[Divyaprakash]

Hi,

I have a set of operations that need to be performed in fortran. I have bundled it in a subroutine and created a shared library. I am trying to call it from openfoam. Initially I am not passing any arguments to the subroutine since I just want to check if it works.

Here is my modified options file.

EXE_INC = \
    -I$(LIB_SRC)/finiteVolume/lnInclude \
    -I$(LIB_SRC)/meshTools/lnInclude

EXE_LIBS = \
    -lfiniteVolume \
    -lmeshTools \
    -L/home/divyaprakash/my_solvers/ofcil/fem2d -lsoftparticles

~
And this where I include the call in the solver

// Declare the external subroutine
extern "C" {
    void generateellipse_();
}

int main(int argc, char *argv[])
{
    argList::addNote
    (
        "Transient solver for incompressible, laminar flow"
        " of Newtonian fluids."
    );

    #include "postProcess.H"

    #include "addCheckCaseOptions.H"
    #include "setRootCaseLists.H"
    #include "createTime.H"
    #include "createMesh.H"

    pisoControl piso(mesh);

    #include "createFields.H"
    #include "initContinuityErrs.H"

    // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

    Info<< "\nStarting time loop\n" << endl;
    generateellipse_();

I get the error which says it can't find reference to the subroutine.

Making dependency list for source file icoFoam.C
g++ -std=c++14 -m64 -pthread -DOPENFOAM=2012 -DWM_DP -DWM_LABEL_SIZE=32 -Wall -Wextra -Wold-style-cast -Wnon-virtual-dtor -Wno-unused-parameter -Wno-invalid-offsetof -Wno-attributes -Wno-unknown-pragmas  -O3  -DNoRepository -ftemplate-depth-100 -I/usr/lib/openfoam/openfoam2012/src/finiteVolume/lnInclude -I/usr/lib/openfoam/openfoam2012/src/meshTools/lnInclude -iquote. -IlnInclude -I/usr/lib/openfoam/openfoam2012/src/OpenFOAM/lnInclude -I/usr/lib/openfoam/openfoam2012/src/OSspecific/POSIX/lnInclude   -fPIC -c icoFoam.C -o Make/linux64GccDPInt32Opt/icoFoam.o
g++ -std=c++14 -m64 -pthread -DOPENFOAM=2012 -DWM_DP -DWM_LABEL_SIZE=32 -Wall -Wextra -Wold-style-cast -Wnon-virtual-dtor -Wno-unused-parameter -Wno-invalid-offsetof -Wno-attributes -Wno-unknown-pragmas  -O3  -DNoRepository -ftemplate-depth-100 -I/usr/lib/openfoam/openfoam2012/src/finiteVolume/lnInclude -I/usr/lib/openfoam/openfoam2012/src/meshTools/lnInclude -iquote. -IlnInclude -I/usr/lib/openfoam/openfoam2012/src/OpenFOAM/lnInclude -I/usr/lib/openfoam/openfoam2012/src/OSspecific/POSIX/lnInclude   -fPIC -Xlinker --add-needed -Xlinker --no-as-needed  Make/linux64GccDPInt32Opt/icoFoam.o -L/usr/lib/openfoam/openfoam2012/platforms/linux64GccDPInt32Opt/lib \
    -lfiniteVolume -lmeshTools -L/home/divyaprakash/my_solvers/ofcil/fem2d -lsoftparticles -lOpenFOAM -ldl  \
     -lm -o /home/divyaprakash/OpenFOAM/divyaprakash-v2012/platforms/linux64GccDPInt32Opt/bin/cilFoam
/usr/bin/ld: Make/linux64GccDPInt32Opt/icoFoam.o: in function `main':
icoFoam.C:(.text.startup+0x3203): undefined reference to `generateellipse_'
collect2: error: ld returned 1 exit status
make: *** [/usr/lib/openfoam/openfoam2012/wmake/makefiles/general:150: /home/divyaprakash/OpenFOAM/divyaprakash-v2012/platforms/linux64GccDPInt32Opt/bin/cilFoam] Error 1

I have checked the shared library and it works when linked to another fortran program. Please help.


Note: I have also tried without the underscore in the subroutine name and that also returns the same error.