On Fri, Dec 08 2023, tbanelwebmin <tbanelweb...@free.fr> wrote: > Caution: This message was sent from outside the University of Manitoba. > > 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...
If you are wanting to run jobs with mpirun, then I will guess that they are relatively long-running. However, ob-C.el does not support asynchronous (background) execution, so your emacs would be tied up for the duration. I doubt you want that. I submitted an imperfect patch some time ago [1] that targeted your use case: allow ob-C.el to create a named binary. Unfortunately, Ihor dropped the issue due to lack of interest from other users. My goal was to enable something like this to work: #+begin_src cpp :includes <iostream> :results none :file ./hello-world std::cout << "Hello World!\n"; #+end_src #+begin_src bash :async t mpirun -np 4 ./hello-world #+end_src As I said, the patch I wrote was not perfect, but I am happy to re-visit the issue. The ability to create named binaries would significantly increase the usability of ob-C for projects where you want to compile the source once and run the binary repeatedly for potentially long periods of time. Leo [1] https://list.orgmode.org/87fs81egk5....@t14.reltub.ca/
