[Trilinos-Users] BLAS/LAPACK automatically linked by compiler

[Antonio Cervone]

hi Nico,
one way to go around this problem is to explicitly set the internal
variable that tribits uses to link the library, i.e.

TPL_BLAS_LIBRARIES
TPL_BLAS_INCLUDE_DIRS

if you set them to empty you should avoid the double linking.
bye

antonio



On Mon, Sep 10, 2012 at 5:54 PM, Nico Schlömer <nico.schloemer at gmail.com> wrote:
> Hi all,
>
> here's a funny compiler issue.
> On NERSC, the BLAS and LAPACK libraries are automatically included on
> the link line by their compiler wrappers, much like libmpi.a is
> automatically linked on many other platforms.
> We've got outselves a little bit of a conflict of responsibilities
> here since also CMake tries to care of BLAS and LAPACK, e.g.,
>
> -D TPL_ENABLE_BLAS:BOOL=ON \
>       -D BLAS_LIBRARY_DIRS:FILEPATH="$CRAY_LIBSCI_PREFIX_DIR/lib" \
>       -D BLAS_LIBRARY_NAMES="sci_gnu" \
>
> The exact library locations aren't officially disclosed, so at best
> I'm getting BLAS and LAPACK implicitly twice on the link line. Should
> they decide to change their BLAS/LAPACK directories in the wrappers
> one day, however, this'll lead to two different BLAS/LAPACK libraries
> on the link line which is less than ideal.
>
> What's the situation on other HPCs, and how do you deal with this?
>
> --Nico
>
> _______________________________________________
> Trilinos-Users mailing list
> Trilinos-Users at software.sandia.gov
> http://software.sandia.gov/mailman/listinfo/trilinos-users
>