Yes, a library would be the cleanest way to go. Except that it would require a good amount of changes. Currently, all we need to do to include the filtering software in a project is to copy a source file and a header file into the project, and write a simple configuration file. That works for all of our platforms and build environments. (Actually, this is what can be done in about a week. So far, we need to change the source file for each project.)

I'll rely on gcc optimizing away unused functions, and disable the warnings for the compare functions that may be unused. (Re^2: [OT] Abusing the C preprocessor).

Alexander