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authorAllen Byrne <byrn@hdfgroup.org>2017-08-31 18:47:31 (GMT)
committerAllen Byrne <byrn@hdfgroup.org>2017-08-31 18:47:31 (GMT)
commit297e70a2ddb2481d4f126fa0821fc73ad8231e2d (patch)
treeae378857b1acfe4951c77a43e2ab6295a0a84765 /config
parent0d94a84ba680a1dbdf2f201a2f5aa0963aeebace (diff)
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HDFFV-9988 Update macro file with changes from CMake master.
Diffstat (limited to 'config')
-rw-r--r--config/cmake_ext_mod/FindMPI.cmake127
1 files changed, 84 insertions, 43 deletions
diff --git a/config/cmake_ext_mod/FindMPI.cmake b/config/cmake_ext_mod/FindMPI.cmake
index 7cd6d46..f566ade 100644
--- a/config/cmake_ext_mod/FindMPI.cmake
+++ b/config/cmake_ext_mod/FindMPI.cmake
@@ -9,71 +9,78 @@
# 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.
+# by the MPI forum) for which many implementations are available.
#
# 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
+# project, where ``<lang>`` is one of C, CXX, or Fortran:
+#
+# ``MPI_<lang>_FOUND``
+# Variable indicating the MPI settings for ``<lang>`` were found.
+# ``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``
+# Include path(s) for MPI header.
+# ``MPI_<lang>_LINK_FLAGS``
+# Linker flags for MPI programs.
+# ``MPI_<lang>_LIBRARIES``
+# All libraries to link MPI programs against.
+#
+# Additionally, the following :prop_tgt:`IMPORTED` targets are defined:
+#
+# ``MPI::MPI_<lang>``
+# Target for using MPI from ``<lang>``.
#
# 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
+# ``MPIEXEC``
+# Executable for running MPI programs, if provided.
+# ``MPIEXEC_NUMPROC_FLAG``
+# Flag to pass to ``MPIEXEC`` before giving it the number of processors to run on.
+# ``MPIEXEC_MAX_NUMPROCS``
+# Number of MPI processors to utilize. Defaults to the number
+# of processors detected on the host system.
+# ``MPIEXEC_PREFLAGS``
+# Flags to pass to ``MPIEXEC`` directly before the executable to run.
+# ``MPIEXEC_POSTFLAGS``
+# Flags to pass to ``MPIEXEC`` after other flags.
#
# 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
+# 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:
#
-# ::
-#
-# 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.
+# 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.
#
# When configuration is successful, ``MPI_<lang>_COMPILER`` will be set to
-# the compiler wrapper for <lang>, if it was found. ``MPI_<lang>_FOUND``
+# 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.
+# 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} ${MPIEXEC_NUMPROC_FLAG} ${MPIEXEC_MAX_NUMPROCS}
# ${MPIEXEC_PREFLAGS} EXECUTABLE ${MPIEXEC_POSTFLAGS} ARGS
#
-# where ``PROCS`` is the number of processors on which to execute the
-# program, ``EXECUTABLE`` is the MPI program, and ``ARGS`` are the arguments to
+# where ``EXECUTABLE`` is the MPI program, and ``ARGS`` are the arguments to
# pass to the MPI program.
#
# Backward Compatibility
@@ -101,12 +108,12 @@ include(GetPrerequisites)
# The compilers are detected in this order:
#
# 1. Try to find the most generic available MPI compiler, as this is usually set up by
-# cluster admins. e.g., if plain old mpicc is available, we'll use it and assume it's
+# cluster admins, e.g. if plain old mpicc is available, we'll use it and assume it's
# the right compiler.
#
# 2. If a generic mpicc is NOT found, then we attempt to find one that matches
# CMAKE_<lang>_COMPILER_ID. e.g. if you are using XL compilers, we'll try to find mpixlc
-# and company, but not mpiicc. This hopefully prevents toolchain mismatches.
+# and company, but not mpiicc. This hopefully prevents toolchain mismatches.
#
# If you want to force a particular MPI compiler other than what we autodetect (e.g. if you
# want to compile regular stuff with GNU and parallel stuff with Intel), you can always set
@@ -498,7 +505,7 @@ function (interrogate_mpi_compiler lang try_libs)
set(MPI_${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_${lang}_LIBRARIES)
- # clear out our temporary lib/header detectionv variable here.
+ # clear out our temporary lib/header detection variable here.
set(MPI_LIB "MPI_LIB-NOTFOUND" CACHE INTERNAL "Scratch variable for MPI lib detection" FORCE)
set(MPI_HEADER_PATH "MPI_HEADER_PATH-NOTFOUND" CACHE INTERNAL "Scratch variable for MPI header detection" FORCE)
endif()
@@ -568,10 +575,21 @@ find_program(MPIEXEC
get_filename_component(_MPI_BASE_DIR "${MPIEXEC}" PATH)
get_filename_component(_MPI_BASE_DIR "${_MPI_BASE_DIR}" PATH)
-set(MPIEXEC_NUMPROC_FLAG "-np" CACHE STRING "Flag used by MPI to specify the number of processes for MPIEXEC; the next option will be the number of processes.")
+# According to the MPI standard, section 8.8 -n is a guaranteed, and the only guaranteed way to
+# launch an MPI process using mpiexec if such a program exists.
+set(MPIEXEC_NUMPROC_FLAG "-n" CACHE STRING "Flag used by MPI to specify the number of processes for MPIEXEC; the next option will be the number of processes.")
set(MPIEXEC_PREFLAGS "" CACHE STRING "These flags will be directly before the executable that is being run by MPIEXEC.")
set(MPIEXEC_POSTFLAGS "" CACHE STRING "These flags will come after all flags given to MPIEXEC.")
-set(MPIEXEC_MAX_NUMPROCS "2" CACHE STRING "Maximum number of processors available to run MPI applications.")
+
+# Set the number of processes to the processor count and the previous default
+# of 2 if that couldn't be determined.
+include(${CMAKE_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)
@@ -646,6 +664,28 @@ foreach (lang C CXX Fortran)
else()
find_package_handle_standard_args(MPI_${lang} DEFAULT_MSG MPI_${lang}_LIBRARIES MPI_${lang}_INCLUDE_PATH)
endif()
+
+ if(MPI_${lang}_FOUND)
+ if(NOT TARGET MPI::MPI_${lang})
+ add_library(MPI::MPI_${lang} INTERFACE IMPORTED)
+ 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_${lang}_COMPILE_OPTIONS}")
+ endif()
+
+ unset(_MPI_${lang}_LINK_LINE)
+ if(MPI_${lang}_LINK_FLAGS)
+ list(APPEND _MPI_${lang}_LINK_LINE "${MPI_${lang}_LINK_FLAGS}")
+ endif()
+ list(APPEND _MPI_${lang}_LINK_LINE "${MPI_${lang}_LIBRARIES}")
+ set_property(TARGET MPI::MPI_${lang} PROPERTY
+ INTERFACE_LINK_LIBRARIES "${_MPI_${lang}_LINK_LINE}")
+
+ set_property(TARGET MPI::MPI_${lang} PROPERTY
+ INTERFACE_INCLUDE_DIRECTORIES "${MPI_${lang}_INCLUDE_PATH}")
+ endif()
endif()
endforeach()
@@ -685,6 +725,7 @@ if (MPI_NUMLIBS GREATER 1)
else()
set(MPI_EXTRA_LIBRARY "MPI_EXTRA_LIBRARY-NOTFOUND" CACHE STRING "Extra MPI libraries to link against" FORCE)
endif()
+mark_as_advanced(MPI_LIBRARY MPI_EXTRA_LIBRARY)
#=============================================================================
# unset these vars to cleanup namespace