RPM Question

I frequently install stuff from sources. Usually the *.so files (or any other files) installed using the 'make install' command does not register these dependencies in the RPM database. As a result you may have some particular .so file in your LD_LIBRARY_PATH but trying to install an RPM that requires this .so file generates errors----eventhough the file is there, RPM think its not there. Question: How do I then register these kind of things with RPM? Is there a tool that can take as an input the commands executed by "make install" and create me a binary RPM? Salman SuSE 8.0 Professional