From 6f076dbe1ae3b2755c7e5b13aaa51738ab4282d1 Mon Sep 17 00:00:00 2001
From: adamdunkels <adamdunkels>
Date: Wed, 19 Jan 2011 07:24:37 +0000
Subject: [PATCH] A set of compiler options that reduce the size of the final
 code size and RAM usage with ~10%. Courtesy of Simon Duquennoy.

---
 cpu/msp430/Makefile.msp430 | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/cpu/msp430/Makefile.msp430 b/cpu/msp430/Makefile.msp430
index 1be540eb9..8b7988e8d 100644
--- a/cpu/msp430/Makefile.msp430
+++ b/cpu/msp430/Makefile.msp430
@@ -1,4 +1,4 @@
-# $Id: Makefile.msp430,v 1.33 2010/08/24 16:23:20 joxe Exp $
+# $Id: Makefile.msp430,v 1.34 2011/01/19 07:24:37 adamdunkels Exp $
 
 ifdef nodeid
 CFLAGS += -DNODEID=$(nodeid)
@@ -24,7 +24,6 @@ CONTIKI_TARGET_SOURCEFILES += $(MSP430) \
 
 CONTIKI_SOURCEFILES        += $(CONTIKI_TARGET_SOURCEFILES)
 
-
 ### Compiler definitions
 CC       = msp430-gcc
 LD       = msp430-gcc
@@ -41,6 +40,14 @@ CFLAGSNO = -Wall -mmcu=$(MCU) -g $(CFLAGSWERROR)
 CFLAGS  += $(CFLAGSNO) -Os
 LDFLAGS += -mmcu=$(MCU) -Wl,-Map=contiki-$(TARGET).map
 
+
+### These flags can reduce the code size and RAM usage with up to 10%
+if SMALL
+CFLAGS += -ffunction-sections
+LDFLAGS += -Wl,--gc-sections,--undefined=_reset_vector__,--undefined=InterruptVectors,--undefined=_copy_data_init__,--undefined=_clear_bss_init__,--undefined=_end_of_init__
+endif # SMALL
+
+
 PROJECT_OBJECTFILES += ${addprefix $(OBJECTDIR)/,$(CONTIKI_TARGET_MAIN:.c=.o)}
 
 ### Compilation rules