From d9efac4aa626f91470bf610bd168c3ec2c022149 Mon Sep 17 00:00:00 2001
From: whispers <whispersofthedawn@duck.com>
Date: Wed, 23 Sep 2026 16:31:39 -0400
Subject: [PATCH] afflib: fix build with gcc 16

libafflib.so fails to link due to undefined references when using GCC 16.
---
 pkgs/by-name/af/afflib/package.nix | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/pkgs/by-name/af/afflib/package.nix b/pkgs/by-name/af/afflib/package.nix
index 58944ead3050..e939092afa10 100644
--- a/pkgs/by-name/af/afflib/package.nix
+++ b/pkgs/by-name/af/afflib/package.nix
@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchFromGitHub,
+  fetchpatch,
   zlib,
   curl,
   expat,
@@ -22,6 +23,16 @@ stdenv.mkDerivation (finalAttrs: {
     sha256 = "sha256-pGInhJQBhFJhft/KfB3J3S9/BVp9D8TZ+uw2CUNVC+Q=";
   };
 
+  patches = [
+    # libafflib.so fails to link due to undefined references when using GCC 16.
+    # https://github.com/sshock/AFFLIBv3/issues/60
+    (fetchpatch {
+      name = "gcc16-missing-declarations.patch";
+      url = "https://github.com/sshock/AFFLIBv3/commit/f35df6c1d2610e3233c30d50054c00e29d7d5a23.patch";
+      hash = "sha256-D7/PnePwb7ikuHIo+3MBPp4PI8uN8vNJ1rZykeXDdxU=";
+    })
+  ];
+
   nativeBuildInputs = [ autoreconfHook ];
   buildInputs = [
     zlib