c++/10470: anonymous variadic macros were introduced in C99 warning at pch using

[wanderer@rsu.ru]

>Number:         10470
>Category:       c++
>Synopsis:       anonymous variadic macros were introduced in C99 warning at pch using
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          rejects-legal
>Submitter-Id:   net
>Arrival-Date:   Wed Apr 23 21:46:01 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     wanderer@rsu.ru
>Release:        3.4 20030423 (experimental)
>Organization:
>Environment:
FreeBSD 4.7-RELEASE-p9
>Description:
simple test.c test.h files compile without using pch
and generate strange warning if use test.h.gch

All case with options: g++ -ansi -pedantic -Werror -Winvalid-pch

-test.h----8<-----------
#include<string>
-test.h---->8-----------

-test.cc---8<-----------
#include"test.h"

int main() {
  return 0;
}
-test.cc--->8-----------

Warning generated at line in concept_check.h:52 :

#define __glibcpp_function_requires(...)
>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: