# Makefile for Linux targets

# See mix.exs for environment expectations
ifeq ($(ERL_EI_INCLUDE_DIR),)
$(error ERL_EI_INCLUDE_DIR not set. Invoke via mix or set it manually)
endif

# Set Erlang-specific compile and linker flags
ERL_CFLAGS ?= -I$(ERL_EI_INCLUDE_DIR)
ERL_LDFLAGS?= -L$(ERL_EI_LIBDIR) -lei

LIBCLIXIR = priv/libclixir$(MIX_TARGET).a

# Work-around for nerves not setting $(AR) during cross-compile
# https://github.com/nerves-project/nerves/issues/297
ifneq ($(CROSSCOMPILE),)
AR = $(CROSSCOMPILE)-ar
endif

default: priv compile priv/clixir_support.h

compile: $(LIBCLIXIR)

priv:
	mkdir priv

$(LIBCLIXIR): c_src/clixir_support.c c_src/clixir_support.h
	LANG=C $(CC) -c $(CFLAGS) \
    -Ic_src $(ERL_CFLAGS) \
    -o /tmp/clixir_support.o $<
	$(AR) rcs $@ /tmp/clixir_support.o

priv/clixir_support.h: c_src/clixir_support.h
	cp $< $@