Re: [OMPI users] cross-compilation documentation seems to be missing

[Jeff Hammond via users]

Thanks.  In half an hour I'll know how this works (my RISC-V system is
quite slow).

For others who stumble on this thread, it is "-C" not "-c".

Jeff

On Tue, Sep 7, 2021 at 3:35 PM Gilles Gouaillardet via users <
users@lists.open-mpi.org> wrote:

> Hi Jeff,
>
>
> Here is a sample file I used some times ago (some definitions might be
> missing though ...)
>
>
> In order to automatically generate this file - this is a bit of an egg
> and the chicken problem -
>
> you can run
>
> configure -c
>
> on the RISC-V node. It will generate a config.cache file.
>
> Then you can
>
> grep ^ompi_cv_fortran_ config.cache
>
> to generate the file you can pass to --with-cross when cross compiling
> on your x86 system
>
>
> Cheers,
>
>
> Gilles
>
>
> On 9/7/2021 7:35 PM, Jeff Hammond via users wrote:
> > I am attempting to cross-compile Open-MPI for RISC-V on an x86
> > system.  I get this error, with which I have some familiarity:
> >
> > checking size of Fortran CHARACTER... configure: error: Can not
> > determine size of CHARACTER when cross-compiling
> >
> > I know that I need to specify the size explicitly using a
> > cross-compilation file.  According to configure, this is documented.
> >
> > --with-cross=FILE   Specify configure values that can not be
> > determined in a cross-compilation environment. See the Open MPI FAQ.
> >
> > Where is this documented?
> > https://www.open-mpi.org/faq/?category=building
> >  contains nothing
> > relevant.
> >
> > Thanks,
> >
> > Jeff
> >
> > --
> > Jeff Hammond
> > jeff.scie...@gmail.com 
> > http://jeffhammond.github.io/ 
>


-- 
Jeff Hammond
jeff.scie...@gmail.com
http://jeffhammond.github.io/

Re: [OMPI users] cross-compilation documentation seems to be missing

[Gilles Gouaillardet via users]

Hi Jeff,


Here is a sample file I used some times ago (some definitions might be 
missing though ...)



In order to automatically generate this file - this is a bit of an egg 
and the chicken problem -


you can run

configure -c

on the RISC-V node. It will generate a config.cache file.

Then you can

grep ^ompi_cv_fortran_ config.cache

to generate the file you can pass to --with-cross when cross compiling 
on your x86 system



Cheers,


Gilles


On 9/7/2021 7:35 PM, Jeff Hammond via users wrote:
I am attempting to cross-compile Open-MPI for RISC-V on an x86 
system.  I get this error, with which I have some familiarity:


checking size of Fortran CHARACTER... configure: error: Can not 
determine size of CHARACTER when cross-compiling


I know that I need to specify the size explicitly using a 
cross-compilation file.  According to configure, this is documented.


--with-cross=FILE       Specify configure values that can not be 
determined in a cross-compilation environment. See the Open MPI FAQ.


Where is this documented? 
https://www.open-mpi.org/faq/?category=building 
 contains nothing 
relevant.


Thanks,

Jeff

--
Jeff Hammond
jeff.scie...@gmail.com 
http://jeffhammond.github.io/ 
ompi_cv_fortran_alignment_CHARACTER=${ompi_cv_fortran_alignment_CHARACTER=1}
ompi_cv_fortran_alignment_COMPLEX=${ompi_cv_fortran_alignment_COMPLEX=4}
ompi_cv_fortran_alignment_COMPLEXp16=${ompi_cv_fortran_alignment_COMPLEXp16=4}
ompi_cv_fortran_alignment_COMPLEXp32=${ompi_cv_fortran_alignment_COMPLEXp32=4}
ompi_cv_fortran_alignment_COMPLEXp8=${ompi_cv_fortran_alignment_COMPLEXp8=4}
ompi_cv_fortran_alignment_DOUBLE_COMPLEX=${ompi_cv_fortran_alignment_DOUBLE_COMPLEX=4}
ompi_cv_fortran_alignment_DOUBLE_PRECISION=${ompi_cv_fortran_alignment_DOUBLE_PRECISION=4}
ompi_cv_fortran_alignment_INTEGER=${ompi_cv_fortran_alignment_INTEGER=4}
ompi_cv_fortran_alignment_INTEGERp1=${ompi_cv_fortran_alignment_INTEGERp1=1}
ompi_cv_fortran_alignment_INTEGERp2=${ompi_cv_fortran_alignment_INTEGERp2=2}
ompi_cv_fortran_alignment_INTEGERp4=${ompi_cv_fortran_alignment_INTEGERp4=4}
ompi_cv_fortran_alignment_INTEGERp8=${ompi_cv_fortran_alignment_INTEGERp8=8}
ompi_cv_fortran_alignment_LOGICAL=${ompi_cv_fortran_alignment_LOGICAL=4}
ompi_cv_fortran_alignment_LOGICALp1=${ompi_cv_fortran_alignment_LOGICALp1=1}
ompi_cv_fortran_alignment_LOGICALp2=${ompi_cv_fortran_alignment_LOGICALp2=2}
ompi_cv_fortran_alignment_LOGICALp4=${ompi_cv_fortran_alignment_LOGICALp4=4}
ompi_cv_fortran_alignment_LOGICALp8=${ompi_cv_fortran_alignment_LOGICALp8=8}
ompi_cv_fortran_alignment_REAL=${ompi_cv_fortran_alignment_REAL=4}
ompi_cv_fortran_alignment_REALp16=${ompi_cv_fortran_alignment_REALp16=4}
ompi_cv_fortran_alignment_REALp4=${ompi_cv_fortran_alignment_REALp4=4}
ompi_cv_fortran_alignment_REALp8=${ompi_cv_fortran_alignment_REALp8=4}
ompi_cv_fortran_external_symbol=${ompi_cv_fortran_external_symbol='single 
underscore'}
ompi_cv_fortran_handle_max=${ompi_cv_fortran_handle_max=2147483647}
ompi_cv_fortran_have_CHARACTER=${ompi_cv_fortran_have_CHARACTER=yes}
ompi_cv_fortran_have_COMPLEX=${ompi_cv_fortran_have_COMPLEX=yes}
ompi_cv_fortran_have_COMPLEXp16=${ompi_cv_fortran_have_COMPLEXp16=yes}
ompi_cv_fortran_have_COMPLEXp32=${ompi_cv_fortran_have_COMPLEXp32=yes}
ompi_cv_fortran_have_COMPLEXp4=${ompi_cv_fortran_have_COMPLEXp4=no}
ompi_cv_fortran_have_COMPLEXp8=${ompi_cv_fortran_have_COMPLEXp8=yes}
ompi_cv_fortran_have_DOUBLE_COMPLEX=${ompi_cv_fortran_have_DOUBLE_COMPLEX=yes}
ompi_cv_fortran_have_DOUBLE_PRECISION=${ompi_cv_fortran_have_DOUBLE_PRECISION=yes}
ompi_cv_fortran_have_INTEGER=${ompi_cv_fortran_have_INTEGER=yes}
ompi_cv_fortran_have_INTEGERp16=${ompi_cv_fortran_have_INTEGERp16=no}
ompi_cv_fortran_have_INTEGERp1=${ompi_cv_fortran_have_INTEGERp1=yes}
ompi_cv_fortran_have_INTEGERp2=${ompi_cv_fortran_have_INTEGERp2=yes}
ompi_cv_fortran_have_INTEGERp4=${ompi_cv_fortran_have_INTEGERp4=yes}
ompi_cv_fortran_have_INTEGERp8=${ompi_cv_fortran_have_INTEGERp8=yes}
ompi_cv_fortran_have_LOGICAL=${ompi_cv_fortran_have_LOGICAL=yes}
ompi_cv_fortran_have_LOGICALp1=${ompi_cv_fortran_have_LOGICALp1=yes}
ompi_cv_fortran_have_LOGICALp2=${ompi_cv_fortran_have_LOGICALp2=yes}
ompi_cv_fortran_have_LOGICALp4=${ompi_cv_fortran_have_LOGICALp4=yes}
ompi_cv_fortran_have_LOGICALp8=${ompi_cv_fortran_have_LOGICALp8=yes}
ompi_cv_fortran_have_REAL=${ompi_cv_fortran_have_REAL=yes}
ompi_cv_fortran_have_REALp16=${ompi_cv_fortran_have_REALp16=yes}
ompi_cv_fortran_have_REALp2=${ompi_cv_fortran_have_REALp2=no}
ompi_cv_fortran_have_REALp4=${ompi_cv_fortran_have_REALp4=yes}
ompi_cv_fortran_have_REALp8=${ompi_cv_fortran_have_REALp8=yes}
ompi_cv_fortran_have_iso_c_binding=${ompi_cv_fortran_have_iso_c_binding=yes}
ompi_cv_fortran_have_iso_fortran_env=${ompi_cv_fortran_have_iso_fortran_env=yes}
ompi_cv_fortran_have_storage_size=${ompi_cv_fortran_have_storage_size=yes}

[OMPI users] cross-compilation documentation seems to be missing

[Jeff Hammond via users]

I am attempting to cross-compile Open-MPI for RISC-V on an x86 system.  I
get this error, with which I have some familiarity:

checking size of Fortran CHARACTER... configure: error: Can not determine
size of CHARACTER when cross-compiling

I know that I need to specify the size explicitly using a cross-compilation
file.  According to configure, this is documented.

--with-cross=FILE   Specify configure values that can not be determined
in a cross-compilation environment. See the Open MPI FAQ.

Where is this documented?  https://www.open-mpi.org/faq/?category=building
contains nothing relevant.

Thanks,

Jeff

--
Jeff Hammond
jeff.scie...@gmail.com
http://jeffhammond.github.io/