From 8f22341605dc479276e096216f099ff5348f4407 Mon Sep 17 00:00:00 2001
From: Audrey Dutcher <audrey@rhelmot.io>
Date: Sun, 23 Feb 2025 02:34:49 -0700
Subject: [PATCH] libcdio: Add --undefined-version to fix FreeBSD build

Reprted upstream; see comment
---
 pkgs/development/libraries/libcdio/default.nix | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/pkgs/development/libraries/libcdio/default.nix b/pkgs/development/libraries/libcdio/default.nix
index 51a94bab3ce2b2..d51dba1fe01365 100644
--- a/pkgs/development/libraries/libcdio/default.nix
+++ b/pkgs/development/libraries/libcdio/default.nix
@@ -58,9 +58,14 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
-  env = lib.optionalAttrs stdenv.cc.isGNU {
-    NIX_CFLAGS_COMPILE = "-Wno-error=implicit-function-declaration";
-  };
+  env =
+    lib.optionalAttrs stdenv.cc.isGNU {
+      NIX_CFLAGS_COMPILE = "-Wno-error=implicit-function-declaration";
+    }
+    // lib.optionalAttrs stdenv.cc.bintools.isLLVM {
+      # https://github.com/libcdio/libcdio/issues/20
+      NIX_LDFLAGS = "--undefined-version";
+    };
 
   doCheck = !stdenv.hostPlatform.isDarwin;