[petsc-users] Cannot convert error

[Barry Smith]

On Sep 19, 2012, at 6:49 AM, Jed Brown <jedbrown at mcs.anl.gov> wrote:

> On Wed, Sep 19, 2012 at 6:25 AM, Eduardo <erocha.ssa at gmail.com> wrote:
> Is there a macro I can get the Petsc release? I'd like to link my code
> with libraries that are using a old version of Petsc. However, in the
> future these libraries may change to a newer version. So I want to
> write my code with ifdefs so that I can change from one version to the
> other easily.
> 
> See include/petscversion.h
> 
> Starting in petsc-3.3, there are convenience macros PETSC_VERSION_LT() and PETSC_VERSION_LE(). You can add to your headers:
> 
> #if !defined(PETSC_VERSION_LT)
> #  define PETSC_VERSION_LT (... copy from petscversion.h)
> #endif
> 
> then in your source,
> 
> #if PETSC_VERSION_LE(3,3,0) /* last version doing it the old way */
>   the old way
> #else
>   the new way
> #endif

  Since PETSc is user installable we don't recommend taking this route. We recommend just always developing and user your code with the latest PETSc release.

    Barry