[broccolibadger]

Hi,

Hopyfully this is the right place to ask such a question as a beginner.

I'm trying to compile the source code for v2006 and openmpi on a Ubuntu 20.04 machine, getting this error:

Everything beforehand works just fine, it is this part just at the start of the OpenFOAM compiling process that a problem occurs.

========================================
Done ThirdParty Allwmake
========================================

========================================
Compile OpenFOAM libraries

    ln: OpenFOAM/lnInclude
    ln: OSspecific/POSIX/lnInclude


...



OpenFOAM/OpenFOAM-v2006/platforms/linux64GccDPInt32OptOPENMPI/lib \
    -L/home/henrik/OpenFOAM/ThirdParty-v2006/platforms/linux64Gcc/openmpi-4.0.3/lib64 -L/home/henrik/OpenFOAM/ThirdParty-v2006/platforms/linux64Gcc/openmpi-4.0.3/lib -lmpi  -o /home/henrik/OpenFOAM/OpenFOAM-v2006/platforms/linux64GccDPInt32Opt/lib/openmpi-4.0.3/libPstream.so
g++: error: /home/henrik/OpenFOAM/OpenFOAM-v2006/build/linux64GccDPInt32OptOPENMPI/src/Pstream/mpi/UOPwrite.o: No such file or directory
g++: error: /home/henrik/OpenFOAM/OpenFOAM-v2006/build/linux64GccDPInt32OptOPENMPI/src/Pstream/mpi/UIPread.o: No such file or directory
g++: error: /home/henrik/OpenFOAM/OpenFOAM-v2006/build/linux64GccDPInt32OptOPENMPI/src/Pstream/mpi/UPstream.o: No such file or directory
g++: error: /home/henrik/OpenFOAM/OpenFOAM-v2006/build/linux64GccDPInt32OptOPENMPI/src/Pstream/mpi/PstreamGlobals.o: No such file or directory
make: *** [/home/henrik/OpenFOAM/OpenFOAM-v2006/wmake/makefiles/general:184: /home/henrik/OpenFOAM/OpenFOAM-v2006/platforms/linux64GccDPInt32Opt/lib/openmpi-4.0.3/libPstream.so] Error 1

Any help or hint on how to proceed would make my day.

Some trouble regarding AIDOS compilation was alleviated by:

sudo apt install --reinstall #_mpi libraries here_#

perhaps it is related?

Compilation has previously worked fine for OF version 19.06, though since then the ubuntu distro has been upgraded.

Cheers

[fertinaz]

Hello Henrik,

The problem is the objects under Pstream is not created properly which indicates an MPI related problem.

I recently compiled OF-2006, but I did by installing openmpi manually. New OF is shipped with openmpi-4.0.3, which I believe is not the version installed using the package manager. I assumed that's what you did.

So you got two options here:

1. Manually install openmpi-4.0.3: You'll have to download and build it by yourself. If you're a beginner this may sound daunting, but I assure you it's not. One thing that you need to be careful with is updating the OS environment variables PATH and LD_LIBRARY_PATH. If you choose to do this, you don't need to change anything in the OF configuration files. But I guess you might have set "MPI_ARCH_PATH" to your MPI installation path.
2. Use openmpi-4.0.3 that is shipped with ThirdParty: If you want OF to install openmpi for you, then you need to find the following line in the etc/bashrc:
   export WM_MPLIB=SYSTEMOPENMPI
   and change it to
   export WM_MPLIB=OPENMPI
   This is gonna (supposedly, haven't tried myself) find the openmpi-4.0.3 directory under the ThirdParty folder, and build openmpi from scratch. I don't think you need to change anything else if you follow this approach.

Hope this helps

[broccolibadger]

Hi again, and thanks!

I solved the problem by compiling the MPI that comes in ThirdParty. Apparently compiling the package with the flag -k such as below is what's needed for the libraries to be built fully.

./Allwmake -k

[michu5696]

No that just skips the errors so compilation is not interrupted but you still have to build it again without -k option to make sure everything went fine.

[aendres]

Hi Henrik,



I just had the same issue. In my case, it was caused by the -q flag for Allwmake, which is recommended in the build guide. When omitting the -q flag (just running ./Allwmake -j -s -l), the compilation even worked with the systems openmpi (WM_MPLIB=SYSTEMOPENMPI). This could explain why "./Allwmake -k" resolved the issue in your case.

[sihaqqi]

Hi
What does these flags -s, -l, -j mean. Can some one please advise a resource link where I can understand these bash scripts.

[fertinaz]

Sihaqqi

• -s is silent mode. It doesn't echo command outputs.
• -j is specified compilation is executed in parallel.
• -l is used to redirect outputs to a log file.
• -k enables ignoring errors which is why it causes confusion in some cases.
• -q enables wmakeCollect which is wmake scheduler for efficient parallel compilations.

All of this information can be found in the scripts located under wmake folder.

[olesen]

Originally Posted by sihaqqi

Hi
What does these flags -s, -l, -j mean. Can some one please advise a resource link where I can understand these bash scripts.

Self-documented:
'wmake -help' or even './Allwmake -help'