Hi Pere, We are building against 1.0.2g by default in our CI. In XrdHttpProtocol.cc we do define couple of functions that are not available in older versions of openssl: https://github.com/xrootd/xrootd/blob/master/src/XrdHttp/XrdHttpProtocol.cc#L124-L152 Could it be that in your case there's a mismatch between _OPENSSL_VERSION_NUMBER_ and the actual library that is being linked against XRootD? Cheers, Michal -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/760#issuecomment-403029575 ######################################################################## 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