[Bug c++/62057] New: __builtin_offsetof works but std::offsetof doesn't

[Bug c++/62057] New: __builtin_offsetof works but std::offsetof doesn't

[igodard at pacbell dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62057

            Bug ID: 62057
           Summary: __builtin_offsetof works but std::offsetof doesn't
           Product: gcc
           Version: 4.6.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: igodard at pacbell dot net

This code:
#include    <cstddef>

class A {
public:
    int i;
    };

    int main() {
        int x = __builtin_offsetof(A, i);
        int j = std::offsetof(A, i);
        }

gets you this:

s6:~/ootbc/genAsm$ gcc foo.cc
foo.cc: In function âint main()â:
foo.cc:10:16: error: expected unqualified-id before â__builtin_offsetofâ
foo.cc:10:16: error: expected â,â or â;â before â__builtin_offsetofâ


Version:
s6:~/ootbc/genAsm$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc/4.6.4/libexec/gcc/x86_64-unknown-linux-gnu/4.6.4/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-4.6.4/configure --prefix=/usr/local/gcc/4.6.4
--libdir=/usr/local/gcc/4.6.4/lib64 --enable-languages=c,c++
Thread model: posix
gcc version 4.6.4 (GCC)
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/62057] __builtin_offsetof works but std::offsetof doesn't
Date: Fri, 08 Aug 2014 07:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idb057

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Offsetof is always a macro so it is never used with a namespace.