-Os for some stm boards

dhalbert · dhalbert · commit 2dee1904c7ef · 2026-02-17T13:09:45.000-05:00
diff --git a/ports/stm/boards/stm32f411ce_blackpill_with_flash/mpconfigboard.mk b/ports/stm/boards/stm32f411ce_blackpill_with_flash/mpconfigboard.mk
@@ -9,6 +9,7 @@ EXTERNAL_FLASH_DEVICES = GD25Q16C,W25Q16JVxQ,W25Q64FV,W25Q32JVxQ,W25Q64JVxQ
 LONGINT_IMPL = MPZ
 
 INTERNAL_FLASH_FILESYSTEM = 0
+OPTIMIZATION_FLAGS = -Os
 
 MCU_SERIES = F4
 MCU_VARIANT = STM32F411xE
diff --git a/ports/stm/mpconfigport.mk b/ports/stm/mpconfigport.mk
@@ -10,6 +10,10 @@ ifeq ($(MCU_VARIANT),$(filter $(MCU_VARIANT),STM32F405xx STM32F407xx))
         USB_NUM_ENDPOINT_PAIRS = 4
 endif
 
+ifeq ($(INTERNAL_FLASH_FILESYSTEM),1)
+  OPTIMIZATION_FLAGS ?= -Os
+endif
+
 ifeq ($(MCU_VARIANT),STM32F407xx)
         UF2_FAMILY_ID ?= 0x6d0922fa
 endif
