[Buildroot] Makefile.mk to compile using openmpi

[Marco Espinoza]

Hello

Thanks for your response.
I understand we need to add the proper CFLAGS for MPI, but I was anot able
to do the cross-compilation using CFLAGS.
Do you have a Makefile example with the proper CFLAGS to cross-compile MPI?

Thanks
Marco


2018-05-23 16:40 GMT-06:00 Arnout Vandecappelle <arnout at mind.be>:

>
>
> On 19-05-18 18:44, Marco Espinoza wrote:
> > Hello
> >
> > I'm using buildroot to generate an image for a zedboard. And I'm trying
> to
> > add an application which require openmpi compilation.
> > However I'm having issues, because my compilation is failing.
> > The issue I'm having is because my program requires mpicc compilation,
> but,
> > despite I have installed openmpi in my buildroot image, the
> > cross-compilation is not working.
> >
> > Would you please help me telling what do I need in my *.mk file, to
> > cross-compile properly using buildroot  a program which requires mpicc?
>
>  I guess you need to have an mpicc built for the host, and it looks like
> the
> openmpi build system is not really cross-compile friendly. The easiest
> approach
> is to make a host-openmpi package. But some additional work will be
> needed, to
> make sure the opal_wrapper calls the target toolchain with the appropriate
> CFLAGS instead of the host toolchain...
>
>  Regards,
>  Arnout
>
> >
> > Thanks
> > Marco Espinoza
> >
> >
> >
> > _______________________________________________
> > buildroot mailing list
> > buildroot at busybox.net
> > http://lists.busybox.net/mailman/listinfo/buildroot
> >
>
> --
> Arnout Vandecappelle                          arnout at mind be
> Senior Embedded Software Architect            +32-16-286500
> Essensium/Mind                                http://www.mind.be
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>
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