From aa0adcdb7cb758122a7c8370566aa5fc516d24e8 Mon Sep 17 00:00:00 2001
From: Zachary Anderson <zanderso@users.noreply.github.com>
Date: Thu, 28 Jul 2022 12:44:54 -0700
Subject: [PATCH] Compute rather than hardcode the host output suffix
 (flutter/engine#34978)

---
 engine/src/flutter/lib/snapshot/BUILD.gn | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/engine/src/flutter/lib/snapshot/BUILD.gn b/engine/src/flutter/lib/snapshot/BUILD.gn
index c807acf1b13..2c05b6cc4ff 100644
--- a/engine/src/flutter/lib/snapshot/BUILD.gn
+++ b/engine/src/flutter/lib/snapshot/BUILD.gn
@@ -205,18 +205,16 @@ bin_to_linkable("platform_strong_dill_linkable") {
 
 if (host_os == "mac" && (target_cpu == "arm" || target_cpu == "arm64")) {
   action("create_arm_gen_snapshot") {
-    if (host_cpu == "arm64") {
-      clang_dir = "clang_arm64"
-    } else {
-      clang_dir = "clang_x64"
-    }
-    output_dir = "$root_out_dir/$clang_dir"
+    host_output_dir = get_label_info(
+            "//third_party/dart/runtime/bin:gen_snapshot($host_toolchain)",
+            "root_out_dir")
+    clang_dir = rebase_path(host_output_dir, root_build_dir)
     script = "//flutter/sky/tools/create_macos_gen_snapshots.py"
     visibility = [ ":*" ]
     deps = [ "//third_party/dart/runtime/bin:gen_snapshot($host_toolchain)" ]
     args = [
       "--dst",
-      rebase_path(output_dir),
+      rebase_path(host_output_dir),
       "--clang-dir",
       clang_dir,
     ]
@@ -225,13 +223,13 @@ if (host_os == "mac" && (target_cpu == "arm" || target_cpu == "arm64")) {
         "--armv7-out-dir",
         rebase_path("$root_out_dir"),
       ]
-      outputs = [ "$output_dir/gen_snapshot_armv7" ]
+      outputs = [ "$host_output_dir/gen_snapshot_armv7" ]
     } else {
       args += [
         "--arm64-out-dir",
         rebase_path("$root_out_dir"),
       ]
-      outputs = [ "$output_dir/gen_snapshot_arm64" ]
+      outputs = [ "$host_output_dir/gen_snapshot_arm64" ]
     }
   }
 }