atmel-samd: Use LTO for all builds to get 5000 bytes back on express boards.

tannewt · tannewt · commit 8d0d5defc7e0 · 2017-04-18T09:44:04.000-07:00
diff --git a/atmel-samd/Makefile b/atmel-samd/Makefile
@@ -107,6 +107,7 @@ CFLAGS_CORTEX_M0 = \
 	-ffunction-sections \
 	-fdata-sections \
 	-fshort-enums \
+	-flto \
 	-D ARM_MATH_CM0PLUS=true \
 	-DSYSTICK_MODE \
 	-DEXTINT_CALLBACK_MODE=true \
@@ -120,7 +121,7 @@ CFLAGS_CORTEX_M0 = \
 	-DTC_ASYNC=true \
 	-DUSB_DEVICE_LPM_SUPPORT \
 	--param max-inline-insns-single=500
-CFLAGS = $(INC) -Wall -Werror -std=gnu11 -nostdlib $(CFLAGS_CORTEX_M0) $(COPT) $(BOARD_CFLAGS)
+CFLAGS = $(INC) -Wall -Werror -std=gnu11 -nostdlib $(CFLAGS_CORTEX_M0) $(COPT)
 
 #Debugging/Optimization
 # TODO(tannewt): Figure out what NDEBUG does. Adding it to the debug build
diff --git a/atmel-samd/boards/arduino_zero/mpconfigboard.mk b/atmel-samd/boards/arduino_zero/mpconfigboard.mk
@@ -5,5 +5,3 @@ USB_PID = 0x824D
 FLASH_IMPL = internal_flash.c
 
 CHIP_VARIANT = SAMD21G18A
-
-BOARD_CFLAGS = -flto
diff --git a/atmel-samd/boards/feather_m0_adalogger/mpconfigboard.mk b/atmel-samd/boards/feather_m0_adalogger/mpconfigboard.mk
@@ -5,5 +5,3 @@ USB_PID = 0x8015
 FLASH_IMPL = internal_flash.c
 
 CHIP_VARIANT = SAMD21G18A
-
-BOARD_CFLAGS = -flto
diff --git a/atmel-samd/boards/feather_m0_basic/mpconfigboard.mk b/atmel-samd/boards/feather_m0_basic/mpconfigboard.mk
@@ -5,5 +5,3 @@ USB_PID = 0x8015
 FLASH_IMPL = internal_flash.c
 
 CHIP_VARIANT = SAMD21G18A
-
-BOARD_CFLAGS = -flto
diff --git a/atmel-samd/boards/gemma_m0/mpconfigboard.mk b/atmel-samd/boards/gemma_m0/mpconfigboard.mk
@@ -5,5 +5,3 @@ USB_PID = 0x8015
 FLASH_IMPL = internal_flash.c
 
 CHIP_VARIANT = SAMD21E18A
-
-BOARD_CFLAGS = -flto
diff --git a/atmel-samd/boards/trinket_m0/mpconfigboard.mk b/atmel-samd/boards/trinket_m0/mpconfigboard.mk
@@ -5,5 +5,3 @@ USB_PID = 0x8015
 FLASH_IMPL = internal_flash.c
 
 CHIP_VARIANT = SAMD21E18A
-
-BOARD_CFLAGS = -flto
