udpcast-20120424-4 has -s in LDFLAGS again, Makefile.in has changed so that the sed in the specfile no longer does its job. While fixing it, I suggest converting that stuff to a patch so it's less likely to break silently in the future. Also while at it, Makefile.in adds -O6 to CFLAGS which is bogus anyway, and the rationale for doing/allowing that should be documented in the specfile. http://fedoraproject.org/wiki/Packaging:Guidelines#Compiler_flags
If I'm reading the man page right, '-s' in LDFLAGS will strip the binary, which obviously we don't want to do because debuginfo will be empty. Do you want to just make these changes?
Sure, can do.
http://pkgs.fedoraproject.org/cgit/udpcast.git/commit/?id=2aa71e8 (Took the liberty to make a few other cosmetic changes while at it.)