CMake: Include the new experimental FindMPI module

cmake/FindMPI.cmake

+#------------------------------------------------------------------------------#
+# Distributed under the OSI-approved Apache License, Version 2.0.  See
+# accompanying file Copyright.txt for details.
+#------------------------------------------------------------------------------#
+
+# This module is already included in new versions of CMake
+if(CMAKE_VERSION VERSION_LESS 3.10)
+  include(${CMAKE_CURRENT_LIST_DIR}/upstream/FindMPI.cmake)
+else()
+  include(${CMAKE_ROOT}/Modules/FindMPI.cmake)
+endif()

cmake/upstream/FindMPI/fortranparam_mpi.f90.in

+      program mpi_ver
+      @MPI_Fortran_INCLUDE_LINE@
+      print *, 'INFO:SUBARRAYS[', MPI_SUBARRAYS_SUPPORTED, ']-ASYNCPROT[', MPI_ASYNC_PROTECTS_NONBLOCKING, ']'
+      end program mpi_ver

cmake/upstream/FindMPI/libver_mpi.c

+#include <mpi.h>
+
+#ifdef __cplusplus
+#include <cstdio>
+#else
+#include <stdio.h>
+#endif
+
+int main(int argc, char* argv[])
+{
+  char mpilibver_str[MPI_MAX_LIBRARY_VERSION_STRING];
+  int mpilibver_len;
+  MPI_Get_library_version(mpilibver_str, &mpilibver_len);
+#ifdef __cplusplus
+  std::puts(mpilibver_str);
+#else
+  puts(mpilibver_str);
+#endif
+}

cmake/upstream/FindMPI/libver_mpi.f90.in

+      program mpi_ver
+      @MPI_Fortran_INCLUDE_LINE@
+      character(len=MPI_MAX_LIBRARY_VERSION_STRING) :: mpilibver_str
+      integer(kind=MPI_INTEGER_KIND) :: ierror, reslen
+      call MPI_GET_LIBRARY_VERSION(mpilibver_str, reslen, ierror)
+      print *, mpilibver_str
+      end program mpi_ver

cmake/upstream/FindMPI/mpiver.f90.in

+      program mpi_ver
+      @MPI_Fortran_INCLUDE_LINE@
+      integer(kind=kind(MPI_VERSION)), parameter :: zero = ichar('0')
+      character, dimension(17), parameter :: mpiver_str =&
+      (/ 'I', 'N', 'F', 'O', ':', 'M', 'P', 'I', '-', 'V', 'E', 'R', '[', &
+        char(zero + MPI_VERSION), &
+        '.', &
+        char(zero + MPI_SUBVERSION), ']' /)
+      print *, mpiver_str
+      end program mpi_ver

cmake/upstream/FindMPI/test_mpi.c

+#include <mpi.h>
+
+#ifdef __cplusplus
+#include <cstdio>
+#else
+#include <stdio.h>
+#endif
+
+#if defined(MPI_VERSION) && defined(MPI_SUBVERSION)
+const char mpiver_str[] = { 'I', 'N',
+                            'F', 'O',
+                            ':', 'M',
+                            'P', 'I',
+                            '-', 'V',
+                            'E', 'R',
+                            '[', ('0' + MPI_VERSION),
+                            '.', ('0' + MPI_SUBVERSION),
+                            ']', '\0' };
+#endif
+
+int main(int argc, char* argv[])
+{
+#if defined(MPI_VERSION) && defined(MPI_SUBVERSION)
+#ifdef __cplusplus
+  std::puts(mpiver_str);
+#else
+  puts(mpiver_str);
+#endif
+#endif
+#ifdef TEST_MPI_MPICXX
+  MPI::MPI_Init(&argc, &argv);
+  MPI::MPI_Finalize();
+#else
+  MPI_Init(&argc, &argv);
+  MPI_Finalize();
+#endif
+}

cmake/upstream/FindMPI/test_mpi.cxx

+#include <mpi.h>
+#include <cstdio>
+
+#if defined(MPI_VERSION) && defined(MPI_SUBVERSION)
+const char mpiver_str[] = { 'I', 'N',
+                            'F', 'O',
+                            ':', 'M',
+                            'P', 'I',
+                            '-', 'V',
+                            'E', 'R',
+                            '[', ('0' + MPI_VERSION),
+                            '.', ('0' + MPI_SUBVERSION),
+                            ']', '\0' };
+#endif
+
+int main(int argc, char* argv[])
+{
+#if defined(MPI_VERSION) && defined(MPI_SUBVERSION)
+  std::puts(mpiver_str);
+#endif
+  MPI::MPI_Init(&argc, &argv);
+  MPI::MPI_Finalize();
+}

cmake/upstream/FindMPI/test_mpi.f90.in

+      program hello
+      @MPI_Fortran_INCLUDE_LINE@
+      integer@MPI_Fortran_INTEGER_LINE@ ierror
+      call MPI_INIT(ierror)
+      call MPI_FINALIZE(ierror)
+      end program

cmake/upstream/FindMPI/test_mpi_c.cxx

+#include <mpi.h>
+#include <cstdio>
+
+#if defined(MPI_VERSION) && defined(MPI_SUBVERSION)
+const char mpiver_str[] = { 'I', 'N',
+                            'F', 'O',
+                            ':', 'M',
+                            'P', 'I',
+                            '-', 'V',
+                            'E', 'R',
+                            '[', ('0' + MPI_VERSION),
+                            '.', ('0' + MPI_SUBVERSION),
+                            ']', '\0' };
+#endif
+
+int main(int argc, char* argv[])
+{
+#if defined(MPI_VERSION) && defined(MPI_SUBVERSION)
+  std::puts(mpiver_str);
+#endif
+  MPI_Init(&argc, &argv);
+  MPI_Finalize();
+}