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

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

include $(DEVKITPRO)/libnx/switch_rules

#---------------------------------------------------------------------------------
# TARGET is the name of the output
# 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
#---------------------------------------------------------------------------------
TARGET      :=  $(notdir $(CURDIR))
SOURCES     :=  source source/app source/gl source/imgui source/2d
DATA        :=  data
INCLUDES    :=  include

#---------------------------------------------------------------------------------
# options for code generation
#---------------------------------------------------------------------------------
ARCH    :=  -march=armv8-a -mtune=cortex-a57 -mtp=soft -fPIC -ftls-model=local-exec

CFLAGS  :=  -g -Wall -Werror \
            -ffunction-sections \
            -fdata-sections \
            -Wno-unknown-pragmas \
            $(ARCH) \
            $(BUILD_CFLAGS)

CFLAGS  +=  $(INCLUDE) $(DEBUGFLAG) -D__SWITCH__ -DIMGUI_IMPL_OPENGL_LOADER_GLAD -DIMGUI_INCLUDE_IMGUI_USER_H \
            -D_GLIBCXX_USE_C99_MATH_TR1 -D_LDBL_EQ_DBL -DGLM_FORCE_PURE

CXXFLAGS    := $(CFLAGS) -fno-rtti -fno-exceptions

ASFLAGS :=  -g $(ARCH)

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

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

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_BIN   :=  $(addsuffix .o,$(BINFILES))
export OFILES_SRC   :=  $(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o)
export OFILES   :=  $(OFILES_BIN) $(OFILES_SRC)
export HFILES   :=  $(addsuffix .h,$(subst .,_,$(BINFILES)))

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

.PHONY: clean all

#---------------------------------------------------------------------------------
all: lib/lib$(TARGET).a lib/lib$(TARGET)d.a

lib:
    @[ -d $@ ] || mkdir -p $@

release:
    @[ -d $@ ] || mkdir -p $@

debug:
    @[ -d $@ ] || mkdir -p $@

lib/lib$(TARGET).a : lib release $(SOURCES) $(INCLUDES)
    @$(MAKE) BUILD=release OUTPUT=$(CURDIR)/$@ \
    BUILD_CFLAGS="-DNDEBUG=1 -O2" \
    DEPSDIR=$(CURDIR)/release \
    --no-print-directory -C release \
    -f $(CURDIR)/Makefile

lib/lib$(TARGET)d.a : lib debug $(SOURCES) $(INCLUDES)
    @$(MAKE) BUILD=debug OUTPUT=$(CURDIR)/$@ \
    BUILD_CFLAGS="-DDEBUG=1 -Og" \
    DEPSDIR=$(CURDIR)/debug \
    --no-print-directory -C debug \
    -f $(CURDIR)/Makefile

dist-bin: all
    @tar --exclude=*~ -cjf lib$(TARGET).tar.bz2 include lib

dist-src:
    @tar --exclude=*~ -cjf lib$(TARGET)-src.tar.bz2 include source Makefile

dist: dist-src dist-bin

#---------------------------------------------------------------------------------
clean:
    @echo clean ...
    @rm -fr release debug lib *.bz2

#---------------------------------------------------------------------------------
else

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

#---------------------------------------------------------------------------------
# main targets
#---------------------------------------------------------------------------------
$(OUTPUT)   :   $(OFILES)

$(OFILES_SRC)   : $(HFILES)

#---------------------------------------------------------------------------------
%_bin.h %.bin.o :   %.bin
#---------------------------------------------------------------------------------
    @echo $(notdir $<)
    @$(bin2o)


-include $(DEPENDS)

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