From 190bd87264e04e6d71766caddc8db0d21cf12b91 Mon Sep 17 00:00:00 2001
From: Sebastian Blunt <nix@sebastianblunt.com>
Date: Wed, 11 Mar 2026 03:55:18 -0700
Subject: [PATCH] splint: Build with gnu99

Otherwise it fails to build with
```
mtgrammar.c:139:37: error: too many arguments to function 'yyprint'; expected 0, have 3
```
See https://github.com/splintchecker/splint/issues/41 for the upstream
issue.
---
 pkgs/development/tools/analysis/splint/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/development/tools/analysis/splint/default.nix b/pkgs/development/tools/analysis/splint/default.nix
index fa35bf32b445..fe528974e664 100644
--- a/pkgs/development/tools/analysis/splint/default.nix
+++ b/pkgs/development/tools/analysis/splint/default.nix
@@ -18,6 +18,10 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ flex ];
 
+  buildFlags = [
+    "CFLAGS=-std=gnu99"
+  ];
+
   doCheck = true;
 
   meta = {