# Based on c_src.mk from erlang.mk by Loic Hoguin <essen@ninenines.eu>

CURDIR := $(shell pwd)
BASEDIR := $(abspath $(CURDIR)/..)

PROJECT := sqlite3_nif

# The flag combination may or may not make sense for your application.
#  YMMV, feel free to change if required.
SQLITE_CFLAGS = -DSQLITE_DOS=0 \
		-DSQLITE_THREADSAFE=1 \
		-DSQLITE_DEFAULT_MEMSTATUS=0 \
		-DSQLITE_DEFAULT_WAL_SYNCHRONOUS=1 \
		-DSQLITE_LIKE_DOESNT_MATCH_BLOBS \
		-DSQLITE_OMIT_DEPRECATED \
		-DSQLITE_OMIT_PROGRESS_CALLBACK \
		-DSQLITE_OMIT_AUTOINIT \
		-DHAVE_USLEEP \
		-DHAVE_GMTIME_R \
		-DHAVE_LOCALTIME_R \
		-DSQLITE_USE_URI \
		-DSQLITE_ENABLE_JSON1 \
		-DSQLITE_OMIT_GET_TABLE \
		-DSQLITE_ENABLE_NORMALIZE \
		-DSQLITE_ENABLE_SNAPSHOT \
		-DSQLITE_ENABLE_DESERIALIZE \
		-DSQLITE_OMIT_DEPRECATED \
		-I$(CURDIR)/sqlite3

ERTS_INCLUDE_DIR ?= $(shell erl -noshell -s init stop -eval "io:format(\"~ts/erts-~ts/include/\", [code:root_dir(), erlang:system_info(version)]).")

C_SRC_DIR = $(CURDIR)
C_SRC_OUTPUT ?= $(CURDIR)/../priv/$(PROJECT).so

# System type and C compiler/flags.

UNAME_SYS := $(shell uname -s)
ifeq ($(UNAME_SYS), Darwin)
	CC ?= cc
	CFLAGS ?= -std=c99 -arch x86_64 -finline-functions -Wall -Wmissing-prototypes
	LDFLAGS ?= -arch x86_64  -flat_namespace  -undefined suppress
else ifeq ($(UNAME_SYS), FreeBSD)
	CC ?= cc
	CFLAGS ?= -std=c99 -finline-functions -Wall -Wmissing-prototypes
	LDFLAGS ?= -shared
else ifeq ($(UNAME_SYS), Linux)
	CC ?= gcc
	CFLAGS ?= -std=c99 -finline-functions -Wall -Wmissing-prototypes
	LDFLAGS ?= -shared
endif


CFLAGS += -fPIC -I$(CURDIR) -I $(ERTS_INCLUDE_DIR) $(SQLITE_CFLAGS)

ifeq ($(RAW_SQLITE3_DEBUG), 1)
	CFLAGS += -O0 -DDEBUG -g
else
	CFLAGS += -O2
endif

COMPILE_C = $(CC) $(CFLAGS) -c

OBJECTS = sqlite3_nif.o sqlite3/sqlite3.o

$(C_SRC_OUTPUT): $(OBJECTS)
	@mkdir -p $(BASEDIR)/priv/
	$(CC) $(OBJECTS) $(LDFLAGS) -o $(C_SRC_OUTPUT)

sqlite3_nif.o: sqlite3_nif.c sqlite3/sqlite3.h
	$(COMPILE_C) $(OUTPUT_OPTION) $<

sqlite3/sqlite3.o: sqlite3/sqlite3.c
	$(COMPILE_C) $(OUTPUT_OPTION) $<

clean:
	@rm -f $(C_SRC_OUTPUT) $(OBJECTS)