[mpich-discuss] cross compiling with mpich2-1.0.7rc2

[Anthony Chan]

Your configure command seems correct.  AFAIK, the cross-compile support in 
mpich2 is currently broken.  Even if you disable C++ support, there are 
still other problems, e.g. datatype alignment tests, that isn't done 
properly.

A.Chan

On Wed, 9 Apr 2008, Bailey, Eric wrote:

> I have an embedded PPC 7448 target, running Linux, I would like to run
> MPICH2 on that uses a cross compiler.  From what I could gather, by
> specifying the --host option with configure, this should work.  However,
> the config.log produced indicated it finds the cross compiler and it
> seems to check out initially ok.. but then it checks if this is a cross
> compiler and exits before generating any Make files.
>
> First, should / will MPICH2 support cross compilers?
> 2nd, Has anyone tried this and had success? If yes, perhaps someone can
> share the information on what needs to be done to add a host that is
> different then the build machine.
>
> This is the configure line used.
>
> /home/MPI/libraries/mpich2-1.0.7rc2/configure
> --prefix=/tmp/MPI/mpich2-1.0.7rc2-install-7448 --host=ppc74xx-linux
> --build=i686-pc-linux-gnu
>
> here is the output error message
>
> configure:11000: checking for GNU g++ version
> configure:11004: error: cannot run test program while cross compiling
> See `config.log' for more details.
>
> and here is the actual configure source lines that result in exiting, it
> does not look from this code that MPICH supports cross compiling.
>
> echo $ECHO_N "checking for GNU g++ version... $ECHO_C" >&6
>         if test "$cross_compiling" = yes; then
>  { { echo "$as_me:$LINENO: error: cannot run test program while cross
> compiling
> See \`config.log' for more details." >&5
> echo "$as_me: error: cannot run test program while cross compiling
> See \`config.log' for more details." >&2;}
>   { (exit 1); exit 1; }; }
>
> thanks,
> Eric Bailey
>
>
>