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FindMPI: MPIEXEC handling improvements

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This commit is contained in:
Christian Pfeiffer 2017-04-21 20:01:37 +02:00
parent 294cf948dc
commit 6d4fa0210e
1 changed files with 13 additions and 2 deletions
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15
Modules/FindMPI.cmake
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@ -552,10 +552,21 @@ find_program(MPIEXEC
get_filename_component(_MPI_BASE_DIR "${MPIEXEC}" PATH)
get_filename_component(_MPI_BASE_DIR "${_MPI_BASE_DIR}" PATH)
set(MPIEXEC_NUMPROC_FLAG "-np" CACHE STRING "Flag used by MPI to specify the number of processes for MPIEXEC; the next option will be the number of processes.")
# According to the MPI standard, section 8.8 -n is a guaranteed, and the only guaranteed way to
# launch an MPI process using mpiexec if such a program exists.
set(MPIEXEC_NUMPROC_FLAG "-n" CACHE STRING "Flag used by MPI to specify the number of processes for MPIEXEC; the next option will be the number of processes.")
set(MPIEXEC_PREFLAGS "" CACHE STRING "These flags will be directly before the executable that is being run by MPIEXEC.")
set(MPIEXEC_POSTFLAGS "" CACHE STRING "These flags will come after all flags given to MPIEXEC.")
set(MPIEXEC_MAX_NUMPROCS "2" CACHE STRING "Maximum number of processors available to run MPI applications.")
# Set the number of processes to the processor count and the previous default
# of 2 if that couldn't be determined.
include(${CMAKE_CURRENT_LIST_DIR}/ProcessorCount.cmake)
ProcessorCount(_MPIEXEC_NUMPROCS)
if("${_MPIEXEC_NUMPROCS}" EQUAL "0")
set(_MPIEXEC_NUMPROCS 2)
endif()
set(MPIEXEC_MAX_NUMPROCS "${_MPIEXEC_NUMPROCS}" CACHE STRING "Maximum number of processors available to run MPI applications.")
unset(_MPIEXEC_NUMPROCS)
mark_as_advanced(MPIEXEC MPIEXEC_NUMPROC_FLAG MPIEXEC_PREFLAGS MPIEXEC_POSTFLAGS MPIEXEC_MAX_NUMPROCS)