Imported Upstream version 3.10.1upstream/3.10.1

8 files changed, 249 insertions, 129 deletions

diff --git a/Modules/CMakeDetermineCompilerId.cmake b/Modules/CMakeDetermineCompilerId.cmake
index 347106e78..15c304c1e 100644
--- a/Modules/CMakeDetermineCompilerId.cmake
+++ b/Modules/CMakeDetermineCompilerId.cmake
@@ -742,12 +742,12 @@ function(CMAKE_DIAGNOSE_UNSUPPORTED_CLANG lang envvar)
     return()
   endif()
 
-  # Test whether a GNU-like command-line option works.
-  execute_process(COMMAND "${CMAKE_${lang}_COMPILER}" --version
+  # Test whether an MSVC-like command-line option works.
+  execute_process(COMMAND "${CMAKE_${lang}_COMPILER}" /?
     RESULT_VARIABLE _clang_result
     OUTPUT_VARIABLE _clang_stdout
     ERROR_VARIABLE _clang_stderr)
-  if(NOT _clang_result EQUAL 0)
+  if(_clang_result EQUAL 0)
     return()
   endif()
 
diff --git a/Modules/Compiler/IAR-FindBinUtils.cmake b/Modules/Compiler/IAR-FindBinUtils.cmake
index 2b0479507..d662f5615 100644
--- a/Modules/Compiler/IAR-FindBinUtils.cmake
+++ b/Modules/Compiler/IAR-FindBinUtils.cmake
@@ -10,7 +10,7 @@ get_filename_component(__iar_hint_2 "${CMAKE_${_CMAKE_PROCESSING_LANGUAGE}_COMPI
 
 set(__iar_hints "${__iar_hint_1}" "${__iar_hint_2}")
 
-if("${CMAKE_C_COMPILER_ARCHITECTURE_ID}" STREQUAL "ARM")
+if("${CMAKE_${_CMAKE_PROCESSING_LANGUAGE}_COMPILER_ARCHITECTURE_ID}" STREQUAL "ARM")
   # could allow using normal binutils ar, since objects are normal ELF files?
   find_program(CMAKE_IAR_LINKARM ilinkarm.exe HINTS ${__iar_hints}
       DOC "The IAR ARM linker")
@@ -38,7 +38,7 @@ set(CMAKE_IAR_LINKARM \"${CMAKE_IAR_LINKARM}\")
 ")
 
 
-elseif("${CMAKE_C_COMPILER_ARCHITECTURE_ID}" STREQUAL "AVR")
+elseif("${CMAKE_${_CMAKE_PROCESSING_LANGUAGE}_COMPILER_ARCHITECTURE_ID}" STREQUAL "AVR")
 
   # For AVR and AVR32, IAR uses the "xlink" linker and the "xar" archiver:
   find_program(CMAKE_IAR_LINKER xlink.exe HINTS ${__iar_hints}
diff --git a/Modules/FindMPI.cmake b/Modules/FindMPI.cmake
index 7f4c44c5e..22493f69b 100644
--- a/Modules/FindMPI.cmake
+++ b/Modules/FindMPI.cmake
@@ -614,6 +614,16 @@ function (_MPI_interrogate_compiler lang)
     endif()
   endif()
 
+  if(MPI_${LANG}_EXTRA_COMPILE_DEFINITIONS)
+    list(APPEND MPI_COMPILE_DEFINITIONS_WORK "${MPI_${LANG}_EXTRA_COMPILE_DEFINITIONS}")
+  endif()
+  if(MPI_${LANG}_EXTRA_COMPILE_OPTIONS)
+    list(APPEND MPI_COMPILE_OPTIONS_WORK "${MPI_${LANG}_EXTRA_COMPILE_OPTIONS}")
+  endif()
+  if(MPI_${LANG}_EXTRA_LIB_NAMES)
+    list(APPEND MPI_PLAIN_LIB_NAMES_WORK "${MPI_${LANG}_EXTRA_LIB_NAMES}")
+  endif()
+
   # If we found MPI, set up all of the appropriate cache entries
   if(NOT MPI_${LANG}_COMPILE_OPTIONS)
     set(MPI_${LANG}_COMPILE_OPTIONS          ${MPI_COMPILE_OPTIONS_WORK}     CACHE STRING "MPI ${LANG} compilation options"            FORCE)
@@ -822,33 +832,43 @@ 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()
+  # Only for libraries do we need to check whether the compiler's linking stage is separate.
+  if(NOT "${MPI_${LANG}_COMPILER}" STREQUAL "${CMAKE_${LANG}_COMPILER}" OR NOT MPI_${LANG}_WORKS_IMPLICIT)
+    foreach(mpilib IN LISTS MPI_${LANG}_LIB_NAMES)
+      list(APPEND MPI_${LANG}_LIBRARIES ${MPI_${mpilib}_LIBRARY})
+    endforeach()
+  endif()
 endmacro()
 
 macro(_MPI_assemble_include_dirs LANG)
-  set(MPI_${LANG}_INCLUDE_DIRS "${MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS}")
-  if("${LANG}" MATCHES "(C|CXX)")
-    if(MPI_${LANG}_HEADER_DIR)
-      list(APPEND MPI_${LANG}_INCLUDE_DIRS "${MPI_${LANG}_HEADER_DIR}")
-    endif()
-  else() # Fortran
-    if(MPI_${LANG}_F77_HEADER_DIR)
-      list(APPEND MPI_${LANG}_INCLUDE_DIRS "${MPI_${LANG}_F77_HEADER_DIR}")
+  if("${MPI_${LANG}_COMPILER}" STREQUAL "${CMAKE_${LANG}_COMPILER}")
+    set(MPI_${LANG}_INCLUDE_DIRS "")
+  else()
+    set(MPI_${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_${LANG}_MODULE_DIR AND NOT "${MPI_${LANG}_MODULE_DIR}" IN_LIST MPI_${LANG}_INCLUDE_DIRS)
-      list(APPEND MPI_${LANG}_INCLUDE_DIRS "${MPI_${LANG}_MODULE_DIR}")
+    if(MPI_${LANG}_ADDITIONAL_INCLUDE_VARS)
+      foreach(MPI_ADDITIONAL_INC_DIR IN LISTS MPI_${LANG}_ADDITIONAL_INCLUDE_VARS)
+        list(APPEND MPI_${LANG}_INCLUDE_DIRS "${MPI_${MPI_ADDITIONAL_INC_DIR}_INCLUDE_DIR}")
+      endforeach()
     endif()
   endif()
-  if(MPI_${LANG}_ADDITIONAL_INCLUDE_VARS)
-    foreach(mpiadditionalinclude IN LISTS MPI_${LANG}_ADDITIONAL_INCLUDE_VARS)
-      list(APPEND MPI_${LANG}_INCLUDE_DIRS "${MPI_${mpiadditionalinclude}_INCLUDE_DIR}")
-    endforeach()
-  endif()
 endmacro()
 
 function(_MPI_split_include_dirs LANG)
+  if("${MPI_${LANG}_COMPILER}" STREQUAL "${CMAKE_${LANG}_COMPILER}")
+    return()
+  endif()
   # Backwards compatibility: Search INCLUDE_PATH if given.
   if(MPI_${LANG}_INCLUDE_PATH)
     list(APPEND MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS "${MPI_${LANG}_INCLUDE_PATH}")
@@ -884,6 +904,13 @@ function(_MPI_split_include_dirs LANG)
     endif()
     mark_as_advanced(MPI_${LANG}_F77_HEADER_DIR MPI_${LANG}_MODULE_DIR)
   endif()
+  # Remove duplicates and default system directories from the list.
+  if(MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS)
+    list(REMOVE_DUPLICATES MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS)
+    foreach(MPI_IMPLICIT_INC_DIR IN LISTS CMAKE_${LANG}_IMPLICIT_LINK_DIRECTORIES)
+      list(REMOVE_ITEM MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS ${MPI_IMPLICIT_INC_DIR})
+    endforeach()
+  endif()
   set(MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS ${MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS} CACHE STRING "MPI ${LANG} additional include directories" FORCE)
 endfunction()
 
@@ -1013,7 +1040,7 @@ elseif("${CMAKE_HOST_SYSTEM_NAME}" STREQUAL "Windows")
 elseif("${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/")
+  MPI_search_mpi_prefix_folder("/usr/local/mpi")
 endif()
 
 # Most MPI distributions have some form of mpiexec or mpirun which gives us something we can look for.
@@ -1049,48 +1076,54 @@ mark_as_advanced(MPIEXEC_EXECUTABLE MPIEXEC_NUMPROC_FLAG MPIEXEC_PREFLAGS MPIEXE
 #
 # Once we find the new variables, we translate them back into their old
 # equivalents below.
-foreach (LANG IN ITEMS C CXX)
-  # Old input variables.
-  set(_MPI_OLD_INPUT_VARS COMPILER COMPILE_FLAGS INCLUDE_PATH LINK_FLAGS)
-
-  # Set new vars based on their old equivalents, if the new versions are not already set.
-  foreach (var ${_MPI_OLD_INPUT_VARS})
-    if (NOT MPI_${LANG}_${var} AND MPI_${var})
-      set(MPI_${LANG}_${var} "${MPI_${var}}")
-    endif()
-  endforeach()
-
-  # Chop the old compile flags into options and definitions
-  if(MPI_${LANG}_COMPILE_FLAGS)
-    unset(MPI_${LANG}_COMPILE_OPTIONS)
-    unset(MPI_${LANG}_COMPILE_DEFINITIONS)
-    separate_arguments(MPI_SEPARATE_FLAGS NATIVE_COMMAND "${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}")
+if(NOT MPI_IGNORE_LEGACY_VARIABLES)
+  foreach (LANG IN ITEMS C CXX)
+    # Old input variables.
+    set(_MPI_OLD_INPUT_VARS COMPILER COMPILE_FLAGS INCLUDE_PATH LINK_FLAGS)
+
+    # Set new vars based on their old equivalents, if the new versions are not already set.
+    foreach (var ${_MPI_OLD_INPUT_VARS})
+      if (NOT MPI_${LANG}_${var} AND MPI_${var})
+        set(MPI_${LANG}_${var} "${MPI_${var}}")
       endif()
     endforeach()
-    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()
+    # Chop the old compile flags into options and definitions
+
+    unset(MPI_${LANG}_EXTRA_COMPILE_DEFINITIONS)
+    unset(MPI_${LANG}_EXTRA_COMPILE_OPTIONS)
+    if(MPI_${LANG}_COMPILE_FLAGS)
+      separate_arguments(MPI_SEPARATE_FLAGS NATIVE_COMMAND "${MPI_${LANG}_COMPILE_FLAGS}")
+      foreach(_MPI_FLAG IN LISTS MPI_SEPARATE_FLAGS)
+        if("${_MPI_FLAG}" MATCHES "^ *[-/D]([^ ]+)")
+          list(APPEND MPI_${LANG}_EXTRA_COMPILE_DEFINITIONS "${CMAKE_MATCH_1}")
+        else()
+          list(APPEND MPI_${LANG}_EXTRA_COMPILE_OPTIONS "${_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
+    unset(MPI_${LANG}_EXTRA_LIB_NAMES)
+    if(NOT MPI_${LANG}_LIB_NAMES)
+      foreach(_MPI_LIB IN LISTS MPI_${LANG}_LIBRARIES MPI_LIBRARY MPI_EXTRA_LIBRARY)
+        if(_MPI_LIB)
+          get_filename_component(_MPI_PLAIN_LIB_NAME "${_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_${LANG}_EXTRA_LIB_NAMES "${_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)
+        endif()
+      endforeach()
+    endif()
+  endforeach()
+endif()
 #=============================================================================
 
 unset(MPI_VERSION)
@@ -1099,6 +1132,11 @@ unset(MPI_VERSION_MINOR)
 
 unset(_MPI_MIN_VERSION)
 
+# 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()
+
 # This loop finds the compilers and sends them off for interrogation.
 foreach(LANG IN ITEMS C CXX Fortran)
   if(CMAKE_${LANG}_COMPILER_LOADED)
@@ -1120,6 +1158,8 @@ foreach(LANG IN ITEMS C CXX Fortran)
       mark_as_advanced(MPI_CXX_SKIP_MPICXX)
     endif()
     if(NOT (MPI_${LANG}_LIB_NAMES AND (MPI_${LANG}_INCLUDE_PATH OR MPI_${LANG}_INCLUDE_DIRS OR MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS)))
+      set(MPI_${LANG}_TRIED_IMPLICIT FALSE)
+      set(MPI_${LANG}_WORKS_IMPLICIT FALSE)
       if(NOT MPI_${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.
@@ -1129,80 +1169,90 @@ foreach(LANG IN ITEMS C CXX Fortran)
         # 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 ${LANG}" FORCE)
+          set(MPI_${LANG}_WORKS_IMPLICIT TRUE)
         endif()
+        set(MPI_${LANG}_TRIED_IMPLICIT TRUE)
       endif()
 
-      # If the user specified a library name we assume they prefer that library over a wrapper. If not, they can disable skipping manually.
-      if(NOT DEFINED MPI_SKIP_COMPILER_WRAPPER AND MPI_GUESS_LIBRARY_NAME)
-        set(MPI_SKIP_COMPILER_WRAPPER TRUE)
-      endif()
-      if(NOT MPI_SKIP_COMPILER_WRAPPER)
-        if(MPI_${LANG}_COMPILER)
-          # If the user supplies a compiler *name* instead of an absolute path, assume that we need to find THAT compiler.
-          if (NOT IS_ABSOLUTE "${MPI_${LANG}_COMPILER}")
-            # Get rid of our default list of names and just search for the name the user wants.
-            set(_MPI_${LANG}_COMPILER_NAMES "${MPI_${LANG}_COMPILER}")
-            unset(MPI_${LANG}_COMPILER CACHE)
+      if(NOT "${MPI_${LANG}_COMPILER}" STREQUAL "${CMAKE_${LANG}_COMPILER}" OR NOT MPI_${LANG}_WORKS)
+        set(MPI_${LANG}_WRAPPER_FOUND FALSE)
+        set(MPI_PINNED_COMPILER FALSE)
+
+        if(NOT MPI_SKIP_COMPILER_WRAPPER)
+          if(MPI_${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)
+          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 user specifies a compiler, we don't want to try to search libraries either.
-          set(MPI_PINNED_COMPILER TRUE)
-        else()
-          set(MPI_PINNED_COMPILER FALSE)
-        endif()
 
-        # If we have an MPI base directory, we'll try all compiler names in that one first.
-        # This should prevent mixing different MPI environments
-        if(_MPI_BASE_DIR)
+          # 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
-            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)
+          if("${MPI_${LANG}_COMPILER}" STREQUAL "${CMAKE_${LANG}_COMPILER}")
+            set(MPI_PINNED_COMPILER TRUE)
+
+            # If we haven't made the implicit compiler test yet, perform it now.
+            if(NOT MPI_${LANG}_TRIED_IMPLICIT)
+              _MPI_create_imported_target(${LANG})
+              _MPI_check_lang_works(${LANG})
+            endif()
+
+            # Should the MPI compiler not work implicitly for MPI, still interrogate it.
+            # Otherwise, MPI compilers for which CMake has separate linking stages, e.g. Intel MPI on Windows where link.exe is being used
+            # directly during linkage instead of CMAKE_<LANG>_COMPILER will not work.
+            if(NOT MPI_${LANG}_WORKS)
+              set(MPI_${LANG}_WORKS_IMPLICIT FALSE)
+              _MPI_interrogate_compiler(${LANG})
+            else()
+              set(MPI_${LANG}_WORKS_IMPLICIT TRUE)
+            endif()
+          elseif(MPI_${LANG}_COMPILER)
+            _MPI_interrogate_compiler(${LANG})
+          endif()
         endif()
-      else()
-        set(MPI_${LANG}_WRAPPER_FOUND FALSE)
-        set(MPI_PINNED_COMPILER FALSE)
-      endif()
 
-      if(NOT MPI_${LANG}_WRAPPER_FOUND AND NOT MPI_PINNED_COMPILER)
-        # For C++, we may use the settings for C. Should a given compiler wrapper for C++ not exist, but one for C does, we copy over the
-        # settings for C. An MPI distribution that is in this situation would be IBM Platform MPI.
-        if("${LANG}" STREQUAL "CXX" AND MPI_C_WRAPPER_FOUND)
-          set(MPI_${LANG}_COMPILE_OPTIONS          ${MPI_C_COMPILE_OPTIONS}     CACHE STRING "MPI ${LANG} compilation options"           )
-          set(MPI_${LANG}_COMPILE_DEFINITIONS      ${MPI_C_COMPILE_DEFINITIONS} CACHE STRING "MPI ${LANG} compilation definitions"       )
-          set(MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS  ${MPI_C_INCLUDE_DIRS}        CACHE STRING "MPI ${LANG} additional include directories")
-          set(MPI_${LANG}_LINK_FLAGS               ${MPI_C_LINK_FLAGS}          CACHE STRING "MPI ${LANG} linker flags"                  )
-          set(MPI_${LANG}_LIB_NAMES                ${MPI_C_LIB_NAMES}           CACHE STRING "MPI ${LANG} libraries to link against"     )
-          set(MPI_${LANG}_WRAPPER_FOUND TRUE)
-        elseif(NOT MPI_SKIP_GUESSING)
-          _MPI_guess_settings(${LANG})
+        if(NOT MPI_SKIP_GUESSING AND NOT MPI_${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 ${LANG} libraries to link against"     )
+          else()
+            _MPI_guess_settings(${LANG})
+          endif()
         endif()
       endif()
     endif()
 
     _MPI_split_include_dirs(${LANG})
-    if(NOT MPI_${LANG}_COMPILER STREQUAL CMAKE_${LANG}_COMPILER)
-      _MPI_assemble_include_dirs(${LANG})
-      _MPI_assemble_libraries(${LANG})
-    endif()
+    _MPI_assemble_include_dirs(${LANG})
+    _MPI_assemble_libraries(${LANG})
+
     _MPI_adjust_compile_definitions(${LANG})
     # We always create imported targets even if they're empty
     _MPI_create_imported_target(${LANG})
@@ -1216,7 +1266,9 @@ foreach(LANG IN ITEMS C CXX Fortran)
     set(MPI_${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 ${LANG} libraries to link against"     )
+    if(NOT MPI_${LANG}_COMPILER STREQUAL CMAKE_${LANG}_COMPILER)
+      set(MPI_${LANG}_LIB_NAMES                "" CACHE STRING "MPI ${LANG} libraries to link against"   )
+    endif()
     mark_as_advanced(MPI_${LANG}_COMPILE_OPTIONS MPI_${LANG}_COMPILE_DEFINITIONS MPI_${LANG}_LINK_FLAGS
       MPI_${LANG}_LIB_NAMES MPI_${LANG}_ADDITIONAL_INCLUDE_DIRS MPI_${LANG}_COMPILER)
 
@@ -1336,7 +1388,7 @@ foreach(LANG IN ITEMS C CXX Fortran)
     set(MPI_${LANG}_FIND_VERSION_EXACT ${MPI_FIND_VERSION_EXACT})
 
     unset(MPI_${LANG}_REQUIRED_VARS)
-    if (MPI_${LANG}_WRAPPER_FOUND OR MPI_${LANG}_GUESS_FOUND)
+    if (NOT "${MPI_${LANG}_COMPILER}" STREQUAL "${CMAKE_${LANG}_COMPILER}")
       foreach(mpilibname IN LISTS MPI_${LANG}_LIB_NAMES)
         list(APPEND MPI_${LANG}_REQUIRED_VARS "MPI_${mpilibname}_LIBRARY")
       endforeach()
@@ -1447,6 +1499,7 @@ if (MPI_NUMLIBS GREATER 1)
 else()
   set(MPI_EXTRA_LIBRARY "MPI_EXTRA_LIBRARY-NOTFOUND")
 endif()
+set(MPI_IGNORE_LEGACY_VARIABLES TRUE)
 #=============================================================================
 
 # unset these vars to cleanup namespace
diff --git a/Modules/GoogleTest.cmake b/Modules/GoogleTest.cmake
index 41bd1dccd..c525101c7 100644
--- a/Modules/GoogleTest.cmake
+++ b/Modules/GoogleTest.cmake
@@ -217,6 +217,14 @@ same as the Google Test name (i.e. ``suite.testcase``); see also
     executable is being used in multiple calls to ``gtest_discover_tests()``.
     Note that this variable is only available in CTest.
 
+  ``TIMEOUT num``
+    Specifies how long (in seconds) CMake will wait for the test to enumerate
+    available tests.  If the test takes longer than this, discovery (and your
+    build) will fail.  Most test executables will enumerate their tests very
+    quickly, but under some exceptional circumstances, a test may require a
+    longer timeout.  The default is 5.  See also the ``TIMEOUT`` option of
+    :command:`execute_process`.
+
 #]=======================================================================]
 
 #------------------------------------------------------------------------------
@@ -349,7 +357,7 @@ function(gtest_discover_tests TARGET)
   cmake_parse_arguments(
     ""
     "NO_PRETTY_TYPES;NO_PRETTY_VALUES"
-    "TEST_PREFIX;TEST_SUFFIX;WORKING_DIRECTORY;TEST_LIST"
+    "TEST_PREFIX;TEST_SUFFIX;WORKING_DIRECTORY;TEST_LIST;TIMEOUT"
     "EXTRA_ARGS;PROPERTIES"
     ${ARGN}
   )
@@ -360,10 +368,36 @@ function(gtest_discover_tests TARGET)
   if(NOT _TEST_LIST)
     set(_TEST_LIST ${TARGET}_TESTS)
   endif()
+  if(NOT _TIMEOUT)
+    set(_TIMEOUT 5)
+  endif()
+
+  get_property(
+    has_counter
+    TARGET ${TARGET}
+    PROPERTY CTEST_DISCOVERED_TEST_COUNTER
+    SET
+  )
+  if(has_counter)
+    get_property(
+      counter
+      TARGET ${TARGET}
+      PROPERTY CTEST_DISCOVERED_TEST_COUNTER
+    )
+    math(EXPR counter "${counter} + 1")
+  else()
+    set(counter 1)
+  endif()
+  set_property(
+    TARGET ${TARGET}
+    PROPERTY CTEST_DISCOVERED_TEST_COUNTER
+    ${counter}
+  )
 
   # Define rule to generate test list for aforementioned test executable
-  set(ctest_include_file "${CMAKE_CURRENT_BINARY_DIR}/${TARGET}_include.cmake")
-  set(ctest_tests_file "${CMAKE_CURRENT_BINARY_DIR}/${TARGET}_tests.cmake")
+  set(ctest_file_base "${CMAKE_CURRENT_BINARY_DIR}/${TARGET}[${counter}]")
+  set(ctest_include_file "${ctest_file_base}_include.cmake")
+  set(ctest_tests_file "${ctest_file_base}_tests.cmake")
   get_property(crosscompiling_emulator
     TARGET ${TARGET}
     PROPERTY CROSSCOMPILING_EMULATOR
@@ -384,6 +418,7 @@ function(gtest_discover_tests TARGET)
             -D "NO_PRETTY_VALUES=${_NO_PRETTY_VALUES}"
             -D "TEST_LIST=${_TEST_LIST}"
             -D "CTEST_FILE=${ctest_tests_file}"
+            -D "TEST_DISCOVERY_TIMEOUT=${_TIMEOUT}"
             -P "${_GOOGLETEST_DISCOVER_TESTS_SCRIPT}"
     VERBATIM
   )
diff --git a/Modules/GoogleTestAddTests.cmake b/Modules/GoogleTestAddTests.cmake
index 7d0d9097b..5a4bdcad3 100644
--- a/Modules/GoogleTestAddTests.cmake
+++ b/Modules/GoogleTestAddTests.cmake
@@ -24,19 +24,24 @@ endfunction()
 # Run test executable to get list of available tests
 if(NOT EXISTS "${TEST_EXECUTABLE}")
   message(FATAL_ERROR
-    "Specified test executable '${TEST_EXECUTABLE}' does not exist"
+    "Specified test executable does not exist.\n"
+    "  Path: '${TEST_EXECUTABLE}'"
   )
 endif()
 execute_process(
   COMMAND ${TEST_EXECUTOR} "${TEST_EXECUTABLE}" --gtest_list_tests
+  TIMEOUT ${TEST_DISCOVERY_TIMEOUT}
   OUTPUT_VARIABLE output
   RESULT_VARIABLE result
 )
 if(NOT ${result} EQUAL 0)
+  string(REPLACE "\n" "\n    " output "${output}")
   message(FATAL_ERROR
-    "Error running test executable '${TEST_EXECUTABLE}':\n"
+    "Error running test executable.\n"
+    "  Path: '${TEST_EXECUTABLE}'\n"
     "  Result: ${result}\n"
-    "  Output: ${output}\n"
+    "  Output:\n"
+    "    ${output}\n"
   )
 endif()
 
diff --git a/Modules/InstallRequiredSystemLibraries.cmake b/Modules/InstallRequiredSystemLibraries.cmake
index 1ba4877e6..f62bd09b4 100644
--- a/Modules/InstallRequiredSystemLibraries.cmake
+++ b/Modules/InstallRequiredSystemLibraries.cmake
@@ -56,10 +56,13 @@
 #   Specify the :command:`install(PROGRAMS)` command ``COMPONENT``
 #   option.  If not specified, no such option will be used.
 
+cmake_policy(PUSH)
+cmake_policy(SET CMP0054 NEW) # if() quoted variables not dereferenced
+
 set(_IRSL_HAVE_Intel FALSE)
 set(_IRSL_HAVE_MSVC FALSE)
 foreach(LANG IN ITEMS C CXX Fortran)
-  if(CMAKE_${LANG}_COMPILER_ID STREQUAL Intel)
+  if("${CMAKE_${LANG}_COMPILER_ID}" STREQUAL "Intel")
     if(NOT _IRSL_HAVE_Intel)
       get_filename_component(_Intel_basedir "${CMAKE_${LANG}_COMPILER}" PATH)
       if(CMAKE_SIZEOF_VOID_P EQUAL 8)
@@ -81,7 +84,7 @@ foreach(LANG IN ITEMS C CXX Fortran)
       endif()
       set(_IRSL_HAVE_Intel TRUE)
     endif()
-  elseif(CMAKE_${LANG}_COMPILER_ID STREQUAL MSVC)
+  elseif("${CMAKE_${LANG}_COMPILER_ID}" STREQUAL "MSVC")
     set(_IRSL_HAVE_MSVC TRUE)
   endif()
 endforeach()
@@ -740,3 +743,5 @@ if(CMAKE_INSTALL_SYSTEM_RUNTIME_LIBS)
       )
   endif()
 endif()
+
+cmake_policy(POP)
diff --git a/Modules/Platform/Darwin-NVIDIA-CUDA.cmake b/Modules/Platform/Darwin-NVIDIA-CUDA.cmake
new file mode 100644
index 000000000..bec394839
--- /dev/null
+++ b/Modules/Platform/Darwin-NVIDIA-CUDA.cmake
@@ -0,0 +1,19 @@
+include(Platform/Darwin)
+
+set(__IMPLICT_LINKS )
+foreach(dir ${CMAKE_CUDA_HOST_IMPLICIT_LINK_DIRECTORIES})
+  string(APPEND __IMPLICT_LINKS " -L\"${dir}\"")
+endforeach()
+foreach(lib ${CMAKE_CUDA_HOST_IMPLICIT_LINK_LIBRARIES})
+  if(${lib} MATCHES "/")
+    string(APPEND __IMPLICT_LINKS " \"${lib}\"")
+  else()
+    string(APPEND __IMPLICT_LINKS " -l${lib}")
+  endif()
+endforeach()
+
+set(CMAKE_SHARED_LIBRARY_CREATE_CUDA_FLAGS "-shared -Wl,-headerpad_max_install_names")
+set(CMAKE_SHARED_MODULE_CREATE_CUDA_FLAGS "-shared -Wl,-headerpad_max_install_names")
+
+set(CMAKE_CUDA_CREATE_SHARED_LIBRARY "<CMAKE_CUDA_HOST_LINK_LAUNCHER> <CMAKE_SHARED_LIBRARY_CUDA_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CUDA_FLAGS> -o <TARGET> <SONAME_FLAG> <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>${__IMPLICT_LINKS}")
+set(CMAKE_CUDA_CREATE_SHARED_MODULE "<CMAKE_CUDA_HOST_LINK_LAUNCHER> <CMAKE_SHARED_LIBRARY_CUDA_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CUDA_FLAGS> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>${__IMPLICT_LINKS}")
diff --git a/Modules/Platform/UnixPaths.cmake b/Modules/Platform/UnixPaths.cmake
index 5687653cf..328d3c6d3 100644
--- a/Modules/Platform/UnixPaths.cmake
+++ b/Modules/Platform/UnixPaths.cmake
@@ -69,6 +69,9 @@ list(APPEND CMAKE_C_IMPLICIT_INCLUDE_DIRECTORIES
 list(APPEND CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES
   /usr/include
   )
+list(APPEND CMAKE_CUDA_IMPLICIT_INCLUDE_DIRECTORIES
+  /usr/include
+  )
 
 # Enable use of lib32 and lib64 search path variants by default.
 set_property(GLOBAL PROPERTY FIND_LIBRARY_USE_LIB32_PATHS TRUE)