############################################################################
# apps/tools/Wasm.mk
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.  The
# ASF licenses this file to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance with the
# License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
# License for the specific language governing permissions and limitations
# under the License.
#
############################################################################

# Only build wasm if one of the following runtime is enabled

ifneq ($(CONFIG_INTERPRETERS_WAMR)$(CONFIG_INTERPRETERS_WASM)$(CONFIG_INTERPRETERS_TOYWASM),)
include $(APPDIR)$(DELIM)tools$(DELIM)WASI-SDK.defs
include $(APPDIR)$(DELIM)interpreters$(DELIM)wamr$(DELIM)Toolchain.defs

# If called from $(APPDIR)/Makefile,
# Provide LINK_WASM, but only execute it when file wasm/*.wo exists

ifeq ($(CURDIR),$(APPDIR))

define LINK_WASM
	$(if $(wildcard $(APPDIR)$(DELIM)wasm$(DELIM)*), \
	  $(foreach bin,$(wildcard $(APPDIR)$(DELIM)wasm$(DELIM)*.wo), \
	    $(eval INITIAL_MEMORY=$(shell echo $(notdir $(bin)) | cut -d'#' -f2)) \
	    $(eval STACKSIZE=$(shell echo $(notdir $(bin)) | cut -d'#' -f3)) \
	    $(eval PROGNAME=$(shell echo $(notdir $(bin)) | cut -d'#' -f1)) \
	    $(eval WLDFLAGS=$(shell cat $(APPDIR)$(DELIM)wasm$(DELIM)$(PROGNAME).ldflags)) \
	    $(eval RETVAL=$(shell $(WCC) $(bin) $(WBIN) $(WCFLAGS) $(WLDFLAGS) $(WCC_COMPILER_RT_LIB) \
	        -Wl,--Map=$(APPDIR)$(DELIM)wasm$(DELIM)$(PROGNAME).map \
	        -o $(BINDIR)$(DELIM)wasm$(DELIM)$(PROGNAME).wasm || echo 1;)) \
	    $(if $(RETVAL), \
	        $(error wasm build failed for $(PROGNAME).wasm) \
	    ) \
		$(call WAMR_AOT_COMPILE) \
	   ) \
	 )
endef

endif # CURDIR

# Default values for WASM_BUILD, it's a three state variable:
#   y - build wasm module only
#   n - don't build wasm module, default
#   both - build wasm module and native module

ifneq ($(WASM_BUILD),n)

WASM_INITIAL_MEMORY ?= 65536
STACKSIZE           ?= $(CONFIG_DEFAULT_TASK_STACKSIZE)
PRIORITY            ?= SCHED_PRIORITY_DEFAULT

# Wamr mode:
# INT: Interpreter (Default)
# AOT: Ahead-of-Time
# XIP: Execution In Place
# JIT: Just In Time

WAMR_MODE ?= INT

# Targets follow

.PRECIOUS: $(WBIN)

WSRCS := $(MAINSRC) $(CSRCS)
WOBJS := $(WSRCS:=$(SUFFIX).wo)

# Copy math.h from $(TOPDIR)/include/nuttx/lib/math.h to $(APPDIR)/include/wasm/math.h
# Using declaration of math.h is OK for Wasm build

$(APPDIR)$(DELIM)include$(DELIM)wasm$(DELIM)math.h:
ifeq ($(CONFIG_LIBM),)
	$(call COPYFILE,$(TOPDIR)$(DELIM)include$(DELIM)nuttx$(DELIM)lib$(DELIM)math.h,$@)
endif

all:: $(WBIN)

$(BINDIR)/wasm:
	$(Q) mkdir -p $(BINDIR)/wasm

depend:: $(APPDIR)$(DELIM)include$(DELIM)wasm$(DELIM)math.h $(BINDIR)/wasm

$(WOBJS): %.c$(SUFFIX).wo : %.c
	$(Q) $(WCC) $(WCFLAGS) -c $^ -o $@

$(WBIN): $(WOBJS)
	$(shell mkdir -p $(APPDIR)/wasm)
	$(Q) flock $(WBIN).lock -c '$(WAR) $@ $(filter-out $(MAINSRC:=$(SUFFIX).wo),$^)'
	$(foreach main,$(MAINSRC), \
	  $(eval progname=$(strip $(PROGNAME_$(main:=$(SUFFIX)$(OBJEXT))))) \
	  $(eval dstname=$(shell echo $(main:=$(SUFFIX).wo) | sed -e 's/\//_/g')) \
	  $(shell cp -rf $(strip $(main:=$(SUFFIX).wo)) \
	    $(strip $(APPDIR)/wasm/$(progname)#$(WASM_INITIAL_MEMORY)#$(STACKSIZE)#$(PRIORITY)#$(WAMR_MODE)#$(dstname)) \
	   ) \
	  $(shell echo $(WLDFLAGS) > $(APPDIR)/wasm/$(progname).ldflags) \
	 )

clean::
	$(call DELFILE, $(WOBJS))
	$(call DELFILE, $(WBIN))
	$(call DELFILE, $(APPDIR)$(DELIM)include$(DELIM)wasm$(DELIM)math.h)

endif # WASM_BUILD

endif # CONFIG_INTERPRETERS_WAMR || CONFIG_INTERPRETERS_WASM || CONFIG_INTERPRETERS_TOYWASM