README.Portability (Function prototypes): Document new variable-argument function macros.

	* README.Portability (Function prototypes): Document new
	variable-argument function macros.

From-SVN: r55150

1 files changed, 6 insertions, 22 deletions

diff --git a/gcc/README.Portability b/gcc/README.Portability
index d69c3869b3f..ccd05e7521d 100644
--- a/gcc/README.Portability
+++ b/gcc/README.Portability
@@ -139,32 +139,16 @@ void cpp_ice PARAMS ((cpp_reader *, const char *msgid, ...));
 
 void
 cpp_ice VPARAMS ((cpp_reader *pfile, const char *msgid, ...))
-{  
-#ifndef ANSI_PROTOTYPES
-  cpp_reader *pfile;
-  const char *msgid;
-#endif
-  va_list ap;
-  
-  VA_START (ap, msgid);
-  
-#ifndef ANSI_PROTOTYPES
-  pfile = va_arg (ap, cpp_reader *);
-  msgid = va_arg (ap, const char *);
-#endif
+{
+  VA_OPEN (ap, msgid);
+  VA_FIXEDARG (ap, cpp_reader *, pfile);
+  VA_FIXEDARG (ap, const char *, msgid);
 
   ...
-  va_end (ap);
+  VA_CLOSE (ap);
 }
 
-For the curious, here are the definitions of the above macros.  See
-ansidecl.h for the definitions of the above macros and more.
-
-#define PARAMS(paramlist)  paramlist  /* ISO C.  */
-#define VPARAMS(args)   args
-
-#define PARAMS(paramlist)  ()         /* K+R C.  */
-#define VPARAMS(args)   (va_alist) va_dcl
+See ansidecl.h for the definitions of the above macros and more.
 
 One aspect of using K+R style function declarations, is you cannot
 have arguments whose types are char, short, or float, since without