Index: Makefile
===================================================================
--- Makefile	(revision d6f9ed10266e66071cbba67dd80ce4daa9ae11a4)
+++ Makefile	(revision 4cfe69aa0cc00430379e3934cf85c7a661bf1769)
@@ -11,5 +11,5 @@
 # the hand-written assembly language code
 
-FLAGS :=		-Os -m68000 -Wall -Wextra
+FLAGS :=		-Os -m68000 -Wall -Wextra -gdwarf-4
 
 FLAGS_COM :=	$(FLAGS) -mshort -std=c99 -fleading-underscore -ffreestanding \