Greetings - I'm experimenting with log4cxx and qserv but have run into swig-related difficulties. After locally installing log4cxx within a qserv instance, I am able to use it without trouble in stand-alone programs. When I include calls to log4cxx within qserv, however, I receive the following error when attempting to start qserv_master: Traceback (most recent call last): File "/u1/bchick/sandbox2/mystuff/qserv/master/dist/startQserv.py", line 36, in <module> from lsst.qserv.master.appTest import TestAppFunctions File "/u1/bchick/src/mystuff/master/dist/lsst/qserv/master/__init__.py", line 26, in <module> from masterLib import * File "/u1/bchick/src/mystuff/master/dist/lsst/qserv/master/masterLib.py", line 25, in <module> _masterLib = swig_import_helper() File "/u1/bchick/src/mystuff/master/dist/lsst/qserv/master/masterLib.py", line 21, in swig_import_helper _mod = imp.load_module('_masterLib', fp, pathname, description) ImportError: /u1/bchick/src/mystuff/master/dist/lsst/qserv/master/_masterLib.so: undefined symbol: _ZTIN7log4cxx7helpers13ObjectPtrBaseE For context, I made the following code changes (note: this version of qserv is pre- new modular layout). I added the following includes to the top of AsyncQueryManager.cc: #include <log4cxx/logger.h> #include <log4cxx/consoleappender.h> #include <log4cxx/simplelayout.h> #include <log4cxx/logmanager.h> And added the following lines to the AsyncQueryManager::add() function: log4cxx::LoggerPtr logger(log4cxx::Logger::getLogger("Qserv")); LOG4CXX_INFO(logger, "EXECUTING AsyncQueryManager::add()") And that's it. I believe the correctness of this code is beside the point. The problem appears to be that the log4cxx library, located within %QSERV_BASE_DIR%/lib is not being linked to. I seem to be missing one or more steps in my attempt to incorporate a new library into qserv. Any clues? Thanks in advance, Bill ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the QSERV-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=QSERV-L&A=1