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# =============================================================================
# Configure support for dynamic MPI initialization
# =============================================================================
# ~~~
# Verify that NRN_ENABLE_MPI_DYNAMIC is valid and determine an include
# directory for each MPI package building libnrnmpi_<mpipkg>.so.
# Depending on the MPIs used NRNMPI_INCLUDE_<mpipkg> will be defined.
# A number of other lists needed to construct libnrnmpi_<mpipkg>.so
# are also constructed. The lists are all parallel in the sense that
# corresponding elements are related to the same mpi installation.
# ~~~
set(NRN_MPI_INCLUDE_LIST
""
CACHE INTERNAL "" FORCE)
set(NRN_MPI_LIBNAME_LIST
""
CACHE INTERNAL "" FORCE)
set(NRN_MPI_TYPE_LIST
""
CACHE INTERNAL "" FORCE)
if(NRN_ENABLE_MPI)
if(NRN_ENABLE_MPI_DYNAMIC)
set(NRNMPI_DYNAMICLOAD 1)
# compute the NRN_MPI_INCLUDE_LIST
if("${NRN_MPI_DYNAMIC}" STREQUAL "") # use the MPI already found
string(REGEX REPLACE "/$" "" foo "${MPI_C_HEADER_DIR}")
list(APPEND NRN_MPI_INCLUDE_LIST "${foo}")
else() # find the mpi's in the ';' separated list of mpi include folders.
foreach(incdir ${NRN_MPI_DYNAMIC})
# remove trailing '/' if it has one
string(REGEX REPLACE "/$" "" foo "${incdir}")
list(APPEND NRN_MPI_INCLUDE_LIST "${foo}")
endforeach(incdir)
endif()
# compute the NRN_MPI_TYPE_LIST and NRN_MPI_LIBNAME_LIST
foreach(idir ${NRN_MPI_INCLUDE_LIST})
# ${idir}/mpi.h must exist
if(NOT EXISTS "${idir}/mpi.h")
message(FATAL_ERROR "${idir}/mpi.h does not exist")
endif()
# ~~~
# Know about openmpi, mpich, ms-mpi, and a few others.
# ~~~
execute_process(COMMAND grep -q "define OPEN_MPI *1" ${idir}/mpi.h RESULT_VARIABLE result)
if(result EQUAL 0)
set(type "ompi")
else()
# ~~~
# MPT releases of hpe-mpi defines MPT_VERSION as well as SGIABI. But HMPT releases
# only defines MPT_VERSION. So first check for the existence of SGIABI to decide if a
# a given library is MPT and then check MPT_VERSION to define it as MPICH.
# ~~~
execute_process(COMMAND grep -q "define SGIABI" ${idir}/mpi.h RESULT_VARIABLE result)
if(result EQUAL 0)
set(type "mpt")
else()
execute_process(COMMAND grep -q -e "define MPICH *1" -e "define MPT_VERSION"
${idir}/mpi.h RESULT_VARIABLE result)
if(result EQUAL 0)
set(type "mpich")
else()
execute_process(COMMAND grep -q "define MSMPI_VER " ${idir}/mpi.h
RESULT_VARIABLE result)
if(result EQUAL 0)
set(type "msmpi")
else()
# Perhaps rather set the type to "unknown" and check for no duplicates?
message(
FATAL_ERROR "${idir}/mpi.h does not seem to be either openmpi, mpich, mpt or msmpi")
endif()
endif()
endif()
endif()
list(APPEND NRN_MPI_TYPE_LIST "${type}")
list(APPEND NRN_MPI_LIBNAME_LIST "nrnmpi_${type}")
endforeach(idir)
endif()
else()
if(NRN_ENABLE_MPI_DYNAMIC)
set(NRN_ENABLE_MPI_DYNAMIC "NO")
message(WARNING "NRN_ENABLE_MPI_DYNAMIC can only be set if MPI is enabled (see NRN_ENABLE_MPI)")
endif()
endif()
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