Complie a "modified" FreeSwan

Dear all,

I am doing a project with FreeSwan currently, which is about adding additional functions to exisitng FreeSwan.

Of course I followed the all the official and unofficial documents when installing FreeSwan, but I would like to ask, everytime after I modified the FreeSwan source code, do I need to repeat all the steps again (recomplie kernel)?

Is it really necessary to do that as there aleady a FreeSwan exist in my system? Or is there any step it is not necessary to do it to take effect of my change in FreeSwan? If I need to repeat all the steps again and again, it would be really painful.

Thanks for any advices.

Calvin