varargs and -prototype

[Micah Altman]

In <srp.673809276 at babar.mmwb.ucsf.edu> srp at babar.mmwb.ucsf.edu (Scott R. Presnell) writes:

>	I am working on a program that uses varargs.  At the same time, but
>for other reasons, I would like to use the IRIX -prototypes argument to
>cc(1).  Is there a "correct" way to specify a prototype for a function that
>uses varargs (and have it work with -prototypes)?  So far, I am having

For variable argument length argument lists in ANSI, you should be 
using the stdarg package, not the varargs package. The prototype form for a 
variable length list is to use an ellipsis "..." after the first argument:

	type function-name(first_arg_type,...)

 
The first argument type is mandatory, I think.

So for example, the declaration for printf would be:
	
	int printf(char* fmt,...);

For more information, check the man page on stdarg(5) and look in the
Ansi C version of the Kernighan and Ritchie book, "The C Programming
Language"




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