From a827a8ad5a7b2ffdd83c0eeba82ec7468df321f9 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Wed, 5 Dec 2018 18:13:17 +0100
Subject: support static analysis of stack usage

---
 src/arch/arduino-nano/Makefile.inc | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'src/arch/arduino-nano')

diff --git a/src/arch/arduino-nano/Makefile.inc b/src/arch/arduino-nano/Makefile.inc
index b057680..28bbead 100644
--- a/src/arch/arduino-nano/Makefile.inc
+++ b/src/arch/arduino-nano/Makefile.inc
@@ -9,15 +9,21 @@ cpu_freq ?= 16000000
 COMMON_FLAGS += -Werror=overflow
 COMMON_FLAGS += -mmcu=${MCU} -DMULTIPASS_ARCH_arduino_nano
 COMMON_FLAGS += -DF_CPU=${cpu_freq}UL
-COMMON_FLAGS += -flto
 COMMON_FLAGS += -DMULTIPASS_ARCH_HAS_I2C
 
+ifeq (${stack_usage}, )
+	COMMON_FLAGS += -flto
+endif
+
 CC = avr-gcc
 CXX = avr-g++
 NM = avr-nm
 OBJCOPY = avr-objcopy
 OBJDUMP = avr-objdump
 
+# On each function call, the 2-Byte return address is pushed onto the stack
+ARCH_CALL_COST = 2
+
 ifeq (${aspectc}, 1)
 	CXX = ag++ -r build/repo.acp -v 0 --c_compiler avr-g++ -p . --Xcompiler
 endif
-- 
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