Hi, Hao, Thanks indeed for your help! All errors are gone after using `-std=gnu++14' Have a nice day, Dingjun -----Original Message----- From: LIU Hao <lh_mouse@xxxxxxx> Sent: Friday, September 1, 2023 12:11 AM To: Dingjun Chen <Dingjun.Chen@xxxxxxxxxxxxxxxxxxx>; gcc-help@xxxxxxxxxxx Subject: Re: help with error: reference to 'byte' is ambiguous External Email Warning: Do not click any links or open any attachments unless you trust the sender and know the content is safe. From Geotech IT.