From a71c329cfb0d40c853ddff6c943aed22e34b71a6 Mon Sep 17 00:00:00 2001
From: raiden00pl <raiden00@railab.me>
Date: Fri, 21 Aug 2026 10:10:18 +0200
Subject: [PATCH] netutils/paho_mqtt: configure embedded runtime mode

Expose the upstream HIGH_PERFORMANCE mode through
CONFIG_LIB_MQTT5_HIGH_PERFORMANCE and enable it by default. This keeps
normal embedded builds lightweight while allowing developers to restore
Paho heap and call-stack diagnostics when investigating library issues.

Signed-off-by: raiden00pl <raiden00@railab.me>
Assisted-by: OpenAI Codex:gpt-5
---
 netutils/paho_mqtt/CMakeLists.txt | 5 +++++
 netutils/paho_mqtt/Kconfig        | 9 +++++++++
 netutils/paho_mqtt/Makefile       | 5 +++++
 3 files changed, 19 insertions(+)

diff --git a/netutils/paho_mqtt/CMakeLists.txt b/netutils/paho_mqtt/CMakeLists.txt
index f76d20de4..a098c0993 100644
--- a/netutils/paho_mqtt/CMakeLists.txt
+++ b/netutils/paho_mqtt/CMakeLists.txt
@@ -117,6 +117,11 @@ if(CONFIG_LIB_MQTT5)
 
   target_compile_options(mqtt5 PRIVATE ${MQTT5_FLAGS})
 
+  if(CONFIG_LIB_MQTT5_HIGH_PERFORMANCE)
+    target_compile_definitions(mqtt5 PRIVATE HIGH_PERFORMANCE=1)
+    target_compile_options(mqtt5 PRIVATE -Wno-unused-but-set-variable)
+  endif()
+
   if(CONFIG_UTILS_MQTT5)
 
     set(MQTT_PUB_FLAGS
diff --git a/netutils/paho_mqtt/Kconfig b/netutils/paho_mqtt/Kconfig
index 454ed869d..48273c08f 100644
--- a/netutils/paho_mqtt/Kconfig
+++ b/netutils/paho_mqtt/Kconfig
@@ -16,6 +16,15 @@ config LIB_MQTT5_THREAD_STACKSIZE
 	---help---
 		Stack size used by threads created by the Paho MQTT library.
 
+config LIB_MQTT5_HIGH_PERFORMANCE
+	bool "Enable Paho high-performance mode"
+	default y
+	depends on LIB_MQTT5
+	---help---
+		Disable Paho heap-allocation tracking and function call-stack
+		tracing to reduce runtime and memory overhead. Disable this option
+		when debugging the Paho MQTT library.
+
 config UTILS_MQTT5
 	tristate "Enable mqtt5 tool"
 	depends on LIB_MQTT5
diff --git a/netutils/paho_mqtt/Makefile b/netutils/paho_mqtt/Makefile
index 325a68f85..5a9575824 100644
--- a/netutils/paho_mqtt/Makefile
+++ b/netutils/paho_mqtt/Makefile
@@ -38,6 +38,11 @@ CFLAGS += $(INCDIR_PREFIX)$(SRCDIR)
 
 ifeq ($(CONFIG_LIB_MQTT5), y)
 
+ifeq ($(CONFIG_LIB_MQTT5_HIGH_PERFORMANCE),y)
+CFLAGS += -DHIGH_PERFORMANCE=1
+CFLAGS += -Wno-unused-but-set-variable
+endif
+
 # Check if paho_mqtt directory exists, if not download and extract
 ifeq ($(wildcard $(PAHO_MQTT_UNPACK)/src),)
 $(PAHO_MQTT_ZIP):