#---------------------------------------------------------------------------------
.SUFFIXES:
#---------------------------------------------------------------------------------

ifeq ($(strip $(DEVKITPRO)),)
$(error "Please set DEVKITPRO in your environment. export DEVKITPRO=<path to>/devkitpro")
endif

TOPDIR ?= $(CURDIR)
include $(DEVKITPRO)/libnx/switch_rules

AMSBRANCH := $(shell git symbolic-ref --short HEAD)
AMSREV := $(AMSBRANCH)-$(shell git rev-parse --short HEAD)

ifneq (, $(strip $(shell git status --porcelain 2>/dev/null)))
    AMSREV := $(AMSREV)-dirty
endif

#---------------------------------------------------------------------------------
# TARGET is the name of the output
# BUILD is the directory where object files & intermediate files will be placed
# SOURCES is a list of directories containing source code
# DATA is a list of directories containing data files
# INCLUDES is a list of directories containing header files
# EXEFS_SRC is the optional input directory containing data copied into exefs, if anything this normally should only contain "main.npdm".
#---------------------------------------------------------------------------------
TARGET		:=	$(notdir $(CURDIR))
BUILD		:=	build
SOURCES		:=	source
DATA		:=	data
INCLUDES	:=	include ../../common/include
EXEFS_SRC	:=	exefs_src

DEFINES	:= -DATMOSPHERE_GIT_BRANCH=\"$(AMSBRANCH)\" -DATMOSPHERE_GIT_REV=\"$(AMSREV)\"

#---------------------------------------------------------------------------------
# options for code generation
#---------------------------------------------------------------------------------
ARCH	:=	-march=armv8-a -mtune=cortex-a57 -mtp=soft -fPIE

CFLAGS	:=	-g -Wall -O2 -ffunction-sections \
			$(ARCH) $(DEFINES)

CFLAGS	+=	$(INCLUDE) -D__SWITCH__

CXXFLAGS	:= $(CFLAGS) -fno-rtti -fno-exceptions -std=gnu++17

CXXWRAPS := -Wl,--wrap,__cxa_pure_virtual \
			-Wl,--wrap,__cxa_throw \
			-Wl,--wrap,__cxa_rethrow \
			-Wl,--wrap,__cxa_allocate_exception \
			-Wl,--wrap,__cxa_free_exception \
			-Wl,--wrap,__cxa_begin_catch \
			-Wl,--wrap,__cxa_end_catch \
			-Wl,--wrap,__cxa_call_unexpected \
			-Wl,--wrap,__cxa_call_terminate \
			-Wl,--wrap,__gxx_personality_v0 \
			-Wl,--wrap,_Unwind_Resume \
			-Wl,--wrap,_ZSt19__throw_logic_errorPKc \
			-Wl,--wrap,_ZSt20__throw_length_errorPKc \
			-Wl,--wrap,_ZNSt11logic_errorC2EPKc

ASFLAGS	:=	-g $(ARCH)
LDFLAGS	=	-specs=$(DEVKITPRO)/libnx/switch.specs -g $(ARCH) $(CXXWRAPS) -Wl,-Map,$(notdir $*.map)

LIBS	:= -lstratosphere -lnx

#---------------------------------------------------------------------------------
# list of directories containing libraries, this must be the top level containing
# include and lib
#---------------------------------------------------------------------------------
LIBDIRS	:= $(PORTLIBS) $(LIBNX) $(CURDIR)/../libstratosphere


#---------------------------------------------------------------------------------
# no real need to edit anything past this point unless you need to add additional
# rules for different file extensions
#---------------------------------------------------------------------------------
ifneq ($(BUILD),$(notdir $(CURDIR)))
#---------------------------------------------------------------------------------

export OUTPUT	:=	$(CURDIR)/$(TARGET)
export TOPDIR	:=	$(CURDIR)

export VPATH	:=	$(foreach dir,$(SOURCES),$(CURDIR)/$(dir)) \
			$(foreach dir,$(DATA),$(CURDIR)/$(dir))

export DEPSDIR	:=	$(CURDIR)/$(BUILD)

CFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c)))
CPPFILES	:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp)))
SFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s)))
BINFILES	:=	$(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*)))

#---------------------------------------------------------------------------------
# use CXX for linking C++ projects, CC for standard C
#---------------------------------------------------------------------------------
ifeq ($(strip $(CPPFILES)),)
#---------------------------------------------------------------------------------
	export LD	:=	$(CC)
#---------------------------------------------------------------------------------
else
#---------------------------------------------------------------------------------
	export LD	:=	$(CXX)
#---------------------------------------------------------------------------------
endif
#---------------------------------------------------------------------------------

export OFILES	:=	$(addsuffix .o,$(BINFILES)) \
			$(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o)

export INCLUDE	:=	$(foreach dir,$(INCLUDES),-I$(CURDIR)/$(dir)) \
			$(foreach dir,$(LIBDIRS),-I$(dir)/include) \
			-I$(CURDIR)/$(BUILD)

export LIBPATHS	:=	$(foreach dir,$(LIBDIRS),-L$(dir)/lib)

export BUILD_EXEFS_SRC := $(TOPDIR)/$(EXEFS_SRC)

ifeq ($(strip $(CONFIG_JSON)),)
	jsons := $(wildcard *.json)
	ifneq (,$(findstring $(TARGET).json,$(jsons)))
		export APP_JSON := $(TOPDIR)/$(TARGET).json
	else
		ifneq (,$(findstring config.json,$(jsons)))
			export APP_JSON := $(TOPDIR)/config.json
		endif
	endif
else
	export APP_JSON := $(TOPDIR)/$(CONFIG_JSON)
endif

.PHONY: $(BUILD) clean all

#---------------------------------------------------------------------------------
all: $(BUILD)

$(BUILD):
	@[ -d $@ ] || mkdir -p $@
	@$(MAKE) --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile

#---------------------------------------------------------------------------------
clean:
	@echo clean ...
	@rm -fr $(BUILD) $(TARGET).nsp $(TARGET).npdm $(TARGET).nso $(TARGET).elf


#---------------------------------------------------------------------------------
else
.PHONY:	all

DEPENDS	:=	$(OFILES:.o=.d)

#---------------------------------------------------------------------------------
# main targets
#---------------------------------------------------------------------------------
all	:	$(OUTPUT).nsp

ifeq ($(strip $(APP_JSON)),)
$(OUTPUT).nsp	:	$(OUTPUT).nso
else
$(OUTPUT).nsp	:	$(OUTPUT).nso $(OUTPUT).npdm
endif

$(OUTPUT).nso	:	$(OUTPUT).elf

$(OUTPUT).elf	:	$(OFILES)

#---------------------------------------------------------------------------------
# you need a rule like this for each extension you use as binary data
#---------------------------------------------------------------------------------
%.bin.o	:	%.bin
#---------------------------------------------------------------------------------
	@echo $(notdir $<)
	@$(bin2o)

-include $(DEPENDS)

#---------------------------------------------------------------------------------------
endif
#---------------------------------------------------------------------------------------