Hello! I also have the same problem and same configuration (x86_64, gcc 4.8.0), but -O flag didn't help me. I've used few variants, like: ./configure --prefix=/usr CFLAGS="-O" ./configure --prefix=/usr CFLAGS="-O0" ./configure --prefix=/usr CFLAGS="-O1" ./configure --prefix=/usr CFLAGS="-O2" ./configure --prefix=/usr CFLAGS="-O3" but heither one had helped me to get rid of the error. I have also tried compiling with gcc-4.7(from sources) (again, on x86_64), but this haven't helped either. -- View this message in context: http://postgresql.1045698.n5.nabble.com/initdb-of-pg-9-0-13-fails-on-pg-authid-tp5750773p5763623.html Sent from the PostgreSQL - general mailing list archive at Nabble.com. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general