Not able to locate error cpp linux-Collection of common programming errors

This maybe really stupid, but I faced the following error, while trying to compile certain code modules, using cmake

    acg_localizer_active_search.cc:(.text+0x43c6): undefined reference to            
    `ANNkd_tree::ANNkd_tree(float**, int, int, int, ANNsplitRule)'
    acg_localizer_active_search.cc:(.text+0x4441): undefined reference to    
   `ANNkd_tree::ANNkd_tree(float**, int, int, int, ANNsplitRule)'

1. Please help me to understand what this undefined reference error means.
2. The error line mentioned as ‘.text+0x…’, is not understandable. How can I locate the error.

I have been stuck for quite some time, solving error after error and have ended up here. Please help me. Thanks in advance

Sorry for not adding the code. it is around 2000 lines and am not sure where to locate this error. its part of a software package, called acg_localizer.

1. That’s a link time error. The method ANNkd_tree::ANNkd_tree(float**, int, int, int, ANNsplitRule) cannot be found in any libraries and object files specified in the link command, although it is referenced.

   You have to find out where it is defined, and make sure the library it is defined in comes after the library that uses it on the linker command line.

   You can use the nm tool to find out which symbols (= variables, methods) are defined or used by an object file or library. Do a man nm (or search on google) to find out more.

Originally posted 2013-11-09 23:12:32.