From 9c5553fbd041724c09f5e602be4b37f5bc61b1d7 Mon Sep 17 00:00:00 2001
From: Tomasz Kramkowski <tk@the-tk.com>
Date: Sun, 28 May 2017 20:33:43 +0100
Subject: uart: Make the uart module optional

Making the uart module optional makes an -Os compile much smaller.
---
 Makefile | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'Makefile')

diff --git a/Makefile b/Makefile
index ea5d872..ef5ba35 100644
--- a/Makefile
+++ b/Makefile
@@ -17,12 +17,17 @@ CFLAGS = -std=c11 $(WARNINGS) -O2 -flto -MMD -MP -ffreestanding -nostdlib
 LDFLAGS = -T layout.ld -O2 -flto -ffreestanding -nostdlib
 ASFLAGS = $(TARGET_ARCH)
 
-OBJ := vectors.o flashconf.o crt0.o setup.o fmk.o lib/le.o pit.o uart.o \
-	usb/endpt0.o usb/endpt1.o usb/txhandler.o usb/usb.o
+OBJ := vectors.o flashconf.o crt0.o setup.o fmk.o lib/le.o pit.o \
+	usb/endpt0.o usb/endpt1.o usb/txhandler.o usb/usb.o weak.o
 
 include $(MK20DX256)/mk20dx256.mk
 CPPFLAGS += $(mk20dx256_CPPFLAGS)
 
+ifeq ("$(WITH_UART)", "yes")
+	CPPFLAGS += -DWITH_UART
+	OBJ += uart.o
+endif
+
 %.bin: %
 	$(OBJCOPY) -O binary $< $@
 
-- 
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