ' ' '
+    # Fix incompatible function pointer type for cmp in list_t
+    # The cmp function pointer is declared as taking no arguments but is
+    # used with qsort-style callback signature (const void *, const void *)
+    substituteInPlace src/util.h --replace-fail 'int (*cmp)()' 'int (*cmp)(const void *, const void *)'
   '';
 
   nativeBuildInputs = [
@@ -44,6 +49,10 @@ stdenv.mkDerivation {
 
   enableParallelBuilding = true;
 
+  nativeInstallCheckInputs = [ versionCheckHook ];
+  versionCheckProgramArg = "-v";
+  doInstallCheck = true;
+
   meta = {
     description = "IRC proxy (bouncer)";
     homepage = "http://bip.milkypond.org/";