diff --git a/cmake/FindMPI.cmake b/cmake/FindMPI.cmake
new file mode 100644
index 0000000000000000000000000000000000000000..1cfc949b74354f6789760cb6ec651ba3406f233a
--- /dev/null
+++ b/cmake/FindMPI.cmake
@@ -0,0 +1,11 @@
+#------------------------------------------------------------------------------#
+# Distributed under the OSI-approved Apache License, Version 2.0. See
+# accompanying file Copyright.txt for details.
+#------------------------------------------------------------------------------#
+
+# This module is already included in new versions of CMake
+if(CMAKE_VERSION VERSION_LESS 3.10)
+ include(${CMAKE_CURRENT_LIST_DIR}/upstream/FindMPI.cmake)
+else()
+ include(${CMAKE_ROOT}/Modules/FindMPI.cmake)
+endif()
diff --git a/cmake/upstream/FindMPI.cmake b/cmake/upstream/FindMPI.cmake
new file mode 100644
index 0000000000000000000000000000000000000000..b0963130f53302b7c0f6d346fdbb80e1eb0594c4
--- /dev/null
+++ b/cmake/upstream/FindMPI.cmake
@@ -0,0 +1,1472 @@
+# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+#.rst:
+# FindMPI
+# -------
+#
+# Find a Message Passing Interface (MPI) implementation.
+#
+# The Message Passing Interface (MPI) is a library used to write
+# high-performance distributed-memory parallel applications, and is
+# typically deployed on a cluster. MPI is a standard interface (defined
+# by the MPI forum) for which many implementations are available.
+#
+# Variables for using MPI
+# ^^^^^^^^^^^^^^^^^^^^^^^
+#
+# The module exposes the components ``C``, ``CXX``, ``MPICXX`` and ``Fortran``.
+# Each of these controls the various MPI languages to search for.
+# The difference between ``CXX`` and ``MPICXX`` is that ``CXX`` refers to the
+# MPI C API being usable from C++, whereas ``MPICXX`` refers to the MPI-2 C++ API
+# that was removed again in MPI-3.
+#
+# Depending on the enabled components the following variables will be set:
+#
+# ``MPI_FOUND``
+# Variable indicating that MPI settings for all requested languages have been found.
+# If no components are specified, this is true if MPI settings for all enabled languages
+# were detected. Note that the ``MPICXX`` component does not affect this variable.
+# ``MPI_VERSION``
+# Minimal version of MPI detected among the requested languages, or all enabled languages
+# if no components were specified.
+#
+# This module will set the following variables per language in your
+# project, where ``<lang>`` is one of C, CXX, or Fortran:
+#
+# ``MPI_<lang>_FOUND``
+# Variable indicating the MPI settings for ``<lang>`` were found and that
+# simple MPI test programs compile with the provided settings.
+# ``MPI_<lang>_COMPILER``
+# MPI compiler for ``<lang>`` if such a program exists.
+# ``MPI_<lang>_COMPILE_OPTIONS``
+# Compilation options for MPI programs in ``<lang>``, given as a :ref:`;-list <CMake Language Lists>`.
+# ``MPI_<lang>_COMPILE_DEFINITIONS``
+# Compilation definitions for MPI programs in ``<lang>``, given as a :ref:`;-list <CMake Language Lists>`.
+# ``MPI_<lang>_INCLUDE_DIRS``
+# Include path(s) for MPI header.
+# ``MPI_<lang>_LINK_FLAGS``
+# Linker flags for MPI programs.
+# ``MPI_<lang>_LIBRARIES``
+# All libraries to link MPI programs against.
+#
+# Additionally, the following :prop_tgt:`IMPORTED` targets are defined:
+#
+# ``MPI::MPI_<lang>``
+# Target for using MPI from ``<lang>``.
+#
+# The following variables indicating which bindings are present will be defined:
+#
+# ``MPI_MPICXX_FOUND``
+# Variable indicating whether the MPI-2 C++ bindings are present (introduced in MPI-2, removed with MPI-3).
+# ``MPI_Fortran_HAVE_F77_HEADER``
+# True if the Fortran 77 header ``mpif.h`` is available.
+# ``MPI_Fortran_HAVE_F90_MODULE``
+# True if the Fortran 90 module ``mpi`` can be used for accessing MPI (MPI-2 and higher only).
+# ``MPI_Fortran_HAVE_F08_MODULE``
+# True if the Fortran 2008 ``mpi_f08`` is available to MPI programs (MPI-3 and higher only).
+#
+# If possible, the MPI version will be determined by this module. The facilities to detect the MPI version
+# were introduced with MPI-1.2, and therefore cannot be found for older MPI versions.
+#
+# ``MPI_<lang>_VERSION_MAJOR``
+# Major version of MPI implemented for ``<lang>`` by the MPI distribution.
+# ``MPI_<lang>_VERSION_MINOR``
+# Minor version of MPI implemented for ``<lang>`` by the MPI distribution.
+# ``MPI_<lang>_VERSION``
+# MPI version implemented for ``<lang>`` by the MPI distribution.
+#
+# Note that there's no variable for the C bindings being accessible through ``mpi.h``, since the MPI standards
+# always have required this binding to work in both C and C++ code.
+#
+# For running MPI programs, the module sets the following variables
+#
+# ``MPIEXEC_EXECUTABLE``
+# Executable for running MPI programs, if such exists.
+# ``MPIEXEC_NUMPROC_FLAG``
+# Flag to pass to ``mpiexec`` before giving it the number of processors to run on.
+# ``MPIEXEC_MAX_NUMPROCS``
+# Number of MPI processors to utilize. Defaults to the number
+# of processors detected on the host system.
+# ``MPIEXEC_PREFLAGS``
+# Flags to pass to ``mpiexec`` directly before the executable to run.
+# ``MPIEXEC_POSTFLAGS``
+# Flags to pass to ``mpiexec`` after other flags.
+#
+# Variables for locating MPI
+# ^^^^^^^^^^^^^^^^^^^^^^^^^^
+#
+# This module performs a three step search for an MPI implementation:
+#
+# 1. Check if the compiler has MPI support built-in. This is the case if the user passed a
+# compiler wrapper as ``CMAKE_<LANG>_COMPILER`` or if they're on a Cray system.
+# 2. Attempt to find an MPI compiler wrapper and determine the compiler information from it.
+# 3. Try to find an MPI implementation that does not ship such a wrapper by guessing settings.
+# Currently, only Microsoft MPI and MPICH2 on Windows are supported.
+#
+# For controlling the second step, the following variables may be set:
+#
+# ``MPI_<lang>_COMPILER``
+# Search for the specified compiler wrapper and use it.
+# ``MPI_<lang>_COMPILER_FLAGS``
+# Flags to pass to the MPI compiler wrapper during interrogation. Some compiler wrappers
+# support linking debug or tracing libraries if a specific flag is passed and this variable
+# may be used to obtain them.
+# ``MPI_COMPILER_FLAGS``
+# Used to initialize ``MPI_<lang>_COMPILER_FLAGS`` if no language specific flag has been given.
+# Empty by default.
+# ``MPI_EXECUTABLE_SUFFIX``
+# A suffix which is appended to all names that are being looked for. For instance you may set this
+# to ``.mpich`` or ``.openmpi`` to prefer the one or the other on Debian and its derivatives.
+#
+# In order to control the guessing step, the following variable may be set:
+#
+# ``MPI_GUESS_LIBRARY_NAME``
+# Valid values are ``MSMPI`` and ``MPICH2``. If set, only the given library will be searched for.
+# By default, ``MSMPI`` will be preferred over ``MPICH2`` if both are available.
+# This also sets ``MPI_SKIP_COMPILER_WRAPPER`` to ``true``, which may be overridden.
+#
+# Each of the search steps may be skipped with the following control variables:
+#
+# ``MPI_ASSUME_NO_BUILTIN_MPI``
+# If true, the module assumes that the compiler itself does not provide an MPI implementation and
+# skips to step 2.
+# ``MPI_SKIP_COMPILER_WRAPPER``
+# If true, no compiler wrapper will be searched for.
+# ``MPI_SKIP_GUESSING``
+# If true, the guessing step will be skipped.
+#
+# Additionally, the following control variable is available to change search behavior:
+#
+# ``MPI_CXX_SKIP_MPICXX``
+# Add some definitions that will disable the MPI-2 C++ bindings.
+# Currently supported are MPICH, Open MPI, Platform MPI and derivatives thereof,
+# for example MVAPICH or Intel MPI.
+#
+# If the find procedure fails for a variable ``MPI_<lang>_WORKS``, then the settings detected by or passed to
+# the module did not work and even a simple MPI test program failed to compile.
+#
+# If all of these parameters were not sufficient to find the right MPI implementation, a user may
+# disable the entire autodetection process by specifying both a list of libraries in ``MPI_<lang>_LIBRARIES``
+# and a list of include directories in ``MPI_<lang>_ADDITIONAL_INCLUDE_DIRS``.
+# Any other variable may be set in addition to these two. The module will then validate the MPI settings and store the
+# settings in the cache.
+#
+# Cache variables for MPI
+# ^^^^^^^^^^^^^^^^^^^^^^^
+#
+# The variable ``MPI_<lang>_INCLUDE_DIRS`` will be assembled from the following variables.
+# For C and CXX:
+#
+# ``MPI_<lang>_HEADER_DIR``
+# Location of the ``mpi.h`` header on disk.
+#
+# For Fortran:
+#
+# ``MPI_Fortran_F77_HEADER_DIR``
+# Location of the Fortran 77 header ``mpif.h``, if it exists.
+# ``MPI_Fortran_MODULE_DIR``
+# Location of the ``mpi`` or ``mpi_f08`` modules, if available.
+#
+# For all languages the following variables are additionally considered:
+#
+# ``MPI_<lang>_ADDITIONAL_INCLUDE_DIRS``
+# A :ref:`;-list <CMake Language Lists>` of paths needed in addition to the normal include directories.
+# ``MPI_<include_name>_INCLUDE_DIR``
+# Path variables for include folders referred to by ``<include_name>``.
+# ``MPI_<lang>_ADDITIONAL_INCLUDE_VARS``
+# A :ref:`;-list <CMake Language Lists>` of ``<include_name>`` that will be added to the include locations of ``<lang>``.
+#
+# The variable ``MPI_<lang>_LIBRARIES`` will be assembled from the following variables:
+#
+# ``MPI_<lib_name>_LIBRARY``
+# The location of a library called ``<lib_name>`` for use with MPI.
+# ``MPI_<lang>_LIB_NAMES``
+# A :ref:`;-list <CMake Language Lists>` of ``<lib_name>`` that will be added to the include locations of ``<lang>``.
+#
+# Usage of mpiexec
+# ^^^^^^^^^^^^^^^^
+#
+# When using ``MPIEXEC_EXECUTABLE`` to execute MPI applications, you should typically
+# use all of the ``MPIEXEC_EXECUTABLE`` flags as follows:
+#
+# ::
+#
+# ${MPIEXEC_EXECUTABLE} ${MPIEXEC_NUMPROC_FLAG} ${MPIEXEC_MAX_NUMPROCS}
+# ${MPIEXEC_PREFLAGS} EXECUTABLE ${MPIEXEC_POSTFLAGS} ARGS
+#
+# where ``EXECUTABLE`` is the MPI program, and ``ARGS`` are the arguments to
+# pass to the MPI program.
+#
+# Advanced variables for using MPI
+# ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+#
+# The module can perform some advanced feature detections upon explicit request.
+#
+# **Important notice:** The following checks cannot be performed without *executing* an MPI test program.
+# Consider the special considerations for the behavior of :command:`try_run` during cross compilation.
+# Moreover, running an MPI program can cause additional issues, like a firewall notification on some systems.
+# You should only enable these detections if you absolutely need the information.
+#
+# If the following variables are set to true, the respective search will be performed:
+#
+# ``MPI_DETERMINE_Fortran_CAPABILITIES``
+# Determine for all available Fortran bindings what the values of ``MPI_SUBARRAYS_SUPPORTED`` and
+# ``MPI_ASYNC_PROTECTS_NONBLOCKING`` are and make their values available as ``MPI_Fortran_<binding>_SUBARRAYS``
+# and ``MPI_Fortran_<binding>_ASYNCPROT``, where ``<binding>`` is one of ``F77_HEADER``, ``F90_MODULE`` and
+# ``F08_MODULE``.
+# ``MPI_DETERMINE_LIBRARY_VERSION``
+# For each language, find the output of ``MPI_Get_library_version`` and make it available as ``MPI_<lang>_LIBRARY_VERSION``.
+# This information is usually tied to the runtime component of an MPI implementation and might differ depending on ``<lang>``.
+# Note that the return value is entirely implementation defined. This information might be used to identify
+# the MPI vendor and for example pick the correct one of multiple third party binaries that matches the MPI vendor.
+#
+# Backward Compatibility
+# ^^^^^^^^^^^^^^^^^^^^^^
+#
+# For backward compatibility with older versions of FindMPI, these
+# variables are set, but deprecated:
+#
+# ::
+#
+# MPI_COMPILER MPI_LIBRARY MPI_EXTRA_LIBRARY
+# MPI_COMPILE_FLAGS MPI_INCLUDE_PATH MPI_LINK_FLAGS
+# MPI_LIBRARIES
+#
+# In new projects, please use the ``MPI_<lang>_XXX`` equivalents.
+# Additionally, the following variables are deprecated:
+#
+# ``MPI_<lang>_COMPILE_FLAGS``
+# Use ``MPI_<lang>_COMPILE_OPTIONS`` and ``MPI_<lang>_COMPILE_DEFINITIONS`` instead.
+# ``MPI_<lang>_INCLUDE_PATH``
+# For consumption use ``MPI_<lang>_INCLUDE_DIRS`` and for specifying folders use ``MPI_<lang>_ADDITIONAL_INCLUDE_DIRS`` instead.
+# ``MPIEXEC``
+# Use ``MPIEXEC_EXECUTABLE`` instead.
+
+cmake_policy(PUSH)
+cmake_policy(SET CMP0057 NEW) # if IN_LIST
+
+include(FindPackageHandleStandardArgs)
+
+# Generic compiler names
+set(_MPI_C_GENERIC_COMPILER_NAMES mpicc mpcc mpicc_r mpcc_r)
+set(_MPI_CXX_GENERIC_COMPILER_NAMES mpicxx mpiCC mpcxx mpCC mpic++ mpc++
+ mpicxx_r mpiCC_r mpcxx_r mpCC_r mpic++_r mpc++_r)
+set(_MPI_Fortran_GENERIC_COMPILER_NAMES mpif95 mpif95_r mpf95 mpf95_r
+ mpif90 mpif90_r mpf90 mpf90_r
+ mpif77 mpif77_r mpf77 mpf77_r
+ mpifc)
+
+# GNU compiler names
+set(_MPI_GNU_C_COMPILER_NAMES mpigcc mpgcc mpigcc_r mpgcc_r)
+set(_MPI_GNU_CXX_COMPILER_NAMES mpig++ mpg++ mpig++_r mpg++_r mpigxx)
+set(_MPI_GNU_Fortran_COMPILER_NAMES mpigfortran mpgfortran mpigfortran_r mpgfortran_r
+ mpig77 mpig77_r mpg77 mpg77_r)
+
+# Intel MPI compiler names on Windows
+if(WIN32)
+ list(APPEND _MPI_C_GENERIC_COMPILER_NAMES mpicc.bat)
+ list(APPEND _MPI_CXX_GENERIC_COMPILER_NAMES mpicxx.bat)
+ list(APPEND _MPI_Fortran_GENERIC_COMPILER_NAMES mpifc.bat)
+
+ # Intel MPI compiler names
+ set(_MPI_Intel_C_COMPILER_NAMES mpiicc.bat)
+ set(_MPI_Intel_CXX_COMPILER_NAMES mpiicpc.bat)
+ set(_MPI_Intel_Fortran_COMPILER_NAMES mpiifort.bat mpif77.bat mpif90.bat)
+
+ # Intel MPI compiler names for MSMPI
+ set(_MPI_MSVC_C_COMPILER_NAMES mpicl.bat)
+ set(_MPI_MSVC_CXX_COMPILER_NAMES mpicl.bat)
+else()
+ # Intel compiler names
+ set(_MPI_Intel_C_COMPILER_NAMES mpiicc)
+ set(_MPI_Intel_CXX_COMPILER_NAMES mpiicpc mpiicxx mpiic++)
+ set(_MPI_Intel_Fortran_COMPILER_NAMES mpiifort mpiif95 mpiif90 mpiif77)
+endif()
+
+# PGI compiler names
+set(_MPI_PGI_C_COMPILER_NAMES mpipgcc mppgcc)
+set(_MPI_PGI_CXX_COMPILER_NAMES mpipgCC mppgCC)
+set(_MPI_PGI_Fortran_COMPILER_NAMES mpipgf95 mpipgf90 mppgf95 mppgf90 mpipgf77 mppgf77)
+
+# XLC MPI Compiler names
+set(_MPI_XL_C_COMPILER_NAMES mpxlc mpxlc_r mpixlc mpixlc_r)
+set(_MPI_XL_CXX_COMPILER_NAMES mpixlcxx mpixlC mpixlc++ mpxlcxx mpxlc++ mpixlc++ mpxlCC
+ mpixlcxx_r mpixlC_r mpixlc++_r mpxlcxx_r mpxlc++_r mpixlc++_r mpxlCC_r)
+set(_MPI_XL_Fortran_COMPILER_NAMES mpixlf95 mpixlf95_r mpxlf95 mpxlf95_r
+ mpixlf90 mpixlf90_r mpxlf90 mpxlf90_r
+ mpixlf77 mpixlf77_r mpxlf77 mpxlf77_r
+ mpixlf mpixlf_r mpxlf mpxlf_r)
+
+# Helper variable for command seeperation
+if(WIN32)
+ set(_MPI_COMMAND_TYPE WINDOWS_COMMAND)
+else()
+ set(_MPI_COMMAND_TYPE UNIX_COMMAND)
+endif()
+
+# Prepend vendor-specific compiler wrappers to the list. If we don't know the compiler,
+# attempt all of them.
+# By attempting vendor-specific compiler names first, we should avoid situations where the compiler wrapper
+# stems from a proprietary MPI and won't know which compiler it's being used for. For instance, Intel MPI
+# controls its settings via the I_MPI_CC environment variables if the generic name is being used.
+# If we know which compiler we're working with, we can use the most specialized wrapper there is in order to
+# pick up the right settings for it.
+foreach (LANG IN ITEMS C CXX Fortran)
+ set(_MPI_${LANG}_COMPILER_NAMES "")
+ foreach (id IN ITEMS GNU Intel MSVC PGI XL)
+ if (NOT CMAKE_${LANG}_COMPILER_ID OR CMAKE_${LANG}_COMPILER_ID STREQUAL id)
+ list(APPEND _MPI_${LANG}_COMPILER_NAMES ${_MPI_${id}_${LANG}_COMPILER_NAMES}${MPI_EXECUTABLE_SUFFIX})
+ endif()
+ unset(_MPI_${id}_${LANG}_COMPILER_NAMES)
+ endforeach()
+ list(APPEND _MPI_${LANG}_COMPILER_NAMES ${_MPI_${LANG}_GENERIC_COMPILER_NAMES}${MPI_EXECUTABLE_SUFFIX})
+ unset(_MPI_${LANG}_GENERIC_COMPILER_NAMES)
+endforeach()
+
+# Names to try for mpiexec
+# Only mpiexec commands are guaranteed to behave as described in the standard,
+# mpirun commands are not covered by the standard in any way whatsoever.
+# lamexec is the executable for LAM/MPI, srun is for SLURM or Open MPI with SLURM support.
+# srun -n X <executable> is however a valid command, so it behaves 'like' mpiexec.
+set(_MPIEXEC_NAMES_BASE mpiexec mpiexec.hydra mpiexec.mpd mpirun lamexec srun)
+
+unset(_MPIEXEC_NAMES)
+foreach(_MPIEXEC_NAME IN LISTS _MPIEXEC_NAMES_BASE)
+ list(APPEND _MPIEXEC_NAMES "${_MPIEXEC_NAME}${MPI_EXECUTABLE_SUFFIX}")
+endforeach()
+unset(_MPIEXEC_NAMES_BASE)
+
+function (_MPI_check_compiler LANG QUERY_FLAG OUTPUT_VARIABLE RESULT_VARIABLE)
+ if(DEFINED MPI_${LANG}_COMPILER_FLAGS)
+ separate_arguments(_MPI_COMPILER_WRAPPER_OPTIONS ${_MPI_COMMAND_TYPE} "${MPI_${LANG}_COMPILER_FLAGS}")
+ else()
+ separate_arguments(_MPI_COMPILER_WRAPPER_OPTIONS ${_MPI_COMMAND_TYPE} "${MPI_COMPILER_FLAGS}")
+ endif()
+ execute_process(
+ COMMAND ${MPI_${LANG}_COMPILER} ${_MPI_COMPILER_WRAPPER_OPTIONS} ${QUERY_FLAG}
+ OUTPUT_VARIABLE WRAPPER_OUTPUT OUTPUT_STRIP_TRAILING_WHITESPACE
+ ERROR_VARIABLE WRAPPER_OUTPUT ERROR_STRIP_TRAILING_WHITESPACE
+ RESULT_VARIABLE WRAPPER_RETURN)
+ # Some compiler wrappers will yield spurious zero return values, for example
+ # Intel MPI tolerates unknown arguments and if the MPI wrappers loads a shared
+ # library that has invalid or missing version information there would be warning
+ # messages emitted by ld.so in the compiler output. In either case, we'll treat
+ # the output as invalid.
+ if("${WRAPPER_OUTPUT}" MATCHES "undefined reference|unrecognized|need to set|no version information available")
+ set(WRAPPER_RETURN 255)
+ endif()
+ # Ensure that no error output might be passed upwards.
+ if(NOT WRAPPER_RETURN EQUAL 0)
+ unset(WRAPPER_OUTPUT)
+ endif()
+ set(${OUTPUT_VARIABLE} "${WRAPPER_OUTPUT}" PARENT_SCOPE)
+ set(${RESULT_VARIABLE} "${WRAPPER_RETURN}" PARENT_SCOPE)
+endfunction()
+
+function (_MPI_interrogate_compiler lang)
+ unset(MPI_COMPILE_CMDLINE)
+ unset(MPI_LINK_CMDLINE)
+
+ unset(MPI_COMPILE_OPTIONS_WORK)
+ unset(MPI_COMPILE_DEFINITIONS_WORK)
+ unset(MPI_INCLUDE_DIRS_WORK)
+ unset(MPI_LINK_FLAGS_WORK)
+ unset(MPI_LIB_NAMES_WORK)
+ unset(MPI_LIB_FULLPATHS_WORK)
+
+ # Check whether the -showme:compile option works. This indicates that we have either Open MPI
+ # or a newer version of LAM/MPI, and implies that -showme:link will also work.
+ # Open MPI also supports -show, but separates linker and compiler information
+ _MPI_check_compiler(${LANG} "-showme:compile" MPI_COMPILE_CMDLINE MPI_COMPILER_RETURN)
+ if (MPI_COMPILER_RETURN EQUAL 0)
+ _MPI_check_compiler(${LANG} "-showme:link" MPI_LINK_CMDLINE MPI_COMPILER_RETURN)
+
+ if (NOT MPI_COMPILER_RETURN EQUAL 0)
+ unset(MPI_COMPILE_CMDLINE)
+ endif()
+ endif()
+
+ # MPICH and MVAPICH offer -compile-info and -link-info.
+ # For modern versions, both do the same as -show. However, for old versions, they do differ
+ # when called for mpicxx and mpif90 and it's necessary to use them over -show in order to find the
+ # removed MPI C++ bindings.
+ if (NOT MPI_COMPILER_RETURN EQUAL 0)
+ _MPI_check_compiler(${LANG} "-compile-info" MPI_COMPILE_CMDLINE MPI_COMPILER_RETURN)
+
+ if (MPI_COMPILER_RETURN EQUAL 0)
+ _MPI_check_compiler(${LANG} "-link-info" MPI_LINK_CMDLINE MPI_COMPILER_RETURN)
+
+ if (NOT MPI_COMPILER_RETURN EQUAL 0)
+ unset(MPI_COMPILE_CMDLINE)
+ endif()
+ endif()
+ endif()
+
+ # MPICH, MVAPICH2 and Intel MPI just use "-show". Open MPI also offers this, but the
+ # -showme commands are more specialized.
+ if (NOT MPI_COMPILER_RETURN EQUAL 0)
+ _MPI_check_compiler(${LANG} "-show" MPI_COMPILE_CMDLINE MPI_COMPILER_RETURN)
+ endif()
+
+ # Older versions of LAM/MPI have "-showme". Open MPI also supports this.
+ # Unknown to MPICH, MVAPICH and Intel MPI.
+ if (NOT MPI_COMPILER_RETURN EQUAL 0)
+ _MPI_check_compiler(${LANG} "-showme" MPI_COMPILE_CMDLINE MPI_COMPILER_RETURN)
+ endif()
+
+ if (NOT (MPI_COMPILER_RETURN EQUAL 0) OR NOT (DEFINED MPI_COMPILE_CMDLINE))
+ # Cannot interrogate this compiler, so exit.
+ set(MPI_${LANG}_WRAPPER_FOUND FALSE PARENT_SCOPE)
+ return()
+ endif()
+ unset(MPI_COMPILER_RETURN)
+
+ # We have our command lines, but we might need to copy MPI_COMPILE_CMDLINE
+ # into MPI_LINK_CMDLINE, if we didn't find the link line.
+ if (NOT DEFINED MPI_LINK_CMDLINE)
+ set(MPI_LINK_CMDLINE "${MPI_COMPILE_CMDLINE}")
+ endif()
+
+ # At this point, we obtained some output from a compiler wrapper that works.
+ # We'll now try to parse it into variables with meaning to us.
+ if("${LANG}" STREQUAL "Fortran")
+ # Some MPICH-1 and MVAPICH-1 versions return a three command answer for Fortran, consisting
+ # out of a symlink command for mpif.h, the actual compiler command and a deletion of the
+ # created symlink. We need to detect that case, remember the include path and drop the
+ # symlink/deletion operation to obtain the link/compile lines we'd usually expect.
+ if("${MPI_COMPILE_CMDLINE}" MATCHES "^ln -s ([^\" ]+|\"[^\"]+\") mpif.h")
+ get_filename_component(MPI_INCLUDE_DIRS_WORK "${CMAKE_MATCH_1}" DIRECTORY)
+ string(REGEX REPLACE "^ln -s ([^\" ]+|\"[^\"]+\") mpif.h\n" "" MPI_COMPILE_CMDLINE "${MPI_COMPILE_CMDLINE}")
+ string(REGEX REPLACE "^ln -s ([^\" ]+|\"[^\"]+\") mpif.h\n" "" MPI_LINK_CMDLINE "${MPI_LINK_CMDLINE}")
+ string(REGEX REPLACE "\nrm -f mpif.h$" "" MPI_COMPILE_CMDLINE "${MPI_COMPILE_CMDLINE}")
+ string(REGEX REPLACE "\nrm -f mpif.h$" "" MPI_LINK_CMDLINE "${MPI_LINK_CMDLINE}")
+ endif()
+ endif()
+
+ # The Intel MPI wrapper on Linux will emit some objcopy commands after its compile command
+ # if -static_mpi was passed to the wrapper. To avoid spurious matches, we need to drop these lines.
+ if(UNIX)
+ string(REGEX REPLACE "(^|\n)objcopy[^\n]+(\n|$)" "" MPI_COMPILE_CMDLINE "${MPI_COMPILE_CMDLINE}")
+ string(REGEX REPLACE "(^|\n)objcopy[^\n]+(\n|$)" "" MPI_LINK_CMDLINE "${MPI_LINK_CMDLINE}")
+ endif()
+
+ # Extract compile options from the compile command line.
+ string(REGEX MATCHALL "(^| )-f([^\" ]+|\"[^\"]+\")" MPI_ALL_COMPILE_OPTIONS "${MPI_COMPILE_CMDLINE}")
+
+ foreach(_MPI_COMPILE_OPTION IN LISTS MPI_ALL_COMPILE_OPTIONS)
+ string(REGEX REPLACE "^ " "" _MPI_COMPILE_OPTION "${_MPI_COMPILE_OPTION}")
+ # Ignore -fstack-protector directives: These occur on MPICH and MVAPICH when the libraries
+ # themselves were built with this flag. However, this flag is unrelated to using MPI, and
+ # we won't match the accompanying --param-ssp-size and -Wp,-D_FORTIFY_SOURCE flags and therefore
+ # produce inconsistent results with the regularly flags.
+ # Similarly, aliasing flags do not belong into our flag array.
+ if(NOT "${_MPI_COMPILE_OPTION}" MATCHES "^-f(stack-protector|(no-|)strict-aliasing|PI[CE]|pi[ce])")
+ list(APPEND MPI_COMPILE_OPTIONS_WORK "${_MPI_COMPILE_OPTION}")
+ endif()
+ endforeach()
+
+ # Same deal, with the definitions. We also treat arguments passed to the preprocessor directly.
+ string(REGEX MATCHALL "(^| )(-Wp,|-Xpreprocessor |)[-/]D([^\" ]+|\"[^\"]+\")" MPI_ALL_COMPILE_DEFINITIONS "${MPI_COMPILE_CMDLINE}")
+
+ foreach(_MPI_COMPILE_DEFINITION IN LISTS MPI_ALL_COMPILE_DEFINITIONS)
+ string(REGEX REPLACE "^ ?(-Wp,|-Xpreprocessor )?[-/]D" "" _MPI_COMPILE_DEFINITION "${_MPI_COMPILE_DEFINITION}")
+ string(REPLACE "\"" "" _MPI_COMPILE_DEFINITION "${_MPI_COMPILE_DEFINITION}")
+ if(NOT "${_MPI_COMPILE_DEFINITION}" MATCHES "^_FORTIFY_SOURCE.*")
+ list(APPEND MPI_COMPILE_DEFINITIONS_WORK "${_MPI_COMPILE_DEFINITION}")
+ endif()
+ endforeach()
+
+ # Extract include paths from compile command line
+ string(REGEX MATCHALL "(^| )[-/]I([^\" ]+|\"[^\"]+\")" MPI_ALL_INCLUDE_PATHS "${MPI_COMPILE_CMDLINE}")
+
+ foreach(_MPI_INCLUDE_PATH IN LISTS MPI_ALL_INCLUDE_PATHS)
+ string(REGEX REPLACE "^ ?[-/]I" "" _MPI_INCLUDE_PATH "${_MPI_INCLUDE_PATH}")
+ string(REPLACE "//" "/" _MPI_INCLUDE_PATH "${_MPI_INCLUDE_PATH}")
+ get_filename_component(_MPI_INCLUDE_PATH "${_MPI_INCLUDE_PATH}" REALPATH)
+ list(APPEND MPI_INCLUDE_DIRS_WORK "${_MPI_INCLUDE_PATH}")
+ endforeach()
+
+ # If extracting failed to work, we'll try using -showme:incdirs.
+ if (NOT MPI_INCLUDE_DIRS_WORK)
+ _MPI_check_compiler(${LANG} "-showme:incdirs" MPI_INCDIRS_CMDLINE MPI_INCDIRS_COMPILER_RETURN)
+ if(MPI_INCDIRS_COMPILER_RETURN)
+ separate_arguments(MPI_INCLUDE_DIRS_WORK ${_MPI_COMMAND_TYPE} "${MPI_INCDIRS_CMDLINE}")
+ endif()
+ endif()
+
+ # Extract linker paths from the link command line
+ string(REGEX MATCHALL "(^| )(-Wl,|-Xlinker |)(-L|[/-]LIBPATH:|[/-]libpath:)([^\" ]+|\"[^\"]+\")" MPI_ALL_LINK_PATHS "${MPI_LINK_CMDLINE}")
+
+ foreach(_MPI_LPATH IN LISTS MPI_ALL_LINK_PATHS)
+ string(REGEX REPLACE "^ ?(-Wl,|-Xlinker )?(-L|[/-]LIBPATH:|[/-]libpath:)" "" _MPI_LPATH "${_MPI_LPATH}")
+ string(REPLACE "//" "/" _MPI_LPATH "${_MPI_LPATH}")
+ get_filename_component(_MPI_LPATH "${_MPI_LPATH}" REALPATH)
+ list(APPEND MPI_LINK_DIRECTORIES_WORK "${_MPI_LPATH}")
+ endforeach()
+
+ # If extracting failed to work, we'll try using -showme:libdirs.
+ if (NOT MPI_LINK_DIRECTORIES_WORK)
+ _MPI_check_compiler(${LANG} "-showme:libdirs" MPI_LIBDIRS_CMDLINE MPI_LIBDIRS_COMPILER_RETURN)
+ if(MPI_LIBDIRS_COMPILER_RETURN)
+ separate_arguments(MPI_LINK_DIRECTORIES_WORK ${_MPI_COMMAND_TYPE} "${MPI_LIBDIRS_CMDLINE}")
+ endif()
+ endif()
+
+ # Extract linker flags from the link command line
+ string(REGEX MATCHALL "(^| )(-Wl,|-Xlinker )([^\" ]+|\"[^\"]+\")" MPI_ALL_LINK_FLAGS "${MPI_LINK_CMDLINE}")
+
+ foreach(_MPI_LINK_FLAG IN LISTS MPI_ALL_LINK_FLAGS)
+ string(STRIP "${_MPI_LINK_FLAG}" _MPI_LINK_FLAG)
+ # MPI might be marked to build with non-executable stacks but this should not propagate.
+ if (NOT "${_MPI_LINK_FLAG}" MATCHES "(-Wl,|-Xlinker )-z,noexecstack")
+ if (MPI_LINK_FLAGS_WORK)
+ string(APPEND MPI_LINK_FLAGS_WORK " ${_MPI_LINK_FLAG}")
+ else()
+ set(MPI_LINK_FLAGS_WORK "${_MPI_LINK_FLAG}")
+ endif()
+ endif()
+ endforeach()
+
+ # Extract the set of libraries to link against from the link command
+ # line
+ string(REGEX MATCHALL "(^| )-l([^\" ]+|\"[^\"]+\")" MPI_LIBNAMES "${MPI_LINK_CMDLINE}")
+
+ foreach(_MPI_LIB_NAME IN LISTS MPI_LIBNAMES)
+ string(REGEX REPLACE "^ ?-l" "" _MPI_LIB_NAME "${_MPI_LIB_NAME}")
+ string(REPLACE "\"" "" _MPI_LIB_NAME "${_MPI_LIB_NAME}")
+ get_filename_component(_MPI_LIB_PATH "${_MPI_LIB_NAME}" DIRECTORY)
+ if(NOT "${_MPI_LIB_PATH}" STREQUAL "")
+ list(APPEND MPI_LIB_FULLPATHS_WORK "${_MPI_LIB_NAME}")
+ else()
+ list(APPEND MPI_LIB_NAMES_WORK "${_MPI_LIB_NAME}")
+ endif()
+ endforeach()
+
+ if(WIN32)
+ # A compiler wrapper on Windows will just have the name of the
+ # library to link on its link line, potentially with a full path
+ string(REGEX MATCHALL "(^| )([^\" ]+\\.lib|\"[^\"]+\\.lib\")" MPI_LIBNAMES "${MPI_LINK_CMDLINE}")
+ foreach(_MPI_LIB_NAME IN LISTS MPI_LIBNAMES)
+ string(REGEX REPLACE "^ " "" _MPI_LIB_NAME "${_MPI_LIB_NAME}")
+ string(REPLACE "\"" "" _MPI_LIB_NAME "${_MPI_LIB_NAME}")
+ get_filename_component(_MPI_LIB_PATH "${_MPI_LIB_NAME}" DIRECTORY)
+ if(NOT "${_MPI_LIB_PATH}" STREQUAL "")
+ list(APPEND MPI_LIB_FULLPATHS_WORK "${_MPI_LIB_NAME}")
+ else()
+ list(APPEND MPI_LIB_NAMES_WORK "${_MPI_LIB_NAME}")
+ endif()
+ endforeach()
+ else()
+ # On UNIX platforms, archive libraries can be given with full path.
+ string(REGEX MATCHALL "(^| )([^\" ]+\\.a|\"[^\"]+\\.a\")" MPI_LIBFULLPATHS "${MPI_LINK_CMDLINE}")
+ foreach(_MPI_LIB_NAME IN LISTS MPI_LIBFULLPATHS)
+ string(REGEX REPLACE "^ " "" _MPI_LIB_NAME "${_MPI_LIB_NAME}")
+ string(REPLACE "\"" "" _MPI_LIB_NAME "${_MPI_LIB_NAME}")
+ get_filename_component(_MPI_LIB_PATH "${_MPI_LIB_NAME}" DIRECTORY)
+ if(NOT "${_MPI_LIB_PATH}" STREQUAL "")
+ list(APPEND MPI_LIB_FULLPATHS_WORK "${_MPI_LIB_NAME}")
+ else()
+ list(APPEND MPI_LIB_NAMES_WORK "${_MPI_LIB_NAME}")
+ endif()
+ endforeach()
+ endif()
+
+ # An MPI compiler wrapper could have its MPI libraries in the implictly
+ # linked directories of the compiler itself.
+ if(DEFINED CMAKE_${LANG}_IMPLICIT_LINK_DIRECTORIES)
+ list(APPEND MPI_LINK_DIRECTORIES_WORK "${CMAKE_${LANG}_IMPLICIT_LINK_DIRECTORIES}")
+ endif()
+
+ # Determine full path names for all of the libraries that one needs
+ # to link against in an MPI program
+ unset(MPI_PLAIN_LIB_NAMES_WORK)
+ foreach(_MPI_LIB_NAME IN LISTS MPI_LIB_NAMES_WORK)
+ get_filename_component(_MPI_PLAIN_LIB_NAME "${_MPI_LIB_NAME}" NAME_WE)
+ list(APPEND MPI_PLAIN_LIB_NAMES_WORK "${_MPI_PLAIN_LIB_NAME}")
+ find_library(MPI_${_MPI_PLAIN_LIB_NAME}_LIBRARY
+ NAMES "${_MPI_LIB_NAME}" "lib${_MPI_LIB_NAME}"
+ HINTS ${MPI_LINK_DIRECTORIES_WORK}
+ DOC "Location of the ${_MPI_PLAIN_LIB_NAME} library for MPI"
+ )
+ mark_as_advanced(MPI_${_MPI_PLAIN_LIB_NAME}_LIBRARY)
+ endforeach()
+
+ # Deal with the libraries given with full path next
+ unset(MPI_DIRECT_LIB_NAMES_WORK)
+ foreach(_MPI_LIB_FULLPATH IN LISTS MPI_LIB_FULLPATHS_WORK)
+ get_filename_component(_MPI_PLAIN_LIB_NAME "${_MPI_LIB_FULLPATH}" NAME_WE)
+ get_filename_component(_MPI_LIB_NAME "${_MPI_LIB_FULLPATH}" NAME)
+ get_filename_component(_MPI_LIB_PATH "${_MPI_LIB_FULLPATH}" DIRECTORY)
+ list(APPEND MPI_DIRECT_LIB_NAMES_WORK "${_MPI_PLAIN_LIB_NAME}")
+ find_library(MPI_${_MPI_PLAIN_LIB_NAME}_LIBRARY
+ NAMES "${_MPI_LIB_NAME}"
+ HINTS ${_MPI_LIB_PATH}
+ DOC "Location of the ${_MPI_PLAIN_LIB_NAME} library for MPI"
+ )
+ mark_as_advanced(MPI_${_MPI_PLAIN_LIB_NAME}_LIBRARY)
+ endforeach()
+ if(MPI_DIRECT_LIB_NAMES_WORK)
+ set(MPI_PLAIN_LIB_NAMES_WORK "${MPI_DIRECT_LIB_NAMES_WORK};${MPI_PLAIN_LIB_NAMES_WORK}")
+ endif()
+
+ # MPI might require pthread to work. The above mechanism wouldn't detect it, but we need to
+ # link it in that case. -lpthread is covered by the normal library treatment on the other hand.
+ if("${MPI_COMPILE_CMDLINE}" MATCHES "-pthread")
+ list(APPEND MPI_COMPILE_OPTIONS_WORK "-pthread")
+ if(MPI_COMPILE_OPTIONS_WORK)
+ string(APPEND MPI_LINK_FLAGS_WORK " -pthread")
+ else()
+ set(MPI_LINK_FLAGS_WORK "-pthread")
+ endif()
+ endif()
+
+ # If we found MPI, set up all of the appropriate cache entries
+ if(NOT MPI_${LANG}_COMPILE_OPTIONS)
+ set(MPI_${LANG}_COMPILE_OPTIONS ${MPI_COMPILE_OPTIONS_WORK} CACHE STRING "MPI ${LANG} compilation options" FORCE)
+ endif()
+ if(NOT MPI_${LANG}_COMPILE_DEFINITIONS)
+ set(MPI_${LANG}_COMPILE_DEFINITIONS ${MPI_COMPILE_DEFINITIONS_WORK} CACHE STRING "MPI ${LANG} compilation definitions" FORCE)
+ endif()
+ if(NOT MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS)
+ set(MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS ${MPI_INCLUDE_DIRS_WORK} CACHE STRING "MPI ${LANG} additional include directories" FORCE)
+ endif()
+ if(NOT MPI_${LANG}_LINK_FLAGS)
+ set(MPI_${LANG}_LINK_FLAGS ${MPI_LINK_FLAGS_WORK} CACHE STRING "MPI ${LANG} linker flags" FORCE)
+ endif()
+ if(NOT MPI_${LANG}_LIB_NAMES)
+ set(MPI_${LANG}_LIB_NAMES ${MPI_PLAIN_LIB_NAMES_WORK} CACHE STRING "MPI ${LANG} libraries to link against" FORCE)
+ endif()
+ set(MPI_${LANG}_WRAPPER_FOUND TRUE PARENT_SCOPE)
+endfunction()
+
+function(_MPI_guess_settings LANG)
+ set(MPI_GUESS_FOUND FALSE)
+ # Currently only MSMPI and MPICH2 on Windows are supported, so we can skip this search if we're not targeting that.
+ if(WIN32)
+ # MSMPI
+
+ # The environment variables MSMPI_INC and MSMPILIB32/64 are the only ways of locating the MSMPI_SDK,
+ # which is installed separately from the runtime. Thus it's possible to have mpiexec but not MPI headers
+ # or import libraries and vice versa.
+ if(NOT MPI_GUESS_LIBRARY_NAME OR "${MPI_GUESS_LIBRARY_NAME}" STREQUAL "MSMPI")
+ # We first attempt to locate the msmpi.lib. Should be find it, we'll assume that the MPI present is indeed
+ # Microsoft MPI.
+ if("${CMAKE_SIZEOF_VOID_P}" EQUAL 8)
+ set(MPI_MSMPI_LIB_PATH "$ENV{MSMPI_LIB64}")
+ set(MPI_MSMPI_INC_PATH_EXTRA "$ENV{MSMPI_INC}/x64")
+ else()
+ set(MPI_MSMPI_LIB_PATH "$ENV{MSMPI_LIB32}")
+ set(MPI_MSMPI_INC_PATH_EXTRA "$ENV{MSMPI_INC}/x86")
+ endif()
+
+ find_library(MPI_msmpi_LIBRARY
+ NAMES msmpi
+ HINTS ${MPI_MSMPI_LIB_PATH}
+ DOC "Location of the msmpi library for Microsoft MPI")
+ mark_as_advanced(MPI_msmpi_LIBRARY)
+
+ if(MPI_msmpi_LIBRARY)
+ # Next, we attempt to locate the MPI header. Note that for Fortran we know that mpif.h is a way
+ # MSMPI can be used and therefore that header has to be present.
+ if(NOT MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS)
+ get_filename_component(MPI_MSMPI_INC_DIR "$ENV{MSMPI_INC}" REALPATH)
+ set(MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS "${MPI_MSMPI_INC_DIR}" CACHE STRING "MPI ${LANG} additional include directories" FORCE)
+ unset(MPI_MSMPI_INC_DIR)
+ endif()
+
+ # For MSMPI, one can compile the MPI module by building the mpi.f90 shipped with the MSMPI SDK,
+ # thus it might be present or provided by the user. Figuring out which is supported is done later on.
+ # The PGI Fortran compiler for instance ships a prebuilt set of modules in its own include folder.
+ # Should a user be employing PGI or have built its own set and provided it via cache variables, the
+ # splitting routine would have located the module files.
+
+ # For C and C++, we're done here (MSMPI does not ship the MPI-2 C++ bindings) - however, for Fortran
+ # we need some extra library to glue Fortran support together:
+ # MSMPI ships 2-4 Fortran libraries, each for different Fortran compiler behaviors. The library names
+ # ending with a c are using the cdecl calling convention, whereas those ending with an s are for Fortran
+ # implementations using stdcall. Therefore, the 64-bit MSMPI only ships those ending in 'c', whereas the 32-bit
+ # has both variants available.
+ # The second difference is the last but one letter, if it's an e(nd), the length of a string argument is
+ # passed by the Fortran compiler after all other arguments on the parameter list, if it's an m(ixed),
+ # it's passed immediately after the string address.
+
+ # To summarize:
+ # - msmpifec: CHARACTER length passed after the parameter list and using cdecl calling convention
+ # - msmpifmc: CHARACTER length passed directly after string address and using cdecl calling convention
+ # - msmpifes: CHARACTER length passed after the parameter list and using stdcall calling convention
+ # - msmpifms: CHARACTER length passed directly after string address and using stdcall calling convention
+ # 32-bit MSMPI ships all four libraries, 64-bit MSMPI ships only the first two.
+
+ # As is, Intel Fortran and PGI Fortran both use the 'ec' variant of the calling convention, whereas
+ # the old Compaq Visual Fortran compiler defaulted to the 'ms' version. It's possible to make Intel Fortran
+ # use the CVF calling convention using /iface:cvf, but we assume - and this is also assumed in FortranCInterface -
+ # this isn't the case. It's also possible to make CVF use the 'ec' variant, using /iface=(cref,nomixed_str_len_arg).
+
+ # Our strategy is now to locate all libraries, but enter msmpifec into the LIB_NAMES array.
+ # Should this not be adequate it's a straightforward way for a user to change the LIB_NAMES array and
+ # have his library found. Still, this should not be necessary outside of exceptional cases, as reasoned.
+ if ("${LANG}" STREQUAL "Fortran")
+ set(MPI_MSMPI_CALLINGCONVS c)
+ if("${CMAKE_SIZEOF_VOID_P}" EQUAL 4)
+ list(APPEND MPI_MSMPI_CALLINGCONVS s)
+ endif()
+ foreach(mpistrlenpos IN ITEMS e m)
+ foreach(mpicallingconv IN LISTS MPI_MSMPI_CALLINGCONVS)
+ find_library(MPI_msmpif${mpistrlenpos}${mpicallingconv}_LIBRARY
+ NAMES msmpif${mpistrlenpos}${mpicallingconv}
+ HINTS "${MPI_MSMPI_LIB_PATH}"
+ DOC "Location of the msmpi${mpistrlenpos}${mpicallingconv} library for Microsoft MPI")
+ mark_as_advanced(MPI_msmpif${mpistrlenpos}${mpicallingconv}_LIBRARY)
+ endforeach()
+ endforeach()
+ if(NOT MPI_${LANG}_LIB_NAMES)
+ set(MPI_${LANG}_LIB_NAMES "msmpi;msmpifec" CACHE STRING "MPI ${LANG} libraries to link against" FORCE)
+ endif()
+
+ # At this point we're *not* done. MSMPI requires an additional include file for Fortran giving the value
+ # of MPI_AINT. This file is called mpifptr.h located in the x64 and x86 subfolders, respectively.
+ find_path(MPI_mpifptr_INCLUDE_DIR
+ NAMES "mpifptr.h"
+ HINTS "${MPI_MSMPI_INC_PATH_EXTRA}"
+ DOC "Location of the mpifptr.h extra header for Microsoft MPI")
+ if(NOT MPI_${LANG}_ADDITIONAL_INCLUDE_VARS)
+ set(MPI_${LANG}_ADDITIONAL_INCLUDE_VARS "mpifptr" CACHE STRING "MPI ${LANG} additional include directory variables, given in the form MPI_<name>_INCLUDE_DIR." FORCE)
+ endif()
+ mark_as_advanced(MPI_${LANG}_ADDITIONAL_INCLUDE_VARS MPI_mpifptr_INCLUDE_DIR)
+ else()
+ if(NOT MPI_${LANG}_LIB_NAMES)
+ set(MPI_${LANG}_LIB_NAMES "msmpi" CACHE STRING "MPI ${LANG} libraries to link against" FORCE)
+ endif()
+ endif()
+ mark_as_advanced(MPI_${LANG}_LIB_NAMES)
+ set(MPI_GUESS_FOUND TRUE)
+ endif()
+ endif()
+
+ # At this point there's not many MPIs that we could still consider.
+ # OpenMPI 1.6.x and below supported Windows, but these ship compiler wrappers that still work.
+ # The only other relevant MPI implementation without a wrapper is MPICH2, which had Windows support in 1.4.1p1 and older.
+ if(NOT MPI_GUESS_LIBRARY_NAME OR "${MPI_GUESS_LIBRARY_NAME}" STREQUAL "MPICH2")
+ set(MPI_MPICH_PREFIX_PATHS
+ "$ENV{ProgramW6432}/MPICH2/lib"
+ "[HKEY_LOCAL_MACHINE\\SOFTWARE\\MPICH\\SMPD;binary]/../lib"
+ "[HKEY_LOCAL_MACHINE\\SOFTWARE\\MPICH2;Path]/lib"
+ )
+
+ # All of C, C++ and Fortran will need mpi.lib, so we'll look for this first
+ find_library(MPI_mpi_LIBRARY
+ NAMES mpi
+ HINTS ${MPI_MPICH_PREFIX_PATHS})
+ mark_as_advanced(MPI_mpi_LIBRARY)
+ # If we found mpi.lib, we detect the rest of MPICH2
+ if(MPI_mpi_LIBRARY)
+ set(MPI_MPICH_LIB_NAMES "mpi")
+ # If MPI-2 C++ bindings are requested, we need to locate cxx.lib as well.
+ # Otherwise, MPICH_SKIP_MPICXX will be defined and these bindings aren't needed.
+ if("${LANG}" STREQUAL "CXX" AND NOT MPI_CXX_SKIP_MPICXX)
+ find_library(MPI_cxx_LIBRARY
+ NAMES cxx
+ HINTS ${MPI_MPICH_PREFIX_PATHS})
+ mark_as_advanced(MPI_cxx_LIBRARY)
+ list(APPEND MPI_MPICH_LIB_NAMES "cxx")
+ # For Fortran, MPICH2 provides three different libraries:
+ # fmpich2.lib which uses uppercase symbols and cdecl,
+ # fmpich2s.lib which uses uppercase symbols and stdcall (32-bit only),
+ # fmpich2g.lib which uses lowercase symbols with double underscores and cdecl.
+ # fmpich2s.lib would be useful for Compaq Visual Fortran, fmpich2g.lib has to be used with GNU g77 and is also
+ # provided in the form of an .a archive for MinGW and Cygwin. From our perspective, fmpich2.lib is the only one
+ # we need to try, and if it doesn't work with the given Fortran compiler we'd find out later on during validation
+ elseif("${LANG}" STREQUAL "Fortran")
+ find_library(MPI_fmpich2_LIBRARY
+ NAMES fmpich2
+ HINTS ${MPI_MPICH_PREFIX_PATHS})
+ find_library(MPI_fmpich2s_LIBRARY
+ NAMES fmpich2s
+ HINTS ${MPI_MPICH_PREFIX_PATHS})
+ find_library(MPI_fmpich2g_LIBRARY
+ NAMES fmpich2g
+ HINTS ${MPI_MPICH_PREFIX_PATHS})
+ mark_as_advanced(MPI_fmpich2_LIBRARY MPI_fmpich2s_LIBRARY MPI_fmpich2g_LIBRARY)
+ list(APPEND MPI_MPICH_LIB_NAMES "fmpich2")
+ endif()
+
+ if(NOT MPI_${LANG}_LIB_NAMES)
+ set(MPI_${LANG}_LIB_NAMES "${MPI_MPICH_LIB_NAMES}" CACHE STRING "MPI ${LANG} libraries to link against" FORCE)
+ endif()
+ unset(MPI_MPICH_LIB_NAMES)
+
+ if(NOT MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS)
+ # For MPICH2, the include folder would be in ../include relative to the library folder.
+ get_filename_component(MPI_MPICH_ROOT_DIR "${MPI_mpi_LIBRARY}" DIRECTORY)
+ get_filename_component(MPI_MPICH_ROOT_DIR "${MPI_MPICH_ROOT_DIR}" DIRECTORY)
+ if(IS_DIRECTORY "${MPI_MPICH_ROOT_DIR}/include")
+ set(MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS "${MPI_MPICH_ROOT_DIR}/include" CACHE STRING "MPI ${LANG} additional include directory variables, given in the form MPI_<name>_INCLUDE_DIR." FORCE)
+ endif()
+ unset(MPI_MPICH_ROOT_DIR)
+ endif()
+ set(MPI_GUESS_FOUND TRUE)
+ endif()
+ unset(MPI_MPICH_PREFIX_PATHS)
+ endif()
+ endif()
+ set(MPI_${LANG}_GUESS_FOUND "${MPI_GUESS_FOUND}" PARENT_SCOPE)
+endfunction()
+
+function(_MPI_adjust_compile_definitions LANG)
+ if("${LANG}" STREQUAL "CXX")
+ # To disable the C++ bindings, we need to pass some definitions since the mpi.h header has to deal with both C and C++
+ # bindings in MPI-2.
+ if(MPI_CXX_SKIP_MPICXX AND NOT MPI_${LANG}_COMPILE_DEFINITIONS MATCHES "SKIP_MPICXX")
+ # MPICH_SKIP_MPICXX is being used in MPICH and derivatives like MVAPICH or Intel MPI
+ # OMPI_SKIP_MPICXX is being used in Open MPI
+ # _MPICC_H is being used for IBM Platform MPI
+ list(APPEND MPI_${LANG}_COMPILE_DEFINITIONS "MPICH_SKIP_MPICXX" "OMPI_SKIP_MPICXX" "_MPICC_H")
+ set(MPI_${LANG}_COMPILE_DEFINITIONS "${MPI_${LANG}_COMPILE_DEFINITIONS}" CACHE STRING "MPI ${LANG} compilation definitions" FORCE)
+ endif()
+ endif()
+endfunction()
+
+macro(_MPI_assemble_libraries LANG)
+ set(MPI_${LANG}_LIBRARIES "")
+ foreach(mpilib IN LISTS MPI_${LANG}_LIB_NAMES)
+ list(APPEND MPI_${LANG}_LIBRARIES ${MPI_${mpilib}_LIBRARY})
+ endforeach()
+endmacro()
+
+macro(_MPI_assemble_include_dirs LANG)
+ set(MPI_${LANG}_INCLUDE_DIRS "${MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS}")
+ if("${LANG}" MATCHES "(C|CXX)")
+ if(MPI_${LANG}_HEADER_DIR)
+ list(APPEND MPI_${LANG}_INCLUDE_DIRS "${MPI_${LANG}_HEADER_DIR}")
+ endif()
+ else() # Fortran
+ if(MPI_${LANG}_F77_HEADER_DIR)
+ list(APPEND MPI_${LANG}_INCLUDE_DIRS "${MPI_${LANG}_F77_HEADER_DIR}")
+ endif()
+ if(MPI_${LANG}_MODULE_DIR AND NOT "${MPI_${LANG}_MODULE_DIR}" IN_LIST MPI_${LANG}_INCLUDE_DIRS)
+ list(APPEND MPI_${LANG}_INCLUDE_DIRS "${MPI_${LANG}_MODULE_DIR}")
+ endif()
+ endif()
+ if(MPI_${LANG}_ADDITIONAL_INCLUDE_VARS)
+ foreach(mpiadditionalinclude IN LISTS MPI_${LANG}_ADDITIONAL_INCLUDE_VARS)
+ list(APPEND MPI_${LANG}_INCLUDE_DIRS "${MPI_${mpiadditionalinclude}_INCLUDE_DIR}")
+ endforeach()
+ endif()
+endmacro()
+
+function(_MPI_split_include_dirs LANG)
+ # Backwards compatibility: Search INCLUDE_PATH if given.
+ if(MPI_${LANG}_INCLUDE_PATH)
+ list(APPEND MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS "${MPI_${LANG}_INCLUDE_PATH}")
+ endif()
+
+ # We try to find the headers/modules among those paths (and system paths)
+ # For C/C++, we just need to have a look for mpi.h.
+ if("${LANG}" MATCHES "(C|CXX)")
+ find_path(MPI_${LANG}_HEADER_DIR "mpi.h"
+ HINTS ${MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS}
+ )
+ mark_as_advanced(MPI_${LANG}_HEADER_DIR)
+ if(MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS)
+ list(REMOVE_ITEM MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS "${MPI_${LANG}_HEADER_DIR}")
+ endif()
+ # Fortran is more complicated here: An implementation could provide
+ # any of the Fortran 77/90/2008 APIs for MPI. For example, MSMPI
+ # only provides Fortran 77 and - if mpi.f90 is built - potentially
+ # a Fortran 90 module.
+ elseif("${LANG}" STREQUAL "Fortran")
+ find_path(MPI_${LANG}_F77_HEADER_DIR "mpif.h"
+ HINTS ${MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS}
+ )
+ find_path(MPI_${LANG}_MODULE_DIR
+ NAMES "mpi.mod" "mpi_f08.mod"
+ HINTS ${MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS}
+ )
+ if(MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS)
+ list(REMOVE_ITEM MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS
+ "${MPI_${LANG}_F77_HEADER_DIR}"
+ "${MPI_${LANG}_MODULE_DIR}"
+ )
+ endif()
+ mark_as_advanced(MPI_${LANG}_F77_HEADER_DIR MPI_${LANG}_MODULE_DIR)
+ endif()
+ set(MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS ${MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS} CACHE STRING "MPI ${LANG} additional include directories" FORCE)
+endfunction()
+
+macro(_MPI_create_imported_target LANG)
+ if(NOT TARGET MPI::MPI_${LANG})
+ add_library(MPI::MPI_${LANG} INTERFACE IMPORTED)
+ endif()
+
+ set_property(TARGET MPI::MPI_${LANG} PROPERTY INTERFACE_COMPILE_OPTIONS "${MPI_${LANG}_COMPILE_OPTIONS}")
+ set_property(TARGET MPI::MPI_${LANG} PROPERTY INTERFACE_COMPILE_DEFINITIONS "${MPI_${LANG}_COMPILE_DEFINITIONS}")
+
+ set_property(TARGET MPI::MPI_${LANG} PROPERTY INTERFACE_LINK_LIBRARIES "")
+ if(MPI_${LANG}_LINK_FLAGS)
+ set_property(TARGET MPI::MPI_${LANG} APPEND PROPERTY INTERFACE_LINK_LIBRARIES "${MPI_${LANG}_LINK_FLAGS}")
+ endif()
+ # If the compiler links MPI implicitly, no libraries will be found as they're contained within
+ # CMAKE_<LANG>_IMPLICIT_LINK_LIBRARIES already.
+ if(MPI_${LANG}_LIBRARIES)
+ set_property(TARGET MPI::MPI_${LANG} APPEND PROPERTY INTERFACE_LINK_LIBRARIES "${MPI_${LANG}_LIBRARIES}")
+ endif()
+ # Given the new design of FindMPI, INCLUDE_DIRS will always be located, even under implicit linking.
+ set_property(TARGET MPI::MPI_${LANG} PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${MPI_${LANG}_INCLUDE_DIRS}")
+endmacro()
+
+function(_MPI_try_staged_settings LANG MPI_TEST_FILE_NAME MODE RUN_BINARY)
+ set(WORK_DIR "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/FindMPI")
+ set(SRC_DIR "${CMAKE_CURRENT_LIST_DIR}/FindMPI")
+ set(BIN_FILE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/FindMPI/${MPI_TEST_FILE_NAME}_${LANG}.bin")
+ unset(MPI_TEST_COMPILE_DEFINITIONS)
+ if("${LANG}" STREQUAL "Fortran")
+ if("${MODE}" STREQUAL "F90_MODULE")
+ set(MPI_Fortran_INCLUDE_LINE "use mpi\n implicit none")
+ elseif("${MODE}" STREQUAL "F08_MODULE")
+ set(MPI_Fortran_INCLUDE_LINE "use mpi_f08\n implicit none")
+ else() # F77 header
+ set(MPI_Fortran_INCLUDE_LINE "implicit none\n include 'mpif.h'")
+ endif()
+ configure_file("${SRC_DIR}/${MPI_TEST_FILE_NAME}.f90.in" "${WORK_DIR}/${MPI_TEST_FILE_NAME}.f90" @ONLY)
+ set(MPI_TEST_SOURCE_FILE "${WORK_DIR}/${MPI_TEST_FILE_NAME}.f90")
+ elseif("${LANG}" STREQUAL "CXX")
+ configure_file("${SRC_DIR}/${MPI_TEST_FILE_NAME}.c" "${WORK_DIR}/${MPI_TEST_FILE_NAME}.cpp" COPYONLY)
+ set(MPI_TEST_SOURCE_FILE "${WORK_DIR}/${MPI_TEST_FILE_NAME}.cpp")
+ if("${MODE}" STREQUAL "TEST_MPICXX")
+ set(MPI_TEST_COMPILE_DEFINITIONS TEST_MPI_MPICXX)
+ endif()
+ else() # C
+ set(MPI_TEST_SOURCE_FILE "${SRC_DIR}/${MPI_TEST_FILE_NAME}.c")
+ endif()
+ if(RUN_BINARY)
+ try_run(MPI_RUN_RESULT_${LANG}_${MPI_TEST_FILE_NAME}_${MODE} MPI_RESULT_${LANG}_${MPI_TEST_FILE_NAME}_${MODE}
+ "${CMAKE_BINARY_DIR}" SOURCES "${MPI_TEST_SOURCE_FILE}"
+ COMPILE_DEFINITIONS ${MPI_TEST_COMPILE_DEFINITIONS}
+ LINK_LIBRARIES MPI::MPI_${LANG}
+ RUN_OUTPUT_VARIABLE MPI_RUN_OUTPUT_${LANG}_${MPI_TEST_FILE_NAME}_${MODE})
+ set(MPI_RUN_OUTPUT_${LANG}_${MPI_TEST_FILE_NAME}_${MODE} "${MPI_RUN_OUTPUT_${LANG}_${MPI_TEST_FILE_NAME}_${MODE}}" PARENT_SCOPE)
+ else()
+ try_compile(MPI_RESULT_${LANG}_${MPI_TEST_FILE_NAME}_${MODE}
+ "${CMAKE_BINARY_DIR}" SOURCES "${MPI_TEST_SOURCE_FILE}"
+ COMPILE_DEFINITIONS ${MPI_TEST_COMPILE_DEFINITIONS}
+ LINK_LIBRARIES MPI::MPI_${LANG}
+ COPY_FILE "${BIN_FILE}")
+ endif()
+endfunction()
+
+macro(_MPI_check_lang_works LANG)
+ # For Fortran we may have by the MPI-3 standard an implementation that provides:
+ # - the mpi_f08 module
+ # - *both*, the mpi module and 'mpif.h'
+ # Since older MPI standards (MPI-1) did not define anything but 'mpif.h', we need to check all three individually.
+ if( NOT MPI_${LANG}_WORKS )
+ if("${LANG}" STREQUAL "Fortran")
+ set(MPI_Fortran_INTEGER_LINE "(kind=MPI_INTEGER_KIND)")
+ _MPI_try_staged_settings(${LANG} test_mpi F77_HEADER FALSE)
+ _MPI_try_staged_settings(${LANG} test_mpi F90_MODULE FALSE)
+ _MPI_try_staged_settings(${LANG} test_mpi F08_MODULE FALSE)
+
+ set(MPI_${LANG}_WORKS FALSE)
+
+ foreach(mpimethod IN ITEMS F77_HEADER F08_MODULE F90_MODULE)
+ if(MPI_RESULT_${LANG}_test_mpi_${mpimethod})
+ set(MPI_${LANG}_WORKS TRUE)
+ set(MPI_${LANG}_HAVE_${mpimethod} TRUE)
+ else()
+ set(MPI_${LANG}_HAVE_${mpimethod} FALSE)
+ endif()
+ endforeach()
+ # MPI-1 versions had no MPI_INTGER_KIND defined, so we need to try without it.
+ # However, MPI-1 also did not define the Fortran 90 and 08 modules, so we only try the F77 header.
+ unset(MPI_Fortran_INTEGER_LINE)
+ if(NOT MPI_${LANG}_WORKS)
+ _MPI_try_staged_settings(${LANG} test_mpi F77_HEADER_NOKIND FALSE)
+ if(MPI_RESULT_${LANG}_test_mpi_F77_HEADER_NOKIND)
+ set(MPI_${LANG}_WORKS TRUE)
+ set(MPI_${LANG}_HAVE_F77_HEADER TRUE)
+ endif()
+ endif()
+ else()
+ _MPI_try_staged_settings(${LANG} test_mpi normal FALSE)
+ # If 'test_mpi' built correctly, we've found valid MPI settings. There might not be MPI-2 C++ support, but there can't
+ # be MPI-2 C++ support without the C bindings being present, so checking for them is sufficient.
+ set(MPI_${LANG}_WORKS "${MPI_RESULT_${LANG}_test_mpi_normal}")
+ endif()
+ endif()
+endmacro()
+
+# Some systems install various MPI implementations in separate folders in some MPI prefix
+# This macro enumerates all such subfolders and adds them to the list of hints that will be searched.
+macro(MPI_search_mpi_prefix_folder PREFIX_FOLDER)
+ if(EXISTS "${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}
+ PATH_SUFFIXES bin sbin
+ HINTS ${MPI_HINT_DIRS}
+ DOC "Executable for running MPI programs.")
+
+# call get_filename_component twice to remove mpiexec and the directory it exists in (typically bin).
+# This gives us a fairly reliable base directory to search for /bin /lib and /include from.
+get_filename_component(_MPI_BASE_DIR "${MPIEXEC_EXECUTABLE}" PATH)
+get_filename_component(_MPI_BASE_DIR "${_MPI_BASE_DIR}" PATH)
+
+# According to the MPI standard, section 8.8 -n is a guaranteed, and the only guaranteed way to
+# launch an MPI process using mpiexec if such a program exists.
+set(MPIEXEC_NUMPROC_FLAG "-n" CACHE STRING "Flag used by MPI to specify the number of processes for mpiexec; the next option will be the number of processes.")
+set(MPIEXEC_PREFLAGS "" CACHE STRING "These flags will be directly before the executable that is being run by mpiexec.")
+set(MPIEXEC_POSTFLAGS "" CACHE STRING "These flags will be placed after all flags passed to mpiexec.")
+
+# Set the number of processes to the processor count and the previous default
+# of 2 if that couldn't be determined.
+include(ProcessorCount)
+ProcessorCount(_MPIEXEC_NUMPROCS)
+if("${_MPIEXEC_NUMPROCS}" EQUAL "0")
+ set(_MPIEXEC_NUMPROCS 2)
+endif()
+set(MPIEXEC_MAX_NUMPROCS "${_MPIEXEC_NUMPROCS}" CACHE STRING "Maximum number of processors available to run MPI applications.")
+unset(_MPIEXEC_NUMPROCS)
+mark_as_advanced(MPIEXEC_EXECUTABLE MPIEXEC_NUMPROC_FLAG MPIEXEC_PREFLAGS MPIEXEC_POSTFLAGS MPIEXEC_MAX_NUMPROCS)
+
+#=============================================================================
+# Backward compatibility input hacks. Propagate the FindMPI hints to C and
+# CXX if the respective new versions are not defined. Translate the old
+# MPI_LIBRARY and MPI_EXTRA_LIBRARY to respective MPI_${LANG}_LIBRARIES.
+#
+# Once we find the new variables, we translate them back into their old
+# equivalents below.
+foreach (LANG IN ITEMS C CXX)
+ # Old input variables.
+ set(_MPI_OLD_INPUT_VARS COMPILER COMPILE_FLAGS INCLUDE_PATH LINK_FLAGS)
+
+ # Set new vars based on their old equivalents, if the new versions are not already set.
+ foreach (var ${_MPI_OLD_INPUT_VARS})
+ if (NOT MPI_${LANG}_${var} AND MPI_${var})
+ set(MPI_${LANG}_${var} "${MPI_${var}}")
+ endif()
+ endforeach()
+
+ # Chop the old compile flags into options and definitions
+ if(MPI_${LANG}_COMPILE_FLAGS)
+ unset(MPI_${LANG}_COMPILE_OPTIONS)
+ unset(MPI_${LANG}_COMPILE_DEFINITIONS)
+ separate_arguments(MPI_SEPARATE_FLAGS ${_MPI_COMMAND_TYPE} "${MPI_${LANG}_COMPILE_FLAGS}")
+ foreach(_MPI_FLAG IN LISTS MPI_SEPARATE_FLAGS)
+ if("${_MPI_FLAG}" MATCHES "^ *[-/D]([^ ]+)")
+ list(APPEND MPI_${LANG}_COMPILE_DEFINITIONS "${CMAKE_MATCH_1}")
+ else()
+ list(APPEND MPI_${LANG}_COMPILE_FLAGS "${_MPI_FLAG}")
+ endif()
+ endforeach()
+ unset(MPI_SEPARATE_FLAGS)
+ endif()
+
+ # If a list of libraries was given, we'll split it into new-style cache variables
+ if(NOT MPI_${LANG}_LIB_NAMES)
+ foreach(_MPI_LIB IN LISTS MPI_${LANG}_LIBRARIES MPI_LIBRARY MPI_EXTRA_LIBRARY)
+ get_filename_component(_MPI_PLAIN_LIB_NAME "${_MPI_LIB}" NAME_WE)
+ get_filename_component(_MPI_LIB_NAME "${_MPI_LIB}" NAME)
+ get_filename_component(_MPI_LIB_DIR "${_MPI_LIB}" DIRECTORY)
+ list(APPEND MPI_PLAIN_LIB_NAMES_WORK "${_MPI_PLAIN_LIB_NAME}")
+ find_library(MPI_${_MPI_PLAIN_LIB_NAME}_LIBRARY
+ NAMES "${_MPI_LIB_NAME}" "lib${_MPI_LIB_NAME}"
+ HINTS ${_MPI_LIB_DIR} $ENV{MPI_LIB}
+ DOC "Location of the ${_MPI_PLAIN_LIB_NAME} library for MPI"
+ )
+ mark_as_advanced(MPI_${_MPI_PLAIN_LIB_NAME}_LIBRARY)
+ endforeach()
+ endif()
+endforeach()
+#=============================================================================
+
+unset(MPI_VERSION)
+unset(MPI_VERSION_MAJOR)
+unset(MPI_VERSION_MINOR)
+
+unset(_MPI_MIN_VERSION)
+
+# This loop finds the compilers and sends them off for interrogation.
+foreach(LANG IN ITEMS C CXX Fortran)
+ if(CMAKE_${LANG}_COMPILER_LOADED)
+ if(NOT MPI_FIND_COMPONENTS)
+ set(_MPI_FIND_${LANG} TRUE)
+ elseif( ${LANG} IN_LIST MPI_FIND_COMPONENTS)
+ set(_MPI_FIND_${LANG} TRUE)
+ elseif( ${LANG} STREQUAL CXX AND NOT MPI_CXX_SKIP_MPICXX AND MPICXX IN_LIST MPI_FIND_COMPONENTS )
+ set(_MPI_FIND_${LANG} TRUE)
+ else()
+ set(_MPI_FIND_${LANG} FALSE)
+ endif()
+ else()
+ set(_MPI_FIND_${LANG} FALSE)
+ endif()
+ if(_MPI_FIND_${LANG})
+ if( ${LANG} STREQUAL CXX AND NOT MPICXX IN_LIST MPI_FIND_COMPONENTS )
+ set(MPI_CXX_SKIP_MPICXX FALSE CACHE BOOL "If true, the MPI-2 C++ bindings are disabled using definitions.")
+ mark_as_advanced(MPI_CXX_SKIP_MPICXX)
+ endif()
+ if(NOT (MPI_${LANG}_LIB_NAMES AND (MPI_${LANG}_INCLUDE_PATH OR MPI_${LANG}_INCLUDE_DIRS OR MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS)))
+ if(NOT MPI_${LANG}_COMPILER AND NOT MPI_ASSUME_NO_BUILTIN_MPI)
+ # Should the imported targets be empty, we effectively try whether the compiler supports MPI on its own, which is the case on e.g.
+ # Cray PrgEnv.
+ _MPI_create_imported_target(${LANG})
+ _MPI_check_lang_works(${LANG})
+
+ # If the compiler can build MPI code on its own, it functions as an MPI compiler and we'll set the variable to point to it.
+ if(MPI_${LANG}_WORKS)
+ set(MPI_${LANG}_COMPILER "${CMAKE_${LANG}_COMPILER}" CACHE FILEPATH "MPI compiler for ${LANG}" FORCE)
+ endif()
+ endif()
+
+ # If the user specified a library name we assume they prefer that library over a wrapper. If not, they can disable skipping manually.
+ if(NOT DEFINED MPI_SKIP_COMPILER_WRAPPER AND MPI_GUESS_LIBRARY_NAME)
+ set(MPI_SKIP_COMPILER_WRAPPER TRUE)
+ endif()
+ if(NOT MPI_SKIP_COMPILER_WRAPPER)
+ if(MPI_${LANG}_COMPILER)
+ # If the user supplies a compiler *name* instead of an absolute path, assume that we need to find THAT compiler.
+ if (NOT IS_ABSOLUTE "${MPI_${LANG}_COMPILER}")
+ # Get rid of our default list of names and just search for the name the user wants.
+ set(_MPI_${LANG}_COMPILER_NAMES "${MPI_${LANG}_COMPILER}")
+ unset(MPI_${LANG}_COMPILER CACHE)
+ endif()
+ # If the user specifies a compiler, we don't want to try to search libraries either.
+ set(MPI_PINNED_COMPILER TRUE)
+ else()
+ set(MPI_PINNED_COMPILER FALSE)
+ endif()
+
+ # If we have an MPI base directory, we'll try all compiler names in that one first.
+ # This should prevent mixing different MPI environments
+ if(_MPI_BASE_DIR)
+ find_program(MPI_${LANG}_COMPILER
+ NAMES ${_MPI_${LANG}_COMPILER_NAMES}
+ PATH_SUFFIXES bin sbin
+ HINTS ${_MPI_BASE_DIR}
+ NO_DEFAULT_PATH
+ DOC "MPI compiler for ${LANG}"
+ )
+ endif()
+
+ # If the base directory did not help (for example because the mpiexec isn't in the same directory as the compilers),
+ # we shall try searching in the default paths.
+ find_program(MPI_${LANG}_COMPILER
+ NAMES ${_MPI_${LANG}_COMPILER_NAMES}
+ PATH_SUFFIXES bin sbin
+ DOC "MPI compiler for ${LANG}"
+ )
+
+ if(MPI_${LANG}_COMPILER STREQUAL CMAKE_${LANG}_COMPILER)
+ set(MPI_SKIP_GUESSING TRUE)
+ elseif(MPI_${LANG}_COMPILER)
+ _MPI_interrogate_compiler(${LANG})
+ else()
+ set(MPI_${LANG}_WRAPPER_FOUND FALSE)
+ endif()
+ else()
+ set(MPI_${LANG}_WRAPPER_FOUND FALSE)
+ set(MPI_PINNED_COMPILER FALSE)
+ endif()
+
+ if(NOT MPI_${LANG}_WRAPPER_FOUND AND NOT MPI_PINNED_COMPILER)
+ # For C++, we may use the settings for C. Should a given compiler wrapper for C++ not exist, but one for C does, we copy over the
+ # settings for C. An MPI distribution that is in this situation would be IBM Platform MPI.
+ if("${LANG}" STREQUAL "CXX" AND MPI_C_WRAPPER_FOUND)
+ set(MPI_${LANG}_COMPILE_OPTIONS ${MPI_C_COMPILE_OPTIONS} CACHE STRING "MPI ${LANG} compilation options" )
+ set(MPI_${LANG}_COMPILE_DEFINITIONS ${MPI_C_COMPILE_DEFINITIONS} CACHE STRING "MPI ${LANG} compilation definitions" )
+ set(MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS ${MPI_C_INCLUDE_DIRS} CACHE STRING "MPI ${LANG} additional include directories")
+ set(MPI_${LANG}_LINK_FLAGS ${MPI_C_LINK_FLAGS} CACHE STRING "MPI ${LANG} linker flags" )
+ set(MPI_${LANG}_LIB_NAMES ${MPI_C_LIB_NAMES} CACHE STRING "MPI ${LANG} libraries to link against" )
+ set(MPI_${LANG}_WRAPPER_FOUND TRUE)
+ elseif(NOT MPI_SKIP_GUESSING)
+ _MPI_guess_settings(${LANG})
+ endif()
+ endif()
+ endif()
+
+ _MPI_split_include_dirs(${LANG})
+ if(NOT MPI_${LANG}_COMPILER STREQUAL CMAKE_${LANG}_COMPILER)
+ _MPI_assemble_include_dirs(${LANG})
+ _MPI_assemble_libraries(${LANG})
+ endif()
+ _MPI_adjust_compile_definitions(${LANG})
+ # We always create imported targets even if they're empty
+ _MPI_create_imported_target(${LANG})
+
+ if(NOT MPI_${LANG}_WORKS)
+ _MPI_check_lang_works(${LANG})
+ endif()
+
+ # Next, we'll initialize the MPI variables that have not been previously set.
+ set(MPI_${LANG}_COMPILE_OPTIONS "" CACHE STRING "MPI ${LANG} compilation flags" )
+ set(MPI_${LANG}_COMPILE_DEFINITIONS "" CACHE STRING "MPI ${LANG} compilation definitions" )
+ set(MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS "" CACHE STRING "MPI ${LANG} additional include directories")
+ set(MPI_${LANG}_LINK_FLAGS "" CACHE STRING "MPI ${LANG} linker flags" )
+ set(MPI_${LANG}_LIB_NAMES "" CACHE STRING "MPI ${LANG} libraries to link against" )
+ mark_as_advanced(MPI_${LANG}_COMPILE_OPTIONS MPI_${LANG}_COMPILE_DEFINITIONS MPI_${LANG}_LINK_FLAGS
+ MPI_${LANG}_LIB_NAMES MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS MPI_${LANG}_COMPILER)
+
+ # If we've found MPI, then we'll perform additional analysis: Determine the MPI version, MPI library version, supported
+ # MPI APIs (i.e. MPI-2 C++ bindings). For Fortran we also need to find specific parameters if we're under MPI-3.
+ if(MPI_${LANG}_WORKS)
+ if("${LANG}" STREQUAL "CXX" AND NOT DEFINED MPI_MPICXX_FOUND)
+ if(NOT MPI_CXX_SKIP_MPICXX AND NOT MPI_CXX_VALIDATE_SKIP_MPICXX)
+ _MPI_try_staged_settings(${LANG} test_mpi MPICXX FALSE)
+ if(MPI_RESULT_${LANG}_test_mpi_MPICXX)
+ set(MPI_MPICXX_FOUND TRUE)
+ else()
+ set(MPI_MPICXX_FOUND FALSE)
+ endif()
+ else()
+ set(MPI_MPICXX_FOUND FALSE)
+ endif()
+ endif()
+
+ # At this point, we know the bindings present but not the MPI version or anything else.
+ if(NOT DEFINED MPI_${LANG}_VERSION)
+ unset(MPI_${LANG}_VERSION_MAJOR)
+ unset(MPI_${LANG}_VERSION_MINOR)
+ endif()
+ set(MPI_BIN_FOLDER ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/FindMPI)
+
+ # For Fortran, we'll want to use the most modern MPI binding to test capabilities other than the
+ # Fortran parameters, since those depend on the method of consumption.
+ # For C++, we can always use the C bindings, and should do so, since the C++ bindings do not exist in MPI-3
+ # whereas the C bindings do, and the C++ bindings never offered any feature advantage over their C counterparts.
+ if("${LANG}" STREQUAL "Fortran")
+ if(MPI_${LANG}_HAVE_F08_MODULE)
+ set(MPI_${LANG}_HIGHEST_METHOD F08_MODULE)
+ elseif(MPI_${LANG}_HAVE_F90_MODULE)
+ set(MPI_${LANG}_HIGHEST_METHOD F90_MODULE)
+ else()
+ set(MPI_${LANG}_HIGHEST_METHOD F77_HEADER)
+ endif()
+
+ # Another difference between C and Fortran is that we can't use the preprocessor to determine whether MPI_VERSION
+ # and MPI_SUBVERSION are provided. These defines did not exist in MPI 1.0 and 1.1 and therefore might not
+ # exist. For C/C++, test_mpi.c will handle the MPI_VERSION extraction, but for Fortran, we need mpiver.f90.
+ if(NOT DEFINED MPI_${LANG}_VERSION)
+ _MPI_try_staged_settings(${LANG} mpiver ${MPI_${LANG}_HIGHEST_METHOD} FALSE)
+ if(MPI_RESULT_${LANG}_mpiver_${MPI_${LANG}_HIGHEST_METHOD})
+ file(STRINGS ${MPI_BIN_FOLDER}/mpiver_${LANG}.bin _MPI_VERSION_STRING LIMIT_COUNT 1 REGEX "INFO:MPI-VER")
+ if("${_MPI_VERSION_STRING}" MATCHES ".*INFO:MPI-VER\\[([0-9]+)\\.([0-9]+)\\].*")
+ set(MPI_${LANG}_VERSION_MAJOR "${CMAKE_MATCH_1}")
+ set(MPI_${LANG}_VERSION_MINOR "${CMAKE_MATCH_2}")
+ set(MPI_${LANG}_VERSION "${MPI_${LANG}_VERSION_MAJOR}.${MPI_${LANG}_VERSION_MINOR}")
+ endif()
+ endif()
+ endif()
+
+ # Finally, we want to find out which capabilities a given interface supports, compare the MPI-3 standard.
+ # This is determined by interface specific parameters MPI_SUBARRAYS_SUPPORTED and MPI_ASYNC_PROTECTS_NONBLOCKING
+ # and might vary between the different methods of consumption.
+ if(MPI_DETERMINE_Fortran_CAPABILITIES AND NOT MPI_Fortran_CAPABILITIES_DETERMINED)
+ foreach(mpimethod IN ITEMS F08_MODULE F90_MODULE F77_HEADER)
+ if(MPI_${LANG}_HAVE_${mpimethod})
+ set(MPI_${LANG}_${mpimethod}_SUBARRAYS FALSE)
+ set(MPI_${LANG}_${mpimethod}_ASYNCPROT FALSE)
+ _MPI_try_staged_settings(${LANG} fortranparam_mpi ${mpimethod} TRUE)
+ if(MPI_RESULT_${LANG}_fortranparam_mpi_${mpimethod} AND
+ NOT "${MPI_RUN_RESULT_${LANG}_fortranparam_mpi_${mpimethod}}" STREQUAL "FAILED_TO_RUN")
+ if("${MPI_RUN_OUTPUT_${LANG}_fortranparam_mpi_${mpimethod}}" MATCHES
+ ".*INFO:SUBARRAYS\\[ *([TF]) *\\]-ASYNCPROT\\[ *([TF]) *\\].*")
+ if("${CMAKE_MATCH_1}" STREQUAL "T")
+ set(MPI_${LANG}_${mpimethod}_SUBARRAYS TRUE)
+ endif()
+ if("${CMAKE_MATCH_2}" STREQUAL "T")
+ set(MPI_${LANG}_${mpimethod}_ASYNCPROT TRUE)
+ endif()
+ endif()
+ endif()
+ endif()
+ endforeach()
+ set(MPI_Fortran_CAPABILITIES_DETERMINED TRUE)
+ endif()
+ else()
+ set(MPI_${LANG}_HIGHEST_METHOD normal)
+
+ # By the MPI-2 standard, MPI_VERSION and MPI_SUBVERSION are valid for both C and C++ bindings.
+ if(NOT DEFINED MPI_${LANG}_VERSION)
+ file(STRINGS ${MPI_BIN_FOLDER}/test_mpi_${LANG}.bin _MPI_VERSION_STRING LIMIT_COUNT 1 REGEX "INFO:MPI-VER")
+ if("${_MPI_VERSION_STRING}" MATCHES ".*INFO:MPI-VER\\[([0-9]+)\\.([0-9]+)\\].*")
+ set(MPI_${LANG}_VERSION_MAJOR "${CMAKE_MATCH_1}")
+ set(MPI_${LANG}_VERSION_MINOR "${CMAKE_MATCH_2}")
+ set(MPI_${LANG}_VERSION "${MPI_${LANG}_VERSION_MAJOR}.${MPI_${LANG}_VERSION_MINOR}")
+ endif()
+ endif()
+ endif()
+
+ unset(MPI_BIN_FOLDER)
+
+ # At this point, we have dealt with determining the MPI version and parameters for each Fortran method available.
+ # The one remaining issue is to determine which MPI library is installed.
+ # Determining the version and vendor of the MPI library is only possible via MPI_Get_library_version() at runtime,
+ # and therefore we cannot do this while cross-compiling (a user may still define MPI_<lang>_LIBRARY_VERSION_STRING
+ # themselves and we'll attempt splitting it, which is equivalent to provide the try_run output).
+ # It's also worth noting that the installed version string can depend on the language, or on the system the binary
+ # runs on if MPI is not statically linked.
+ if(MPI_DETERMINE_LIBRARY_VERSION AND NOT MPI_${LANG}_LIBRARY_VERSION_STRING)
+ _MPI_try_staged_settings(${LANG} libver_mpi ${MPI_${LANG}_HIGHEST_METHOD} TRUE)
+ if(MPI_RESULT_${LANG}_libver_mpi_${MPI_${LANG}_HIGHEST_METHOD} AND
+ "${MPI_RUN_RESULT_${LANG}_libver_mpi_${MPI_${LANG}_HIGHEST_METHOD}}" EQUAL "0")
+ string(STRIP "${MPI_RUN_OUTPUT_${LANG}_libver_mpi_${MPI_${LANG}_HIGHEST_METHOD}}"
+ MPI_${LANG}_LIBRARY_VERSION_STRING)
+ else()
+ set(MPI_${LANG}_LIBRARY_VERSION_STRING "NOTFOUND")
+ endif()
+ endif()
+ endif()
+
+ set(MPI_${LANG}_FIND_QUIETLY ${MPI_FIND_QUIETLY})
+ set(MPI_${LANG}_FIND_VERSION ${MPI_FIND_VERSION})
+ set(MPI_${LANG}_FIND_VERSION_EXACT ${MPI_FIND_VERSION_EXACT})
+
+ unset(MPI_${LANG}_REQUIRED_VARS)
+ if (MPI_${LANG}_WRAPPER_FOUND OR MPI_${LANG}_GUESS_FOUND)
+ foreach(mpilibname IN LISTS MPI_${LANG}_LIB_NAMES)
+ list(APPEND MPI_${LANG}_REQUIRED_VARS "MPI_${mpilibname}_LIBRARY")
+ endforeach()
+ list(APPEND MPI_${LANG}_REQUIRED_VARS "MPI_${LANG}_LIB_NAMES")
+ if("${LANG}" STREQUAL "Fortran")
+ # For Fortran we only need one of the module or header directories to have *some* support for MPI.
+ if(NOT MPI_${LANG}_MODULE_DIR)
+ list(APPEND MPI_${LANG}_REQUIRED_VARS "MPI_${LANG}_F77_HEADER_DIR")
+ endif()
+ if(NOT MPI_${LANG}_F77_HEADER_DIR)
+ list(APPEND MPI_${LANG}_REQUIRED_VARS "MPI_${LANG}_MODULE_DIR")
+ endif()
+ else()
+ list(APPEND MPI_${LANG}_REQUIRED_VARS "MPI_${LANG}_HEADER_DIR")
+ endif()
+ if(MPI_${LANG}_ADDITIONAL_INCLUDE_VARS)
+ foreach(mpiincvar IN LISTS MPI_${LANG}_ADDITIONAL_INCLUDE_VARS)
+ list(APPEND MPI_${LANG}_REQUIRED_VARS "MPI_${mpiincvar}_INCLUDE_DIR")
+ endforeach()
+ endif()
+ # Append the works variable now. If the settings did not work, this will show up properly.
+ list(APPEND MPI_${LANG}_REQUIRED_VARS "MPI_${LANG}_WORKS")
+ else()
+ # If the compiler worked implicitly, use its path as output.
+ # Should the compiler variable be set, we also require it to work.
+ list(APPEND MPI_${LANG}_REQUIRED_VARS "MPI_${LANG}_COMPILER")
+ if(MPI_${LANG}_COMPILER)
+ list(APPEND MPI_${LANG}_REQUIRED_VARS "MPI_${LANG}_WORKS")
+ endif()
+ endif()
+ find_package_handle_standard_args(MPI_${LANG} REQUIRED_VARS ${MPI_${LANG}_REQUIRED_VARS}
+ VERSION_VAR MPI_${LANG}_VERSION)
+
+ if(DEFINED MPI_${LANG}_VERSION)
+ if(NOT _MPI_MIN_VERSION OR _MPI_MIN_VERSION VERSION_GREATER MPI_${LANG}_VERSION)
+ set(_MPI_MIN_VERSION MPI_${LANG}_VERSION)
+ endif()
+ endif()
+ endif()
+endforeach()
+
+unset(_MPI_REQ_VARS)
+foreach(LANG IN ITEMS C CXX Fortran)
+ if((NOT MPI_FIND_COMPONENTS AND CMAKE_${LANG}_COMPILER_LOADED) OR LANG IN_LIST MPI_FIND_COMPONENTS)
+ list(APPEND _MPI_REQ_VARS "MPI_${LANG}_FOUND")
+ endif()
+endforeach()
+
+if(MPICXX IN_LIST MPI_FIND_COMPONENTS)
+ list(APPEND _MPI_REQ_VARS "MPI_MPICXX_FOUND")
+endif()
+
+find_package_handle_standard_args(MPI
+ REQUIRED_VARS ${_MPI_REQ_VARS}
+ VERSION_VAR ${_MPI_MIN_VERSION}
+ HANDLE_COMPONENTS)
+
+#=============================================================================
+# More backward compatibility stuff
+
+# For compatibility reasons, we also define MPIEXEC
+set(MPIEXEC "${MPIEXEC_EXECUTABLE}")
+
+# Copy over MPI_<LANG>_INCLUDE_PATH from the assembled INCLUDE_DIRS.
+foreach(LANG IN ITEMS C CXX Fortran)
+ if(MPI_${LANG}_FOUND)
+ set(MPI_${LANG}_INCLUDE_PATH "${MPI_${LANG}_INCLUDE_DIRS}")
+ unset(MPI_${LANG}_COMPILE_FLAGS)
+ if(MPI_${LANG}_COMPILE_OPTIONS)
+ set(MPI_${LANG}_COMPILE_FLAGS "${MPI_${LANG}_COMPILE_OPTIONS}")
+ endif()
+ if(MPI_${LANG}_COMPILE_DEFINITIONS)
+ foreach(_MPI_DEF IN LISTS MPI_${LANG}_COMPILE_DEFINITIONS)
+ string(APPEND MPI_${LANG}_COMPILE_FLAGS " -D${_MPI_DEF}")
+ endforeach()
+ endif()
+ endif()
+endforeach()
+
+# Bare MPI sans ${LANG} vars are set to CXX then C, depending on what was found.
+# This mimics the behavior of the old language-oblivious FindMPI.
+set(_MPI_OLD_VARS COMPILER INCLUDE_PATH COMPILE_FLAGS LINK_FLAGS LIBRARIES)
+if (MPI_CXX_FOUND)
+ foreach (var ${_MPI_OLD_VARS})
+ set(MPI_${var} ${MPI_CXX_${var}})
+ endforeach()
+elseif (MPI_C_FOUND)
+ foreach (var ${_MPI_OLD_VARS})
+ set(MPI_${var} ${MPI_C_${var}})
+ endforeach()
+endif()
+
+# Chop MPI_LIBRARIES into the old-style MPI_LIBRARY and MPI_EXTRA_LIBRARY, and set them in cache.
+if (MPI_LIBRARIES)
+ list(GET MPI_LIBRARIES 0 MPI_LIBRARY_WORK)
+ set(MPI_LIBRARY "${MPI_LIBRARY_WORK}")
+ unset(MPI_LIBRARY_WORK)
+else()
+ set(MPI_LIBRARY "MPI_LIBRARY-NOTFOUND")
+endif()
+
+list(LENGTH MPI_LIBRARIES MPI_NUMLIBS)
+if (MPI_NUMLIBS GREATER 1)
+ set(MPI_EXTRA_LIBRARY_WORK "${MPI_LIBRARIES}")
+ list(REMOVE_AT MPI_EXTRA_LIBRARY_WORK 0)
+ set(MPI_EXTRA_LIBRARY "${MPI_EXTRA_LIBRARY_WORK}")
+ unset(MPI_EXTRA_LIBRARY_WORK)
+else()
+ set(MPI_EXTRA_LIBRARY "MPI_EXTRA_LIBRARY-NOTFOUND")
+endif()
+#=============================================================================
+
+# unset these vars to cleanup namespace
+unset(_MPI_OLD_VARS)
+unset(_MPI_PREFIX_PATH)
+unset(_MPI_BASE_DIR)
+foreach (lang C CXX Fortran)
+ unset(_MPI_${LANG}_COMPILER_NAMES)
+endforeach()
+
+cmake_policy(POP)
diff --git a/cmake/upstream/FindMPI/fortranparam_mpi.f90.in b/cmake/upstream/FindMPI/fortranparam_mpi.f90.in
new file mode 100644
index 0000000000000000000000000000000000000000..30f912c6279a859622039a002a1f4085fc8b72f5
--- /dev/null
+++ b/cmake/upstream/FindMPI/fortranparam_mpi.f90.in
@@ -0,0 +1,4 @@
+ program mpi_ver
+ @MPI_Fortran_INCLUDE_LINE@
+ print *, 'INFO:SUBARRAYS[', MPI_SUBARRAYS_SUPPORTED, ']-ASYNCPROT[', MPI_ASYNC_PROTECTS_NONBLOCKING, ']'
+ end program mpi_ver
diff --git a/cmake/upstream/FindMPI/libver_mpi.c b/cmake/upstream/FindMPI/libver_mpi.c
new file mode 100644
index 0000000000000000000000000000000000000000..be9d19d435b51803595515d47534093222162fbc
--- /dev/null
+++ b/cmake/upstream/FindMPI/libver_mpi.c
@@ -0,0 +1,19 @@
+#include <mpi.h>
+
+#ifdef __cplusplus
+#include <cstdio>
+#else
+#include <stdio.h>
+#endif
+
+int main(int argc, char* argv[])
+{
+ char mpilibver_str[MPI_MAX_LIBRARY_VERSION_STRING];
+ int mpilibver_len;
+ MPI_Get_library_version(mpilibver_str, &mpilibver_len);
+#ifdef __cplusplus
+ std::puts(mpilibver_str);
+#else
+ puts(mpilibver_str);
+#endif
+}
diff --git a/cmake/upstream/FindMPI/libver_mpi.f90.in b/cmake/upstream/FindMPI/libver_mpi.f90.in
new file mode 100644
index 0000000000000000000000000000000000000000..793858716848743b6e6096ec600c1284fccc0d9a
--- /dev/null
+++ b/cmake/upstream/FindMPI/libver_mpi.f90.in
@@ -0,0 +1,7 @@
+ program mpi_ver
+ @MPI_Fortran_INCLUDE_LINE@
+ character(len=MPI_MAX_LIBRARY_VERSION_STRING) :: mpilibver_str
+ integer(kind=MPI_INTEGER_KIND) :: ierror, reslen
+ call MPI_GET_LIBRARY_VERSION(mpilibver_str, reslen, ierror)
+ print *, mpilibver_str
+ end program mpi_ver
diff --git a/cmake/upstream/FindMPI/mpiver.f90.in b/cmake/upstream/FindMPI/mpiver.f90.in
new file mode 100644
index 0000000000000000000000000000000000000000..a25452385304f7e40370deb9ca2e1102bf9eb68c
--- /dev/null
+++ b/cmake/upstream/FindMPI/mpiver.f90.in
@@ -0,0 +1,10 @@
+ program mpi_ver
+ @MPI_Fortran_INCLUDE_LINE@
+ integer(kind=kind(MPI_VERSION)), parameter :: zero = ichar('0')
+ character, dimension(17), parameter :: mpiver_str =&
+ (/ 'I', 'N', 'F', 'O', ':', 'M', 'P', 'I', '-', 'V', 'E', 'R', '[', &
+ char(zero + MPI_VERSION), &
+ '.', &
+ char(zero + MPI_SUBVERSION), ']' /)
+ print *, mpiver_str
+ end program mpi_ver
diff --git a/cmake/upstream/FindMPI/test_mpi.c b/cmake/upstream/FindMPI/test_mpi.c
new file mode 100644
index 0000000000000000000000000000000000000000..b8a308a4b0ee0aed363a0cf8c1669974a937eeae
--- /dev/null
+++ b/cmake/upstream/FindMPI/test_mpi.c
@@ -0,0 +1,37 @@
+#include <mpi.h>
+
+#ifdef __cplusplus
+#include <cstdio>
+#else
+#include <stdio.h>
+#endif
+
+#if defined(MPI_VERSION) && defined(MPI_SUBVERSION)
+const char mpiver_str[] = { 'I', 'N',
+ 'F', 'O',
+ ':', 'M',
+ 'P', 'I',
+ '-', 'V',
+ 'E', 'R',
+ '[', ('0' + MPI_VERSION),
+ '.', ('0' + MPI_SUBVERSION),
+ ']', '\0' };
+#endif
+
+int main(int argc, char* argv[])
+{
+#if defined(MPI_VERSION) && defined(MPI_SUBVERSION)
+#ifdef __cplusplus
+ std::puts(mpiver_str);
+#else
+ puts(mpiver_str);
+#endif
+#endif
+#ifdef TEST_MPI_MPICXX
+ MPI::MPI_Init(&argc, &argv);
+ MPI::MPI_Finalize();
+#else
+ MPI_Init(&argc, &argv);
+ MPI_Finalize();
+#endif
+}
diff --git a/cmake/upstream/FindMPI/test_mpi.cxx b/cmake/upstream/FindMPI/test_mpi.cxx
new file mode 100644
index 0000000000000000000000000000000000000000..144dc4e591c767bc19d63800afa6c7c47521f958
--- /dev/null
+++ b/cmake/upstream/FindMPI/test_mpi.cxx
@@ -0,0 +1,23 @@
+#include <mpi.h>
+#include <cstdio>
+
+#if defined(MPI_VERSION) && defined(MPI_SUBVERSION)
+const char mpiver_str[] = { 'I', 'N',
+ 'F', 'O',
+ ':', 'M',
+ 'P', 'I',
+ '-', 'V',
+ 'E', 'R',
+ '[', ('0' + MPI_VERSION),
+ '.', ('0' + MPI_SUBVERSION),
+ ']', '\0' };
+#endif
+
+int main(int argc, char* argv[])
+{
+#if defined(MPI_VERSION) && defined(MPI_SUBVERSION)
+ std::puts(mpiver_str);
+#endif
+ MPI::MPI_Init(&argc, &argv);
+ MPI::MPI_Finalize();
+}
diff --git a/cmake/upstream/FindMPI/test_mpi.f90.in b/cmake/upstream/FindMPI/test_mpi.f90.in
new file mode 100644
index 0000000000000000000000000000000000000000..4d43a04d65d1bc1e43370446f778b840f3cd53f8
--- /dev/null
+++ b/cmake/upstream/FindMPI/test_mpi.f90.in
@@ -0,0 +1,6 @@
+ program hello
+ @MPI_Fortran_INCLUDE_LINE@
+ integer@MPI_Fortran_INTEGER_LINE@ ierror
+ call MPI_INIT(ierror)
+ call MPI_FINALIZE(ierror)
+ end program
diff --git a/cmake/upstream/FindMPI/test_mpi_c.cxx b/cmake/upstream/FindMPI/test_mpi_c.cxx
new file mode 100644
index 0000000000000000000000000000000000000000..1597b6041af84b390354d2b0dffb2402adccbf43
--- /dev/null
+++ b/cmake/upstream/FindMPI/test_mpi_c.cxx
@@ -0,0 +1,23 @@
+#include <mpi.h>
+#include <cstdio>
+
+#if defined(MPI_VERSION) && defined(MPI_SUBVERSION)
+const char mpiver_str[] = { 'I', 'N',
+ 'F', 'O',
+ ':', 'M',
+ 'P', 'I',
+ '-', 'V',
+ 'E', 'R',
+ '[', ('0' + MPI_VERSION),
+ '.', ('0' + MPI_SUBVERSION),
+ ']', '\0' };
+#endif
+
+int main(int argc, char* argv[])
+{
+#if defined(MPI_VERSION) && defined(MPI_SUBVERSION)
+ std::puts(mpiver_str);
+#endif
+ MPI_Init(&argc, &argv);
+ MPI_Finalize();
+}