[petsc-dev] Add dependency to configure

[Smith, Barry F.]

  Note that since OpenCV has a dependency on OpenCL you will need to add that dependency to the opencv.py that you create. Read the docs in package.py or look at other packages/*.py for how to put in dependencies on other packages.


   Barry




> On Sep 19, 2018, at 5:36 AM, Matthew Knepley <knepley at gmail.com> wrote:
> 
> On Wed, Sep 19, 2018 at 6:22 AM Marek Pecha <marek.pecha at vsb.cz> wrote:
> Hello,
> 
> I work on clustering framework uses PETSc. Basically, I would like to use this framework for segmentation images. So, I had idea - implement viewer for loading images (JPEG,TIFF, etc) into PETSc. For this purpose, I would like to add OpenCV dependency to PETSc configure. But I have no idea, how can I do it. Can you help me?
> 
> Yes. I recommend the following:
> 
>   1) Determine how OpenCV builds, namely GNU or CMake. There is a lot of documentation of these classes, for example
> 
>   https://bitbucket.org/petsc/petsc/src/b55713d40e38bd17e2dd98e82adf6c653b648f33/config/BuildSystem/config/package.py#lines-960
> 
>   2) Find a package with similar checks in
> 
>   $PETSC_DIR/config/BuildSystem/config/packages
> 
>   3) Copy that module to opencv.py, make your changes, and leave it in the directory
> 
>   4) Configure should automatically pick it up
> 
>   5) Once everything works, make a PR for that and we will incorporate it
> 
>   Thanks,
> 
>      Matt
>  
> Thank you
> Marek
> 
> 
> -- 
> What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.
> -- Norbert Wiener
> 
> https://www.cse.buffalo.edu/~knepley/