From b09b4dc99561cb69deee2fa30f2a32d76fec8b6e Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Tue, 21 Jan 2025 18:10:12 +0100
Subject: [PATCH] x86_64-darwin: Disable LTO

LTO on x86_64-darwin appears to break the ability to catch exceptions
correctly (maybe just for exception types defined in different
libraries). This leads to many weird test failures,
e.g. https://hydra.nixos.org/build/286312387 and
https://hydra.nixos.org/build/286312341.
---
 packaging/dependencies.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/packaging/dependencies.nix b/packaging/dependencies.nix
index 22d4cf9e3..acdbc9cfc 100644
--- a/packaging/dependencies.nix
+++ b/packaging/dependencies.nix
@@ -79,6 +79,8 @@ let
         !stdenv.hostPlatform.isWindows
         # build failure
         && !stdenv.hostPlatform.isStatic
+        # LTO breaks exception handling on x86-64-darwin.
+        && stdenv.system != "x86_64-darwin"
       ) ''
         case "$mesonBuildType" in
         release|minsize) appendToVar mesonFlags "-Db_lto=true"  ;;