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# Makefile for building port binaries
#
# Makefile targets:
#
# all/install build and install the NIF
# clean clean build products and intermediates
#
# Variables to override:
#
# MIX_COMPILE_PATH path to the build's ebin directory
#
# CC C compiler
# CROSSCOMPILE crosscompiler prefix, if any
# CFLAGS compiler flags for compiling all C files
# ERL_CFLAGS additional compiler flags for files using Erlang header files
# ERL_EI_INCLUDE_DIR include path to ei.h (Required for crosscompile)
# ERL_EI_LIBDIR path to libei.a (Required for crosscompile)
# LDFLAGS linker flags for linking all binaries
# ERL_LDFLAGS additional linker flags for projects referencing Erlang libraries
ifeq ($(MIX_COMPILE_PATH),)
call_from_make:
mix compile
endif
PREFIX = $(MIX_COMPILE_PATH)/../priv
BUILD = $(MIX_COMPILE_PATH)/../obj
# Check that we're on a supported build platform
ifeq ($(CROSSCOMPILE),)
# Not crosscompiling, so check that we're on Linux.
ifneq ($(shell uname -s),Linux)
$(warning vintage_net only works on Linux, but crosscompilation)
$(warning is supported by defining $$CROSSCOMPILE, $$ERL_EI_INCLUDE_DIR,)
$(warning and $$ERL_EI_LIBDIR. See Makefile for details. If using Nerves,)
$(warning this should be done automatically.)
$(warning .)
$(warning Skipping C compilation unless targets explicitly passed to make.)
#DEFAULT_TARGETS = $(PREFIX)
endif
endif
DEFAULT_TARGETS ?= $(PREFIX) $(PREFIX)/to_elixir $(PREFIX)/udhcpc_handler
# Set Erlang-specific compile and linker flags
ERL_CFLAGS ?= -I$(ERL_EI_INCLUDE_DIR)
ERL_LDFLAGS = -L$(ERL_EI_LIBDIR) -lei_st
CFLAGS ?= -O2 -Wall -Wextra -Wno-unused-parameter -pedantic
CC ?= $(CROSSCOMPILE)-gcc
# Enable for debug messages
# CFLAGS += -DDEBUG
CFLAGS += -std=gnu99
all: install
install: $(BUILD) $(PREFIX) $(DEFAULT_TARGETS)
$(BUILD)/%.o: src/%.c
$(CC) -c $(ERL_CFLAGS) $(CFLAGS) -o $@ $<
$(PREFIX)/to_elixir: $(BUILD)/to_elixir.o
$(CC) $^ $(ERL_LDFLAGS) $(LDFLAGS) -o $@
$(PREFIX)/udhcpc_handler: $(BUILD)/udhcpc_handler.o
$(CC) $^ $(ERL_LDFLAGS) $(LDFLAGS) -o $@
$(PREFIX) $(BUILD):
mkdir -p $@
clean:
$(RM) $(PREFIX)/to_elixir $(PREFIX)/udhcpc_handler $(BUILD)/*.o
.PHONY: all clean calling_from_make install