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# =============================================================================
# Configure MPI testing support.
# FLAGS used and set for MPI testing
# VTK_MPIRUN_EXE - full path to mpirun command
# VTK_MPI_PRENUMPROC_FLAGS - flags used directly before the num. of procs flag
# VTK_MPI_NUMPROC_FLAG - flag that is used to tell this mpirun how many procs to start
# VTK_MPI_PREFLAGS - flags used directly before process to be run by mpirun
# VTK_MPI_POSTFLAGS - flags used after all other flags by mpirun
# So, tests will be run something like this:
# ${VTK_MPIRUN_EXE} ${VTK_MPI_PRENUMPROC_FLAGS} ${VTK_MPI_NUMPROC_FLAG} 2 ${VTK_MPI_PREFLAGS} executable ${VTK_MPI_POSTFLAGS}
#
# Use MPI variables defined in the CMake (2.8) FindMPI module.
if(MPIEXEC)
set(VTK_MPIRUN_EXE ${MPIEXEC} CACHE FILEPATH "The full path to mpirun command" FORCE)
set(VTK_MPI_PRENUMPROC_FLAGS ${MPIEXEC_PREFLAGS} CACHE STRING
"These flags will be directly before the number of processess flag (see ${CMAKE_CURRENT_SOURCE_DIR}/CMakeLists.txt for more info.)" FORCE)
if(NOT ${MPI_NUMPROC_FLAG})
set(VTK_MPI_NUMPROC_FLAG "-np" CACHE STRING
"Flag used by mpi to specify the number of processes, the next option will be the number of processes. (see ${CMAKE_CURRENT_SOURCE_DIR}/CMakeLists.txt for more info.)" FORCE)
else()
set(VTK_MPI_NUMPROC_FLAG ${MPIEXEC_NUMPROC_FLAG} CACHE STRING
"Flag used by mpi to specify the number of processes, the next option will be the number of processes. (see ${CMAKE_CURRENT_SOURCE_DIR}/CMakeLists.txt for more info.)" FORCE)
endif()
set(VTK_MPI_PREFLAGS ${MPIEXEC_PREFLAGS} CACHE STRING
"These flags will be directly before the executable that is being run by VTK_MPIRUN_EXE. (see ${CMAKE_CURRENT_SOURCE_DIR}/CMakeLists.txt for more info.)" FORCE)
set(VTK_MPI_POSTFLAGS ${MPIEXEC_POSTFLAGS} CACHE STRING
"These flags will come after all flags given to MPIRun.(see ${CMAKE_CURRENT_SOURCE_DIR}/CMakeLists.txt for more info.)" FORCE)
set(VTK_MPI_MAX_NUMPROCS ${MPIEXEC_MAX_NUMPROCS} CACHE STRING
"Maximum number of processors available to run parallel applications. (see ${CMAKE_CURRENT_SOURCE_DIR}/CMakeLists.txt for more info.)" FORCE)
else()
if(BUILD_TESTING)
# This is not a fatal error unless testing is enabled.
message(FATAL_ERROR "MPIEXEC was empty.")
endif()
endif()
mark_as_advanced(
VTK_MPI_PRENUMPROC_FLAGS
VTK_MPI_NUMPROC_FLAG
VTK_MPIRUN_EXE
VTK_MPI_PREFLAGS
VTK_MPI_POSTFLAGS
VTK_MPI_MAX_NUMPROCS
)
separate_arguments(VTK_MPI_PRENUMPROC_FLAGS)
separate_arguments(VTK_MPI_PREFLAGS)
separate_arguments(VTK_MPI_POSTFLAGS)
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