# where py object files go (they have a name prefix to prevent filename clashes)
PY_BUILD = $(BUILD)/py

# where autogenerated header files go
HEADER_BUILD = $(BUILD)/genhdr

# file containing qstr defs for the core Python bit
PY_QSTR_DEFS = $(PY_SRC)/qstrdefs.h

TRANSLATION ?= en_US

# If qstr autogeneration is not disabled we specify the output header
# for all collected qstrings.
ifneq ($(QSTR_AUTOGEN_DISABLE),1)
QSTR_DEFS_COLLECTED = $(HEADER_BUILD)/qstrdefs.collected.h
endif

# Any files listed by these variables will cause a full regeneration of qstrs
# DEPENDENCIES: included in qstr processing; REQUIREMENTS: not included
QSTR_GLOBAL_DEPENDENCIES += $(PY_SRC)/mpconfig.h mpconfigport.h
QSTR_GLOBAL_REQUIREMENTS += $(HEADER_BUILD)/mpversion.h

# some code is performance bottleneck and compiled with other optimization options
CSUPEROPT = -O3

# Enable building 32-bit code on 64-bit host.
ifeq ($(MICROPY_FORCE_32BIT),1)
CC += -m32
CXX += -m32
LD += -m32
endif

# External modules written in C.
ifneq ($(USER_C_MODULES),)
# pre-define USERMOD variables as expanded so that variables are immediate
# expanded as they're added to them
SRC_USERMOD :=
SRC_USERMOD_CXX :=
CFLAGS_USERMOD :=
CXXFLAGS_USERMOD :=
LDFLAGS_USERMOD :=
$(foreach module, $(wildcard $(USER_C_MODULES)/*/micropython.mk), \
    $(eval USERMOD_DIR = $(patsubst %/,%,$(dir $(module))))\
    $(info Including User C Module from $(USERMOD_DIR))\
	$(eval include $(module))\
)

SRC_MOD += $(patsubst $(USER_C_MODULES)/%.c,%.c,$(SRC_USERMOD))
SRC_MOD_CXX += $(patsubst $(USER_C_MODULES)/%.cpp,%.cpp,$(SRC_USERMOD_CXX))
CFLAGS_MOD += $(CFLAGS_USERMOD)
CXXFLAGS_MOD += $(CXXFLAGS_USERMOD)
LDFLAGS_MOD += $(LDFLAGS_USERMOD)
endif

ifeq ($(CIRCUITPY_ULAB),1)
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 -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
endif

# py object files
PY_CORE_O_BASENAME = $(addprefix py/,\
	mpstate.o \
	nlr.o \
	nlrx86.o \
	nlrx64.o \
	nlrthumb.o \
	nlrpowerpc.o \
	nlrxtensa.o \
	nlrsetjmp.o \
	malloc.o \
	gc.o \
	gc_long_lived.o \
	pystack.o \
	qstr.o \
	vstr.o \
	mpprint.o \
	unicode.o \
	mpz.o \
	reader.o \
	lexer.o \
	parse.o \
	scope.o \
	compile.o \
	emitcommon.o \
	emitbc.o \
	asmbase.o \
	asmx64.o \
	emitnx64.o \
	asmx86.o \
	emitnx86.o \
	asmthumb.o \
	emitnthumb.o \
	emitinlinethumb.o \
	asmarm.o \
	emitnarm.o \
	asmxtensa.o \
	emitnxtensa.o \
	emitinlinextensa.o \
	emitnxtensawin.o \
	formatfloat.o \
	parsenumbase.o \
	parsenum.o \
	emitglue.o \
	persistentcode.o \
	runtime.o \
	runtime_utils.o \
	scheduler.o \
	nativeglue.o \
	pairheap.o \
	ringbuf.o \
	stackctrl.o \
	argcheck.o \
	warning.o \
	profile.o \
	map.o \
	enum.o \
	obj.o \
	objarray.o \
	objattrtuple.o \
	objbool.o \
	objboundmeth.o \
	objcell.o \
	objclosure.o \
	objcomplex.o \
	objdeque.o \
	objdict.o \
	objenumerate.o \
	objexcept.o \
	objfilter.o \
	objfloat.o \
	objfun.o \
	objgenerator.o \
	objgetitemiter.o \
	objint.o \
	objint_longlong.o \
	objint_mpz.o \
	objlist.o \
	objmap.o \
	objmodule.o \
	objobject.o \
	objpolyiter.o \
	objproperty.o \
	objnone.o \
	objnamedtuple.o \
	objrange.o \
	objreversed.o \
	objset.o \
	objsingleton.o \
	objslice.o \
	objstr.o \
	objstrunicode.o \
	objstringio.o \
	objtuple.o \
	objtype.o \
	objzip.o \
	opmethods.o \
	proto.o \
	reload.o \
	sequence.o \
	stream.o \
	binary.o \
	builtinimport.o \
	builtinevex.o \
	builtinhelp.o \
	modarray.o \
	modbuiltins.o \
	modcollections.o \
	modgc.o \
	modio.o \
	modmath.o \
	modcmath.o \
	modmicropython.o \
	modstruct.o \
	modsys.o \
	moduerrno.o \
	modthread.o \
	vm.o \
	bc.o \
	showbc.o \
	repl.o \
	smallint.o \
	frozenmod.o \
	)

PY_EXTMOD_O_BASENAME = \
	extmod/moduasyncio.o \
	extmod/moductypes.o \
	extmod/modujson.o \
	extmod/modure.o \
	extmod/moduzlib.o \
	extmod/moduheapq.o \
	extmod/modutimeq.o \
	extmod/moduhashlib.o \
	extmod/modubinascii.o \
	extmod/virtpin.o \
	extmod/modurandom.o \
	extmod/moduselect.o \
	extmod/modframebuf.o \
	extmod/vfs.o \
	extmod/vfs_blockdev.o \
	extmod/vfs_reader.o \
	extmod/vfs_posix.o \
	extmod/vfs_posix_file.o \
	extmod/vfs_fat.o \
	extmod/vfs_fat_diskio.o \
	extmod/vfs_fat_file.o \
	extmod/vfs_lfs.o \
	extmod/utime_mphal.o \
	lib/embed/abort_.o \
	lib/utils/printf.o \

# prepend the build destination prefix to the py object files
PY_CORE_O = $(addprefix $(BUILD)/, $(PY_CORE_O_BASENAME))
PY_EXTMOD_O = $(addprefix $(BUILD)/, $(PY_EXTMOD_O_BASENAME))

# this is a convenience variable for ports that want core, extmod and frozen code
PY_O = $(PY_CORE_O) $(PY_EXTMOD_O)

# object file for frozen code specified via a manifest
ifneq ($(FROZEN_MANIFEST),)
PY_O += $(BUILD)/$(BUILD)/frozen_content.o
endif

# object file for frozen files
ifneq ($(FROZEN_DIR),)
PY_O += $(BUILD)/frozen.o
endif

# Combine old singular FROZEN_MPY_DIR with new multiple value form.
FROZEN_MPY_DIRS += $(FROZEN_MPY_DIR)

# object file for frozen bytecode (frozen .mpy files)
ifneq ($(FROZEN_MPY_DIRS),)
PY_O += $(BUILD)/frozen_mpy.o
endif

# Sources that may contain qstrings
SRC_QSTR_IGNORE = py/nlr%
SRC_QSTR_EMITNATIVE = py/emitn%
SRC_QSTR += $(SRC_MOD) $(filter-out $(SRC_QSTR_IGNORE),$(PY_CORE_O_BASENAME:.o=.c)) $(PY_EXTMOD_O_BASENAME:.o=.c)
# Sources that only hold QSTRs after pre-processing.
SRC_QSTR_PREPROCESSOR = $(addprefix $(TOP)/, $(filter $(SRC_QSTR_EMITNATIVE),$(PY_CORE_O_BASENAME:.o=.c)))

# Anything that depends on FORCE will be considered out-of-date
FORCE:
.PHONY: FORCE

$(HEADER_BUILD)/mpversion.h: FORCE | $(HEADER_BUILD)
	$(STEPECHO) "GEN $@"
	$(Q)$(PYTHON3) $(PY_SRC)/makeversionhdr.py $@

# build a list of registered modules for py/objmodule.c.
$(HEADER_BUILD)/moduledefs.h: $(SRC_QSTR) $(QSTR_GLOBAL_DEPENDENCIES) | $(HEADER_BUILD)/mpversion.h
	@$(STEPECHO) "GEN $@"
	$(Q)$(PYTHON3) $(PY_SRC)/makemoduledefs.py --vpath="., $(TOP), $(USER_C_MODULES)" $(SRC_QSTR) > $@

SRC_QSTR += $(HEADER_BUILD)/moduledefs.h

# mpconfigport.mk is optional, but changes to it may drastically change
# overall config, so they need to be caught
MPCONFIGPORT_MK = $(wildcard mpconfigport.mk)

$(HEADER_BUILD)/$(TRANSLATION).mo: $(TOP)/locale/$(TRANSLATION).po | $(HEADER_BUILD)
	$(Q)msgfmt -o $@ $^

$(HEADER_BUILD)/qstrdefs.preprocessed.h: $(PY_QSTR_DEFS) $(QSTR_DEFS) $(QSTR_DEFS_COLLECTED) mpconfigport.h $(MPCONFIGPORT_MK) $(PY_SRC)/mpconfig.h | $(HEADER_BUILD)
	$(STEPECHO) "GEN $@"
	$(Q)cat $(PY_QSTR_DEFS) $(QSTR_DEFS) $(QSTR_DEFS_COLLECTED) | $(SED) 's/^Q(.*)/"&"/' | $(CPP) $(CFLAGS) - | $(SED) 's/^"\(Q(.*)\)"/\1/' > $@

# qstr data
$(HEADER_BUILD)/qstrdefs.enum.h: $(PY_SRC)/makeqstrdata.py $(HEADER_BUILD)/qstrdefs.preprocessed.h
	$(STEPECHO) "GEN $@"
	$(Q)$(PYTHON3) $(PY_SRC)/makeqstrdata.py $(HEADER_BUILD)/qstrdefs.preprocessed.h > $@

# Adding an order only dependency on $(HEADER_BUILD) causes $(HEADER_BUILD) to get
# created before we run the script to generate the .h
# Note: we need to protect the qstr names from the preprocessor, so we wrap
# the lines in "" and then unwrap after the preprocessor is finished.
$(HEADER_BUILD)/qstrdefs.generated.h: $(PY_SRC)/makeqstrdata.py $(HEADER_BUILD)/$(TRANSLATION).mo $(HEADER_BUILD)/qstrdefs.preprocessed.h
	$(STEPECHO) "GEN $@"
	$(Q)$(PYTHON3) $(PY_SRC)/makeqstrdata.py --compression_filename $(HEADER_BUILD)/compression.generated.h --translation $(HEADER_BUILD)/$(TRANSLATION).mo $(HEADER_BUILD)/qstrdefs.preprocessed.h > $@

$(PY_BUILD)/qstr.o: $(HEADER_BUILD)/qstrdefs.generated.h

# Standard C functions like memset need to be compiled with special flags so
# the compiler does not optimise these functions in terms of themselves.
CFLAGS_BUILTIN ?= -ffreestanding -fno-builtin -fno-lto
$(BUILD)/lib/libc/string0.o: CFLAGS += $(CFLAGS_BUILTIN)

# Standard C functions like memset need to be compiled with special flags so
# the compiler does not optimise these functions in terms of themselves.
CFLAGS_BUILTIN ?= -ffreestanding -fno-builtin -fno-lto
$(BUILD)/lib/libc/string0.o: CFLAGS += $(CFLAGS_BUILTIN)

# Force nlr code to always be compiled with space-saving optimisation so
# that the function preludes are of a minimal and predictable form.
$(PY_BUILD)/nlr%.o: CFLAGS += -Os

# optimising gc for speed; 5ms down to 4ms on pybv2
ifndef SUPEROPT_GC
  SUPEROPT_GC = 1
endif

ifeq ($(SUPEROPT_GC),1)
$(PY_BUILD)/gc.o: CFLAGS += $(CSUPEROPT)
endif

# optimising vm for speed, adds only a small amount to code size but makes a huge difference to speed (20% faster)
ifndef SUPEROPT_VM
  SUPEROPT_VM = 1
endif

ifeq ($(SUPEROPT_VM),1)
$(PY_BUILD)/vm.o: CFLAGS += $(CSUPEROPT)
endif

# Optimizing vm.o for modern deeply pipelined CPUs with branch predictors
# may require disabling tail jump optimization. This will make sure that
# each opcode has its own dispatching jump which will improve branch
# branch predictor efficiency.
# https://marc.info/?l=lua-l&m=129778596120851
# http://hg.python.org/cpython/file/b127046831e2/Python/ceval.c#l828
# http://www.emulators.com/docs/nx25_nostradamus.htm
#-fno-crossjumping

# Include rules for extmod related code
include $(TOP)/extmod/extmod.mk