SRC := $(shell find src -name '*.c')
HDR := $(shell find src -name '*.h')
OBJ := $(patsubst src/%.c,obj/%.o,$(SRC))
DEP := $(patsubst src/%.c,dep/%.d,$(SRC))
PKG_CONFIG ?= pkg-config
STRIP ?= strip

TARGET := my-project
VERSION = $(shell git describe --long --all --dirty)

LIBS = freeglut glu
LINK = -lm -ldl $(shell $(PKG_CONFIG) --libs $(LIBS)) $(LDFLAGS

FLAGS = \
	-DVERSION=\"$(VERSION)\" -O2 \
	-Wall -Wextra -Wno-parentheses -Wno-unused-parameter \
	$(shell $(PKG_CONFIG) --cflags $(LIBS)) \
	$(CFLAGS)

$(TARGET): $(OBJ)
	@printf "(LD) "
	$(CC) $(OBJ) $(LINK) -o $@

$(TARGET)-strip: $(TARGET)
	@printf "(STRIP) "
	$(STRIP) -o $@ $<

obj/%.o: src/%.c
	@mkdir -p $(dir $@)
	@printf "(CC) "
	$(CC) $(FLAGS) -o $@ -c $<

dep/%.d: src/%.c $(HDR)
	@mkdir -p $(dir $@)
	@printf "(DEP) $@\n"
	@$(CC) $(FLAGS) -o $@ -MT $(patsubst src/%.c,obj/%.o,$<) -MM $<

ifeq ($(filter clean,$(MAKECMDGOALS)),)
-include $(DEP)
endif

.PHONY: clean
clean:
	rm -f $(TARGET) $(TARGET)-strip
	rm -rf obj dep