Disable debugging by default

Some issues with pointer conversion will be reported (due to a missing
macro call). For now, let's just set -Wno-error for that.

Makefile

@@ -3,6 +3,10 @@ export PYTHONPATH := $(PWD)/tools/nrfutil:$(PWD)/tools/intelhex:$(PYTHONPATH)
 PYTHON ?= python3
 PYTEST ?= pytest-3
 
+# Disable debugging to save some space
+DEBUG ?= 0
+CFLAGS_EXTRA ?= -Wno-error=incompatible-pointer-types
+
 all : bootloader reloader micropython
 
 # If BOARD is undefined then set it up so that expanding it issues an
@@ -67,6 +71,7 @@ micropython: build-$(BOARD_SAFE) wasp/boards/$(BOARD_SAFE)/watch.py micropython/
 		BOARD=$(BOARD) SD=s132 \
 		MICROPY_VFS_LFS2=1 \
 		FROZEN_MANIFEST=$(PWD)/wasp/boards/$(BOARD)/manifest.py \
+		DEBUG=$(DEBUG) CFLAGS_EXTRA=$(CFLAGS_EXTRA) \
 		USER_C_MODULES=$(PWD)/wasp/modules
 	$(PYTHON) -m nordicsemi dfu genpkg \
 		--dev-type 0x0052 \