From 03e96250ded7d382be3b21d946d0cf4f018be714 Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyich@gmail.com>
Date: Sun, 3 May 2026 14:34:08 +0100
Subject: [PATCH] dc3dd: fix for `gcc-15`

Without the chnage the build fails as https://hydra.nixos.org/build/326967790:

```
In file included from argmatch.c:22:
argmatch.c: In function '__argmatch_die':
./config.h:8:22: error: too many arguments to function 'usage'; expected 0, have 1
    8 | #define ARGMATCH_DIE usage (1)
      |                      ^~~~~  ~
```

Work it around by falling back to pre-c23 standard.
---
 pkgs/by-name/dc/dc3dd/package.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/by-name/dc/dc3dd/package.nix b/pkgs/by-name/dc/dc3dd/package.nix
index d78c6a50c13f..9acef0cd3d39 100644
--- a/pkgs/by-name/dc/dc3dd/package.nix
+++ b/pkgs/by-name/dc/dc3dd/package.nix
@@ -25,6 +25,9 @@ stdenv.mkDerivation (finalAttrs: {
 
   buildInputs = [ perlPackages.LocaleGettext ];
 
+  # Remove once upstream ports to c23: https://sourceforge.net/p/dc3dd/bugs/24/
+  env.NIX_CFLAGS_COMPILE = "-std=gnu17";
+
   makeFlags = [
     "PREFIX=$out"
     "CC=${stdenv.cc.targetPrefix}cc"