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nerves_runtime

0.4.3
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Small, general runtime utilities for Nerves devices

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nerves_runtime Makefile
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Makefile 

# Variables to override

#

# 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



# 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 nerves_runtime 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 = priv

    endif

endif

DEFAULT_TARGETS ?= priv priv/uevent



# Look for the EI library and header files

# For crosscompiled builds, ERL_EI_INCLUDE_DIR and ERL_EI_LIBDIR must be

# passed into the Makefile.

ifeq ($(ERL_EI_INCLUDE_DIR),)

ERL_ROOT_DIR = $(shell erl -eval "io:format(\"~s~n\", [code:root_dir()])" -s init stop -noshell)

ifeq ($(ERL_ROOT_DIR),)

   $(error Could not find the Erlang installation. Check to see that 'erl' is in your PATH)

endif

ERL_EI_INCLUDE_DIR = "$(ERL_ROOT_DIR)/usr/include"

ERL_EI_LIBDIR = "$(ERL_ROOT_DIR)/usr/lib"

endif



# Set Erlang-specific compile and linker flags

ERL_CFLAGS ?= -I$(ERL_EI_INCLUDE_DIR)

ERL_LDFLAGS ?= -L$(ERL_EI_LIBDIR) -lei



LDFLAGS += -lmnl

CFLAGS ?= -O2 -Wall -Wextra -Wno-unused-parameter -pedantic

CC ?= $(CROSSCOMPILE)-gcc



# Enable for debug messages

# CFLAGS += -DDEBUG



CFLAGS += -std=gnu99



.PHONY: all clean



all: $(DEFAULT_TARGETS)



%.o: %.c

	$(CC) -c $(ERL_CFLAGS) $(CFLAGS) -o $@ $<



priv:

	mkdir -p priv



priv/uevent: src/uevent.o src/erlcmd.o

	$(CC) $^ $(ERL_LDFLAGS) $(LDFLAGS) -o $@



clean:

	rm -f priv/uevent src/*.o