From 40fc3ea8e9da0a76371bd8bf2050efa69a7efe9e Mon Sep 17 00:00:00 2001
From: Boris Zbarsky <bzbarsky@apple.com>
Date: Wed, 21 Feb 2024 13:03:41 -0500
Subject: [PATCH] Improve "need a custom toolchain" message to log more
 information. (#32239)

Logging what gn thinks is going on for the host/target OS and cpu can help
diagnose why we didn't find toolchain in the big if cascade.
---
 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 9d2f17d1acf86e..01626726e0b9af 100644
--- a/build/config/BUILDCONFIG.gn
+++ b/build/config/BUILDCONFIG.gn
@@ -127,7 +127,9 @@ if (_chip_defaults.custom_toolchain != "") {
            "Unsupported target_cpu: ${current_cpu}. Shall be arm for webOS")
   }
 } else {
-  assert(false, "No toolchain specified, please specify custom_toolchain")
+  assert(
+      false,
+      "No toolchain specified, please specify custom_toolchain for host_os='${host_os}', target_os='${target_os}', host_cpu='${host_cpu}', target_cpu='${target_cpu}'")
 }
 
 set_default_toolchain(_default_toolchain)