It seems that it's a problem with RedHat's build of gcc. On Debian everything works fine with the custom semaphore and the same version of gcc. ``` ]==> gcc --version gcc (Debian 6.3.0-5) 6.3.0 20170124 ``` -- 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/458#issuecomment-278136753 ######################################################################## 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