From 8264e3f1f857b4d7e15213ae2e144fca65899d2c Mon Sep 17 00:00:00 2001
From: Romain Goyet <romain.goyet@numworks.com>
Date: Wed, 10 Oct 2018 17:31:17 +0200
Subject: [PATCH] [build] Enable LTO for the device

---
 build/toolchain.arm-gcc.mak | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/build/toolchain.arm-gcc.mak b/build/toolchain.arm-gcc.mak
index 5549509f1..9bd156e6e 100644
--- a/build/toolchain.arm-gcc.mak
+++ b/build/toolchain.arm-gcc.mak
@@ -5,11 +5,18 @@ GDB = arm-none-eabi-gdb
 OBJCOPY = arm-none-eabi-objcopy
 SIZE = arm-none-eabi-size
 
+LTO=1
+
 ifeq ($(DEBUG),1)
 SFLAGS += -ggdb3
 else
+ifeq ($(LTO),1)
+SFLAGS += -flto
+else
 SFLAGS += -fdata-sections -ffunction-sections
 LDFLAGS += -Wl,--gc-sections
 endif
+endif
+
 SFLAGS += -mthumb -march=armv7e-m -mfloat-abi=hard -mcpu=cortex-m4 -mfpu=fpv4-sp-d16
 LDFLAGS += $(SFLAGS) -lgcc -Wl,-T,$(LDSCRIPT)