lib: heap: build heap_info conditionally

Only build when needed and adapt existing users to pull this in when
needed.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

lib/heap/CMakeLists.txt

@@ -2,10 +2,10 @@
 
 zephyr_sources(
   heap.c
-  heap_info.c
   multi_heap.c
   )
 
+zephyr_sources_ifdef(CONFIG_SYS_HEAP_INFO heap_info.c)
 zephyr_sources_ifdef(CONFIG_SYS_HEAP_VALIDATE heap_validate.c)
 zephyr_sources_ifdef(CONFIG_SYS_HEAP_STRESS heap_stress.c)
 zephyr_sources_ifdef(CONFIG_SHARED_MULTI_HEAP shared_multi_heap.c)

lib/heap/Kconfig

@@ -13,11 +13,23 @@ config SYS_HEAP_VALIDATE
 	  environments that require sensitive detection of memory
 	  corruption.
 
+	  Use for testing and validation only.
+
 config SYS_HEAP_STRESS
 	bool "General purpose heap stress test"
 	help
 	  Stresses the heap.
 
+	  Use for testing and validation only.
+
+config SYS_HEAP_INFO
+	bool "Heap internal structure information"
+	help
+	  Enables support for printing heap internal structure
+	  information to the console.
+
+	  Use for debugging only.
+
 config SYS_HEAP_ALLOC_LOOPS
 	int "Number of tries in the inner heap allocation loop"
 	default 3

modules/lvgl/Kconfig.memory

@@ -26,6 +26,7 @@ choice LV_Z_MEMORY_POOL
 
 	config LV_Z_MEM_POOL_SYS_HEAP
 		bool "User space lvgl pool"
+		select SYS_HEAP_INFO
 		help
 		  Use a dedicated memory pool from a private sys heap.