update Makefile

Makefile

@@ -1,6 +1,25 @@
-all:
+CC=g++
-	g++ -O3 graphics.cpp main.cpp mandelbrot.cpp utils.cpp -o mandelbrot -lSDL2 -lSDL2_ttf -lmpfr -lgmp -fopenmp -pthread
+EXT=.cpp
-noop:
+FLAGS=-O2
-	g++ graphics.cpp main.cpp mandelbrot.cpp utils.cpp -o mandelbrot -lSDL2 -lSDL2_ttf -lmpfr -lgmp -fopenmp -pthread
+DEPFLAGS=-MD -MP
-debug:
+LIBS=-lSDL2 -lSDL2_ttf -lmpfr -lgmp -fopenmp -pthread
-	g++ graphics.cpp main.cpp mandelbrot.cpp utils.cpp -o mandelbrot -lSDL2 -lSDL2_ttf -lmpfr -lgmp -fopenmp -g -pthread
+EXEC_NAME=mandelbrot
+
+OBJDIR=obj
+
+SRC=$(wildcard *$(EXT))
+OBJS=$(patsubst %,$(OBJDIR)/%.o, $(basename $(SRC)))
+
+$(shell mkdir -p $(dir $(OBJS)) > /dev/null)
+
+$(EXEC_NAME): $(OBJS)
+	$(CC) $(FLAGS) $(LIBS) $^ -o $(EXEC_NAME)
+
+$(OBJDIR)/%.o: %$(EXT)
+	$(CC) $(FLAGS) $(DEPFLAGS) -c -o $@ $<
+
+.PHONY: clean
+clean:
+	rm -rf $(OBJDIR)
+
+-include $(SRC:$(EXT)=.d)