Re: Compiling Octave: HDF5 and openmpi

[Mike Miller]

On Sun, 5 Jan 2014 09:51:25 -0800, Niels wrote:
> Thanks for all the infos!!
> 
> I just found out something important for other "compiling beginners" like
> me:
> 
> Setting flags and then entering
> 
> sudo ./configure
> 
> will not work. The flags will be forgotten by the time cofigure is executed
> (in a root shell).
> 
> I had to start off with
> 
> sudo -i
> 
> and then setting all the compiler flags in the environment.

Also, you probably shouldn't be building with sudo or as the root user
at all.

> Now mpi.h will be found and I arrived at the "real" difficulties ;-).
> 
> ./.libs/liboctinterp.so: undefined reference to `ompi_mpi_cxx_op_intercept'
> ./.libs/liboctinterp.so: undefined reference to `MPI::Win::Free()'
> ./.libs/liboctinterp.so: undefined reference to `MPI::Datatype::Free()'
> ./.libs/liboctinterp.so: undefined reference to `MPI::Comm::Comm()'
> 
> Does anyone know by chance what to do now? (BTW. I can google these
> messages and find a page where somebody posted the exact same errors, but
> no solution.
> 
> Can I utter a suspicion? I think it is what was mentioned above: I will also
> have to tell the linker where to find the mpi-library. For that I would have
> to know its name and its location. I will start searching for it.

Yes, that's exactly it. I had this working at one point but it was too
much of a pain to get right so now I only build with the non-MPI HDF5
library. I recommend you do the same if you can.

-- 
mike