extra: Add debug config overlay.

Add debug config overlay to easily build debug images.

Usage: ./extra/build.sh <board> --debug

The build includes extra/debug.conf which enables:

- Debug mode with assertions and verbose output
- Debug-level logging (level 4)
- Stack overflow detection
- Thread monitoring
- Debug optimizations (-Og)

Signed-off-by: iabdalkader <[email protected]>

Author: iabdalkader

extra/build.sh

@@ -51,6 +51,11 @@ else
 	args="$*"
 fi
 
+# Check for debug flag and append
+if [ x$2 == x"--debug" ]; then
+	args="$args -- -DEXTRA_CONF_FILE=../extra/debug.conf"
+fi
+
 echo
 echo "Build target: $target $args"
 

extra/debug.conf

@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: Apache-2.0
+# Debug configuration for Arduino Core Zephyr
+
+# Enable debug mode
+CONFIG_DEBUG=y
+
+# Enable debug logging
+CONFIG_LOG_MODE_IMMEDIATE=y
+CONFIG_LOG_DEFAULT_LEVEL=4
+
+# Workaround for TLS credentials issue fixed upstream
+CONFIG_TLS_CREDENTIALS_LOG_LEVEL_INF=y
+
+# Enable assertions
+CONFIG_ASSERT=y
+CONFIG_ASSERT_VERBOSE=y
+
+# Enable stack overflow detection
+CONFIG_STACK_SENTINEL=y
+
+# Enable thread monitoring
+CONFIG_THREAD_MONITOR=y
+CONFIG_THREAD_NAME=y
+
+# Disable compiler optimizations
+CONFIG_DEBUG_OPTIMIZATIONS=y
+
+# Enable additional LLEXT debugging
+CONFIG_LLEXT_LOG_LEVEL_DBG=y