preprocessor name

[Wei Qin]

Hi,
	I am writing a shell script to obtain information of gcc's
preprocessor. I can obtain the path by getting the dirname of
	gcc -print-libgcc-file-name
	But I have trouble figuring out the cpp name. For gcc2.95, it is
cpp, for 3.0, it is cpp0. I am not sure if it is going to change in the
future. Is there a simple way to get the command name without assuming
the 2 possibilities?

thanks in advance.

Wei