| #.rst: |
| # FindMPI |
| # ------- |
| # |
| # Find a Message Passing Interface (MPI) implementation |
| # |
| # The Message Passing Interface (MPI) is a library used to write |
| # high-performance distributed-memory parallel applications, and is |
| # typically deployed on a cluster. MPI is a standard interface (defined |
| # by the MPI forum) for which many implementations are available. All |
| # of them have somewhat different include paths, libraries to link |
| # against, etc., and this module tries to smooth out those differences. |
| # |
| # === Variables === |
| # |
| # This module will set the following variables per language in your |
| # project, where <lang> is one of C, CXX, or Fortran: |
| # |
| # :: |
| # |
| # MPI_<lang>_FOUND TRUE if FindMPI found MPI flags for <lang> |
| # MPI_<lang>_COMPILER MPI Compiler wrapper for <lang> |
| # MPI_<lang>_COMPILE_FLAGS Compilation flags for MPI programs |
| # MPI_<lang>_INCLUDE_PATH Include path(s) for MPI header |
| # MPI_<lang>_LINK_FLAGS Linking flags for MPI programs |
| # MPI_<lang>_LIBRARIES All libraries to link MPI programs against |
| # |
| # Additionally, FindMPI sets the following variables for running MPI |
| # programs from the command line: |
| # |
| # :: |
| # |
| # MPIEXEC Executable for running MPI programs |
| # MPIEXEC_NUMPROC_FLAG Flag to pass to MPIEXEC before giving |
| # it the number of processors to run on |
| # MPIEXEC_PREFLAGS Flags to pass to MPIEXEC directly |
| # before the executable to run. |
| # MPIEXEC_POSTFLAGS Flags to pass to MPIEXEC after other flags |
| # |
| # === Usage === |
| # |
| # To use this module, simply call FindMPI from a CMakeLists.txt file, or |
| # run find_package(MPI), then run CMake. If you are happy with the |
| # auto- detected configuration for your language, then you're done. If |
| # not, you have two options: |
| # |
| # :: |
| # |
| # 1. Set MPI_<lang>_COMPILER to the MPI wrapper (mpicc, etc.) 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. |
| # |
| # 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. |
| # |
| # When using MPIEXEC to execute MPI applications, you should typically |
| # use all of the MPIEXEC flags as follows: |
| # |
| # :: |
| # |
| # ${MPIEXEC} ${MPIEXEC_NUMPROC_FLAG} PROCS |
| # ${MPIEXEC_PREFLAGS} EXECUTABLE ${MPIEXEC_POSTFLAGS} ARGS |
| # |
| # where PROCS is the number of processors on which to execute the |
| # program, EXECUTABLE is the MPI program, and ARGS are the arguments to |
| # pass to the MPI program. |
| # |
| # === Backward Compatibility === |
| # |
| # For backward compatibility with older versions of FindMPI, these |
| # variables are set, but deprecated: |
| # |
| # :: |
| # |
| # MPI_FOUND MPI_COMPILER MPI_LIBRARY |
| # MPI_COMPILE_FLAGS MPI_INCLUDE_PATH MPI_EXTRA_LIBRARY |
| # MPI_LINK_FLAGS MPI_LIBRARIES |
| # |
| # In new projects, please use the MPI_<lang>_XXX equivalents. |
| |
| #============================================================================= |
| # Copyright 2001-2011 Kitware, Inc. |
| # Copyright 2010-2011 Todd Gamblin [email protected] |
| # Copyright 2001-2009 Dave Partyka |
| # |
| # Distributed under the OSI-approved BSD License (the "License"); |
| # see accompanying file Copyright.txt for details. |
| # |
| # This software is distributed WITHOUT ANY WARRANTY; without even the |
| # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| # See the License for more information. |
| #============================================================================= |
| # (To distribute this file outside of CMake, substitute the full |
| # License text for the above reference.) |
| |
| # include this to handle the QUIETLY and REQUIRED arguments |
| include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake) |
| include(${CMAKE_CURRENT_LIST_DIR}/GetPrerequisites.cmake) |
| |
| # |
| # 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) |
| set(_MPI_CXX_COMPILER_NAMES mpicxx mpiCC mpcxx mpCC mpic++ mpc++ |
| mpicxx_r mpiCC_r mpcxx_r mpCC_r mpic++_r mpc++_r) |
| set(_MPI_Fortran_COMPILER_NAMES mpif95 mpif95_r mpf95 mpf95_r |
| mpif90 mpif90_r mpf90 mpf90_r |
| mpif77 mpif77_r mpf77 mpf77_r) |
| |
| # 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_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) |
| set(_MPI_Intel_CXX_COMPILER_NAMES mpiicpc mpiicxx mpiic++ mpiiCC) |
| set(_MPI_Intel_Fortran_COMPILER_NAMES mpiifort mpiif95 mpiif90 mpiif77) |
| |
| # PGI compiler names |
| set(_MPI_PGI_C_COMPILER_NAMES mpipgcc mppgcc) |
| set(_MPI_PGI_CXX_COMPILER_NAMES mpipgCC mppgCC) |
| set(_MPI_PGI_Fortran_COMPILER_NAMES mpipgf95 mpipgf90 mppgf95 mppgf90 mpipgf77 mppgf77) |
| |
| # XLC MPI Compiler names |
| set(_MPI_XL_C_COMPILER_NAMES mpxlc mpxlc_r mpixlc mpixlc_r) |
| set(_MPI_XL_CXX_COMPILER_NAMES mpixlcxx mpixlC mpixlc++ mpxlcxx mpxlc++ mpixlc++ mpxlCC |
| mpixlcxx_r mpixlC_r mpixlc++_r mpxlcxx_r mpxlc++_r mpixlc++_r mpxlCC_r) |
| set(_MPI_XL_Fortran_COMPILER_NAMES mpixlf95 mpixlf95_r mpxlf95 mpxlf95_r |
| mpixlf90 mpixlf90_r mpxlf90 mpxlf90_r |
| mpixlf77 mpixlf77_r mpxlf77 mpxlf77_r |
| mpixlf mpixlf_r mpxlf mpxlf_r) |
| |
| # 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}_${lang}_COMPILER_NAMES}) |
| endif() |
| unset(_MPI_${id}_${lang}_COMPILER_NAMES) # clean up the namespace here |
| endforeach() |
| endforeach() |
| |
| |
| # Names to try for MPI exec |
| set(_MPI_EXEC_NAMES mpiexec mpirun lamexec srun) |
| |
| # Grab the path to MPI from the registry if we're on windows. |
| set(_MPI_PREFIX_PATH) |
| if(WIN32) |
| # MSMPI |
| file(TO_CMAKE_PATH "$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/") |
| 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() |
| endforeach() |
| |
| function (_mpi_check_compiler compiler options cmdvar resvar) |
| 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") |
| set(success 255 ) |
| endif() |
| set(${cmdvar} "${cmdline}" PARENT_SCOPE) |
| set(${resvar} "${success}" 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) |
| |
| else() |
| # reset things here if something went wrong. |
| set(MPI_COMPILE_CMDLINE) |
| set(MPI_LINK_CMDLINE) |
| endif() |
| endif () |
| |
| # 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) |
| 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() |
| |
| # 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() |
| |
| # 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 (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() |
| else() |
| message(STATUS "Unable to determine MPI from MPI driver ${MPI_${lang}_COMPILER}") |
| set(MPI_COMPILE_CMDLINE) |
| set(MPI_LINK_CMDLINE) |
| endif() |
| |
| # 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) |
| |
| foreach(FLAG ${MPI_ALL_COMPILE_FLAGS}) |
| if (MPI_COMPILE_FLAGS_WORK) |
| set(MPI_COMPILE_FLAGS_WORK "${MPI_COMPILE_FLAGS_WORK} ${FLAG}") |
| else() |
| set(MPI_COMPILE_FLAGS_WORK ${FLAG}) |
| endif() |
| endforeach() |
| |
| # Extract include paths from compile command line |
| string(REGEX MATCHALL "(^| )-I([^\" ]+|\"[^\"]+\")" MPI_ALL_INCLUDE_PATHS "${MPI_COMPILE_CMDLINE}") |
| foreach(IPATH ${MPI_ALL_INCLUDE_PATHS}) |
| string(REGEX REPLACE "^ ?-I" "" IPATH ${IPATH}) |
| string(REPLACE "//" "/" IPATH ${IPATH}) |
| list(APPEND MPI_INCLUDE_PATH_WORK ${IPATH}) |
| endforeach() |
| |
| # 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() |
| |
| # 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 ${MPI_HEADER_PATH}) |
| endif() |
| |
| # Extract linker paths from the link command line |
| string(REGEX MATCHALL "(^| |-Wl,)-L([^\" ]+|\"[^\"]+\")" MPI_ALL_LINK_PATHS "${MPI_LINK_CMDLINE}") |
| set(MPI_LINK_PATH) |
| foreach(LPATH ${MPI_ALL_LINK_PATHS}) |
| string(REGEX REPLACE "^(| |-Wl,)-L" "" LPATH ${LPATH}) |
| string(REPLACE "//" "/" LPATH ${LPATH}) |
| list(APPEND MPI_LINK_PATH ${LPATH}) |
| endforeach() |
| |
| # try using showme:libdirs if extracting didn't work. |
| if (NOT MPI_LINK_PATH) |
| set(MPI_LINK_PATH ${MPI_LIBDIRS}) |
| separate_arguments(MPI_LINK_PATH) |
| endif() |
| |
| # Extract linker flags from the link command line |
| string(REGEX MATCHALL "(^| )(-Wl,|-Xlinker )([^\" ]+|\"[^\"]+\")" MPI_ALL_LINK_FLAGS "${MPI_LINK_CMDLINE}") |
| set(MPI_LINK_FLAGS_WORK) |
| foreach(FLAG ${MPI_ALL_LINK_FLAGS}) |
| if (MPI_LINK_FLAGS_WORK) |
| set(MPI_LINK_FLAGS_WORK "${MPI_LINK_FLAGS_WORK} ${FLAG}") |
| else() |
| set(MPI_LINK_FLAGS_WORK ${FLAG}) |
| endif() |
| endforeach() |
| |
| # Extract the set of libraries to link against from the link command |
| # line |
| string(REGEX MATCHALL "(^| )-l([^\" ]+|\"[^\"]+\")" MPI_LIBNAMES "${MPI_LINK_CMDLINE}") |
| |
| # 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}) |
| # 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 ${LIB}") |
| endif() |
| endforeach() |
| |
| # Sanity check MPI_LIBRARIES to make sure there are enough libraries |
| list(LENGTH MPI_LIBRARIES_WORK MPI_NUMLIBS) |
| list(LENGTH MPI_LIBNAMES MPI_NUMLIBS_EXPECTED) |
| if (NOT MPI_NUMLIBS EQUAL MPI_NUMLIBS_EXPECTED) |
| set(MPI_LIBRARIES_WORK "MPI_${lang}_LIBRARIES-NOTFOUND") |
| 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() |
| |
| 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}) |
| 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 ${MPI_LIB}) |
| endif() |
| endif() |
| |
| if (NOT MPI_LIBRARIES_WORK) |
| set(MPI_LIBRARIES_WORK "MPI_${lang}_LIBRARIES-NOTFOUND") |
| endif() |
| endif() |
| |
| # 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_${lang}_LIBRARIES) |
| |
| # clear out our temporary lib/header detectionv variable here. |
| set(MPI_LIB "MPI_LIB-NOTFOUND" CACHE INTERNAL "Scratch variable for MPI lib detection" FORCE) |
| set(MPI_HEADER_PATH "MPI_HEADER_PATH-NOTFOUND" CACHE INTERNAL "Scratch variable for MPI header detection" FORCE) |
| endif() |
| |
| # finally set a found variable for each MPI language |
| if (MPI_${lang}_INCLUDE_PATH AND MPI_${lang}_LIBRARIES) |
| set(MPI_${lang}_FOUND TRUE PARENT_SCOPE) |
| else() |
| set(MPI_${lang}_FOUND FALSE PARENT_SCOPE) |
| endif() |
| endfunction() |
| |
| |
| # 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 ${test_file} |
| "program hello\n" |
| "include 'mpif.h'\n" |
| "integer ierror\n" |
| "call MPI_INIT(ierror)\n" |
| "call MPI_FINALIZE(ierror)\n" |
| "end\n") |
| else() |
| if (${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) |
| endfunction() |
| |
| # End definitions, commence real work here. |
| |
| # 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 ${_MPI_PREFIX_PATH} |
| PATH_SUFFIXES bin |
| DOC "Executable for running MPI programs.") |
| |
| # call get_filename_component twice to remove mpiexec and the directory it exists in (typically bin). |
| # This gives us a fairly reliable base directory to search for /bin /lib and /include from. |
| get_filename_component(_MPI_BASE_DIR "${MPIEXEC}" PATH) |
| get_filename_component(_MPI_BASE_DIR "${_MPI_BASE_DIR}" PATH) |
| |
| set(MPIEXEC_NUMPROC_FLAG "-np" CACHE STRING "Flag used by MPI to specify the number of processes for MPIEXEC; the next option will be the number of processes.") |
| set(MPIEXEC_PREFLAGS "" CACHE STRING "These flags will be directly before the executable that is being run by MPIEXEC.") |
| set(MPIEXEC_POSTFLAGS "" CACHE STRING "These flags will come after all flags given to MPIEXEC.") |
| set(MPIEXEC_MAX_NUMPROCS "2" CACHE STRING "Maximum number of processors available to run MPI applications.") |
| mark_as_advanced(MPIEXEC MPIEXEC_NUMPROC_FLAG MPIEXEC_PREFLAGS MPIEXEC_POSTFLAGS MPIEXEC_MAX_NUMPROCS) |
| |
| |
| #============================================================================= |
| # Backward compatibility input hacks. Propagate the FindMPI hints to C and |
| # CXX if the respective new versions are not defined. Translate the old |
| # MPI_LIBRARY and MPI_EXTRA_LIBRARY to respective MPI_${lang}_LIBRARIES. |
| # |
| # Once we find the new variables, we translate them back into their old |
| # equivalents below. |
| foreach (lang C CXX) |
| # Old input variables. |
| set(_MPI_OLD_INPUT_VARS COMPILER COMPILE_FLAGS INCLUDE_PATH LINK_FLAGS) |
| |
| # Set new vars based on their old equivalents, if the new versions are not already set. |
| foreach (var ${_MPI_OLD_INPUT_VARS}) |
| if (NOT MPI_${lang}_${var} AND MPI_${var}) |
| set(MPI_${lang}_${var} "${MPI_${var}}") |
| endif() |
| endforeach() |
| |
| # 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} ${MPI_EXTRA_LIBRARY}) |
| endif() |
| endforeach() |
| #============================================================================= |
| |
| |
| # This loop finds the compilers and sends them off for interrogation. |
| foreach (lang C CXX Fortran) |
| if (CMAKE_${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_${lang}_COMPILER) |
| is_file_executable(MPI_${lang}_COMPILER MPI_COMPILER_IS_EXECUTABLE) |
| if (NOT MPI_COMPILER_IS_EXECUTABLE) |
| # 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) |
| # If the user specifies a compiler, we don't want to try to search libraries either. |
| set(try_libs FALSE) |
| endif() |
| else() |
| set(try_libs TRUE) |
| 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) |
| |
| # 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(${lang} regular_compiler_worked) |
| endif() |
| |
| set(MPI_${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 ${MPI_FIND_VERSION_EXACT}) |
| |
| if (regular_compiler_worked) |
| find_package_handle_standard_args(MPI_${lang} DEFAULT_MSG MPI_${lang}_COMPILER) |
| else() |
| find_package_handle_standard_args(MPI_${lang} DEFAULT_MSG MPI_${lang}_LIBRARIES MPI_${lang}_INCLUDE_PATH) |
| endif() |
| endif() |
| endforeach() |
| |
| |
| #============================================================================= |
| # More backward compatibility stuff |
| # |
| # 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) |
| if (MPI_CXX_FOUND) |
| foreach (var ${_MPI_OLD_VARS}) |
| set(MPI_${var} ${MPI_CXX_${var}}) |
| endforeach() |
| elseif (MPI_C_FOUND) |
| foreach (var ${_MPI_OLD_VARS}) |
| set(MPI_${var} ${MPI_C_${var}}) |
| endforeach() |
| 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) |
| else() |
| set(MPI_LIBRARY "MPI_LIBRARY-NOTFOUND" CACHE FILEPATH "MPI library to link against" FORCE) |
| endif() |
| |
| list(LENGTH MPI_LIBRARIES MPI_NUMLIBS) |
| if (MPI_NUMLIBS GREATER 1) |
| set(MPI_EXTRA_LIBRARY_WORK ${MPI_LIBRARIES}) |
| list(REMOVE_AT MPI_EXTRA_LIBRARY_WORK 0) |
| set(MPI_EXTRA_LIBRARY ${MPI_EXTRA_LIBRARY_WORK} CACHE STRING "Extra MPI libraries to link against" FORCE) |
| else() |
| set(MPI_EXTRA_LIBRARY "MPI_EXTRA_LIBRARY-NOTFOUND" CACHE STRING "Extra MPI libraries to link against" FORCE) |
| endif() |
| #============================================================================= |
| |
| # unset these vars to cleanup namespace |
| unset(_MPI_OLD_VARS) |
| unset(_MPI_PREFIX_PATH) |
| unset(_MPI_BASE_DIR) |
| foreach (lang C CXX Fortran) |
| unset(_MPI_${lang}_COMPILER_NAMES) |
| endforeach() |
