OUT=build
SRC_DIR=src
APP_DIR=src/apps/

CC=gcc

CCFLAGS = -Wall -Werror
CCFLAGS += -std=c99 -D_POSIX_C_SOURCE=200809L
CCFLAGS += -I$(SRC_DIR)

.PHONY: release debug

CONFIG = $(OUT)/.config.mk

-include $(CONFIG)

ifeq ($(DEBUG), 1)
CCFLAGS += -DLOG_LEVEL=5 -DDEBUG
CCFLAGS += -fprofile-arcs -ftest-coverage
CCFLAGS += -O0 -ggdb
LDFLAGS += -lgcov --coverage
endif

ifeq ($(RELEASE), 1)
CCFLAGS += -O3
endif

CCFLAGS += -I/usr/include/glib-2.0/ -I/usr/lib/x86_64-linux-gnu/glib-2.0/include
LDFLAGS += -lglib-2.0

C_SOURCES = $(shell find $(SRC_DIR) -name "*.c")
ALL_OBJS = $(patsubst $(SRC_DIR)/%.c, $(OUT)/%.o, $(C_SOURCES))
APP_OBJS = $(filter $(OUT)/apps/%, $(ALL_OBJS))
OBJS = $(filter-out $(APP_OBJS), $(ALL_OBJS))
APPS = $(patsubst %.o, %, $(APP_OBJS))

.PHONY: all
all: gbdb gbasm tests

.PHONY: config-debug config-release config-default
$(CONFIG):
	@mkdir -p $(OUT)
config-debug: $(CONFIG)
	@echo "DEBUG=1" > $(CONFIG)
config-release: $(CONFIG)
	@echo "RELEASE=1" > $(CONFIG)
config-default: $(CONFIG)
	@echo "" > $(CONFIG)


.PHONY: gbdb gbasm

gbdb: $(OUT)/apps/gbdb
gbasm: $(OUT)/apps/gbasm

.PHONY: gbasm-test sample-test tests

gbasm-test: $(OUT)/apps/gbasm-test
sample-test: $(OUT)/apps/sample-test
tri-test: $(OUT)/apps/tri-test
tests: gbasm-test sample-test tri-test

$(ALL_APPS) $(ALL_OBJS): $(CONFIG)

$(OUT)/%.o: $(SRC_DIR)/%.c
	@echo "     CC $@"
	@$(shell mkdir -p $(@D))
	@$(CC) -c $(CCFLAGS) -o $@ $<

.SECONDEXPANSION:
$(APPS): $(OBJS) $$@.o
	@echo "     LD $@"
	@$(shell mkdir -p $(@D))
	@$(CC) $^ $(LDFLAGS) -o $@

.PHONY: clean realclean
clean:
	@rm -f $(ALL_OBJS) $(APPS)

realclean: clean
	@rm -f $(CONFIG)