To avoid dependence on which particular version of gcc is installed
under what name, the *.src.c files are preprocessed (with gcc -E) to
form the *.c files, which are then considered constant.

See MAKE-C

We vary the source programs because there have been historical
problems with contour handling after compound expressions in
declarations.  

We test the following:
	normal varargs (no compound expressions)
	sparc varargs 
		following compound with a declaration
		following compound is empty
	i860 varargs
		following compound with a statement (no declaration)
		following with a declaration (with a compound expression)
		following with a declaration (no compound expr)

