[petsc-dev] PETSc-Cuda with gfortran 4.7

[Åsmund Ervik]

Hi Dave,

The errors occur when compiling these CUDA files:
mpiaijAssemble.cu, aijcusp.cu, mpicusp.cu and veccusp.cu
I assume these are compiled with nvcc, but I haven't triple checked that.

I had not tried your trick with setting the C compiler in nvcc.profile.
I did, however, try symlinking gcc-4.4 binaries into /usr/local/cuda/bin
(as was suggested in one stackexchange post I found), but this produced
an error during configure. Using your nvcc.profile, it gives the same error:

CUDA version error: PETSC currently requires CUDA version 4.0 or higher
- when compiling with CUDA

Even though I have CUDA 5.0 installed. Just to be sure, are there
binaries beside gfortran, gcc and g++ which must be found in the
CUDA-specific gcc-4.6 folder? I have both gcc variants installed through
the packaging system of my distro, so I cant't tell which belong to the
4.6 variant.

Asmund

On 13. mars 2013, wdn at lanl.gov wrote:
> 
> Asmund,
> 
> Do the failures you report below occur in cuda code that is ultimately compiled with nvcc?
> I have not had problems compiling petsc-dev with cuda support on a Fedora 17 system
> which uses gcc-4.7.2 and gfortran-4.7.2.  However, I have gcc 4.6.3 installed also and
> have nvcc pointed at it by using the /usr/local/cuda/bin/nvcc.profile with a couple of lines
> added.  So, when I build petsc-dev on my Fedora 17 system, it uses gcc-4.7.2 and
> gfortran-4.7.2 for everything except cuda code located in .cu files.  I would worry about
> removing some functionality in 4.7.2 with your suggested modification.
> 
> Thanks,
> 
> Dave
> 
> --
> Dave Nystrom
> LANL HPC-5
> Phone: 505-667-7913
> Email: wdn at lanl.gov
> Smail: Mail Stop B272
>        Group HPC-5
>        Los Alamos National Laboratory
>        Los Alamos, NM 87545
> 
>