Index: boot/Makefile.build
===================================================================
--- boot/Makefile.build	(revision a2da43ce0270f2b1188a5e2ba61783c8c4e3bb13)
+++ boot/Makefile.build	(revision 362948106914d0c4117845a63ad433052f3c1980)
@@ -61,4 +61,11 @@
 	GCC_CFLAGS += -Werror
 	ICC_CFLAGS += -Werror
+endif
+
+ifeq ($(CONFIG_LINE_DEBUG),y)
+	GCC_CFLAGS += -g
+	ICC_CFLAGS += -g
+	SUNCC_CFLAGS += -g
+	CLANG_CFLAGS += -g
 endif