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Subject: Re: [OMPI devel] Fwd: [OMPI users] missing link option for openmpi-1.8.2rc2 on Linux
From: Jeff Squyres (jsquyres) (jsquyres_at_[hidden])
Date: 2014-07-25 12:29:21


Understood. I'm asking, in principle, as to whether we should use -z noexecstack for the whole thing -- i.e., is this just a good "best practice" kind of flag we should enable?

On Jul 25, 2014, at 12:02 PM, Ralph Castain <rhc_at_[hidden]> wrote:

> I think it's just libmpi_java that needs that linker flag, so it shouldn't affect anyone else
>
> On Jul 25, 2014, at 8:59 AM, Jeff Squyres (jsquyres) <jsquyres_at_[hidden]> wrote:
>
>> OMPI developers --
>>
>> Is "-z noexecstack" a linker option we should test for in configure, and use it if it works?
>>
>> Are there any side effects that could cause problems?
>>
>>
>> Begin forwarded message:
>>
>>> From: Siegmar Gross <Siegmar.Gross_at_[hidden]>
>>> Subject: [OMPI users] missing link option for openmpi-1.8.2rc2 on Linux
>>> Date: July 25, 2014 at 2:44:48 AM EDT
>>> To: <users_at_[hidden]>
>>> Reply-To: Siegmar Gross <Siegmar.Gross_at_[hidden]>, Open MPI Users <users_at_[hidden]>
>>>
>>> Hi,
>>>
>>> I installed openmpi-1.8.2rc2 on "openSUSE Linux 12.1 x86_64"
>>> with Sun C 5.12 and get the following warning if I run a small
>>> Java program. I get no warning for my gcc-4.9.0 version of
>>> openmpi-1.8.2rc2.
>>>
>>>
>>> linpc1 java 109 mpiexec -np 1 java InitFinalizeMain
>>> Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library
>>> /usr/local/openmpi-1.8.2_64_cc/lib64/libmpi_java.so.1.2.0 which
>>> might have disabled stack guard. The VM will try to fix the stack
>>> guard now.
>>> It's highly recommended that you fix the library with
>>> 'execstack -c <libfile>', or link it with '-z noexecstack'.
>>> Hello!
>>> linpc1 java 110
>>>
>>>
>>> I would be grateful if somebody can add the link option
>>> '-z noexecstack' to omit the warning. Thank you very much for
>>> your help in advance.
>>>
>>>
>>> Kind regards
>>>
>>> Siegmar
>>>
>>> _______________________________________________
>>> users mailing list
>>> users_at_[hidden]
>>> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users
>>> Link to this post: http://www.open-mpi.org/community/lists/users/2014/07/24871.php
>>
>>
>> --
>> Jeff Squyres
>> jsquyres_at_[hidden]
>> For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
>>
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>> Link to this post: http://www.open-mpi.org/community/lists/devel/2014/07/15267.php
>
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-- 
Jeff Squyres
jsquyres_at_[hidden]
For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/