>Number:         22888
>Category:       toolchain
>Synopsis:       "varargs.h" (variable argument list) broken with GCC 3.3.1
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    toolchain-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Sep 22 11:55:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     
>Release:        NetBSD 1.6ZC built from 2003-09-21 sources
>Organization:
Matthias Scheler                                  http://scheler.de/~matthias/
>Environment:
System: NetBSD lyssa.zhadum.de 1.6ZC NetBSD 1.6ZC (LYSSA) #0: Sun Sep 21 15:43:26 CEST 2003 tron@lyssa.zhadum.de:/src/sys/compile/LYSSA i386
Architecture: i386
Machine: i386
>Description:
Programs using the (admittedly obsolete) variable argument list interface
via "varargs.h" cannot be compiled with GCC 3.3.1. This causes a major
portability problem which e.g. breaks the "mg2a" package.

>How-To-Repeat:
Try to compile the following (stupid and crappy) program:

#include <stdio.h>
#include <varargs.h>

static void
stupid_func(va_alist)
va_dcl
{
        va_list ap;
        char    *str;

        va_start(ap);
        while ((str = va_arg(ap, char *)) != NULL)
                (void) puts(str);
}

int
main(int argc, char **argv)
{
        stupid_func("Hello", "World", NULL);
        return 0;
}

NetBSD 1.6.1_STABLE:
tron@colwyn:~>gcc --version
2.95.3
tron@colwyn:~>gcc foobar.c -Wall -s -o foobar
tron@colwyn:~>./foobar
Hello
World

NetBSD-current:
tron@lyssa:~>gcc --version
gcc (GCC) 3.3.1
Copyright (C) 2003 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

tron@lyssa:~>gcc foobar.c -Wall -s -o foobar
foobar.c:7: error: parse error before "__builtin_va_alist_t"
foobar.c:7: warning: type defaults to `int' in declaration of `__builtin_va_alist'
foobar.c:7: warning: data definition has no type or storage class
foobar.c:12: error: parse error before '(' token
foobar.c: In function `main':
foobar.c:20: warning: implicit declaration of function `stupid_func'

>Fix:
None provided.

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