From ea15d856214fc700d25de3c6c8ddfae88835071d Mon Sep 17 00:00:00 2001
From: eljamm <fedi.jamoussi@protonmail.ch>
Date: Fri, 9 Jan 2026 11:18:38 +0100
Subject: [PATCH] termcap: fix build with gcc15

The ISO C23, which is the default in GCC 15, changes the meaning of an
empty argument list from an unspecified list to no arguments, thus
breaking the build.

This is fixed by switching the language standard to `gnu89` (dialect of
ISO C90).
---
 pkgs/by-name/te/termcap/package.nix | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/pkgs/by-name/te/termcap/package.nix b/pkgs/by-name/te/termcap/package.nix
index a0cf6eaadeb6..9c2311d6420d 100644
--- a/pkgs/by-name/te/termcap/package.nix
+++ b/pkgs/by-name/te/termcap/package.nix
@@ -8,12 +8,12 @@
   enableShared ? !stdenv.hostPlatform.isStatic,
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: {
   pname = "termcap";
   version = "1.3.1";
 
   src = fetchurl {
-    url = "mirror://gnu/termcap/termcap-${version}.tar.gz";
+    url = "mirror://gnu/termcap/termcap-${finalAttrs.version}.tar.gz";
     hash = "sha256-kaDiLlOHykRntbyxjt8cUbkwJi/UZtX9o5bdnSZxkQA=";
   };
 
@@ -43,6 +43,7 @@ stdenv.mkDerivation rec {
   env.NIX_CFLAGS_COMPILE = toString (
     [
       "-DSTDC_HEADERS"
+      "-std=gnu89"
     ]
     ++ lib.optionals stdenv.cc.isClang [
       "-Wno-implicit-function-declaration"
@@ -76,4 +77,4 @@ stdenv.mkDerivation rec {
     maintainers = with lib.maintainers; [ wegank ];
     platforms = lib.platforms.all;
   };
-}
+})