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# Copyright (c) 2014-2015, Loïc Hoguin <[email protected]>
# This file is part of erlang.mk and subject to the terms of the ISC License.
.PHONY: clean-c_src distclean-c_src-env
# Configuration.
C_SRC_DIR ?= $(CURDIR)/c_src
C_SRC_ENV ?= $(C_SRC_DIR)/env.mk
C_SRC_OUTPUT ?= $(CURDIR)/priv/$(PROJECT).so
C_SRC_TYPE ?= shared
# System type and C compiler/flags.
ifeq ($(PLATFORM),darwin)
CC ?= cc
CFLAGS ?= -O3 -std=c99 -arch x86_64 -finline-functions -Wall -Wmissing-prototypes
CXXFLAGS ?= -O3 -arch x86_64 -finline-functions -Wall
LDFLAGS ?= -arch x86_64 -flat_namespace -undefined suppress
else ifeq ($(PLATFORM),freebsd)
CC ?= cc
CFLAGS ?= -O3 -std=c99 -finline-functions -Wall -Wmissing-prototypes
CXXFLAGS ?= -O3 -finline-functions -Wall
else ifeq ($(PLATFORM),linux)
CC ?= gcc
CFLAGS ?= -O3 -std=c99 -finline-functions -Wall -Wmissing-prototypes
CXXFLAGS ?= -O3 -finline-functions -Wall
endif
CFLAGS += -fPIC -I $(ERTS_INCLUDE_DIR) -I $(ERL_INTERFACE_INCLUDE_DIR)
CXXFLAGS += -fPIC -I $(ERTS_INCLUDE_DIR) -I $(ERL_INTERFACE_INCLUDE_DIR)
LDLIBS += -L $(ERL_INTERFACE_LIB_DIR) -lerl_interface -lei
# Verbosity.
c_verbose_0 = @echo " C " $(?F);
c_verbose = $(c_verbose_$(V))
cpp_verbose_0 = @echo " CPP " $(?F);
cpp_verbose = $(cpp_verbose_$(V))
link_verbose_0 = @echo " LD " $(@F);
link_verbose = $(link_verbose_$(V))
# Targets.
ifeq ($(wildcard $(C_SRC_DIR)),)
else ifneq ($(wildcard $(C_SRC_DIR)/Makefile),)
app:: app-c_src
test-build:: app-c_src
app-c_src:
$(MAKE) -C $(C_SRC_DIR)
clean::
$(MAKE) -C $(C_SRC_DIR) clean
else
ifeq ($(SOURCES),)
SOURCES := $(sort $(foreach pat,*.c *.C *.cc *.cpp,$(call core_find,$(C_SRC_DIR)/,$(pat))))
endif
OBJECTS = $(addsuffix .o, $(basename $(SOURCES)))
COMPILE_C = $(c_verbose) $(CC) $(CFLAGS) $(CPPFLAGS) -c
COMPILE_CPP = $(cpp_verbose) $(CXX) $(CXXFLAGS) $(CPPFLAGS) -c
app:: $(C_SRC_ENV) $(C_SRC_OUTPUT)
test-build:: $(C_SRC_ENV) $(C_SRC_OUTPUT)
$(C_SRC_OUTPUT): $(OBJECTS)
$(verbose) mkdir -p priv/
$(link_verbose) $(CC) $(OBJECTS) \
$(LDFLAGS) $(if $(filter $(C_SRC_TYPE),shared),-shared) $(LDLIBS) \
-o $(C_SRC_OUTPUT)
%.o: %.c
$(COMPILE_C) $(OUTPUT_OPTION) $<
%.o: %.cc
$(COMPILE_CPP) $(OUTPUT_OPTION) $<
%.o: %.C
$(COMPILE_CPP) $(OUTPUT_OPTION) $<
%.o: %.cpp
$(COMPILE_CPP) $(OUTPUT_OPTION) $<
clean:: clean-c_src
clean-c_src:
$(gen_verbose) rm -f $(C_SRC_OUTPUT) $(OBJECTS)
endif
ifneq ($(wildcard $(C_SRC_DIR)),)
$(C_SRC_ENV):
$(verbose) $(ERL) -eval "file:write_file(\"$(C_SRC_ENV)\", \
io_lib:format( \
\"ERTS_INCLUDE_DIR ?= ~s/erts-~s/include/~n\" \
\"ERL_INTERFACE_INCLUDE_DIR ?= ~s~n\" \
\"ERL_INTERFACE_LIB_DIR ?= ~s~n\", \
[code:root_dir(), erlang:system_info(version), \
code:lib_dir(erl_interface, include), \
code:lib_dir(erl_interface, lib)])), \
halt()."
distclean:: distclean-c_src-env
distclean-c_src-env:
$(gen_verbose) rm -f $(C_SRC_ENV)
-include $(C_SRC_ENV)
endif
# Templates.
define bs_c_nif
#include "erl_nif.h"
static int loads = 0;
static int load(ErlNifEnv* env, void** priv_data, ERL_NIF_TERM load_info)
{
/* Initialize private data. */
*priv_data = NULL;
loads++;
return 0;
}
static int upgrade(ErlNifEnv* env, void** priv_data, void** old_priv_data, ERL_NIF_TERM load_info)
{
/* Convert the private data to the new version. */
*priv_data = *old_priv_data;
loads++;
return 0;
}
static void unload(ErlNifEnv* env, void* priv_data)
{
if (loads == 1) {
/* Destroy the private data. */
}
loads--;
}
static ERL_NIF_TERM hello(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{
if (enif_is_atom(env, argv[0])) {
return enif_make_tuple2(env,
enif_make_atom(env, "hello"),
argv[0]);
}
return enif_make_tuple2(env,
enif_make_atom(env, "error"),
enif_make_atom(env, "badarg"));
}
static ErlNifFunc nif_funcs[] = {
{"hello", 1, hello}
};
ERL_NIF_INIT($n, nif_funcs, load, NULL, upgrade, unload)
endef
define bs_erl_nif
-module($n).
-export([hello/1]).
-on_load(on_load/0).
on_load() ->
PrivDir = case code:priv_dir(?MODULE) of
{error, _} ->
AppPath = filename:dirname(filename:dirname(code:which(?MODULE))),
filename:join(AppPath, "priv");
Path ->
Path
end,
erlang:load_nif(filename:join(PrivDir, atom_to_list(?MODULE)), 0).
hello(_) ->
erlang:nif_error({not_loaded, ?MODULE}).
endef
new-nif:
ifneq ($(wildcard $(C_SRC_DIR)/$n.c),)
$(error Error: $(C_SRC_DIR)/$n.c already exists)
endif
ifneq ($(wildcard src/$n.erl),)
$(error Error: src/$n.erl already exists)
endif
ifdef in
$(verbose) $(MAKE) -C $(APPS_DIR)/$(in)/ new-nif n=$n in=
else
$(verbose) mkdir -p $(C_SRC_DIR) src/
$(call render_template,bs_c_nif,$(C_SRC_DIR)/$n.c)
$(call render_template,bs_erl_nif,src/$n.erl)
endif
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