From 7ce464459d12260e715c8519bb18e2239c322a32 Mon Sep 17 00:00:00 2001
From: Randy Eckenrode <randy@largeandhighquality.com>
Date: Sat, 20 Jul 2024 00:30:46 -0400
Subject: [PATCH] wv2: fix build with clang 16 and on Darwin

- Set the language version to C++14, so Synfig Studio can continue using the deprecated APIs; and
- Explicitly link gobject-2.0 on Darwin to avoid missing symbol errors when linking.
---
 pkgs/tools/misc/wv2/default.nix | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/pkgs/tools/misc/wv2/default.nix b/pkgs/tools/misc/wv2/default.nix
index 14420c1c3908..3a7bd5d395a6 100644
--- a/pkgs/tools/misc/wv2/default.nix
+++ b/pkgs/tools/misc/wv2/default.nix
@@ -10,6 +10,15 @@ stdenv.mkDerivation rec {
 
   patches = [ ./fix-include.patch ];
 
+  # Newer versions of clang default to C++17, which removes some deprecated APIs such as bind1st.
+  # Setting the language version to C++14 makes them available again.
+  cmakeFlags = lib.optionals stdenv.cc.isClang [ (lib.cmakeFeature "CMAKE_CXX_STANDARD" "14") ];
+
+  # Linking gobject explicitly fixes missing symbols (such as missing `_g_object_unref`) on Darwin.
+  preConfigure = lib.optionalString stdenv.isDarwin ''
+    export NIX_LDFLAGS+=" $(pkg-config gobject-2.0 --libs)"
+  '';
+
   nativeBuildInputs = [ cmake pkg-config ];
   buildInputs = [ libgsf glib libxml2 ];