A program I'm trying to compile is simply not working right. I have everything defined the way it should with all the right #include statements there. However, anytime I try to compile with g++, it tells me the functions are undefined. Really, I should not be getting this error. I cannot find anywhere there should/could be a problem. Without posting any code, what could be causing this? I've gone through the code several times myself and checked that all the appropriate files were included where they needed to be included. I'm using g++ 4.2.1 on a Mac OS X 10.6.5 system.
(Not posting code because it's 9 files and the problem shouldn't exist. Even my professor couldn't find a problem with the code. If code is needed, I'll post it.)