libc.info: va_start-trad

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Initialize variable argument list

   *Synopsis*
     #include <varargs.h>
     va_list AP;
     va_start(AP);
   *Description*
With the `varargs.h' macros, use `va_start' to initialize a data
structure AP to permit manipulating a variable argument list.  AP must
have the type VA_ALIST.
   *Returns*
`va_start' does not return a result.
   *Portability*
`va_start' is also defined as a macro in ANSI C, but the definitions
are incompatible; the ANSI version has another parameter besides AP.