fix use new Makefile

.gitignore

@@ -18,4 +18,5 @@ _build
 .idea
 *.iml
 rebar3.crashdump
-.*#
+.*#
+*.so

c_src/Makefile

@@ -1,33 +1,74 @@
-OTPROOT=/usr/lib/erlang
-INCLUDES = -I/usr/lib/erlang/usr/include
+# Based on c_src.mk from erlang.mk by Loic Hoguin <[email protected]>
 
-# OS X flags.
-#GCCFLAGS = -O3 -fPIC -bundle -flat_namespace -undefined suppress -fno-common -Wall
+CURDIR := $(shell pwd)
+BASEDIR := $(abspath $(CURDIR)/..)
 
-# Linux Flags
-GCCFLAGS = -O3 -fPIC -shared -fno-common -Wall
+PROJECT ?= $(notdir $(BASEDIR))
+PROJECT := $(strip $(PROJECT))
 
-CFLAGS = $(GCCFLAGS) $(INCLUDES)
-CFLAGS_32=-m32
-LDFLAGS = $(CFLAGS) $(LIBS)
+ERTS_INCLUDE_DIR ?= $(shell erl -noshell -s init stop -eval "io:format(\"~ts/erts-~ts/include/\", [code:root_dir(), erlang:system_info(version)]).")
+ERL_INTERFACE_INCLUDE_DIR ?= $(shell erl -noshell -s init stop -eval "io:format(\"~ts\", [code:lib_dir(erl_interface, include)]).")
+ERL_INTERFACE_LIB_DIR ?= $(shell erl -noshell -s init stop -eval "io:format(\"~ts\", [code:lib_dir(erl_interface, lib)]).")
 
-#OBJECTS = curve25519-donna.o curve25519-donna-c64.o curve25519_donna_nif.c
+C_SRC_DIR = $(CURDIR)
+C_SRC_OUTPUT ?= $(CURDIR)/../priv/$(PROJECT).so
 
-DRIVER = curve25519_donna_nif.so curve25519_donna_c64_nif.so
-BEAM = curve25519.beam
+# System type and C compiler/flags.
 
-all: $(DRIVER) $(BEAM)
+UNAME_SYS := $(shell uname -s)
+ifeq ($(UNAME_SYS), 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 ($(UNAME_SYS), FreeBSD)
+	CC ?= cc
+	CFLAGS ?= -O3 -std=c99 -finline-functions -Wall -Wmissing-prototypes
+	CXXFLAGS ?= -O3 -finline-functions -Wall
+else ifeq ($(UNAME_SYS), Linux)
+	CC ?= gcc
+	CFLAGS ?= -O3 -std=c99 -finline-functions -Wall -Wmissing-prototypes
+	CXXFLAGS ?= -O3 -finline-functions -Wall
+endif
 
-clean: 
-	rm -f *.o *.beam *.so
+CFLAGS += -fPIC -I $(ERTS_INCLUDE_DIR) -I $(ERL_INTERFACE_INCLUDE_DIR)
+CXXFLAGS += -fPIC -I $(ERTS_INCLUDE_DIR) -I $(ERL_INTERFACE_INCLUDE_DIR)
 
-curve25519_donna_nif.so: curve25519-donna.c curve25519_donna_nif.c
-	gcc -o $@ $^ $(LDFLAGS) $(CFLAGS_32)
+LDLIBS += -L $(ERL_INTERFACE_LIB_DIR) -lei
+LDFLAGS += -shared
 
-curve25519_donna_c64_nif.so: curve25519-donna-c64.c curve25519_donna_nif.c
-	gcc -o $@ $^ $(LDFLAGS)
+# Verbosity.
 
-$(BEAM): curve25519.erl
-	erlc $^
+c_verbose_0 = @echo " C     " $(?F);
+c_verbose = $(c_verbose_$(V))
 
-# EOF
+cpp_verbose_0 = @echo " CPP   " $(?F);
+cpp_verbose = $(cpp_verbose_$(V))
+
+link_verbose_0 = @echo " LD    " $(@F);
+link_verbose = $(link_verbose_$(V))
+
+SOURCES := $(shell find $(C_SRC_DIR) -type f \( -name "*.c" -o -name "*.C" -o -name "*.cc" -o -name "*.cpp" \))
+OBJECTS = $(addsuffix .o, $(basename $(SOURCES)))
+
+COMPILE_C = $(c_verbose) $(CC) $(CFLAGS) $(CPPFLAGS) -c
+COMPILE_CPP = $(cpp_verbose) $(CXX) $(CXXFLAGS) $(CPPFLAGS) -c
+
+$(C_SRC_OUTPUT): $(OBJECTS)
+	@mkdir -p $(BASEDIR)/priv/
+	$(link_verbose) $(CC) $(OBJECTS) $(LDFLAGS) $(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:
+	@rm -f $(C_SRC_OUTPUT) $(OBJECTS)