tune LTO on nrf

Author: dhalbert

ports/nrf/Makefile

@@ -91,13 +91,13 @@ ifeq ($(DEBUG), 1)
 else
   OPTIMIZATION_FLAGS ?= -O2 -fno-inline-functions
   CFLAGS += -DNDEBUG -ggdb3
-  # If -flto is needed, give it in OPTIMIZATION_FLAGS per board
 endif
 
 ifeq ($(NRF_DEBUG_PRINT), 1)
   CFLAGS += -DNRF_DEBUG_PRINT=1
 endif
 
+
 # option to override compiler optimization level, set in boards/$(BOARD)/mpconfigboard.mk
 CFLAGS += $(OPTIMIZATION_FLAGS)
 

ports/nrf/boards/bluemicro833/mpconfigboard.mk

@@ -45,9 +45,3 @@ CIRCUITPY_VECTORIO = 0
 CIRCUITPY_ZLIB = 0
 
 MICROPY_PY_ASYNC_AWAIT = 0
-
-SUPEROPT_GC = 0
-SUPEROPT_VM = 0
-
-# Override optimization to keep binary small
-OPTIMIZATION_FLAGS = -Os -flto -flto-partition=one

ports/nrf/boards/microbit_v2/mpconfigboard.mk

@@ -28,8 +28,3 @@ CIRCUITPY_ULAB = 0
 CIRCUITPY_USB = 0
 
 MICROPY_PY_ASYNC_AWAIT = 0
-
-# Override optimization to keep binary small
-OPTIMIZATION_FLAGS = -Os -flto -flto-partition=one
-SUPEROPT_VM = 0
-SUPEROPT_GC = 0

ports/nrf/boards/pca10100/mpconfigboard.mk

@@ -35,9 +35,3 @@ CIRCUITPY_VECTORIO = 0
 CIRCUITPY_ZLIB = 0
 
 MICROPY_PY_ASYNC_AWAIT = 0
-
-SUPEROPT_GC = 0
-SUPEROPT_VM = 0
-
-# Override optimization to keep binary small
-OPTIMIZATION_FLAGS = -Os -flto -flto-partition=one

ports/nrf/boards/simmel/mpconfigboard.mk

@@ -46,8 +46,3 @@ CIRCUITPY_ZLIB = 0
 
 # Enable micropython.native
 #CIRCUITPY_ENABLE_MPY_NATIVE = 1
-
-# Override optimization to keep binary small
-OPTIMIZATION_FLAGS = -Os -flto -flto-partition=one
-SUPEROPT_VM = 0
-SUPEROPT_GC = 0

ports/nrf/mpconfigport.mk

@@ -80,6 +80,17 @@ MCU_SUB_VARIANT = nrf52833
 SD ?= s140
 SOFTDEV_VERSION ?= 7.0.1
 
+ifeq ($(MCU_CHIP),nrf52833)
+  OPTIMIZATION_FLAGS ?= -Os -flto -flto-partition=one
+  SUPEROPT_GC ?= 0
+  SUPEROPT_VM ?= 0
+else
+  ifeq ($(INTERNAL_FLASH_FILESYSTEM),1)
+    OPTIMIZATION_FLAGS ?= -Os -flto
+  endif
+endif
+
+
 BOOT_SETTING_ADDR = 0x7F000
 NRF_DEFINES += -DNRF52833_XXAA -DNRF52833