tune LTO on nrf

Author: dhalbert

ports/nrf/Makefile

@@ -84,14 +84,23 @@ INC += -I../../lib/mp-readline
 INC += -I../../lib/tinyusb/src
 INC += -I../../supervisor/shared/usb
 
+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
+
 #Debugging/Optimization
 ifeq ($(DEBUG), 1)
   CFLAGS += -ggdb3
   OPTIMIZATION_FLAGS = -Og
 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)

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