[petsc-users] Using ViennaCL without recompiling

[Satish Balay]

I was actually suggesting that you recompile and link with the new
install of PETSc. If using PETSc makefiles - you would be chaning
PETSC_DIR [and perhaps PETSC_ARCH] values and rebuilding all PETSc
related code.

Satish

> Hi Franco,
> 
> yes, in principle you can substitute your current PETSc build with your custom
> PETSc build (with ViennaCL enabled) at link time, provided that the version
> numbers match.
> 
> Just to be clear: There is no way around recompiling PETSc, though; there's no
> mechanism for dynamically loading some other shared library to enable ViennaCL
> bindings in PETSc.
> 
> Best regards,
> Karli
> 
> 
> On 04/29/2017 08:14 AM, Franco Milicchio wrote:
> >
> > > On Apr 28, 2017, at 4:46pm, Satish Balay <balay at mcs.anl.gov
> > > <mailto:balay at mcs.anl.gov>> wrote:
> > >
> > > On Fri, 28 Apr 2017, Franco Milicchio wrote:
> > >
> > > >
> > > > > Not recompiling your own project is fine. PETSc has an ABI. You just
> > > > > reconfigure/recompile PETSc with
> > > > > ViennaCL support. Then you can use -mat_type viennacl etc.
> > > >
> > > > Thanks for your answer, Matt, but I expressed myself in an ambiguous
> > > > way.
> > > >
> > > > I cannot recompile PETSc, I can do whatever I want with my code.
> > >
> > > You can always install PETSc.
> > >
> > > If you don't have write permission to the install you are currently
> > > using - you can start with a fresh tarball [of the same version], use
> > > reconfigure*.py from the current install to configure - and install
> > > your own copy [obviously at a different location.
> >
> > Thanks, Satish.
> >
> > As I understand, you are suggesting to just substitute PETSc at linking
> > level with my ViennaCL-enabled library, and it should work “flawlessly”?
> > (the milage may vary, obviously)
> >
> > This would be a huge gain to the project.
> >
> > Thanks,
> > Franco
> > /fm
> >
> > --
> > Franco Milicchio <fmilicchio at me.com <mailto:fmilicchio at me.com>>
> >
> > Department of Engineering
> > University Roma Tre
> > https://fmilicchio.bitbucket.io/
> >
> 
>