Hi Kelly
> I have been looking into this. For my setup, I found it useful to compare
> the CMAKE_<LANG>_COMPILER to the list of known mpi wrapper names and prepend
> _MPI_${lang}_COMPILER_NAMES with CMAKE_<LANG>_COMPILER so that the remaining
> logic in FindMPI.cmake chooses the user supplied compiler/mpi-wrapper over
> any of the other choices. Something like this:
>
> # append vendor-specific compilers to the list if we either don't know the
> compiler id,
> # or if we know it matches the regular compiler.
> foreach (lang C CXX Fortran)
> foreach (id GNU Intel PGI XL)
> if (NOT CMAKE_${lang}_COMPILER_ID OR CMAKE_${lang}_COMPILER_ID STREQUAL
> id)
> list(APPEND _MPI_${lang}_COMPILER_NAMES
> ${_MPI_${id}_${lang}_COMPILER_NAMES})
> endif()
> unset(_MPI_${id}_${lang}_COMPILER_NAMES) # clean up the namespace here
> endforeach()
>
> + # If cmake_$lang_compiler matches a known mpi compiler wrapper name,
> + # prefer the provided value.
> + get_filename_component( compiler_wo_path "${CMAKE_${lang}_COMPILER}" NAME )
> + set( ${lang}_compiler_is_mpiwrapper false )
> + foreach( mpiwrapper ${_MPI_${lang}_COMPILER_NAMES} )
> + if( "${mpiwrapper}" STREQUAL "${compiler_wo_path}" )
> + set( ${lang}_compiler_is_mpiwrapper true )
> + endif()
> + endforeach()
> + if( ${lang}_compiler_is_mpiwrapper )
> + list( REMOVE_ITEM _MPI_${lang}_COMPILER_NAMES ${compiler_wo_path} )
> + list( INSERT _MPI_${lang}_COMPILER_NAMES 0 ${compiler_wo_path} )
> + endif()
> endforeach()
checked your patch and indeed works.
In addition to that I have noticed that in the interrogate function we
never check that we can actually generate a binary with the findings,
shall we have a try_mpi_compile at the end of interrogate function?
regards
Alin
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