From 505bc7d4419f94a8f5437e60bee8d83bcf14ba80 Mon Sep 17 00:00:00 2001
From: FlameFlag <git@ps1.sh>
Date: Sun, 19 Apr 2026 18:52:36 +0300
Subject: [PATCH] a52dec: fix Darwin build by setting `-std=gnu17`

Refs: https://github.com/NixOS/nixpkgs/issues/511329
---
 pkgs/by-name/a5/a52dec/package.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/by-name/a5/a52dec/package.nix b/pkgs/by-name/a5/a52dec/package.nix
index d428b36d1785..1cd69b032794 100644
--- a/pkgs/by-name/a5/a52dec/package.nix
+++ b/pkgs/by-name/a5/a52dec/package.nix
@@ -23,6 +23,8 @@ stdenv.mkDerivation (finalAttrs: {
     "--enable-shared"
     # Define inline as __attribute__ ((__always_inline__))
     "ac_cv_c_inline=yes"
+    # C23 (Clang default w/ autoconf 2.73) rejects K&R-style declarations
+    "CFLAGS=-std=gnu17"
   ];
 
   makeFlags = [ "AR=${stdenv.cc.targetPrefix}ar" ];