OBJDIR=obj
.DEFAULT_GOAL=all
_DEPFILES=$(addprefix $(OUT)/.deps/, $(OBJ:.o=.d))

_PCHDRS=$(shell [ -z "$(PCPKGS)" ] || pkg-config --cflags $(PCPKGS))
_PCLIBS=$(shell [ -z "$(PCPKGS)" ] ||pkg-config --libs $(PCPKGS))

_LIBSRCHPATHS=$(addprefix -L, $(dir $(DEP)))
_LIBINCPATHS=$(addprefix -I, $(dir $(DEP))) $(_PCHDRS)
_LIBPATHS=$(addprefix -l, $(patsubst lib%.a,%,$(notdir $(DEP)))) $(_PCLIBS)

CFLAGS ?= -g -Og
CFLAGS += -Wall -Werror -Wno-unused-parameter -Wno-missing-field-initializers -Wno-sign-compare -Wno-char-subscripts
CFLAGS += -MMD -MP -MF $(OUT)/.deps/$(subst /,-,$*).d

CXXFLAGS += -std=c++14 $(CFLAGS)

LDFLAGS += -pthread -lm

OUT ?= obj
LIB ?= $(INSTLIB)
BIN ?= $(INSTBIN)

ifdef SOLIB
    CFLAGS += -fPIC
else
    CFLAGS += -fPIE
endif


Q=@

# disable implicit rules.
.SUFFIXES:
.SECONDARY:
.PHONY: clean
.PHONY: all _modversions

all: _modversions $(SOLIB:%=$(OUT)/%) $(BIN:%=$(OUT)/%) $(LIB:%=$(OUT)/%) $(EXTRA)

pkg: all
	if [ -n "$(BIN)" ]; then \
		../../buildscripts/mkpkg.sh -o $(BIN).$(ABI).mpkg -a apply.sh obj.$(ABI)/$(BIN) sv.$(BIN); \
	fi

$(OUT)/$(SOLIB): $(OBJ:%.o=$(OUT)/%.o) $(EXTRADEP) $(DEP)
	@echo SO $@
	$(Q)$(CC) -fPIC -shared -o $@ $(OBJ:%.o=$(OUT)/%.o) $(_LIBSRCHPATHS) $(_LIBPATHS) $(LDFLAGS)

$(OUT)/$(LIB): $(OBJ:%.o=$(OUT)/%.o) $(EXTRADEP) $(DEP)
	@echo AR $@
	$(Q)$(AR) -rcs $@ $(OBJ:%.o=$(OUT)/%.o)

$(OUT)/$(BIN): $(OBJ:%=$(OUT)/%) $(EXTRADEP) $(DEP)
	@echo LD $@
	$(Q)$(CC) -o $@ -fPIE -pie $(OBJ:%.o=$(OUT)/%.o) $(_LIBSRCHPATHS) $(_LIBPATHS) $(LDFLAGS) $(STATIC)

$(DEP):
	@cd $(dir $@) && $(MAKE)

clean: $(EXTRACLEAN) $(GENSRC) $(GENHDR)
	rm -rf $(OUT)
	rm -f $(EXTRACLEAN)

$(OUT)/%.o: ./%.c $(OUT)/.stamp $(GENHDR)
	@echo CC $@
	$(Q)mkdir -p $$(dirname $@)
	$(Q)$(CC) -o $@ -c $(CFLAGS) $(_LIBINCPATHS) $<

$(OUT)/%.o: ./%.cpp $(OUT)/.stamp $(GENHDR)
	@echo CX $@
	$(Q)mkdir -p $$(dirname $@)
	$(Q)$(CXX) -o $@ -c $(CXXFLAGS) $(_LIBINCPATHS) $<

$(OUT)/%.o: ./%.cc $(OUT)/.stamp $(GENHDR)
	@echo CC $@
	$(Q)mkdir -p $$(dirname $@)
	$(Q)$(CXX) -o $@ -c $(CXXFLAGS) $(_LIBINCPATHS) $<

.deps/stamp:

$(OUT)/.stamp:
	mkdir -p $(OUT)/.deps && touch $(OUT)/.stamp
	mkdir -p .deps && touch .deps/.stamp

config.mk: configure
	./configure --redo

_modversions:
	$(Q)[ -z "$(PCPKGS)" ] || pkg-config --modversion $(PCPKGS) > /dev/null


-include $(_DEPFILES)