From b7bd19f1d3ef1a00ed40e8dc14e76c8646a5757c Mon Sep 17 00:00:00 2001
From: Agnimitra sasaru <158492301+HyphenAlpha456@users.noreply.github.com>
Date: Wed, 29 Apr 2026 14:47:31 +0000
Subject: [PATCH] build: clean previous compiled files after menuconfig updates

Fixes #16151. Compares .config state before and after kconfig-mconf and triggers 'make clean' if the configuration was modified to prevent orphaned object files.

Signed-off-by: Agnimitra sasaru <158492301+HyphenAlpha456@users.noreply.github.com>
---
 tools/Unix.mk | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/Unix.mk b/tools/Unix.mk
index f25c323831f8f..14073d01e096a 100644
--- a/tools/Unix.mk
+++ b/tools/Unix.mk
@@ -746,7 +746,10 @@ olddefconfig:
 menuconfig:
 	$(Q) $(MAKE) clean_context
 	$(Q) $(MAKE) apps_preconfig
+	$(Q) cp .config .config.tmp 2>/dev/null || true
 	$(Q) ${KCONFIG_ENV} ${KCONFIG_MENUCONFIG}
+	$(Q) cmp -s .config .config.tmp || $(MAKE) clean
+	$(Q) rm -f .config.tmp
 
 nconfig: apps_preconfig
 	$(Q) $(MAKE) clean_context