[petsc-dev] Mat/DM dependency

[Jed Brown]

On Fri, 1 Jan 2010 16:15:54 -0600, Barry Smith <bsmith at mcs.anl.gov> wrote:
> 
> On Jan 1, 2010, at 1:19 PM, Jed Brown wrote:
> 
> > Mat does not normally depend on DM, but a couple implementations do,
> >
> >  $ grep -rl DAGet petsc/src/mat/impls
> >  petsc/src/mat/impls/hypre/mhyp.c
> >  petsc/src/mat/impls/adic/nladic.c
> >  petsc/src/mat/impls/adic/matadic.c
> >
> > So when these are enabled, all the Mat examples fail to link because
> > PETSC_MAT_LIB does not include PETSC_DM_LIB.
> 
>     Please explain in detail when this occurs. It does not happen to  
> me on the Apple with static, shared or dynamic libraries. Does it  
> happen when linking the example or running it? Please cut and past all  
> error messages that appear.

This problem is present with every build I have where Hypre is enabled.
I normally use shared, but not dynamic so the errors show up at link
time.

$ make info |grep '^Using configure Options'
Using configure Options: --with-zoltan-dir=/usr --download-ml --with-blas-lapack-dir=/usr --download-blacs --download-chaco --with-mpi-dir=/usr --download-mumps --download-superlu_dist --download-spooles --with-parmetis-dir=/usr --download-hypre --with-c2html --with-hdf5-dir=/usr --with-umfpack-dir=/usr --download-sundials --download-scalapack --with-lgrind --with-shared --with-sowing -PETSC_ARCH=ompi --download-superlu --download-spai
$ cd src/mat/examples/tutorials && make ex1
/usr/bin/mpicc -o ex1.o -c -fPIC -Wall -Wwrite-strings -Wno-strict-aliasing -g3 -I/home/jed/petsc/ompi/include -I/home/jed/petsc/include -I/usr/include -I/usr/lib/openmpi -I/home/jed/petsc/ompi/include -D__SDIR__="src/mat/examples/tutorials/" ex1.c
/usr/bin/mpicc -fPIC -Wall -Wwrite-strings -Wno-strict-aliasing -g3   -o ex1 ex1.o -Wl,-rpath,/home/jed/petsc/ompi/lib -L/home/jed/petsc/ompi/lib -lpetscmat -lpetscvec -lpetsc    -Wl,-rpath,/usr/lib -L/usr/lib -lzoltan -lX11 -Wl,-rpath,/home/jed/petsc/ompi/lib -L/home/jed/petsc/ompi/lib -lcmumps -ldmumps -lsmumps -lzmumps -lmumps_common -lpord -lscalapack -lblacs -lchaco -lspooles -lHYPRE -Wl,-rpath,/usr/lib/openmpi -Wl,-rpath,/usr/lib/gcc/x86_64-unknown-linux-gnu/4.4.2 -lmpi_cxx -lstdc++ -lhdf5 -lz -lsuperlu_dist_2.3 -lparmetis -lmetis -lml -lmpi_cxx -lstdc++ -lspai -lsundials_cvode -lsundials_nvecserial -lsundials_nvecparallel -lsuperlu_4.0 -lumfpack -lamd -Wl,-rpath,/usr -L/usr -llapack -lcblas -lf77blas -latlas -Wl,-rpath,/usr/lib/openmpi -L/usr/lib/openmpi -Wl,-rpath,/usr/lib/gcc/x86_64-unknown-linux-gnu/4.4.2 -L/usr/lib/gcc/x86_64-unknown-linux-gnu/4.4.2 -ldl -lmpi -lopen-rte -lopen-pal -lnsl -lutil -lgcc_s -lpthread -lmpi_f90 -lmpi_f77 -lgfortran -lm -lm -Wl,-rpath,/usr/lib/gcc/x86_64-unknown-linux-gnu -L/usr/lib/gcc/x86_64-unknown-linux-gnu -lm -lm -lmpi_cxx -lstdc++ -lmpi_cxx -lstdc++ -ldl -lmpi -lopen-rte -lopen-pal -lnsl -lutil -lgcc_s -lpthread -ldl  
/home/jed/petsc/ompi/lib/libpetscmat.so: undefined reference to `DAGetInfo'
/home/jed/petsc/ompi/lib/libpetscmat.so: undefined reference to `DAGetCorners'
/home/jed/petsc/ompi/lib/libpetscmat.so: undefined reference to `DAGetGhostCorners'
/home/jed/petsc/ompi/lib/libpetscmat.so: undefined reference to `DAGetGlobalIndices'
collect2: ld returned 1 exit status
make: [ex1] Error 1 (ignored)
/bin/rm -f ex1.o

>    Let's not get carried away with redesigning all of PETSc because of  
> a simple link issue (or crappy shared library design on Linux :-).

The stuff in mhyp.c uses DA, this is a dependency loop because (1) this
file resides in src/mat and (2) it is linked into libpetscmat which we
claim can be used without libpetscdm.

Jed