Re: c++/10790: g++/gcc

[Andrew Pinski <pinskia at physics dot uc dot edu>]

This is a GCC extension so it is not a bug, use -pedantic or 
-pedantic-errors to see that they are not accepted.
I get some warnings or errors if -pedantic-errors:

test2.cc: In function `int main()':
test2.cc:7: warning: ISO C++ forbids variable-size array `arr'
test2.cc:9: warning: ISO C++ forbids variable-size array `arr2'

Thanks,
Andrew Pinski

PS can someone close this bug as it is not really a bug but a 
misunderstanding of GCC extensions.


On Wednesday, May 14, 2003, at 13:59 US/Eastern, lgang@yahoo.com wrote:

> > Number:         10790
> > Category:       c++
> > Synopsis:       g++/gcc
> > Confidential:   no
> > Severity:       serious
> > Priority:       medium
> > Responsible:    unassigned
> > State:          open
> > Class:          sw-bug
> > Submitter-Id:   net
> > Arrival-Date:   Wed May 14 18:06:00 UTC 2003
> > Closed-Date:
> > Last-Modified:
> > Originator:     lgang@yahoo.com
> > Release:        G++ 3.2
> > Organization:
> > Environment:
> Solaris 8
> > Description:
> Should a non-constant array be allowed in C/C++? I guess not.  See the 
> following code.
>
> int main()
> {
>   int c;
>   scanf("%d", &c);
>   int arr[c];
>   int p;
>   char arr2[c];
>   int another;
>   printf ("Terrible, diff=%d, diff=%d\n",
> 			 (char*)&c-(char*)&p, (char*)&p - (char*)&another);
>   return 0;
> }
>
> Seems that compiler treats it int arr[c] as int *arr.  I don't think 
> it should compile.
>
> Thanks
> > How-To-Repeat:
>
> > Fix:
>
> > Release-Note:
> > Audit-Trail:
> > Unformatted: