From 1e194a33f20ce8080da7184c4023a93103fd1b57 Mon Sep 17 00:00:00 2001
From: Robert Scott <code@humanleg.org.uk>
Date: Sun, 12 Jan 2025 18:58:56 +0000
Subject: [PATCH] tdb: fix pkgsLLVM build

---
 pkgs/by-name/td/tdb/package.nix | 53 ++++++++++++++++++++-------------
 1 file changed, 32 insertions(+), 21 deletions(-)

diff --git a/pkgs/by-name/td/tdb/package.nix b/pkgs/by-name/td/tdb/package.nix
index 3cf8aabc948e..439256acb8a6 100644
--- a/pkgs/by-name/td/tdb/package.nix
+++ b/pkgs/by-name/td/tdb/package.nix
@@ -1,14 +1,16 @@
-{ lib, stdenv
-, fetchurl
-, pkg-config
-, wafHook
-, buildPackages
-, python3
-, readline
-, libxslt
-, libxcrypt
-, docbook-xsl-nons
-, docbook_xml_dtd_45
+{
+  lib,
+  stdenv,
+  fetchurl,
+  pkg-config,
+  wafHook,
+  buildPackages,
+  python3,
+  readline,
+  libxslt,
+  libxcrypt,
+  docbook-xsl-nons,
+  docbook_xml_dtd_45,
 }:
 
 stdenv.mkDerivation rec {
@@ -44,23 +46,32 @@ stdenv.mkDerivation rec {
 
   wafPath = "buildtools/bin/waf";
 
-  wafConfigureFlags = [
-    "--bundled-libraries=NONE"
-    "--builtin-libraries=replace"
-  ] ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
-    "--cross-compile"
-    "--cross-execute=${stdenv.hostPlatform.emulator buildPackages}"
-  ];
+  wafConfigureFlags =
+    [
+      "--bundled-libraries=NONE"
+      "--builtin-libraries=replace"
+    ]
+    ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
+      "--cross-compile"
+      "--cross-execute=${stdenv.hostPlatform.emulator buildPackages}"
+    ];
 
-  postFixup = if stdenv.hostPlatform.isDarwin
-    then ''install_name_tool -id $out/lib/libtdb.dylib $out/lib/libtdb.dylib''
-    else null;
+  postFixup =
+    if stdenv.hostPlatform.isDarwin then
+      ''install_name_tool -id $out/lib/libtdb.dylib $out/lib/libtdb.dylib''
+    else
+      null;
 
   # python-config from build Python gives incorrect values when cross-compiling.
   # If python-config is not found, the build falls back to using the sysconfig
   # 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 = "Trivial database";
     longDescription = ''