Resolve "add makefile with structure"

Closes #3 (closed)

Makefile

 CC:=gcc
-CFLAGS:= -g -Wextra -pedantic -fsanitize=address
+CFLAGS:=-g -Wall -Wextra -pedantic -fsanitize=address
+LDFLGS:=-fsanitize=address
 NAME:=stack
 
 $(NAME): main.o $(NAME).o
-    $(CC) $(CFLAGS) -o $@ $^ -lSDL2
+	$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
 
-tests: $(NAME)_tests.o $(NAME).o
-    $(CC) $(CFLAGS) -o $@ $^
+test: $(NAME)_test.o $(NAME).o
+	$(CC) $(CFLAGS) -o $@ $^
+	./test
 
 $(NAME).o: $(NAME).h
 
+.PHONY: clean
+
 clean:
-    rm -f *.o $(NAME) tests
+	rm -f *.o $(NAME) tests