From fc19701ec4319255f2f46415ee632822c3b706b9 Mon Sep 17 00:00:00 2001
From: XANTRONIX Development <dev@xantronix.com>
Date: Mon, 6 Jun 2016 19:58:39 -0500
Subject: [PATCH] Ask gcc nicely to aggresively remove unwanted functions from
 output

---
 avr/Makefile | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/avr/Makefile b/avr/Makefile
index e368e72..46b910a 100644
--- a/avr/Makefile
+++ b/avr/Makefile
@@ -7,8 +7,9 @@ HEADER_SUBDIR	= tabby
 CROSS		= avr-
 
 CC		= $(CROSS)gcc
-CFLAGS		= $(CGFLAGS) -Wall -Os -mmcu=atmega2560 -I$(INCLUDE_PATH) \
-		  -DF_CPU=$(CLOCK_SPEED) -DUSE_2X
+CFLAGS		= $(CGFLAGS) -Wall -Os -mmcu=atmega2560 \
+		  -fdata-sections -ffunction-sections -Wl,--gc-sections \
+		  -I$(INCLUDE_PATH) -DF_CPU=$(CLOCK_SPEED) -DUSE_2X
 LDFLAGS		=
 
 OBJCOPY		= $(CROSS)objcopy