finish tests for strlen and makefile works

Makefile

@@ -14,11 +14,12 @@ SRCS = $(addprefix $(SRCS_DIR)/, $(SRCS_NAMES))
 
 OBJS = $(addprefix $(OBJS_DIR)/, $(SRCS_NAMES:.s=.o))
 
+FLAGS = -felf64
+
 all: $(NAME)
 	
 test: test.c $(NAME)
-	gcc -o test.o -c test.c
-	ld tests.c -L. -lasm
+	clang -z noexecstack test.c $(NAME) -o test
 
 $(NAME): $(OBJS_DIR) $(OBJS)
 	ar rcs $@ $(OBJS)
@@ -27,7 +28,7 @@ $(OBJS_DIR):
 	mkdir -p $(OBJS_DIR)
 
 $(OBJS_DIR)/%.o: $(SRCS_DIR)/%.s
-	nasm -o $@ $<
+	nasm $(FLAGS) -o $@ $<
 
 clean:
 	rm -rf $(OBJS_DIR)