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 > > <https://www.open-mpi.org/faq/?category=building> contains nothing > > relevant. > > > > Thanks, > > > > Jeff > > > > -- > > Jeff Hammond > > jeff.scie...@gmail.com <mailto:jeff.scie...@gmail.com> > > http://jeffhammond.github.io/ <http://jeffhammond.github.io/> > -- Jeff Hammond jeff.scie...@gmail.com http://jeffhammond.github.io/
