From 23b4e3fabb44c2b8294725d1326c8e706f5d2375 Mon Sep 17 00:00:00 2001
From: Robert Scott <code@humanleg.org.uk>
Date: Sun, 12 Jan 2025 18:59:07 +0000
Subject: [PATCH] tevent: fix pkgsLLVM build

---
 pkgs/by-name/te/tevent/package.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkgs/by-name/te/tevent/package.nix b/pkgs/by-name/te/tevent/package.nix
index ef2a8dd47d3d..15ff833851a7 100644
--- a/pkgs/by-name/te/tevent/package.nix
+++ b/pkgs/by-name/te/tevent/package.nix
@@ -67,6 +67,11 @@ stdenv.mkDerivation rec {
   # module, which works correctly in all cases.
   PYTHON_CONFIG = "/invalid";
 
+  # https://reviews.llvm.org/D135402
+  NIX_LDFLAGS = lib.optional (
+    stdenv.cc.bintools.isLLVM && lib.versionAtLeast stdenv.cc.bintools.version "17"
+  ) "--undefined-version";
+
   meta = with lib; {
     description = "Event system based on the talloc memory management library";
     homepage = "https://tevent.samba.org/";