Joe: Such warning message in RELEASE build is expected. I suggest to disable them by compiler option. If so, we don’t need to modify source code. Thanks Liming 发件人: JoeX Lu 发送时间: 2023年5月5日 8:04 收件人: gaoliming ; devel@edk2.groups.io 主题: Re: [edk2-devel] 回复: [edk2-devel] [PATCH] Support GLOBAL_REMOVE_IF_UNREFERENCED in GCC5/11 Hi Liming, For question1: We might declaim some variables/functions only used in DEBUG mode and those are necessary variables/functions for debugging but will trigger warning message in RELEASE build. For question2: Yes