From 1593980d7c2cc3944a1f958b3e16287ed46318dd Mon Sep 17 00:00:00 2001
From: Boris Zbarsky <bzbarsky@apple.com>
Date: Mon, 9 Jan 2023 10:25:25 -0500
Subject: [PATCH] Allow building with host toolchain when building arm64e on an
 arm64 host. (#24315)

The host toolchain should be fine in this case.
---
 build/config/BUILDCONFIG.gn | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/build/config/BUILDCONFIG.gn b/build/config/BUILDCONFIG.gn
index 9c63bd63b31466..13a13f804c3248 100644
--- a/build/config/BUILDCONFIG.gn
+++ b/build/config/BUILDCONFIG.gn
@@ -69,7 +69,9 @@ if (_chip_defaults.custom_toolchain != "") {
   }
 
   _default_toolchain = "${_build_overrides.build_root}/toolchain/linux:linux_${target_cpu}_${_target_compiler}"
-} else if (target_os == host_os && target_cpu == host_cpu) {
+} else if (target_os == host_os &&
+           (target_cpu == host_cpu ||
+            (target_cpu == "arm64e" && host_cpu == "arm64"))) {
   _default_toolchain = host_toolchain
 } else if (target_os == "freertos") {
   if (_chip_defaults.is_clang) {