[mpich-discuss] How to configure MPICH build to create linux x86 cross-compiler for ARM?

[Kenneth Raffenetti]

Hi Alex,

I don't have experience with this type of build, but I can try to 
replicate it on a system here internally. Can you provide a couple of 
artifacts first?

1. the config.log file from the top-level build directory
2. the output of 'mpicc -show' from the installed build

Thanks,
Ken

On 06/01/2017 10:00 AM, Alexander Rast wrote:
> All,
> 
> I'm trying to build MPICH so that I can cross-compile MPI applications 
> on my x86_64-linux system to run on an arm-linux machine. I want to 
> emphasise that this is different from building a native ARM MPICH 
> install that runs on ARM itself; the intent is that an x86-linux 'root' 
> process compiles ARM MPI application binaries and distributes them to 
> the ARM cores. I have a separate build for compiling the MPI binaries 
> that lie on the root x86 system. I tried running configure with 
> --build=x86_64-linux-gnu --host=x86_64-linux-gnu 
> --target=arm-linux-gnueabi, but that didn't give me what I need. If, 
> meanwhile, I try to run mpicc off the native x86 build (the MPICH 
> installation used for running MPI applications on the root x86 system) 
> it complains that the target type specified in the makefile (CFLAGS = 
> -march=armv8-a -mtune=cortex-a53) isn't supported. It's not clear how 
> one creates this sort of 'hybrid' build, running on one platform, 
> compiling MPI applications for another.
> 
> 
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