[Bug c++/36107] New: weak constructor product unvalid asm

[Bug c++/36107] New: weak constructor product unvalid asm

[william dot fink at gmail dot com]

When using __attribute__((weak)) on a constructor, the produced assembly file
contains an extra *INTERNAL* on the constructor declaration line.

- Here is my test code:

class Test {
  public:
  Test() __attribute__((weak));
};

int test() {
  Test test;
}

- The compilation output:
$ g++ test.cc 
/tmp/cchKRpYD.s: Assembler messages:
/tmp/cchKRpYD.s:22: Error: junk at end of line, first unrecognized character is
`*'

- The corresponding asm line 22:
        .weak   _ZN4TestC1Ev *INTERNAL*

I have tried this with and it does not work for:
- gcc (GCC) 4.3.0 (compiled from sources)
- gcc-4.2 (GCC) 4.2.1 (Ubuntu 4.2.1-5ubuntu4)
- gcc-4.1 (GCC) 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2)

It works without problems with:
- gcc-3.4 (GCC) 3.4.6 (Ubuntu 3.4.6-6ubuntu2)

If I manually remove the '*INTERNAL*' from the asm file, it compiles correctly.

I found a similar old bug (6418) from the GCC3.04 version


-- 
           Summary: weak constructor product unvalid asm
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: william dot fink at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36107

[Bug c++/36107] weak constructor product unvalid asm

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2008-05-05 05:10 -------
Even if the code assembled for 3.3.6 or 3.4.x, the weak reference was not being
emitted.  So this is not a regression really.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2008-05-05 05:10:15
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36107

[Bug c++/36107] weak constructor product unvalid asm

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36107

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|gcc-bugs at gcc dot gnu.org |
      Known to work|                            |4.5.4, 4.7.0, 4.8.0
      Known to fail|                            |

--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-10-11 14:14:11 UTC ---
Fixed a looong time ago, 4_5-branch is fine. I'm adding the testcase and
closing the PR.

[Bug c++/36107] weak constructor product unvalid asm

[paolo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36107

--- Comment #3 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> 2012-10-11 14:38:00 UTC ---
Author: paolo
Date: Thu Oct 11 14:37:44 2012
New Revision: 192361

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=192361
Log:
2012-10-11  Paolo Carlini  <paolo.carlini@oracle.com>

    PR c++/36107
    * g++.dg/ext/weak5.C: New.

Added:
    trunk/gcc/testsuite/g++.dg/ext/weak5.C
Modified:
    trunk/gcc/testsuite/ChangeLog