Re: How to use mpirun with C or C++ Org-babel?

[tbanelwebmin]

    On 23-12-08 00:10, Edgar Lux wrote:
    
> Hello, I found [1][2] that it is possible to
>         change the compiler for C and C++ source blocks. I would like to
>         know if there is a way to add =mpirun -np 2= (where 2 can be any
>         other number) to run the resulting executable. Thanks!
>         [1]
>         https://orgmode.org/worg//org-contrib/babel/languages/ob-doc-C.html
>         [2] https://github.com/gheber/literate-hdf5
>       
    
      I guess you want to run the executable after it has been compiled,
      with a command like this one:
      
      mpirun -np 2 /tmp/babel-ad2pdk/C-bin-JTvjS4
      
      Currently it is not possible.
    
    There is the :cmdline specifier which adds
      parameters to the executable, like this:
    
    #+begin_src C++ :cmdline AAA BBB CCC
    int main (int nargs, char** argv)
    {
       // argv will be {
       //   "/tmp/babel-ad2pdk/C-bin-JTvjS4",
       //   "AAA",
       //   "BBB",
       //   "CCC"
       // }
    }
    #+end_src
    
    Those parameters come AFTER the executable,
      whereas mpirun should come BEFORE the executable.
    
    An extension may be written in ob-C.el, in
      the org-babel-C-execute function.
    The relevant line is:
      (concat tmp-bin-file cmdline)
    
      If you want to contribute...