[petsc-dev] openmp

[Svetlana Tkachenko]

Thanks. Could you please send an example makefile for this small example as src/ts/examples/tutorials/makefile is huge and I don't know which part of it manages the -I -L stuff.

  Svetlana

On Thu, 7 Nov 2013, at 1:19, Barry Smith wrote:
> 
>    Your makefile does not indicate the location of mpif.h to your FORTRAN compiler which in the case of —with-mpi=0 is in ${PETSC}/include/mpiuni
> 
>    Note that if you simply copy a makefile from PETSc, say src/ts/examples/tutorials/makefile and modify that slightly for you code you don’t need to manage all the -I -L stuff yourself, our makefiles take care of it and are portable for different MPIs etc.
> 
>     Barry
> 
> 
> 
> On Nov 6, 2013, at 12:25 AM, Svetlana Tkachenko <svetlana.tkachenko at fastmail.fm> wrote:
> 
> > I have configured petsc-dev (downloaded it today) with these options, and a small example. It appears to fail to compile without MPI with the error message:
> > 
> > ./configure --with-cc=gcc --with-fc=gfortran  --download-f-blas-lapack --with-openmp --with-mpi=0
> > 
> > ~/dev/test/petsc $ echo $LD_LIBRARY_PATH
> > /home/<username>/petsc/linux-amd64/lib:/opt/openmpi/lib
> > ~/dev/test/petsc $ cat solver.f
> >        subroutine solver()
> > #include <finclude/petscsys.h>
> > 
> >          PetscErrorCode ierr
> >          print *, "Entered petsc."
> > 
> >          ! Init PETSc
> >          call PetscInitialize(PETSC_NULL_CHARACTER,ierr)
> >          CHKERRQ(ierr)
> >          print *, "Init done."
> > 
> >          ! Finalise PETSc
> >          call PetscFinalize(ierr)
> >          CHKERRQ(ierr)
> >          print *, "Finalized."
> >         end
> > ~/dev/test/petsc $ cat myexample.f
> >       program myexample
> > 
> >           call solver
> >       end
> > ~/dev/test/petsc $ cat makefile
> > include ${PETSC_DIR}/conf/variables
> > 
> > myexample: myexample.o solver.o ; gfortran -o myexample myexample.o solver.o -lpetsc -L${PETSC_DIR}/${PETSC_ARCH}/lib -fopenmp
> > solver.o: ; gfortran -c -cpp -I${PETSC_DIR}/include -O0 solver.f -lpetsc -I${PETSC_DIR}/${PETSC_ARCH}/include -L${PETSC_DIR}/${PETSC_ARCH}/lib -lpetsc -fopenmp
> > myexample.o: ; gfortran -c -cpp -I${PETSC_DIR}/include -O0 myexample.f -lpetsc -I${PETSC_DIR}/${PETSC_ARCH}/include -L${PETSC_DIR}/${PETSC_ARCH}/lib -lpetsc -fopenmp
> > ~/dev/test/petsc $ make
> > gfortran -c -cpp -I/home/<username>/petsc/include -O0 myexample.f -lpetsc -I/home/<username>/petsc/linux-amd64/include -L/home/<username>/petsc/linux-amd64/lib -lpetsc -fopenmp
> > gfortran -c -cpp -I/home/<username>/petsc/include -O0 solver.f -lpetsc -I/home/<username>/petsc/linux-amd64/include -L/home/<username>/petsc/linux-amd64/lib -lpetsc -fopenmp
> > In file included from solver.f:3:
> > /home/<username>/petsc/include/finclude/petscsys.h:10: error: mpif.h: No such file or directory
> > /home/<username>/petsc/include/finclude/petscsys.h:163.29:
> >    Included at solver.f:3:
> > 
> >      parameter(MPIU_SCALAR = MPI_DOUBLE_PRECISION)
> >                             1
> > Error: Parameter 'mpi_double_precision' at (1) has not been declared or is a variable, which does not reduce to a constant expression
> > /home/<username>/petsc/include/finclude/petscsys.h:171.30:
> >    Included at solver.f:3:
> > 
> >      parameter(MPIU_INTEGER = MPI_INTEGER)
> >                              1
> > Error: Parameter 'mpi_integer' at (1) has not been declared or is a variable, which does not reduce to a constant expression
> > make: *** [solver.o] Error 1
> > ~/dev/test/petsc $ 
>