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* Re: c++/6874: deriving from zero-sized objects causes extraneous padding
@ 2002-06-07 7:25 lerdsuwa
0 siblings, 0 replies; 3+ messages in thread
From: lerdsuwa @ 2002-06-07 7:25 UTC (permalink / raw)
To: gcc-bugs, gcc-prs, gnubug, nobody
Synopsis: deriving from zero-sized objects causes extraneous padding
State-Changed-From-To: open->closed
State-Changed-By: lerdsuwa
State-Changed-When: Fri Jun 7 07:25:37 2002
State-Changed-Why:
GCC 3.0 and later (with the new V3 ABI) behave like
the suggested idea.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6874
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: c++/6874: deriving from zero-sized objects causes extraneous padding
@ 2002-06-07 19:06 Charlie Skilbeck
0 siblings, 0 replies; 3+ messages in thread
From: Charlie Skilbeck @ 2002-06-07 19:06 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR c++/6874; it has been noted by GNATS.
From: "Charlie Skilbeck" <charlie@skilbeck.com>
To: <lerdsuwa@gcc.gnu.org>,
<gcc-bugs@gcc.gnu.org>,
<gcc-prs@gcc.gnu.org>,
<gnubug@skilbeck.com>,
<nobody@gcc.gnu.org>,
<gcc-gnats@gcc.gnu.org>
Cc:
Subject: Re: c++/6874: deriving from zero-sized objects causes extraneous padding
Date: Fri, 7 Jun 2002 19:04:10 -0700
Sadly, upgrading to the the beta 3.0 compiler is not an option at this stage
of our project (the mips version is unstable) - can someone point me at the
relevant source file, and I'll fix it myself...
Cheers,
Charlie.
----- Original Message -----
From: <lerdsuwa@gcc.gnu.org>
To: <gcc-bugs@gcc.gnu.org>; <gcc-prs@gcc.gnu.org>; <gnubug@skilbeck.com>;
<nobody@gcc.gnu.org>
Sent: Fri, Jun 07, 2002 7:25 AM
Subject: Re: c++/6874: deriving from zero-sized objects causes extraneous
padding
> Synopsis: deriving from zero-sized objects causes extraneous padding
>
> State-Changed-From-To: open->closed
> State-Changed-By: lerdsuwa
> State-Changed-When: Fri Jun 7 07:25:37 2002
> State-Changed-Why:
> GCC 3.0 and later (with the new V3 ABI) behave like
> the suggested idea.
>
>
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&p
r=6874
>
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* c++/6874: deriving from zero-sized objects causes extraneous padding
@ 2002-05-30 16:06 gnubug
0 siblings, 0 replies; 3+ messages in thread
From: gnubug @ 2002-05-30 16:06 UTC (permalink / raw)
To: gcc-gnats
>Number: 6874
>Category: c++
>Synopsis: deriving from zero-sized objects causes extraneous padding
>Confidential: no
>Severity: critical
>Priority: medium
>Responsible: unassigned
>State: open
>Class: change-request
>Submitter-Id: net
>Arrival-Date: Thu May 30 13:36:00 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: gnubug@skilbeck.com
>Release: 2.95.??
>Organization:
>Environment:
mips
>Description:
when deriving from a zero-sized struct, can we get the dummy single byte overlaid by the data members of the derived struct?
>How-To-Repeat:
struct Bob
{
void *operator new(size_t s);
void operator delete(void *p);
};
struct Bill : Bob
{
int Jack;
};
...
sizeof(Bob) == 1 (Fine)
sizeof(Bill) == 8 (sizeof(int) would be nice, like other compilers)
>Fix:
er... hack the gcc!?
>Release-Note:
>Audit-Trail:
>Unformatted:
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2002-06-08 2:06 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2002-06-07 7:25 c++/6874: deriving from zero-sized objects causes extraneous padding lerdsuwa
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2002-06-07 19:06 Charlie Skilbeck
2002-05-30 16:06 gnubug
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