[Openmp-dev] : undefined symbol: ompt_start_tool

[Kelvin Li via Openmp-dev]

I don't think that is the case.  There is only one task "-np 1" on one 
node.  Both './a.out' and 'mpirun -np 1 ./a.out' are issued on the same 
node which has the same library in /home/kli/clang-install/lib.  That is 
puzzling me!

Kelvin




From:   Jim Cownie via Openmp-dev <openmp-dev at lists.llvm.org>
To:     via Openmp-dev <openmp-dev at lists.llvm.org>, 
openmp-dev-request at lists.llvm.org
Date:   2020/10/27 04:46 AM
Subject:        [EXTERNAL] Re: [Openmp-dev] :  undefined symbol: 
ompt_start_tool
Sent by:        "Openmp-dev" <openmp-dev-bounces at lists.llvm.org>



Message: 1 Date: Mon, 26 Oct 2020 15:18:45 -0500 From: Kelvin Li via 
Openmp-dev...   



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Message: 1
Date: Mon, 26 Oct 2020 15:18:45 -0500
From: Kelvin Li via Openmp-dev <openmp-dev at lists.llvm.org>
To: openmp-dev at lists.llvm.org
Subject: [Openmp-dev] undefined symbol: ompt_start_tool
Message-ID:
<
OFF5259549.0EC65D66-ON8525860D.006EC181-8525860D.006F94A6 at notes.na.collabserv.com
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Content-Type: text/plain; charset="utf-8"

Has anyone encounter the following error?  I am wondering if it is 
something to do with how I build libomp.so.

$ LD_LIBRARY_PATH=/home/kli/clang-install/lib mpirun -np 1 ./a.out
a.out: symbol lookup error: /home/kli/clang-install/lib/libomp.so: 
undefined symbol: ompt_start_tool
--------------------------------------------------------------------------
Primary job  terminated normally, but 1 process returned
a non-zero exit code. Per user-direction, the job has been aborted.
--------------------------------------------------------------------------
--------------------------------------------------------------------------
mpirun detected that one or more processes exited with non-zero status, 
thus causing
the job to be terminated. The first process to do so was:

 Process name: [[14546,1],0]
 Exit code:    127
--------------------------------------------------------------------------

But it works without mpirun.

$ LD_LIBRARY_PATH=/home/kli/clang-install/lib ./a.out
0
1
2
3


Kelvin
Are you confident that /homie/kli/clang-install/lib is the same on all of 
the nodes used by the MPI program?
And that it contains the same version of libomp.so everywhere?

Perhaps you should also set an envirable to have the OpenMP runtime print 
its version, something like this 
$ KMP_VERSION=1 ./a.out
LLVM OMP version: 5.0.20140926
LLVM OMP library type: performance
LLVM OMP link type: dynamic
LLVM OMP build time: no_timestamp
LLVM OMP build compiler: Clang 12.0
LLVM OMP alternative compiler support: yes
LLVM OMP API version: 5.0 (201611)
LLVM OMP dynamic error checking: no
LLVM OMP thread affinity support: no

On 26 Oct 2020, at 23:44, via Openmp-dev <openmp-dev at lists.llvm.org> 
wrote:

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Today's Topics:

  1. undefined symbol: ompt_start_tool (Kelvin Li via Openmp-dev)
  2. Re: Declare target functions and libomptarget image
     registration order (Manoel Römmer via Openmp-dev)
  3. Re: Declare target functions and libomptarget image
     registration order (Johannes Doerfert via Openmp-dev)
  4. Re: Declare target functions and libomptarget image
     registration order (Narayanaswamy, Ravi via Openmp-dev)


----------------------------------------------------------------------

Message: 1
Date: Mon, 26 Oct 2020 15:18:45 -0500
From: Kelvin Li via Openmp-dev <openmp-dev at lists.llvm.org>
To: openmp-dev at lists.llvm.org
Subject: [Openmp-dev] undefined symbol: ompt_start_tool
Message-ID:
<OFF5259549.0EC65D66-ON8525860D.006EC181-8525860D.006F94A6 at notes.na.collabserv.com>

Content-Type: text/plain; charset="utf-8"

Has anyone encounter the following error?  I am wondering if it is 
something to do with how I build libomp.so.

$ LD_LIBRARY_PATH=/home/kli/clang-install/lib mpirun -np 1 ./a.out
a.out: symbol lookup error: /home/kli/clang-install/lib/libomp.so: 
undefined symbol: ompt_start_tool
--------------------------------------------------------------------------
Primary job  terminated normally, but 1 process returned
a non-zero exit code. Per user-direction, the job has been aborted.
--------------------------------------------------------------------------
--------------------------------------------------------------------------
mpirun detected that one or more processes exited with non-zero status, 
thus causing
the job to be terminated. The first process to do so was:

 Process name: [[14546,1],0]
 Exit code:    127
--------------------------------------------------------------------------

But it works without mpirun.

$ LD_LIBRARY_PATH=/home/kli/clang-install/lib ./a.out
0
1
2
3


Kelvin



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