GCC 4.8.5 No default memory alignment number

[郭文峰（Gerald Kwok）]

Hello, I just found my gcc did't have default memory alignment number. Can you give me a explain, I will realld appreciate it. Thanks you.
That's my blog which I metion the default memory alignment number.
https://blog.csdn.net/weixin_42678507/article/details/90109173