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Subject: Re: [OMPI users] Compiling OpenMPI with PGI pgc++
From: Jeff Squyres (jsquyres) (jsquyres_at_[hidden])
Date: 2014-01-29 12:24:14


Oh, I'm sorry -- I mis-read your initial mail (I thought when you did use all the PGI compilers, it worked).

I don't know the difference between pgc++ and pgcpp, unfortunately.

Do you have the latest version of your PGI compiler suite in that series?

On Jan 29, 2014, at 12:10 PM, Jiri Kraus <jkraus_at_[hidden]> wrote:

> Hi Jeff,
>
> thanks for taking a look. I don't want to mix compiler tool chains. I have just double checked my configure line and I am passing
>
> CXX=pgc++ CC=pgcc FC=pgfortran F77=pgfortran ...
>
> so there are only PGI compilers used.
>
> Thanks
>
> Jiri
>
>> Date: Wed, 29 Jan 2014 16:24:08 +0000
>> From: "Jeff Squyres (jsquyres)" <jsquyres_at_[hidden]>
>> To: Open MPI Users <users_at_[hidden]>
>> Subject: Re: [OMPI users] Compiling OpenMPI with PGI pgc++
>> Message-ID: <C7F17676-833E-4A51-AD9E-DE988C5D2E0F_at_[hidden]>
>> Content-Type: text/plain; charset="us-ascii"
>>
>> That sounds about right.
>>
>> What's happening is that OMPI has learned a bunch about the C compiler
>> before it does this C++ link test. In your first case (which is assumedly with
>> gcc), it determines that it needs _GNU_SOURCE set -- or some other test has
>> caused that to be set. Then it uses that with pgc++ and runs into the error you
>> show below.
>>
>> Is there a reason you want to mix gcc and pgc++? It's usually simpler/better to
>> use a single compiler suite for the whole thing.
>>
>>
>> On Jan 29, 2014, at 10:54 AM, Jiri Kraus <jkraus_at_[hidden]> wrote:
>>
>>> Hi,
>>>
>>> I am trying to compile OpenMPI 1.7.3 with pgc++ (14.1) as C++ compiler.
>> During configure it fails with
>>>
>>> checking if C and C++ are link compatible... no
>>>
>>> The error from config.log is:
>>>
>>> configure:18205: checking if C and C++ are link compatible
>>> configure:18230: pgcc -c -DNDEBUG -fast conftest_c.c
>>> configure:18237: $? = 0
>>> configure:18268: pgc++ -o conftest -DNDEBUG -fast conftest.cpp
>> conftest_c.o >&5
>>> conftest.cpp:
>>> "conftest.cpp", line 21: error: "_GNU_SOURCE" is predefined; attempted
>>> redefinition ignored
>>> #define _GNU_SOURCE 1
>>> ^
>>>
>>> "conftest.cpp", line 86: error: "_GNU_SOURCE" is predefined; attempted
>>> redefinition ignored
>>> #define _GNU_SOURCE 1
>>> ^
>>>
>>> "conftest.cpp", line 167: warning: statement is unreachable
>>> return 0;
>>> ^
>>>
>>> 2 errors detected in the compilation of "conftest.cpp".
>>>
>>> When I use pgcpp instead of pgc++ OpenMPI configures and builds.
>>>
>>> I am using
>>>
>>> CXX=pgcpp|pgc++ CC=pgcc FC=pgfortran F77=pgfortran CFLAGS=-fast
>> FCFLAGS=-fast FFLAGS=-fast CXXFLAGS=-fast ./configure --with-
>> hwloc=/shared/apps/rhel-6.2/tools/hwloc-1.7.1 --enable-hwloc-pci --with-cuda -
>> -prefix=/home-2/jkraus/local/openmpi-1.7.3/pgi-14.1/cuda-5.5.22
>>>
>>> to configure OpenMPI. Any Idea what caused the errors with pgc++?
>>>
>>> Thanks
>>>
>>> Jiri
>>>
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>>
>> --
>> Jeff Squyres
>> jsquyres_at_[hidden]
>> For corporate legal information go to:
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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/