[zorp] Building Zorp with profiling in mind

I am looking for guidance in adding profiling support to the GPL version of Zorp. Ideally, I would like to add the ability to build zorp with or without profiling based on a build time option, but don't have access to the Makefile.ac files used to generate the distributed files. Any pointers on how to approach this are greatly appreciated. Regards, Peter Meekel Xambala, Inc.