diff options
| author | Allen Byrne <byrn@hdfgroup.org> | 2017-11-01 18:41:44 (GMT) |
|---|---|---|
| committer | Allen Byrne <byrn@hdfgroup.org> | 2017-11-01 18:41:44 (GMT) |
| commit | f8fd6d0b41a242aae93689e1477478bc78bae471 (patch) | |
| tree | d85ec9fabc353b7b401f48216000cbc37b7835f6 /config | |
| parent | 930cfc402dc2f17b1dbe9a6b3c5e15b95cc4c7ea (diff) | |
| download | hdf5-f8fd6d0b41a242aae93689e1477478bc78bae471.zip hdf5-f8fd6d0b41a242aae93689e1477478bc78bae471.tar.gz hdf5-f8fd6d0b41a242aae93689e1477478bc78bae471.tar.bz2 | |
Correct usage of MPI vars
Diffstat (limited to 'config')
| -rw-r--r-- | config/cmake/UseJava.cmake | 6 | ||||
| -rw-r--r-- | config/cmake/hdf5-config.cmake.in | 8 | ||||
| -rw-r--r-- | config/cmake_ext_mod/FindMPI.cmake | 1754 |
3 files changed, 1249 insertions, 519 deletions
diff --git a/config/cmake/UseJava.cmake b/config/cmake/UseJava.cmake index 9b3bf02..52b37a9 100644 --- a/config/cmake/UseJava.cmake +++ b/config/cmake/UseJava.cmake @@ -482,6 +482,8 @@ function(add_jar _TARGET_NAME) else() get_filename_component(_add_jar_OUTPUT_DIR ${_add_jar_OUTPUT_DIR} ABSOLUTE) endif() + # ensure output directory exists + file (MAKE_DIRECTORY "${_add_jar_OUTPUT_DIR}") if (_add_jar_ENTRY_POINT) set(_ENTRY_POINT_OPTION e) @@ -516,7 +518,7 @@ function(add_jar _TARGET_NAME) set(CMAKE_JAVA_INCLUDE_PATH_FINAL "${CMAKE_JAVA_INCLUDE_PATH_FINAL}${CMAKE_JAVA_INCLUDE_FLAG_SEP}${JAVA_INCLUDE_DIR}") endforeach() - set(CMAKE_JAVA_CLASS_OUTPUT_PATH "${_add_jar_OUTPUT_DIR}${CMAKE_FILES_DIRECTORY}/${_TARGET_NAME}.dir") + set(CMAKE_JAVA_CLASS_OUTPUT_PATH "${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/${_TARGET_NAME}.dir") set(_JAVA_TARGET_OUTPUT_NAME "${_TARGET_NAME}.jar") if (_add_jar_OUTPUT_NAME AND _add_jar_VERSION) @@ -547,7 +549,7 @@ function(add_jar _TARGET_NAME) list(APPEND _JAVA_COMPILE_FILELISTS ${_JAVA_FULL}) elseif (_JAVA_EXT MATCHES ".java") - file(RELATIVE_PATH _JAVA_REL_BINARY_PATH ${_add_jar_OUTPUT_DIR} ${_JAVA_FULL}) + file(RELATIVE_PATH _JAVA_REL_BINARY_PATH ${CMAKE_CURRENT_BINARY_DIR} ${_JAVA_FULL}) file(RELATIVE_PATH _JAVA_REL_SOURCE_PATH ${CMAKE_CURRENT_SOURCE_DIR} ${_JAVA_FULL}) string(LENGTH ${_JAVA_REL_BINARY_PATH} _BIN_LEN) string(LENGTH ${_JAVA_REL_SOURCE_PATH} _SRC_LEN) diff --git a/config/cmake/hdf5-config.cmake.in b/config/cmake/hdf5-config.cmake.in index 712dc05..01c27df 100644 --- a/config/cmake/hdf5-config.cmake.in +++ b/config/cmake/hdf5-config.cmake.in @@ -50,8 +50,12 @@ set (${HDF5_PACKAGE_NAME}_TOOLSET "@CMAKE_GENERATOR_TOOLSET@") # Dependencies #----------------------------------------------------------------------------- if (${HDF5_PACKAGE_NAME}_ENABLE_PARALLEL) - set (${HDF5_PACKAGE_NAME}_MPI_C_INCLUDE_PATH "@MPI_C_INCLUDE_PATH@") + set (${HDF5_PACKAGE_NAME}_MPI_C_INCLUDE_PATH "@MPI_C_INCLUDE_DIRS@") set (${HDF5_PACKAGE_NAME}_MPI_C_LIBRARIES "@MPI_C_LIBRARIES@") + if (${HDF5_PACKAGE_NAME}_BUILD_FORTRAN) + set (${HDF5_PACKAGE_NAME}_MPI_Fortran_INCLUDE_PATH "@MPI_Fortran_INCLUDE_DIRS@") + set (${HDF5_PACKAGE_NAME}_MPI_Fortran_LIBRARIES "@MPI_Fortran_LIBRARIES@") + endif () endif () if (${HDF5_PACKAGE_NAME}_BUILD_JAVA) @@ -67,7 +71,7 @@ endif () #----------------------------------------------------------------------------- # Directories #----------------------------------------------------------------------------- -set (${HDF5_PACKAGE_NAME}_INCLUDE_DIR "@PACKAGE_INCLUDE_INSTALL_DIR@" "${${HDF5_PACKAGE_NAME}_MPI_C_INCLUDE_PATH}") +set (${HDF5_PACKAGE_NAME}_INCLUDE_DIR "@PACKAGE_INCLUDE_INSTALL_DIR@" "${${HDF5_PACKAGE_NAME}_MPI_C_INCLUDE_DIRS}") set (${HDF5_PACKAGE_NAME}_SHARE_DIR "@PACKAGE_SHARE_INSTALL_DIR@") set_and_check (${HDF5_PACKAGE_NAME}_BUILD_DIR "@PACKAGE_CURRENT_BUILD_DIR@") diff --git a/config/cmake_ext_mod/FindMPI.cmake b/config/cmake_ext_mod/FindMPI.cmake index f566ade..61ab4a4 100644 --- a/config/cmake_ext_mod/FindMPI.cmake +++ b/config/cmake_ext_mod/FindMPI.cmake @@ -4,27 +4,45 @@ # FindMPI # ------- # -# Find a Message Passing Interface (MPI) implementation +# 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 -# ^^^^^^^^^ +# 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. +# 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 wrapper for ``<lang>``. -# ``MPI_<lang>_COMPILE_FLAGS`` -# Compilation flags for MPI programs, separated by spaces. -# This is *not* a :ref:`;-list <CMake Language Lists>`. -# ``MPI_<lang>_INCLUDE_PATH`` +# 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. @@ -36,53 +54,172 @@ # ``MPI::MPI_<lang>`` # Target for using MPI from ``<lang>``. # -# Additionally, FindMPI sets the following variables for running MPI -# programs from the command line: +# The following variables indicating which bindings are present will be defined: # -# ``MPIEXEC`` -# Executable for running MPI programs, if provided. +# ``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. +# 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. +# Flags to pass to ``mpiexec`` directly before the executable to run. # ``MPIEXEC_POSTFLAGS`` -# Flags to pass to ``MPIEXEC`` after other flags. +# 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: # -# Usage -# ^^^^^ +# ``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. # -# To use this module, call ``find_package(MPI)``. If you are happy with the -# auto-detected configuration for your language, then you're done. If -# not, you have two options: +# Each of the search steps may be skipped with the following control variables: # -# 1. Set ``MPI_<lang>_COMPILER`` to the MPI wrapper (e.g. ``mpicc``) of your -# choice and reconfigure. FindMPI will attempt to determine all the -# necessary variables using *that* compiler's compile and link flags. -# 2. If this fails, or if your MPI implementation does not come with -# a compiler wrapper, then set both ``MPI_<lang>_LIBRARIES`` and -# ``MPI_<lang>_INCLUDE_PATH``. You may also set any other variables -# listed above, but these two are required. This will circumvent -# autodetection entirely. +# ``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. # -# When configuration is successful, ``MPI_<lang>_COMPILER`` will be set to -# the compiler wrapper for ``<lang>``, if it was found. ``MPI_<lang>_FOUND`` -# and other variables above will be set if any MPI implementation was -# found for ``<lang>``, regardless of whether a compiler was found. +# Additionally, the following control variable is available to change search behavior: # -# When using ``MPIEXEC`` to execute MPI applications, you should typically -# use all of the ``MPIEXEC`` flags as follows: +# ``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} ${MPIEXEC_NUMPROC_FLAG} ${MPIEXEC_MAX_NUMPROCS} +# ${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 # ^^^^^^^^^^^^^^^^^^^^^^ # @@ -91,54 +228,62 @@ # # :: # -# MPI_FOUND MPI_COMPILER MPI_LIBRARY -# MPI_COMPILE_FLAGS MPI_INCLUDE_PATH MPI_EXTRA_LIBRARY -# MPI_LINK_FLAGS MPI_LIBRARIES +# 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 this to handle the QUIETLY and REQUIRED arguments include(${CMAKE_ROOT}/Modules/FindPackageHandleStandardArgs.cmake) include(GetPrerequisites) -# -# This part detects MPI compilers, attempting to wade through the mess of compiler names in -# a sensible way. -# -# The compilers are detected in this order: -# -# 1. Try to find the most generic available MPI compiler, as this is usually set up by -# cluster admins, e.g. if plain old mpicc is available, we'll use it and assume it's -# the right compiler. -# -# 2. If a generic mpicc is NOT found, then we attempt to find one that matches -# CMAKE_<lang>_COMPILER_ID. e.g. if you are using XL compilers, we'll try to find mpixlc -# and company, but not mpiicc. This hopefully prevents toolchain mismatches. -# -# If you want to force a particular MPI compiler other than what we autodetect (e.g. if you -# want to compile regular stuff with GNU and parallel stuff with Intel), you can always set -# your favorite MPI_<lang>_COMPILER explicitly and this stuff will be ignored. -# - -# Start out with the generic MPI compiler names, as these are most commonly used. -set(_MPI_C_COMPILER_NAMES mpicc mpcc mpicc_r mpcc_r mpicc.bat) -set(_MPI_CXX_COMPILER_NAMES mpicxx mpiCC mpcxx mpCC mpic++ mpc++ - mpicxx_r mpiCC_r mpcxx_r mpCC_r mpic++_r mpc++_r - mpicxx.bat) -set(_MPI_Fortran_COMPILER_NAMES mpif95 mpif95_r mpf95 mpf95_r +# 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) + 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) +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 -set(_MPI_Intel_C_COMPILER_NAMES mpiicc mpiicc.bat) -set(_MPI_Intel_CXX_COMPILER_NAMES mpiicpc mpiicxx mpiic++ mpiiCC mpiicpc.bat) -set(_MPI_Intel_Fortran_COMPILER_NAMES mpiifort mpiif95 mpiif90 mpiif77 mpiifort.bat) +# 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) @@ -154,548 +299,1127 @@ set(_MPI_XL_Fortran_COMPILER_NAMES mpixlf95 mpixlf95_r mpxlf95 mpxlf95 mpixlf77 mpixlf77_r mpxlf77 mpxlf77_r mpixlf mpixlf_r mpxlf mpxlf_r) -# append vendor-specific compilers to the list if we either don't know the compiler id, -# or if we know it matches the regular compiler. -foreach (lang C CXX Fortran) - foreach (id GNU Intel PGI XL) - if (NOT CMAKE_${lang}_COMPILER_ID OR CMAKE_${lang}_COMPILER_ID STREQUAL id) - list(APPEND _MPI_${lang}_COMPILER_NAMES ${_MPI_${id}_${lang}_COMPILER_NAMES}) +# Prepend vendor-specific compiler wrappers to the list. If we don't know the compiler, +# attempt all of them. +# By attempting vendor-specific compiler names first, we should avoid situations where the compiler wrapper +# stems from a proprietary MPI and won't know which compiler it's being used for. For instance, Intel MPI +# controls its settings via the I_MPI_CC environment variables if the generic name is being used. +# If we know which compiler we're working with, we can use the most specialized wrapper there is in order to +# pick up the right settings for it. +foreach (LANG IN ITEMS C CXX Fortran) + set(_MPI_${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) # clean up the namespace here + 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) -# Names to try for MPI exec -set(_MPI_EXEC_NAMES mpiexec mpirun lamexec srun) - -# Grab the path to MPI from the registry if we're on windows. -set(_MPI_PREFIX_PATH) -if(WIN32) - # MSMPI - file(TO_CMAKE_PATH "$ENV{MSMPI_BIN}" msmpi_bin_path) # The default path ends with a '\' and doesn't mix with ';' when appending. - list(APPEND _MPI_PREFIX_PATH "${msmpi_bin_path}") - unset(msmpi_bin_path) - list(APPEND _MPI_PREFIX_PATH "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\MPI;InstallRoot]/Bin") - list(APPEND _MPI_PREFIX_PATH "$ENV{MSMPI_INC}/..") # The SDK is installed separately from the runtime - # MPICH - list(APPEND _MPI_PREFIX_PATH "[HKEY_LOCAL_MACHINE\\SOFTWARE\\MPICH\\SMPD;binary]/..") - list(APPEND _MPI_PREFIX_PATH "[HKEY_LOCAL_MACHINE\\SOFTWARE\\MPICH2;Path]") - list(APPEND _MPI_PREFIX_PATH "$ENV{ProgramW6432}/MPICH2/") - # INTEL MPI - list(APPEND _MPI_PREFIX_PATH "$ENV{I_MPI_ROOT}/intel64/") - -endif() - -# Build a list of prefixes to search for MPI. -foreach(SystemPrefixDir ${CMAKE_SYSTEM_PREFIX_PATH}) - foreach(MpiPackageDir ${_MPI_PREFIX_PATH}) - if(EXISTS ${SystemPrefixDir}/${MpiPackageDir}) - list(APPEND _MPI_PREFIX_PATH "${SystemPrefixDir}/${MpiPackageDir}") - endif() - endforeach() +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 compiler options cmdvar resvar) +function (_MPI_check_compiler LANG QUERY_FLAG OUTPUT_VARIABLE RESULT_VARIABLE) + if(DEFINED MPI_${LANG}_COMPILER_FLAGS) + separate_arguments(_MPI_COMPILER_WRAPPER_OPTIONS NATIVE_COMMAND "${MPI_${LANG}_COMPILER_FLAGS}") + else() + separate_arguments(_MPI_COMPILER_WRAPPER_OPTIONS NATIVE_COMMAND "${MPI_COMPILER_FLAGS}") + endif() execute_process( - COMMAND "${compiler}" ${options} - OUTPUT_VARIABLE cmdline OUTPUT_STRIP_TRAILING_WHITESPACE - ERROR_VARIABLE cmdline ERROR_STRIP_TRAILING_WHITESPACE - RESULT_VARIABLE success) - # Intel MPI 5.0.1 will return a zero return code even when the - # argument to the MPI compiler wrapper is unknown. Attempt to - # catch this case. - if(cmdline MATCHES "undefined reference" OR cmdline MATCHES "unrecognized") - set(success 255 ) - endif() - set(${cmdvar} "${cmdline}" PARENT_SCOPE) - set(${resvar} "${success}" PARENT_SCOPE) + 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() -# -# interrogate_mpi_compiler(lang try_libs) -# -# Attempts to extract compiler and linker args from an MPI compiler. The arguments set -# by this function are: -# -# MPI_<lang>_INCLUDE_PATH MPI_<lang>_LINK_FLAGS MPI_<lang>_FOUND -# MPI_<lang>_COMPILE_FLAGS MPI_<lang>_LIBRARIES -# -# MPI_<lang>_COMPILER must be set beforehand to the absolute path to an MPI compiler for -# <lang>. Additionally, MPI_<lang>_INCLUDE_PATH and MPI_<lang>_LIBRARIES may be set -# to skip autodetection. -# -# If try_libs is TRUE, this will also attempt to find plain MPI libraries in the usual -# way. In general, this is not as effective as interrogating the compilers, as it -# ignores language-specific flags and libraries. However, some MPI implementations -# (Windows implementations) do not have compiler wrappers, so this approach must be used. -# -function (interrogate_mpi_compiler lang try_libs) - # MPI_${lang}_NO_INTERROGATE will be set to a compiler name when the *regular* compiler was - # discovered to be the MPI compiler. This happens on machines like the Cray XE6 that use - # modules to set cc, CC, and ftn to the MPI compilers. If the user force-sets another MPI - # compiler, MPI_${lang}_COMPILER won't be equal to MPI_${lang}_NO_INTERROGATE, and we'll - # inspect that compiler anew. This allows users to set new compilers w/o rm'ing cache. - string(COMPARE NOTEQUAL "${MPI_${lang}_NO_INTERROGATE}" "${MPI_${lang}_COMPILER}" interrogate) - - # If MPI is set already in the cache, don't bother with interrogating the compiler. - if (interrogate AND ((NOT MPI_${lang}_INCLUDE_PATH) OR (NOT MPI_${lang}_LIBRARIES))) - if (MPI_${lang}_COMPILER) - # Check whether the -showme:compile option works. This indicates that we have either OpenMPI - # or a newer version of LAM-MPI, and implies that -showme:link will also work. - _mpi_check_compiler("${MPI_${lang}_COMPILER}" "-showme:compile" MPI_COMPILE_CMDLINE MPI_COMPILER_RETURN) - if (MPI_COMPILER_RETURN EQUAL 0) - # If we appear to have -showme:compile, then we should - # also have -showme:link. Try it. - execute_process( - COMMAND ${MPI_${lang}_COMPILER} -showme:link - OUTPUT_VARIABLE MPI_LINK_CMDLINE OUTPUT_STRIP_TRAILING_WHITESPACE - ERROR_VARIABLE MPI_LINK_CMDLINE ERROR_STRIP_TRAILING_WHITESPACE - RESULT_VARIABLE MPI_COMPILER_RETURN) - - if (MPI_COMPILER_RETURN EQUAL 0) - # We probably have -showme:incdirs and -showme:libdirs as well, - # so grab that while we're at it. - execute_process( - COMMAND ${MPI_${lang}_COMPILER} -showme:incdirs - OUTPUT_VARIABLE MPI_INCDIRS OUTPUT_STRIP_TRAILING_WHITESPACE - ERROR_VARIABLE MPI_INCDIRS ERROR_STRIP_TRAILING_WHITESPACE) - - execute_process( - COMMAND ${MPI_${lang}_COMPILER} -showme:libdirs - OUTPUT_VARIABLE MPI_LIBDIRS OUTPUT_STRIP_TRAILING_WHITESPACE - ERROR_VARIABLE MPI_LIBDIRS ERROR_STRIP_TRAILING_WHITESPACE) +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() - else() - # reset things here if something went wrong. - set(MPI_COMPILE_CMDLINE) - set(MPI_LINK_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) - # Older versions of LAM-MPI have "-showme". Try to find that. if (NOT MPI_COMPILER_RETURN EQUAL 0) - _mpi_check_compiler("${MPI_${lang}_COMPILER}" "-showme" MPI_COMPILE_CMDLINE MPI_COMPILER_RETURN) + unset(MPI_COMPILE_CMDLINE) endif() + endif() + endif() - # MVAPICH uses -compile-info and -link-info. Try them. - if (NOT MPI_COMPILER_RETURN EQUAL 0) - _mpi_check_compiler("${MPI_${lang}_COMPILER}" "-compile-info" MPI_COMPILE_CMDLINE MPI_COMPILER_RETURN) - - # If we have compile-info, also have link-info. - if (MPI_COMPILER_RETURN EQUAL 0) - execute_process( - COMMAND ${MPI_${lang}_COMPILER} -link-info - OUTPUT_VARIABLE MPI_LINK_CMDLINE OUTPUT_STRIP_TRAILING_WHITESPACE - ERROR_VARIABLE MPI_LINK_CMDLINE ERROR_STRIP_TRAILING_WHITESPACE - RESULT_VARIABLE MPI_COMPILER_RETURN) - 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(${LANG} "-show" MPI_COMPILE_CMDLINE MPI_COMPILER_RETURN) + endif() - # make sure we got compile and link. Reset vars if something's wrong. - if (NOT MPI_COMPILER_RETURN EQUAL 0) - set(MPI_COMPILE_CMDLINE) - set(MPI_LINK_CMDLINE) - endif() - endif() + # Older versions of LAM/MPI have "-showme". Open MPI also supports this. + # Unknown to MPICH, MVAPICH and Intel MPI. + if (NOT MPI_COMPILER_RETURN EQUAL 0) + _MPI_check_compiler(${LANG} "-showme" MPI_COMPILE_CMDLINE MPI_COMPILER_RETURN) + endif() - # MPICH just uses "-show". Try it. - if (NOT MPI_COMPILER_RETURN EQUAL 0) - _mpi_check_compiler("${MPI_${lang}_COMPILER}" "-show" 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) - if (MPI_COMPILER_RETURN EQUAL 0) - # 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 MPI_LINK_CMDLINE) - set(MPI_LINK_CMDLINE ${MPI_COMPILE_CMDLINE}) - endif() + # We have our command lines, but we might need to copy MPI_COMPILE_CMDLINE + # into MPI_LINK_CMDLINE, if we didn't find the link line. + if (NOT DEFINED MPI_LINK_CMDLINE) + set(MPI_LINK_CMDLINE "${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 "${MPI_COMPILE_CMDLINE}") + + # If extracting failed to work, we'll try using -showme:incdirs. + if (NOT MPI_ALL_INCLUDE_PATHS) + _MPI_check_compiler(${LANG} "-showme:incdirs" MPI_INCDIRS_CMDLINE MPI_INCDIRS_COMPILER_RETURN) + if(MPI_INCDIRS_COMPILER_RETURN) + separate_arguments(MPI_ALL_INCLUDE_PATHS NATIVE_COMMAND "${MPI_INCDIRS_CMDLINE}") + endif() + endif() + + foreach(_MPI_INCLUDE_PATH IN LISTS MPI_ALL_INCLUDE_PATHS) + string(REGEX REPLACE "^ ?[-/]I" "" _MPI_INCLUDE_PATH "${_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 "${_MPI_INCLUDE_PATH}") + endforeach() + + # Extract linker paths from the link command line + string(REGEX MATCHALL "(^| )(-Wl,|-Xlinker |)(-L|[/-]LIBPATH:|[/-]libpath:)([^\" ]+|\"[^\"]+\")" MPI_ALL_LINK_PATHS "${MPI_LINK_CMDLINE}") + + # If extracting failed to work, we'll try using -showme:libdirs. + if (NOT MPI_ALL_LINK_PATHS) + _MPI_check_compiler(${LANG} "-showme:libdirs" MPI_LIBDIRS_CMDLINE MPI_LIBDIRS_COMPILER_RETURN) + if(MPI_LIBDIRS_COMPILER_RETURN) + separate_arguments(MPI_ALL_LINK_PATHS NATIVE_COMMAND "${MPI_LIBDIRS_CMDLINE}") + endif() + endif() + + 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() + + # 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() - message(STATUS "Unable to determine MPI from MPI driver ${MPI_${lang}_COMPILER}") - set(MPI_COMPILE_CMDLINE) - set(MPI_LINK_CMDLINE) + set(MPI_LINK_FLAGS_WORK "${_MPI_LINK_FLAG}") endif() + endif() + endforeach() - # Here, we're done with the interrogation part, and we'll try to extract args we care - # about from what we learned from the compiler wrapper scripts. - - # If interrogation came back with something, extract our variable from the MPI command line - if (MPI_COMPILE_CMDLINE OR MPI_LINK_CMDLINE) - # Extract compile flags from the compile command line. - string(REGEX MATCHALL "(^| )-[Df]([^\" ]+|\"[^\"]+\")" MPI_ALL_COMPILE_FLAGS "${MPI_COMPILE_CMDLINE}") - set(MPI_COMPILE_FLAGS_WORK) + # Extract the set of libraries to link against from the link command + # line + string(REGEX MATCHALL "(^| )-l([^\" ]+|\"[^\"]+\")" MPI_LIBNAMES "${MPI_LINK_CMDLINE}") - foreach(FLAG ${MPI_ALL_COMPILE_FLAGS}) - string(REGEX REPLACE "^ " "" FLAG ${FLAG}) - if (MPI_COMPILE_FLAGS_WORK) - set(MPI_COMPILE_FLAGS_WORK "${MPI_COMPILE_FLAGS_WORK} ${FLAG}") - else() - set(MPI_COMPILE_FLAGS_WORK ${FLAG}) - endif() - endforeach() + foreach(_MPI_LIB_NAME IN LISTS MPI_LIBNAMES) + string(REGEX REPLACE "^ ?-l" "" _MPI_LIB_NAME "${_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 "${_MPI_LIB_NAME}") + endif() + endforeach() - # Extract include paths from compile command line - string(REGEX MATCHALL "(^| )-I([^\" ]+|\"[^\"]+\")" MPI_ALL_INCLUDE_PATHS "${MPI_COMPILE_CMDLINE}") - set(MPI_INCLUDE_PATH_WORK) + 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() - foreach(IPATH ${MPI_ALL_INCLUDE_PATHS}) - string(REGEX REPLACE "^ ?-I" "" IPATH ${IPATH}) - string(REPLACE "//" "/" IPATH ${IPATH}) - string(REPLACE "\"" "" IPATH ${IPATH}) - file(TO_CMAKE_PATH "${IPATH}" IPATH) - list(APPEND MPI_INCLUDE_PATH_WORK ${IPATH}) - endforeach() + # An MPI compiler wrapper could have its MPI libraries in the implictly + # linked directories of the compiler itself. + if(DEFINED CMAKE_${LANG}_IMPLICIT_LINK_DIRECTORIES) + list(APPEND MPI_LINK_DIRECTORIES_WORK "${CMAKE_${LANG}_IMPLICIT_LINK_DIRECTORIES}") + endif() - # try using showme:incdirs if extracting didn't work. - if (NOT MPI_INCLUDE_PATH_WORK) - set(MPI_INCLUDE_PATH_WORK ${MPI_INCDIRS}) - separate_arguments(MPI_INCLUDE_PATH_WORK) - endif() + # Determine full path names for all of the libraries that one needs + # to link against in an MPI program + unset(MPI_PLAIN_LIB_NAMES_WORK) + foreach(_MPI_LIB_NAME IN LISTS MPI_LIB_NAMES_WORK) + get_filename_component(_MPI_PLAIN_LIB_NAME "${_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() - # If all else fails, just search for mpi.h in the normal include paths. - if (NOT MPI_INCLUDE_PATH_WORK) - set(MPI_HEADER_PATH "MPI_HEADER_PATH-NOTFOUND" CACHE FILEPATH "Cleared" FORCE) - find_path(MPI_HEADER_PATH mpi.h - HINTS ${_MPI_BASE_DIR} ${_MPI_PREFIX_PATH} - PATH_SUFFIXES include) - set(MPI_INCLUDE_PATH_WORK ${MPI_HEADER_PATH}) - endif() + # Deal with the libraries given with full path next + unset(MPI_DIRECT_LIB_NAMES_WORK) + foreach(_MPI_LIB_FULLPATH IN LISTS MPI_LIB_FULLPATHS_WORK) + get_filename_component(_MPI_PLAIN_LIB_NAME "${_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() - # Extract linker paths from the link command line - string(REGEX MATCHALL "(^| |-Wl,)(-L|/LIBPATH:)([^\" ]+|\"[^\"]+\")" MPI_ALL_LINK_PATHS "${MPI_LINK_CMDLINE}") - set(MPI_LINK_PATH) - foreach(LPATH ${MPI_ALL_LINK_PATHS}) - string(REGEX REPLACE "^(| |-Wl,)(-L|/LIBPATH:)" "" LPATH ${LPATH}) - string(REPLACE "//" "/" LPATH ${LPATH}) - list(APPEND MPI_LINK_PATH ${LPATH}) - endforeach() + # MPI might require pthread to work. The above mechanism wouldn't detect it, but we need to + # link it in that case. -lpthread is covered by the normal library treatment on the other hand. + if("${MPI_COMPILE_CMDLINE}" MATCHES "-pthread") + list(APPEND MPI_COMPILE_OPTIONS_WORK "-pthread") + if(MPI_LINK_FLAGS_WORK) + string(APPEND MPI_LINK_FLAGS_WORK " -pthread") + else() + set(MPI_LINK_FLAGS_WORK "-pthread") + endif() + endif() - # try using showme:libdirs if extracting didn't work. - if (NOT MPI_LINK_PATH) - set(MPI_LINK_PATH ${MPI_LIBDIRS}) - separate_arguments(MPI_LINK_PATH) - endif() + # If we found MPI, set up all of the appropriate cache entries + if(NOT MPI_${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() - # Extract linker flags from the link command line - string(REGEX MATCHALL "(^| )(-Wl,|-Xlinker )([^\" ]+|\"[^\"]+\")" MPI_ALL_LINK_FLAGS "${MPI_LINK_CMDLINE}") - set(MPI_LINK_FLAGS_WORK) - foreach(FLAG ${MPI_ALL_LINK_FLAGS}) - string(REGEX REPLACE "^ " "" FLAG ${FLAG}) - if (MPI_LINK_FLAGS_WORK) - set(MPI_LINK_FLAGS_WORK "${MPI_LINK_FLAGS_WORK} ${FLAG}") - else() - set(MPI_LINK_FLAGS_WORK ${FLAG}) - endif() - endforeach() +function(_MPI_guess_settings LANG) + set(MPI_GUESS_FOUND FALSE) + # Currently only MSMPI and MPICH2 on Windows are supported, so we can skip this search if we're not targeting that. + if(WIN32) + # MSMPI + + # The environment variables MSMPI_INC and MSMPILIB32/64 are the only ways of locating the MSMPI_SDK, + # which is installed separately from the runtime. Thus it's possible to have mpiexec but not MPI headers + # or import libraries and vice versa. + if(NOT MPI_GUESS_LIBRARY_NAME OR "${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 "$ENV{MSMPI_INC}/x86") + endif() - # Extract the set of libraries to link against from the link command - # line - string(REGEX MATCHALL "(^| )-l([^\" ]+|\"[^\"]+\")" MPI_LIBNAMES "${MPI_LINK_CMDLINE}") - if(WIN32) - # The intel wrappers on windows link against static versions of the MPI libraries. - # The static libraries are simply listed on the command line without -l. - # For instance: " icl ... impi.lib " - string(REGEX MATCHALL "(^| )([^\" ]+)\\.lib" tmp "${MPI_LINK_CMDLINE}") - list(APPEND MPI_LIBNAMES ${tmp}) + 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 ${LANG} additional include directories" FORCE) + unset(MPI_MSMPI_INC_DIR) endif() - # add the compiler implicit directories because some compilers - # such as the intel compiler have libraries that show up - # in the showme list that can only be found in the implicit - # link directories of the compiler. - if (DEFINED CMAKE_${lang}_IMPLICIT_LINK_DIRECTORIES) - set(MPI_LINK_PATH "${MPI_LINK_PATH};${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 - foreach(LIB ${MPI_LIBNAMES}) - string(REGEX REPLACE "^ ?-l" "" LIB ${LIB}) - if(WIN32) - string(REGEX REPLACE "\\.lib$" "" LIB ${LIB}) + # 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() - string(STRIP ${LIB} LIB) - # MPI_LIB is cached by find_library, but we don't want that. Clear it first. - set(MPI_LIB "MPI_LIB-NOTFOUND" CACHE FILEPATH "Cleared" FORCE) - find_library(MPI_LIB NAMES ${LIB} HINTS ${MPI_LINK_PATH}) - - if (MPI_LIB) - list(APPEND MPI_LIBRARIES_WORK ${MPI_LIB}) - elseif (NOT MPI_FIND_QUIETLY) - message(WARNING "Unable to find MPI library ${LIB}") + foreach(mpistrlenpos IN ITEMS e m) + foreach(mpicallingconv IN LISTS MPI_MSMPI_CALLINGCONVS) + find_library(MPI_msmpif${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 ${LANG} libraries to link against" FORCE) endif() - endforeach() - # Sanity check MPI_LIBRARIES to make sure there are enough libraries - list(LENGTH MPI_LIBRARIES_WORK MPI_NUMLIBS) - list(LENGTH MPI_LIBNAMES MPI_NUMLIBS_EXPECTED) - if (NOT MPI_NUMLIBS EQUAL MPI_NUMLIBS_EXPECTED) - set(MPI_LIBRARIES_WORK "MPI_${lang}_LIBRARIES-NOTFOUND") + # 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() - elseif(try_libs) - # If we didn't have an MPI compiler script to interrogate, attempt to find everything - # with plain old find functions. This is nasty because MPI implementations have LOTS of - # different library names, so this section isn't going to be very generic. We need to - # make sure it works for MS MPI, though, since there are no compiler wrappers for that. - find_path(MPI_HEADER_PATH mpi.h - HINTS ${_MPI_BASE_DIR} ${_MPI_PREFIX_PATH} - PATH_SUFFIXES include Inc) - set(MPI_INCLUDE_PATH_WORK ${MPI_HEADER_PATH}) - - # Decide between 32-bit and 64-bit libraries for Microsoft's MPI - if("${CMAKE_SIZEOF_VOID_P}" EQUAL 8) - set(MS_MPI_ARCH_DIR x64) - set(MS_MPI_ARCH_DIR2 amd64) - else() - set(MS_MPI_ARCH_DIR x86) - set(MS_MPI_ARCH_DIR2 i386) - 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" + ) - set(MPI_LIB "MPI_LIB-NOTFOUND" CACHE FILEPATH "Cleared" FORCE) - find_library(MPI_LIB - NAMES mpi mpich mpich2 msmpi - HINTS ${_MPI_BASE_DIR} ${_MPI_PREFIX_PATH} - PATH_SUFFIXES lib lib/${MS_MPI_ARCH_DIR} Lib Lib/${MS_MPI_ARCH_DIR} lib/${MS_MPI_ARCH_DIR2} Lib/${MS_MPI_ARCH_DIR2}) - set(MPI_LIBRARIES_WORK ${MPI_LIB}) - - # Right now, we only know about the extra libs for C++. - # We could add Fortran here (as there is usually libfmpich, etc.), but - # this really only has to work with MS MPI on Windows. - # Assume that other MPI's are covered by the compiler wrappers. - if (${lang} STREQUAL CXX) - set(MPI_LIB "MPI_LIB-NOTFOUND" CACHE FILEPATH "Cleared" FORCE) - find_library(MPI_LIB - NAMES mpi++ mpicxx cxx mpi_cxx - HINTS ${_MPI_BASE_DIR} ${_MPI_PREFIX_PATH} - PATH_SUFFIXES lib) - if (MPI_LIBRARIES_WORK AND MPI_LIB) - list(APPEND MPI_LIBRARIES_WORK ${MPI_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 ${MPI_MPICH_PREFIX_PATHS}) + mark_as_advanced(MPI_fmpich2_LIBRARY MPI_fmpich2s_LIBRARY MPI_fmpich2g_LIBRARY) + list(APPEND MPI_MPICH_LIB_NAMES "fmpich2") endif() - endif() - if (${lang} STREQUAL Fortran) - set(MPI_HEADER_PATH "MPI_HEADER_PATH-NOTFOUND" CACHE FILEPATH "Cleared" FORCE) - find_path(MPI_HEADER_PATH mpifptr.h - HINTS ${_MPI_BASE_DIR} ${_MPI_PREFIX_PATH} - PATH_SUFFIXES include Include include/${MS_MPI_ARCH_DIR} Include/${MS_MPI_ARCH_DIR2} Include/${MS_MPI_ARCH_DIR} include/${MS_MPI_ARCH_DIR2} Inc Inc/${MS_MPI_ARCH_DIR} Inc/${MS_MPI_ARCH_DIR2}) - if (MPI_INCLUDE_PATH_WORK AND MPI_HEADER_PATH) - list(APPEND MPI_INCLUDE_PATH_WORK ${MPI_HEADER_PATH}) - endif () - - set(MPI_LIB "MPI_LIB-NOTFOUND" CACHE FILEPATH "Cleared" FORCE) - find_library(MPI_LIB - NAMES fmpi fmpich fmpich2 fmpich2g msmpifec msmpifmc - HINTS ${_MPI_BASE_DIR} ${_MPI_PREFIX_PATH} - PATH_SUFFIXES lib lib/${MS_MPI_ARCH_DIR} Lib Lib/${MS_MPI_ARCH_DIR}) - if (MPI_LIBRARIES_WORK AND MPI_LIB) - list(APPEND MPI_LIBRARIES_WORK ${MPI_LIB}) - endif () - endif () - - if (NOT MPI_LIBRARIES_WORK) - set(MPI_LIBRARIES_WORK "MPI_${lang}_LIBRARIES-NOTFOUND") + 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 "${MPI_GUESS_FOUND}" PARENT_SCOPE) +endfunction() - # If we found MPI, set up all of the appropriate cache entries - set(MPI_${lang}_COMPILE_FLAGS ${MPI_COMPILE_FLAGS_WORK} CACHE STRING "MPI ${lang} compilation flags" FORCE) - set(MPI_${lang}_INCLUDE_PATH ${MPI_INCLUDE_PATH_WORK} CACHE STRING "MPI ${lang} include path" FORCE) - set(MPI_${lang}_LINK_FLAGS ${MPI_LINK_FLAGS_WORK} CACHE STRING "MPI ${lang} linking flags" FORCE) - set(MPI_${lang}_LIBRARIES ${MPI_LIBRARIES_WORK} CACHE STRING "MPI ${lang} libraries to link against" FORCE) - mark_as_advanced(MPI_${lang}_COMPILE_FLAGS MPI_${lang}_INCLUDE_PATH MPI_${lang}_LINK_FLAGS MPI_${lang}_LIBRARIES) +function(_MPI_adjust_compile_definitions LANG) + if("${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() - # clear out our temporary lib/header detection variable here. - set(MPI_LIB "MPI_LIB-NOTFOUND" CACHE INTERNAL "Scratch variable for MPI lib detection" FORCE) - set(MPI_HEADER_PATH "MPI_HEADER_PATH-NOTFOUND" CACHE INTERNAL "Scratch variable for MPI header detection" FORCE) +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() - # finally set a found variable for each MPI language - if (MPI_${lang}_INCLUDE_PATH AND MPI_${lang}_LIBRARIES) - set(MPI_${lang}_FOUND TRUE PARENT_SCOPE) - else() - set(MPI_${lang}_FOUND FALSE PARENT_SCOPE) +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}") -# This function attempts to compile with the regular compiler, to see if MPI programs -# work with it. This is a last ditch attempt after we've tried interrogating mpicc and -# friends, and after we've tried to find generic libraries. Works on machines like -# Cray XE6, where the modules environment changes what MPI version cc, CC, and ftn use. -function(try_regular_compiler lang success) - set(scratch_directory ${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}) - if (${lang} STREQUAL Fortran) - set(test_file ${scratch_directory}/cmake_mpi_test.f90) - file(WRITE ${test_file} - "program hello\n" - "include 'mpif.h'\n" - "integer ierror\n" - "call MPI_INIT(ierror)\n" - "call MPI_FINALIZE(ierror)\n" - "end\n") + set_property(TARGET MPI::MPI_${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_ROOT}/Modules/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() - if (${lang} STREQUAL CXX) - set(test_file ${scratch_directory}/cmake_mpi_test.cpp) - else() - set(test_file ${scratch_directory}/cmake_mpi_test.c) - endif() - file(WRITE ${test_file} - "#include <mpi.h>\n" - "int main(int argc, char **argv) {\n" - " MPI_Init(&argc, &argv);\n" - " MPI_Finalize();\n" - "}\n") - endif() - try_compile(compiler_has_mpi ${scratch_directory} ${test_file}) - if (compiler_has_mpi) - set(MPI_${lang}_NO_INTERROGATE ${CMAKE_${lang}_COMPILER} CACHE STRING "Whether to interrogate MPI ${lang} compiler" FORCE) - set(MPI_${lang}_COMPILER ${CMAKE_${lang}_COMPILER} CACHE STRING "MPI ${lang} compiler" FORCE) - set(MPI_${lang}_COMPILE_FLAGS "" CACHE STRING "MPI ${lang} compilation flags" FORCE) - set(MPI_${lang}_INCLUDE_PATH "" CACHE STRING "MPI ${lang} include path" FORCE) - set(MPI_${lang}_LINK_FLAGS "" CACHE STRING "MPI ${lang} linking flags" FORCE) - set(MPI_${lang}_LIBRARIES "" CACHE STRING "MPI ${lang} libraries to link against" FORCE) - endif() - set(${success} ${compiler_has_mpi} PARENT_SCOPE) - unset(compiler_has_mpi CACHE) + try_compile(MPI_RESULT_${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 "${BIN_FILE}") + endif() endfunction() -# End definitions, commence real work here. +macro(_MPI_check_lang_works LANG) + # For Fortran we may have by the MPI-3 standard an implementation that provides: + # - the mpi_f08 module + # - *both*, the mpi module and 'mpif.h' + # Since older MPI standards (MPI-1) did not define anything but 'mpif.h', we need to check all three individually. + if( NOT MPI_${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 distros have some form of mpiexec which gives us something we can reliably look for. -find_program(MPIEXEC - NAMES ${_MPI_EXEC_NAMES} - HINTS ${MPI_HOME} $ENV{MPI_HOME} - PATHS ${_MPI_PREFIX_PATH} - PATH_SUFFIXES bin +# 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}" PATH) +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 come after all flags given to MPIEXEC.") - -# Set the number of processes to the processor count and the previous default -# of 2 if that couldn't be determined. -include(${CMAKE_ROOT}/Modules/ProcessorCount.cmake) -ProcessorCount(_MPIEXEC_NUMPROCS) -if("${_MPIEXEC_NUMPROCS}" EQUAL "0") - set(_MPIEXEC_NUMPROCS 2) -endif() -set(MPIEXEC_MAX_NUMPROCS "${_MPIEXEC_NUMPROCS}" CACHE STRING "Maximum number of processors available to run MPI applications.") -unset(_MPIEXEC_NUMPROCS) -mark_as_advanced(MPIEXEC MPIEXEC_NUMPROC_FLAG MPIEXEC_PREFLAGS MPIEXEC_POSTFLAGS MPIEXEC_MAX_NUMPROCS) +set(MPIEXEC_NUMPROC_FLAG "-n" CACHE STRING "Flag used by MPI to specify the number of processes for mpiexec; the next option will be the number of processes.") +set(MPIEXEC_PREFLAGS "" CACHE STRING "These flags will be directly before the executable that is being run by mpiexec.") +set(MPIEXEC_POSTFLAGS "" CACHE STRING "These flags will be placed after all flags passed to mpiexec.") +# Set the number of processes to the physical processor count +cmake_host_system_information(RESULT _MPIEXEC_NUMPROCS QUERY NUMBER_OF_PHYSICAL_CORES) +set(MPIEXEC_MAX_NUMPROCS "${_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_${lang}_LIBRARIES. +# MPI_LIBRARY and MPI_EXTRA_LIBRARY to respective MPI_${LANG}_LIBRARIES. # # Once we find the new variables, we translate them back into their old # equivalents below. -foreach (lang C CXX) +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}}") + if (NOT MPI_${LANG}_${var} AND MPI_${var}) + set(MPI_${LANG}_${var} "${MPI_${var}}") endif() endforeach() - # Special handling for MPI_LIBRARY and MPI_EXTRA_LIBRARY, which we nixed in the - # new FindMPI. These need to be merged into MPI_<lang>_LIBRARIES - if (NOT MPI_${lang}_LIBRARIES AND (MPI_LIBRARY OR MPI_EXTRA_LIBRARY)) - set(MPI_${lang}_LIBRARIES ${MPI_LIBRARY} ${MPI_EXTRA_LIBRARY}) + # Chop the old compile flags into options and definitions + if(MPI_${LANG}_COMPILE_FLAGS) + unset(MPI_${LANG}_COMPILE_OPTIONS) + unset(MPI_${LANG}_COMPILE_DEFINITIONS) + separate_arguments(MPI_SEPARATE_FLAGS NATIVE_COMMAND "${MPI_${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 C CXX Fortran) - if (CMAKE_${lang}_COMPILER_WORKS) - # If the user supplies a compiler *name* instead of an absolute path, assume that we need to find THAT compiler. - if (MPI_${lang}_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}) - set(MPI_${lang}_COMPILER "MPI_${lang}_COMPILER-NOTFOUND" CACHE FILEPATH "Cleared" FORCE) - endif() - # If the user specifies a compiler, we don't want to try to search libraries either. - set(try_libs FALSE) +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(try_libs TRUE) + 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 ${LANG}" FORCE) + endif() + endif() - find_program(MPI_${lang}_COMPILER - NAMES ${_MPI_${lang}_COMPILER_NAMES} - HINTS ${_MPI_BASE_DIR}/bin - PATHS ${_MPI_PREFIX_PATH} - ) - interrogate_mpi_compiler(${lang} ${try_libs}) - mark_as_advanced(MPI_${lang}_COMPILER) + # 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_${LANG}_COMPILER CACHE) + endif() + # If the user specifies a compiler, we don't want to try to search libraries either. + set(MPI_PINNED_COMPILER TRUE) + else() + set(MPI_PINNED_COMPILER FALSE) + endif() - # last ditch try -- if nothing works so far, just try running the regular compiler and - # see if we can create an MPI executable. - set(regular_compiler_worked 0) - if (NOT MPI_${lang}_LIBRARIES OR NOT MPI_${lang}_INCLUDE_PATH) - try_regular_compiler(${lang} regular_compiler_worked) - 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_${LANG}_WRAPPER_FOUND FALSE) + set(MPI_PINNED_COMPILER FALSE) + endif() - # add fortran mpi module path if ENV VAR exists - set (MPI_${lang}_INCLUDE_PATH "${MPI_${lang}_INCLUDE_PATH};$ENV{MPI_FORTRAN_MOD_DIR}") + if(NOT MPI_${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(${LANG}) + endif() + endif() + endif() - set(MPI_${lang}_FIND_QUIETLY ${MPI_FIND_QUIETLY}) - set(MPI_${lang}_FIND_REQUIRED ${MPI_FIND_REQUIRED}) - set(MPI_${lang}_FIND_VERSION ${MPI_FIND_VERSION}) - set(MPI_${lang}_FIND_VERSION_EXACT ${MPI_FIND_VERSION_EXACT}) + _MPI_split_include_dirs(${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 (regular_compiler_worked) - find_package_handle_standard_args(MPI_${lang} DEFAULT_MSG MPI_${lang}_COMPILER) - else() - find_package_handle_standard_args(MPI_${lang} DEFAULT_MSG MPI_${lang}_LIBRARIES MPI_${lang}_INCLUDE_PATH) + if(NOT MPI_${LANG}_WORKS) + _MPI_check_lang_works(${LANG}) endif() - if(MPI_${lang}_FOUND) - if(NOT TARGET MPI::MPI_${lang}) - add_library(MPI::MPI_${lang} INTERFACE IMPORTED) + # 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() - if(MPI_${lang}_COMPILE_FLAGS) - separate_arguments(_MPI_${lang}_COMPILE_OPTIONS NATIVE_COMMAND "${MPI_${lang}_COMPILE_FLAGS}") - set_property(TARGET MPI::MPI_${lang} PROPERTY - INTERFACE_COMPILE_OPTIONS "${_MPI_${lang}_COMPILE_OPTIONS}") + + unset(MPI_BIN_FOLDER) + + # At this point, we have dealt with determining the MPI version and parameters for each Fortran method available. + # The one remaining issue is to determine which MPI library is installed. + # Determining the version and vendor of the MPI library is only possible via MPI_Get_library_version() at runtime, + # and therefore we cannot do this while cross-compiling (a user may still define MPI_<lang>_LIBRARY_VERSION_STRING + # themselves and we'll attempt splitting it, which is equivalent to provide the try_run output). + # It's also worth noting that the installed version string can depend on the language, or on the system the binary + # runs on if MPI is not statically linked. + if(MPI_DETERMINE_LIBRARY_VERSION AND NOT MPI_${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_${LANG}_LIBRARY_VERSION_STRING "NOTFOUND") + endif() endif() + endif() - unset(_MPI_${lang}_LINK_LINE) - if(MPI_${lang}_LINK_FLAGS) - list(APPEND _MPI_${lang}_LINK_LINE "${MPI_${lang}_LINK_FLAGS}") + 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_${LANG}_WORKS") endif() - list(APPEND _MPI_${lang}_LINK_LINE "${MPI_${lang}_LIBRARIES}") - set_property(TARGET MPI::MPI_${lang} PROPERTY - INTERFACE_LINK_LIBRARIES "${_MPI_${lang}_LINK_LINE}") + endif() + find_package_handle_standard_args(MPI_${LANG} REQUIRED_VARS ${MPI_${LANG}_REQUIRED_VARS} + VERSION_VAR MPI_${LANG}_VERSION) - set_property(TARGET MPI::MPI_${lang} PROPERTY - INTERFACE_INCLUDE_DIRECTORIES "${MPI_${lang}_INCLUDE_PATH}") + 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 -# -# Bare MPI sans ${lang} vars are set to CXX then C, depending on what was found. + +# For compatibility reasons, we also define MPIEXEC +set(MPIEXEC "${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 FOUND COMPILER INCLUDE_PATH COMPILE_FLAGS LINK_FLAGS LIBRARIES) +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}}) @@ -704,28 +1428,26 @@ elseif (MPI_C_FOUND) foreach (var ${_MPI_OLD_VARS}) set(MPI_${var} ${MPI_C_${var}}) endforeach() -else() - # Note that we might still have found Fortran, but you'll need to use MPI_Fortran_FOUND - set(MPI_FOUND FALSE) 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 ${MPI_LIBRARY_WORK} CACHE FILEPATH "MPI library to link against" FORCE) + set(MPI_LIBRARY "${MPI_LIBRARY_WORK}") + unset(MPI_LIBRARY_WORK) else() - set(MPI_LIBRARY "MPI_LIBRARY-NOTFOUND" CACHE FILEPATH "MPI library to link against" FORCE) + set(MPI_LIBRARY "MPI_LIBRARY-NOTFOUND") endif() list(LENGTH MPI_LIBRARIES MPI_NUMLIBS) if (MPI_NUMLIBS GREATER 1) - set(MPI_EXTRA_LIBRARY_WORK ${MPI_LIBRARIES}) + set(MPI_EXTRA_LIBRARY_WORK "${MPI_LIBRARIES}") list(REMOVE_AT MPI_EXTRA_LIBRARY_WORK 0) - set(MPI_EXTRA_LIBRARY ${MPI_EXTRA_LIBRARY_WORK} CACHE STRING "Extra MPI libraries to link against" FORCE) + set(MPI_EXTRA_LIBRARY "${MPI_EXTRA_LIBRARY_WORK}") + unset(MPI_EXTRA_LIBRARY_WORK) else() - set(MPI_EXTRA_LIBRARY "MPI_EXTRA_LIBRARY-NOTFOUND" CACHE STRING "Extra MPI libraries to link against" FORCE) + set(MPI_EXTRA_LIBRARY "MPI_EXTRA_LIBRARY-NOTFOUND") endif() -mark_as_advanced(MPI_LIBRARY MPI_EXTRA_LIBRARY) #============================================================================= # unset these vars to cleanup namespace @@ -733,5 +1455,7 @@ unset(_MPI_OLD_VARS) unset(_MPI_PREFIX_PATH) unset(_MPI_BASE_DIR) foreach (lang C CXX Fortran) - unset(_MPI_${lang}_COMPILER_NAMES) + unset(_MPI_${LANG}_COMPILER_NAMES) endforeach() + +cmake_policy(POP) |