dolfin team mailing list archive

[Johannes Ring <johannr@xxxxxxxxx>]

On Tue, Oct 23, 2012 at 4:50 PM, Anders Logg <logg@xxxxxxxxx> wrote:
> On Tue, Oct 23, 2012 at 09:29:05AM +0200, Johannes Ring wrote:
>> On Tue, Oct 23, 2012 at 9:14 AM, Johannes Ring <johannr@xxxxxxxxx> wrote:
>> > On Tue, Oct 23, 2012 at 9:00 AM, Anders Logg <logg@xxxxxxxxx> wrote:
>> >> On Tue, Oct 23, 2012 at 08:59:36AM +0200, Johannes Ring wrote:
>> >>> On Tue, Oct 23, 2012 at 8:27 AM, Anders Logg <logg@xxxxxxxxx> wrote:
>> >>> > On Mon, Oct 22, 2012 at 10:44:17PM -0700, Anders Logg wrote:
>> >>> >> I'm having trouble getting DOLFIN configure to recognize the LAPACK
>> >>> >> built as part of my ATLAS install. Exactly what is the CMake module
>> >>> >> FindLAPACK module looking for?
>> >>> >>
>> >>> >> Is the LAPACK installation by ATLAS (using --with-netlib-lapack-tarfile) not
>> >>> >> sufficient?
>> >>> >
>> >>> > The problem seems to be that CMAKE_LIBRARY_PATH is not used in
>> >>> > FindLAPACK.cmake. It's instead using the variable _libdir.
>> >>> >
>> >>> > I haven't been hacking CMake for quite some time. Can someone
>> >>> > enlighten me on whether anything is broken in FindLAPACK.cmake?
>> >>>
>> >>> I'm also having trouble with DOLFIN and my selfbuilt ATLAS/LAPACK. I
>> >>> will let you know if I found something out.
>> >>
>> >> Great, thanks.
>> >
>> > This worked for me:
>> >
>> >   -D BLA_VENDOR:STRING=ATLAS \
>> >   -D LAPACK_DIR:PATH=${ATLAS_DIR} \
>> >   -D LAPACK_LIBRARIES:FILEPATH=${ATLAS_DIR}/lib/liblapack.a \
>> >   -D BLAS_DIR:PATH=${ATLAS_DIR} \
>> >   -D BLAS_LIBRARIES:FILEPATH="${ATLAS_DIR})/lib/libf77blas.a;${ATLAS_DIR})/lib/libcblas.a;${ATLAS_DIR})/lib/libatlas.a"
>>
>> There was a typo there, but this also works for me:
>>
>>       -D LAPACK_LIBRARIES:FILEPATH=${ATLAS_DIR}/lib/liblapack.a \
>>       -D BLAS_LIBRARIES:FILEPATH=${ATLAS_DIR}/lib/libatlas.a
>
> ok, I'll try that later.
>
> But it seems unnecessarily complicated. It should be enough for us to
> define FOO_DIR to make it work. Can we define these extra variables in
> CMakeLists.txt in DOLFIN or modify FindLAPACK?

I haven't looked much into FindLAPACK and FindBLAS. I think they are
more or less the same as the ones that come with CMake, only with some
minor fixes. The can probably be improved, but I don't think setting
LAPACK_LIBRARIES and BLAS_LIBRARIES is complicated. It should be easy
to add in Dorsal.

> Another issue is whether it would be possible to just define one
> variable, say FENICS_DIR, and use as a fallback for all dependencies.
>
> I have a config file containing this:
>
> export BLAS_DIR=$PREFIX
> export LAPACK_DIR=$PREFIX
> export LAPACKANDBLAS_DIR=$PREFIX
> export BOOST_ROOT=$PREFIX
> export ARMADILLO_DIR=$PREFIX
> export PETSC_DIR=$PREFIX
> export PETSC_ARCH=linux-gnu-cxx-opt
> export SLEPC_DIR=$PREFIX
> export UFC_DIR=$PREFIX
> export TRILINOS_DIR=$PREFIX
>
> If one uses Dorsal to build all dependencies for DOLFIN, it would be
> convenient to define just FENICS_DIR and if one of the libraries we
> depend on happens to be in another place that can be overridden. I
> imagine we could add a section to deal with this in CMakeLists.txt.
>
> if (NOT _BLAS_DIR)
>   set(BLAS_DIR ${FENICS_DIR})
> endif ()
> if (NOT _LAPACK_DIR)
>   set(LAPACK_DIR ${FENICS_DIR})
>   + extra LAPACK stuff
> endif ()
> etc

It is not necessary to define FOO_DIR, BAR_DIR, etc. if all of them
points to the same directory. Simply do

  export CMAKE_PREFIX_PATH=$PREFIX

That will tell CMake to prefer packages found in $PREFIX. This should
probably be added somewhere in Dorsal.

Johannes