From bfdfabab0fbe46846fb3e4be581091c6fe195356 Mon Sep 17 00:00:00 2001
From: Ronald <ronald@bto.grundel>
Date: Sat, 31 Oct 2020 23:09:23 +0100
Subject: [PATCH] Optimize compilation and garbage-collect unused
 sections(functions)

---
 RaspberryPi_JetsonNano/c/Makefile | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/RaspberryPi_JetsonNano/c/Makefile b/RaspberryPi_JetsonNano/c/Makefile
index 2b6ad80..201509e 100644
--- a/RaspberryPi_JetsonNano/c/Makefile
+++ b/RaspberryPi_JetsonNano/c/Makefile
@@ -17,12 +17,13 @@ DEBUG = -D DEBUG
 USELIB_RPI = USE_WIRINGPI_LIB
 # USELIB_RPI = USE_DEV_LIB
 
+LIB_RPI=-Wl,--gc-sections
 ifeq ($(USELIB_RPI), USE_BCM2835_LIB)
-    LIB_RPI = -lbcm2835 -lm 
+    LIB_RPI += -lbcm2835 -lm 
 else ifeq ($(USELIB_RPI), USE_WIRINGPI_LIB)
-    LIB_RPI = -lwiringPi -lm 
+    LIB_RPI += -lwiringPi -lm 
 else ifeq ($(USELIB_RPI), USE_DEV_LIB)
-    LIB_RPI = -lm 
+    LIB_RPI += -lm 
 endif
 DEBUG_RPI = -D $(USELIB_RPI) -D RPI
 
@@ -42,7 +43,7 @@ JETSON: JETSON_DEV JETSON_epd
 
 TARGET = epd
 CC = gcc
-MSG = -g -O0 -Wall
+MSG = -g -O -ffunction-sections -fdata-sections -Wall
 CFLAGS += $(MSG)
 
 RPI_epd:${OBJ_O}