如何在php Opensuse中添加扩展名

I want to add an extension so I can use my own function in php for example my codes of C but I don't know the requisites and instructions of doing it.I have php5 and OS:Opensuse 11. I don't know about configure and the codes in shell there should be something like ext_skel so I can create config files but I don't have it should I download it from somewhere?I want to add an extension so I can use my own