CFD Online Discussion Forums - Including PETSc in an OF solver

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Including PETSc in an OF solver

Hello friends,

I'd like to include PETSc's headers in my solver but I can't figure out how to make it compile.

A PETSc program's makefile is as follows:

Code:

include ${PETSC_DIR}/lib/petsc/conf/variables

include ${PETSC_DIR}/lib/petsc/conf/rules



all: src/LinearSystemSolver.o chkopts 

        -${CLINKER} -o LinearSystemSolver src/LinearSystemSolver.o  ${PETSC_KSP_LIB} 

        ${RM} LinearSystemSolver.o

And OF's solver's makefile is, as you may already know, split into two files('options' and 'files') under a directory called 'Make':
'options':

Code:

EXE_INC = \

    -I$(LIB_SRC)/finiteVolume/lnInclude \

    -I$(LIB_SRC)/meshTools/lnInclude

    

EXE_LIBS =         -lfiniteVolume \

                        -lmeshTools

'files':

Code:

myLaplacianFoam.C



EXE = App/myLaplacianFoam

How am I supposed to edit 'options' and 'files' to make it work?

I appreciate your time and thanks in advance!
Basel

Hi Basel,

I am trying to do the same thing. Have you been able to link petsc with your solver?

For someone who might need the answer, I was able to link the icoFoam solver with petsc by doing the following steps:

Note: I am using petsc-3.4.5 and it is installed in my /home directory.

1. Create a shared library of petsc by invoking the following command from any directory in the PETSc source

Code:

make BOPT=O shared

This command will generate libpetsc.so in the folder arch-linux-cxx-opt/lib and it will be included into Make/options.

2. Include petsc.h into icoFoam.C

Code:

#include "petsc.h"

3. Change the Make/options to:

Code:

PETSC_DIR=$(HOME)/petsc/petsc-3.4.5

EXE_INC = \

    -I$(LIB_SRC)/finiteVolume/lnInclude \

    -I$(LIB_SRC)/meshTools/lnInclude \

    -I$(PETSC_DIR)/include \

    -I$(PETSC_DIR)/include/mpiuni \

    -I$(PETSC_DIR)/$(PETSC_ARCH)/include



EXE_LIBS = \

    -lfiniteVolume \

    -lmeshTools \

    -L$(PETSC_DIR)/$(PETSC_ARCH)/lib -lpetsc

4. Compile:

Code:

export PETSC_ARCH=arch-linux-cxx-opt

wmake

I have no idea why putting the line PETSC_ARCH=arch-linux-cxx-opt into Make/options does not work. That's why I have to define the PETSC_ARCH variable explicitly and then wmake.

Hope this can helps

I am sorry, eventhough the solver was successfully compiled, it does not work.

The error is that libpetsc.so could not be found, even though it is still exist in my $PETSC_ARCH/lib directory:

Code:

icoPetscFoam: error while loading shared libraries: libpetsc.so: cannot open shared object file: No such file or directory

I have been struggling with this problem for weeks but I have not been able to find a clue to fix it. I would appreciate any suggestion to help me solve this.

Problem solved!

Just need to define the LD_LIBRARY_PATH environmental variable in $HOME/.bashrc

Code:

echo "export LD_LIBRARY_PATH=\$PETSC_DIR/\$PETSC_ARCH/lib">>$HOME/.bashrc