Commit bf1e606f authored by Christian Pfeiffer's avatar Christian Pfeiffer

FindMPI: Add support for FreeBSD and SLES

Fixes: #17117
parent 2f673da6
......@@ -989,13 +989,40 @@ macro(_MPI_check_lang_works LANG)
endif()
endmacro()
# Some systems install various MPI implementations in separate folders in some MPI prefix
# This macro enumerates all such subfolders and adds them to the list of hints that will be searched.
macro(MPI_search_mpi_prefix_folder PREFIX_FOLDER)
if(EXISTS "${PREFIX_FOLDER}")
file(GLOB _MPI_folder_children RELATIVE "${PREFIX_FOLDER}" "${PREFIX_FOLDER}/*")
foreach(_MPI_folder_child IN LISTS _MPI_folder_children)
if(IS_DIRECTORY "${PREFIX_FOLDER}/${_MPI_folder_child}")
list(APPEND MPI_HINT_DIRS "${PREFIX_FOLDER}/${_MPI_folder_child}")
endif()
endforeach()
endif()
endmacro()
set(MPI_HINT_DIRS ${MPI_HOME} $ENV{MPI_HOME} $ENV{I_MPI_ROOT})
if("${CMAKE_HOST_SYSTEM_NAME}" STREQUAL "Linux")
# SUSE Linux Enterprise Server stores its MPI implementations under /usr/lib64/mpi/gcc/<name>
# We enumerate the subfolders and append each as a prefix
MPI_search_mpi_prefix_folder("/usr/lib64/mpi/gcc")
elseif("${CMAKE_HOST_SYSTEM_NAME}" STREQUAL "Windows")
# MSMPI stores its runtime in a special folder, this adds the possible locations to the hints.
list(APPEND MPI_HINT_DIRS $ENV{MSMPI_BIN} "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\MPI;InstallRoot]")
elseif("${CMAKE_HOST_SYSTEM_NAME}" STREQUAL "FreeBSD")
# FreeBSD ships mpich under the normal system paths - but available openmpi implementations
# will be found in /usr/local/mpi/<name>
MPI_search_mpi_prefix_folder("/usr/local/mpi/")
endif()
# Most MPI distributions have some form of mpiexec or mpirun which gives us something we can look for.
# The MPI standard does not mandate the existence of either, but instead only makes requirements if a distribution
# ships an mpiexec program (mpirun executables are not regulated by the standard).
find_program(MPIEXEC_EXECUTABLE
NAMES ${_MPIEXEC_NAMES}
HINTS ${MPI_HOME} $ENV{MPI_HOME} $ENV{I_MPI_ROOT} $ENV{MSMPI_BIN}
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\MPI;InstallRoot]"
PATH_SUFFIXES bin sbin
HINTS ${MPI_HINT_DIRS}
DOC "Executable for running MPI programs.")
# call get_filename_component twice to remove mpiexec and the directory it exists in (typically bin).
......
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