[petsc-dev] PETSc-Cuda with gfortran 4.7

[Karl Rupp]

Hi Ervik,

thanks for the hint. Do you happen to have any information on whether 
the suggested fix interferes with other versions of GCC or CUDA? Is this 
specific to version 4.7.2 or a 'general fix' for GCC?

Best regards,
Karli


On 03/12/2013 02:35 AM, Åsmund Ervik wrote:
> Hi all,
>
> (This suggestion is two lines of code, so I hope it will survive the git/hg apocalypse/transition today. If not, I'll resend it tomorrow.)
>
> Trying to compile PETSc with Cuda enabled, following the example in config/examples/arch-cuda-double.py, I get an error with gfortran 4.7.2 when making (configure works fine).
> This error is apparently well-known with Cuda and gcc 4.7.2. To fix it, I added two lines to include/petsc-private/petscimpl.h:
> #undef _GLIBCXX_ATOMIC_BUILTINS
> #undef _GLIBCXX_USE_INT128
> and everything works fine. I guess you should add this to petsc-dev, possibly with some if-statement around these lines.
>
> Best regards,
> Åsmund Ervik
>