[CMake] FindMPI and setting C/C++ compiler

[Dave Partyka]

The way I have accomplished this is to:

export CC=mpicc
export CXX=mpicxx

blow away your build tree and then re-configure re-generate

On Wed, May 26, 2010 at 11:38 AM, Michael Wild <themiwi at gmail.com> wrote:

>
> On 26. May, 2010, at 17:20 , Marcel Loose wrote:
>
> > Hi all,
> >
> > I was wondering how one should use find_package(MPI) to properly set the
> > C/C++ compiler(s). Normally, you call find_package() after the project()
> > command. However, by that time the CMAKE_<LANG>_COMPILER cache variables
> > have already been set. Should one FORCE these cache variables to the
> > value of MPI_COMPILER?
> >
> > I vaguely remember that setting CMAKE_<LANG>_COMPILER after the
> > project() statement was a definite no-no, because all kinds of tests,
> > executed by the project() command, are done with the default C/C++
> > compilers.
> >
> > Best regards,
> > Marcel Loose.
>
>
> Usually mpiCC and cohorts are just wrapper scripts which add appropriate
> include directories and libraries to the command line. If I remember
> correctly, FindMPI.cmake detects those and provides them via
> MPI_COMPILE_FLAGS, MPI_INCLUDE_PATH, MPI_LINK_FLAGS and MPI_LIBRARIES. So,
> you actually don't need to set the compiler to one of the MPI compiler
> wrappers.
>
> Michael
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the CMake FAQ at:
> http://www.cmake.org/Wiki/CMake_FAQ
>
> Follow this link to subscribe/unsubscribe:
> http://www.cmake.org/mailman/listinfo/cmake
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.cmake.org/pipermail/cmake/attachments/20100526/6a118d18/attachment-0001.htm>