From c1fa61057c18e7d0a81ad127c67080e171f87756 Mon Sep 17 00:00:00 2001
From: Michael Zimmermann <sigmaepsilon92@gmail.com>
Date: Mon, 30 Sep 2024 21:23:09 +0200
Subject: [PATCH] cmake: modules: dts: print stderr on failure

059aae7c916 actually hid error messages completely instead of making them
more visible.
db7a3901bde restored that for some processes, but not for dtc itself.

Without this patch, a device tree error like a missing `reg` property
failed the build without showing the reason.

Signed-off-by: Michael Zimmermann <sigmaepsilon92@gmail.com>
---
 cmake/modules/dts.cmake | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmake/modules/dts.cmake b/cmake/modules/dts.cmake
index 19b168c74858e..6722c88ff5047 100644
--- a/cmake/modules/dts.cmake
+++ b/cmake/modules/dts.cmake
@@ -398,7 +398,7 @@ execute_process(
   )
 
 if(NOT "${ret}" STREQUAL "0")
-  message(FATAL_ERROR "dtc failed with return code: ${ret}")
+  message(FATAL_ERROR "dtc failed with return code: ${ret}\n${stderr}")
 elseif(stderr)
   # dtc printed warnings on stderr but did not fail.
   # Display them as CMake warnings to draw attention.