From 4e25b2965c23ada381ee17431e2b87b9451bcb89 Mon Sep 17 00:00:00 2001
From: Weijia Wang <9713184+wegank@users.noreply.github.com>
Date: Sat, 4 Nov 2023 18:12:10 +0100
Subject: [PATCH] cvs: fix build with clang 16

---
 pkgs/applications/version-management/cvs/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/applications/version-management/cvs/default.nix b/pkgs/applications/version-management/cvs/default.nix
index 9f039c4ab004..4ee553c6c4be 100644
--- a/pkgs/applications/version-management/cvs/default.nix
+++ b/pkgs/applications/version-management/cvs/default.nix
@@ -40,6 +40,10 @@ stdenv.mkDerivation rec {
     "AR=${stdenv.cc.targetPrefix}ar"
   ];
 
+  env = lib.optionalAttrs stdenv.cc.isClang {
+    NIX_CFLAGS_COMPILE = "-Wno-implicit-function-declaration";
+  };
+
   doCheck = false; # fails 1 of 1 tests
 
   meta = with lib; {