[Trilinos-Users] [EXTERNAL] Epetra configuration problem detecting dggsvd3 in LAPACK

[Elliott, James John]

Hey Patrick,

Is CMake finding the BLAS/LAPACK TPLs?

e.g., what is the output related to:
Processing enabled TPL: LAPACK (enabled explicitly, disable with -DTPL_ENABLE_LAPACK=OFF)

The check for the function is here, and it should be adding those libs when it links.
[jjellio at mutrino:~/src/Trilinos-jjellio] less packages/epetra/cmake/CheckHaveEpetraLapackGSSVD3.cmake
...
  SET(CMAKE_REQUIRED_LIBRARIES ${TPL_LAPACK_LIBRARIES} ${TPL_BLAS_LIBRARIES})




________________________________________
From: Widener, Patrick
Sent: Thursday, March 2, 2017 1:51 PM
To: Elliott, James John
Cc: trilinos-users at trilinos.org
Subject: Re: [EXTERNAL] [Trilinos-Users] Epetra configuration problem detecting dggsvd3 in      LAPACK

Hi James - I should have mentioned a couple of things that I’d already tried, one of which is this.

Also, it’s not the link of a Trilinos executable that’s failing. It’s the link of the stub program generated in the configuration-time check in Epetra for dggsvd3. This is failing for me whether I have gfortran added to a LIBRARIES variable or not; the generated compiler command to link the stub program which checks for dggsvd3 doesn’t link against libgfortran in either case.

thanks
patrick

> On Mar 2, 2017, at 12:44 PM, Elliott, James John <jjellio at sandia.gov> wrote:
>
> Hi Patrick,
>
> You need to add -lgfortran to your link line, or add "gfortran" to your list of required lapack libraries.
>
> For example (my local OpenBLAS build)
> export BLAS_LIBRARIES="/home/jjellio3/install/openblas-threaded/lib/libopenblas.a;gfortran"
>
> Then my CMake script has:
>
> -D TPL_ENABLE_BLAS=ON \
>   -D TPL_BLAS_LIBRARIES:PATH="${BLAS_LIBRARIES}" \
> -D TPL_ENABLE_LAPACK=ON \
>   -D TPL_LAPACK_LIBRARIES:PATH="${BLAS_LIBRARIES}" \
>
>
> James
>
> ________________________________________
> From: Trilinos-Users <trilinos-users-bounces at trilinos.org> on behalf of Widener, Patrick <pwidene at sandia.gov>
> Sent: Thursday, March 2, 2017 12:38 PM
> To: trilinos-users at trilinos.org
> Subject: [EXTERNAL] [Trilinos-Users] Epetra configuration problem detecting dggsvd3 in  LAPACK
>
> Hello -
>
> In my Trilinos CMake step, Epetra’s check for dggsvd3 in my installed LAPACK (3.6.1) is failing due to a missing symbol from libgfortran. This is causing Epetra to believe I have an older version of LAPACK and consequently a later link error trying to reference dggsvd from Epetra_LAPACK::GGSVD.
>
> The curious thing is that this occurs for me when using mpicc from OpenMPI, but the dggsvd3 check passes and so no link error with mpicc from MPICH.
>
> Has anyone else experienced this? I’m on Mac (El Capitan), gcc 4.9 for both Open MPI and MPICH, Open MPI 1.10 and MPICH 3.3. I pulled from the Trilinos repo last week.
>
> thanks!
> patrick
>
> _______________________________________________
> Trilinos-Users mailing list
> Trilinos-Users at trilinos.org
> https://trilinos.org/mailman/listinfo/trilinos-users