[Bug libstdc++/58196] New: std::align is missing

[Bug libstdc++/58196] New: std::align is missing

[augustorighetto at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58196

            Bug ID: 58196
           Summary: std::align is missing
           Product: gcc
           Version: 4.8.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: augustorighetto at gmail dot com

g++ 4.8.1 can't find std::align in <memory>.
----
$ g++ --version
g++ (Ubuntu 4.8.1-2ubuntu1~12.04) 4.8.1
Copyright (C) 2013 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.
----
#include <cstdlib>
#include <iostream>
#include <memory>

int main(int argc, char* argv[]) {
    float* f = nullptr;
    size_t space = 10;
    if (std::align(2, sizeof(float), f, space)) {
        std::cout << "yes" << std::endl;
    } else {
        std::cout << "no" << std::endl;
    }
    return EXIT_SUCCESS;
}
----
$ g++ -o foo -std=c++11 Main.cpp
Main.cpp: In function ‘int main(int, char**)’:
Main.cpp:8:9: error: ‘align’ is not a member of ‘std’
     if (std::align(2, sizeof(float), f, space)) {
         ^
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/58178] variant function name was used for user defined constructor
Date: Mon, 19 Aug 2013 19:52:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idX178

--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
But we can't reproduce the issue on x86_64-linux. My grep gives:

0000000000400742 W _ZN4baseC1Ev
0000000000400742 W _ZN4baseC2Ev

are you on linux? Please provide information about your target, otherwise this
issue will be closed very soon.

[Bug libstdc++/58196] std::align is missing

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58196

Paolo Carlini <paolo.carlini at oracle dot com> changed:

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

--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Yes. But the implementation status table clearly says NO:

  http://gcc.gnu.org/onlinedocs/libstdc++/manual/status.html#status.iso.2011

and generally we don't use Bugzilla to track unimplemented features.

[Bug libstdc++/58196] std::align is missing

[augustorighetto at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58196

--- Comment #2 from Augusto Righetto <augustorighetto at gmail dot com> ---
Hi Paolo,

    I apologize for filling a bug for an unimplemented feature.
    However, if you take a look at
http://gcc.gnu.org/gcc-4.8/cxx0x_status.html, you'll see that "Alignment
support" is marked as available on GCC 4.8.
    Having two different tables to track down features is confusing.

Thanks,

Augusto