ERLANG_PATH = $(shell erl -eval 'io:format("~s", [lists:concat([code:root_dir(), "/erts-", erlang:system_info(version), "/include"])])' -s init stop -noshell)
CFLAGS = -g -O3 -pedantic -Wall -Wextra -I$(ERLANG_PATH) -fPIC
CXX=g++
AUTORECONF=echo "autoreconf is not available"
AUTORECONF_CMD := $(shell command -v autoreconf 2> /dev/null)

all:
ifdef AUTORECONF_CMD
    AUTORECONF=autoreconf --force --install
endif

all:

ifneq ($(OS),Windows_NT)
	ifeq ($(shell uname),Darwin)
		LDFLAGS += -dynamiclib -undefined dynamic_lookup
	endif
endif

FARMHASH_OBJS = farmhash/src/.libs/farmhash.o

FARMHASH_LIB = farmhash/src/.libs/libfarmhash.a

NIF_SRC= c_src/farmhash_nif.c

priv/lib_farmhash.so: clean
	$(MAKE) build_lib >/dev/null
	$(CXX) $(CFLAGS) -shared $(OPTIONS) \
		$(FARMHASH_OBJS) \
		$(NIF_SRC) \
		-o $@ 2>&1 >/dev/null

build_lib:
	cd farmhash && \
	$(AUTORECONF) && \
	./configure && \
	make clean && \
	./configure && \
	make all

clean:
	@$(RM) -r priv/*