Thanx, that was the probelm, dblib-dev was not installed. Which leads me to a suggestion: As it is general policy to include most features of squid doing a plain "./configure", which also includes _all_ external auth helpers, configure should also check for _all_ dependencies to be satisfied. Obviously silently ext_session_acl is not built, in case dblib-dev is missing. I consider this not very consequent. Alternative: Change the very generous policy of including almost everything just to the opposite, to a "minimalistic" default "./configure". And then do appropiate checking for dependencies. This might also help to trace down some bugs, as the squid having this bugs has a minimal set of code modules included. -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/How-to-build-ext-session-acl-tp4666258p4666265.html Sent from the Squid - Users mailing list archive at Nabble.com.