Current Path :
/
proc
/
self
/
root
/
usr
/
share
/
cmake
/
Modules
/
Or
Select Your Path :
Upload File :
New :
File
Dir
//proc/self/root/usr/share/cmake/Modules/FindMPI.cmake
# - 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 ${MPIEXEC_POSTFLAGS} ARGS # where PROCS is the number of processors on which to execute the program, # EXECUTABLE is the MPI program, and ARGS are the arguments to pass to the # MPI program. # # === Backward Compatibility === # # For backward compatibility with older versions of FindMPI, these # variables are set, but deprecated: # MPI_FOUND MPI_COMPILER MPI_LIBRARY # MPI_COMPILE_FLAGS MPI_INCLUDE_PATH MPI_EXTRA_LIBRARY # MPI_LINK_FLAGS MPI_LIBRARIES # In new projects, please use the MPI_<lang>_XXX equivalents. #============================================================================= # Copyright 2001-2011 Kitware, Inc. # Copyright 2010-2011 Todd Gamblin tgamblin@llnl.gov # Copyright 2001-2009 Dave Partyka # # Distributed under the OSI-approved BSD License (the "License"); # see accompanying file Copyright.txt for details. # # This software is distributed WITHOUT ANY WARRANTY; without even the # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. # See the License for more information. #============================================================================= # (To distribute this file outside of CMake, substitute the full # License text for the above reference.) # include this to handle the QUIETLY and REQUIRED arguments include(${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}_${lang}_COMPILER_NAMES) # clean up the namespace here endforeach() endforeach() # Names to try for MPI exec set(_MPI_EXEC_NAMES mpiexec mpirun lamexec srun) # Grab the path to MPI from the registry if we're on windows. set(_MPI_PREFIX_PATH) if(WIN32) list(APPEND _MPI_PREFIX_PATH "[HKEY_LOCAL_MACHINE\\SOFTWARE\\MPICH\\SMPD;binary]/..") list(APPEND _MPI_PREFIX_PATH "[HKEY_LOCAL_MACHINE\\SOFTWARE\\MPICH2;Path]") list(APPEND _MPI_PREFIX_PATH "$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() # # 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. execute_process( COMMAND ${MPI_${lang}_COMPILER} -showme:compile OUTPUT_VARIABLE MPI_COMPILE_CMDLINE OUTPUT_STRIP_TRAILING_WHITESPACE ERROR_VARIABLE MPI_COMPILE_CMDLINE ERROR_STRIP_TRAILING_WHITESPACE RESULT_VARIABLE 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) execute_process( COMMAND ${MPI_${lang}_COMPILER} -showme OUTPUT_VARIABLE MPI_COMPILE_CMDLINE OUTPUT_STRIP_TRAILING_WHITESPACE ERROR_VARIABLE MPI_COMPILE_CMDLINE ERROR_STRIP_TRAILING_WHITESPACE RESULT_VARIABLE MPI_COMPILER_RETURN) endif() # MVAPICH uses -compile-info and -link-info. Try them. if (NOT MPI_COMPILER_RETURN EQUAL 0) execute_process( COMMAND ${MPI_${lang}_COMPILER} -compile-info OUTPUT_VARIABLE MPI_COMPILE_CMDLINE OUTPUT_STRIP_TRAILING_WHITESPACE ERROR_VARIABLE MPI_COMPILE_CMDLINE ERROR_STRIP_TRAILING_WHITESPACE RESULT_VARIABLE 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) execute_process( COMMAND ${MPI_${lang}_COMPILER} -show OUTPUT_VARIABLE MPI_COMPILE_CMDLINE OUTPUT_STRIP_TRAILING_WHITESPACE ERROR_VARIABLE MPI_COMPILE_CMDLINE ERROR_STRIP_TRAILING_WHITESPACE RESULT_VARIABLE 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(REGEX 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(REGEX 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 ${MPI_LIBDIRS}) separate_arguments(MPI_LINK_PATH) endif() # Extract linker flags from the link command line string(REGEX MATCHALL "(^| )-Wl,([^\" ]+|\"[^\"]+\")" MPI_ALL_LINK_FLAGS "${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. Do this for C++ and C # compilers if the implicit link directories are defined. if (DEFINED CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES) set(MPI_LINK_PATH "${MPI_LINK_PATH};${CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES}") endif () if (DEFINED CMAKE_C_IMPLICIT_LINK_DIRECTORIES) set(MPI_LINK_PATH "${MPI_LINK_PATH};${CMAKE_C_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 amd64) else() set(MS_MPI_ARCH_DIR 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}) 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} 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} PATHS "${MPI_HOME}/bin" "$ENV{MPI_HOME}/bin" ${_MPI_PREFIX_PATH}) interrogate_mpi_compiler(${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()
