Optimize ulab for size on samd51/same51

Author: jepler

ports/atmel-samd/mpconfigport.mk

@@ -106,6 +106,7 @@ CIRCUITPY_PS2IO ?= 1
 CIRCUITPY_RGBMATRIX ?= $(CIRCUITPY_FRAMEBUFFERIO)
 CIRCUITPY_SAMD ?= 1
 CIRCUITPY_SYNTHIO_MAX_CHANNELS = 12
+CIRCUITPY_ULAB_OPTIMIZE_SIZE ?= 1
 CIRCUITPY_WATCHDOG ?= 1
 
 endif # samd51
@@ -131,6 +132,7 @@ CIRCUITPY_SAMD ?= 1
 CIRCUITPY_FLOPPYIO ?= $(CIRCUITPY_FULL_BUILD)
 CIRCUITPY_FRAMEBUFFERIO ?= $(CIRCUITPY_FULL_BUILD)
 CIRCUITPY_RGBMATRIX ?= $(CIRCUITPY_FRAMEBUFFERIO)
+CIRCUITPY_ULAB_OPTIMIZE_SIZE ?= 1
 
 endif # same51
 ######################################################################

py/circuitpy_mpconfig.mk

@@ -559,6 +559,9 @@ CFLAGS += -DCIRCUITPY_ZLIB=$(CIRCUITPY_ZLIB)
 CIRCUITPY_ULAB ?= $(CIRCUITPY_FULL_BUILD)
 CFLAGS += -DCIRCUITPY_ULAB=$(CIRCUITPY_ULAB)
 
+# whether to use -Os optimization on files in ulab
+CIRCUITPY_ULAB_OPTIMIZE_SIZE ?= 0
+
 # CIRCUITPY_VIDEOCORE is handled in the broadcom tree.
 # Only for Broadcom chips.
 # Assume not a Broadcom build.

py/py.mk

@@ -57,6 +57,9 @@ ULAB_SRCS := $(shell find $(TOP)/extmod/ulab/code -type f -name "*.c")
 SRC_MOD += $(patsubst $(TOP)/%,%,$(ULAB_SRCS))
 CFLAGS_MOD += -DCIRCUITPY_ULAB=1 -DMODULE_ULAB_ENABLED=1 -DULAB_HAS_USER_MODULE=0 -iquote $(TOP)/extmod/ulab/code
 $(BUILD)/extmod/ulab/code/%.o: CFLAGS += -Wno-missing-declarations -Wno-missing-prototypes -Wno-unused-parameter -Wno-float-equal -Wno-sign-compare -Wno-cast-align -Wno-shadow -DCIRCUITPY
+ifeq ($(CIRCUITPY_ULAB_OPTIMIZE_SIZE),1)
+$(BUILD)/extmod/ulab/code/%.o: CFLAGS += -Os
+endif
 endif
 
 # py object files