mimxrt: Enable ROM text compression.

To reduce size of firmware, by about 3k.

ports/mimxrt/Makefile

@@ -40,6 +40,9 @@ include ../../py/mkenv.mk
 # Include micropython configuration board makefile
 include $(BOARD_DIR)/mpconfigboard.mk
 
+# MicroPython feature configurations
+MICROPY_ROM_TEXT_COMPRESSION ?= 1
+
 # File containing description of content to be frozen into firmware.
 FROZEN_MANIFEST ?= boards/manifest.py
 
@@ -290,6 +293,8 @@ SRC_QSTR += $(SRC_C) $(SHARED_SRC_C) $(GEN_PINS_SRC)
 CFLAGS += -g  # always include debug info in the ELF
 ifeq ($(DEBUG),1)
 CFLAGS += -Og
+# Disable text compression in debug builds
+MICROPY_ROM_TEXT_COMPRESSION = 0
 else
 CFLAGS += -Os -DNDEBUG
 endif

ports/mimxrt/machine_led.c

@@ -44,7 +44,7 @@ STATIC mp_obj_t led_obj_make_new(const mp_obj_type_t *type, size_t n_args, size_
 
     // Check led id is in range
     if (!(1 <= led_id && led_id <= NUM_LEDS)) {
-        mp_raise_msg_varg(&mp_type_ValueError, "LED(%d) doesn't exist", led_id);
+        mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("LED(%d) doesn't exist"), led_id);
     }
 
     // Return reference to static object

ports/mimxrt/machine_sdcard.c

@@ -67,7 +67,7 @@ STATIC mp_obj_t sdcard_obj_make_new(const mp_obj_type_t *type, size_t n_args, si
     mp_int_t sdcard_id = args[SDCARD_INIT_ARG_ID].u_int;
 
     if (!(1 <= sdcard_id && sdcard_id <= MP_ARRAY_SIZE(mimxrt_sdcard_objs))) {
-        nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "SDCard(%d) doesn't exist", sdcard_id));
+        nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("SDCard(%d) doesn't exist"), sdcard_id));
     }
 
     mimxrt_sdcard_obj_t *self = &mimxrt_sdcard_objs[(sdcard_id - 1)];