As a Matter of Fact, You Can Survive in a Cemetery!
Definitely don't eat the corpses, but...
You carry a blunt, heavy metal object. Cemeteries, especially in relatively urban areas, are frequented by mourners and kin. There was just a funeral an hour ago at the cemetery you're stranded in...
First order of business will be to stalk the place an keep on the lookout for a likely victim. Sneak up behind and while they're tidying the flowers on their loved one's grave, cosh the poor bugger with your nail puller. Make sure no one sees you when you do this!
Drag your fresh meat to some secluded place, like behind or between a couple of the big mausolems in an older part of the cemetery. Set your grill between the mausoleums and wait for dusk. Light a small fire there and grill away to your heart's content!
Be sure to clean up after yourself! Basic hygiene and all that: wash your hands at one of the water pumps after butchering & cooking and after disposing of the left-over inedible bits.
Be sure to hide away any valuables, money and good clothing for when you find a way to escape!