OK I see in the logs: - [log in to unmask] - `The C compiler identification is AppleClang 13.0.0.13000029` - `The CXX compiler identification is AppleClang 13.0.0.13000029` On mine I have clang Apple LLVM version 10.0.1 (clang-1001.0.46.4) and it says `The default C++ language standard is gnu++14.`, could you check what is the default in your case? -- Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/1660#issuecomment-1118727767 You are receiving this because you are subscribed to this thread. Message ID: <[log in to unmask]> ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-DEV list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1