From 9bb3f589b56330c7268aa6bf632fe8db3250791d Mon Sep 17 00:00:00 2001
From: Ben Barham <ben_barham@apple.com>
Date: Thu, 22 May 2025 19:07:44 -0700
Subject: [PATCH] [Driver] Add missing -default-isolation to the old driver

Resolves rdar://151643763.

(cherry picked from commit 0b7fbb64190c5b055c3f569dd70f9a2bda14a18b)
---
 lib/Driver/ToolChains.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/Driver/ToolChains.cpp b/lib/Driver/ToolChains.cpp
index e79eea48605a5..4c4f68e8a728d 100644
--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
@@ -290,6 +290,8 @@ void ToolChain::addCommonFrontendArgs(const OutputInfo &OI,
   inputArgs.AddLastArg(arguments, options::OPT_enable_app_extension);
   inputArgs.AddLastArg(arguments, options::OPT_enable_app_extension_library);
   inputArgs.AddLastArg(arguments, options::OPT_enable_library_evolution);
+  inputArgs.AddLastArg(arguments, options::OPT_default_isolation);
+  inputArgs.AddLastArg(arguments, options::OPT_default_isolation_EQ);
   inputArgs.AddLastArg(arguments, options::OPT_require_explicit_availability);
   inputArgs.AddLastArg(arguments, options::OPT_require_explicit_availability_target);
   inputArgs.AddLastArg(arguments, options::OPT_require_explicit_availability_EQ);