[petsc-dev] [GPU] Cusp default configuration is broken

[Barry Smith]

> On Jul 24, 2015, at 9:28 AM, Karl Rupp <rupp at iue.tuwien.ac.at> wrote:
> 
> Hi Massimiliano,
> 
> > I came across this [alleged] bug when installing petsc with GPU support:
>> if I run configure with option –with-cusp-include=… it complains I
>> should also set –with-cusp-lib, but cusp is a pure template library, so
>> there is no static or shared library to link against.

  Interestingly despite the lack of a library it is located at https://github.com/cusplibrary/cusplibrary.git
> 
> 
> Correct. The sample file in config/examples/arch-cuda-double.py uses --with-cusp-dir for exactly that reason.
> 
> 
>> As an alternative, it offers to specify –with-cusp-dir=CUSP_DIR , and
>> then it tries to guess the include directory as $CUSP_DIR/include, which
>> is wrong as in current CUSP version the directory containing the headers
>> is $CUSP_DIR/cusp.
>> 
>> An easy workaround is to go to $CUSP_DIR and create a symbolic link
>> $CUSP_DIR/include that points to $CUSP_DIR/cusp, but I think the
>> configure script should be corrected [one might not always have
>> permission to create this link.
> 
> Thanks for the feedback, I will look into this. We have other libraries in use which use a similar folder organization as CUSP, so I suspect something system-specific. Could you send us configure.log for the case where you configure using –with-cusp-dir=CUSP_DIR?
> 
> Thanks and best regards,
> Karli
>