Create the Patch

BePorter? will apply the patch in the directory where the source package was extracted. For this to work, you need to create the patch like this:

1. Place the directory (for example, named xyz-1.0.0) containing the original sources in a directory of your liking
2. Place the directory containing the patched sources in the same directory. You'll need to rename it first, of course (say xyz-1.0.0-beos
3. Now create the patch with

   diff -Naur xyz-1.0.0 xyz-1.0.0-beos > xyz-1.0.0.patch
   

Don't forget to clean your sources directories first (make distclean, for example).

Congratulations! The generated patch is BePorter? compatible.