Add API support for Fortran MPI_F08 module definitions. (#3959)

* revert to using c-stub for _F08 MPI APIs

* use mpi compiler wrappers for cmake and nvhpc

.github/workflows/nvhpc-cmake.yml

@@ -33,8 +33,8 @@ jobs:
           echo 'deb [signed-by=/usr/share/keyrings/nvidia-hpcsdk-archive-keyring.gpg] https://developer.download.nvidia.com/hpc-sdk/ubuntu/amd64 /' | sudo tee /etc/apt/sources.list.d/nvhpc.list
           sudo apt-get update -y
           sudo apt-get install -y nvhpc-23-9
-          echo "CC=nvc" >> $GITHUB_ENV
-          echo "FC=nvfortran" >> $GITHUB_ENV
+          echo "CC=/opt/nvidia/hpc_sdk/Linux_x86_64/23.9/comm_libs/openmpi4/bin/mpicc" >> $GITHUB_ENV
+          echo "FC=/opt/nvidia/hpc_sdk/Linux_x86_64/23.9/comm_libs/openmpi4/bin/mpifort" >> $GITHUB_ENV
           echo "NVHPCSDK=/opt/nvidia/hpc_sdk" >> $GITHUB_ENV
           echo "OMPI_CXX=/opt/nvidia/hpc_sdk/Linux_x86_64/23.9/compilers/bin/nvc++" >> $GITHUB_ENV
           echo "OMPI_CC=/opt/nvidia/hpc_sdk/Linux_x86_64/23.9/compilers/bin/nvc" >> $GITHUB_ENV

CMakeLists.txt

@@ -1085,6 +1085,13 @@ if (EXISTS "${HDF5_SOURCE_DIR}/fortran" AND IS_DIRECTORY "${HDF5_SOURCE_DIR}/for
       if (MPI_Fortran_LINK_FLAGS)
         set (CMAKE_Fortran_EXE_LINKER_FLAGS "${MPI_Fortran_LINK_FLAGS} ${CMAKE_EXE_LINKER_FLAGS}")
       endif ()
+      # Check if MPI-3 Fortran 2008 module mpi_f08 is supported
+      if (MPI_Fortran_HAVE_F08_MODULE)
+        set (H5_HAVE_MPI_F08 1)
+        message (VERBOSE "MPI-3 Fortran 2008 module mpi_f08 is supported")
+      else ()
+        message (VERBOSE "MPI-3 Fortran 2008 module mpi_f08 is NOT supported")
+      endif ()
     endif ()
 
     #option (HDF5_INSTALL_MOD_FORTRAN "Copy FORTRAN mod files to include directory (NO SHARED STATIC)" "NO")

config/cmake/H5pubconf.h.in

@@ -243,6 +243,9 @@
 /* Define if we have parallel support */
 #cmakedefine H5_HAVE_PARALLEL @H5_HAVE_PARALLEL@
 
+/* Define if MPI Fortran supports mpi_f08 module */
+#cmakedefine H5_HAVE_MPI_F08 @H5_HAVE_MPI_F08@
+
 /* Define if we have support for writing to filtered datasets in parallel */
 #cmakedefine H5_HAVE_PARALLEL_FILTERED_WRITES @H5_HAVE_PARALLEL_FILTERED_WRITES@
 

configure.ac

@@ -2840,6 +2840,25 @@ if test -n "$PARALLEL"; then
                 AC_MSG_RESULT([yes])],
                 [AC_MSG_RESULT([no])]
     )
+
+    AC_LANG_PUSH([Fortran])
+    AC_MSG_CHECKING([for MPI-3 module mpi_f08])
+    AC_LINK_IFELSE(
+      [AC_LANG_PROGRAM([],
+                       [
+                        USE mpi_f08
+                        IMPLICIT NONE
+                        TYPE(MPI_Comm) :: comm
+                        TYPE(MPI_INFO) :: info
+                       ]
+                      )
+      ],
+      [AC_DEFINE([HAVE_MPI_F08], [1],
+                [Define if mpi_f08 module exist])
+                AC_MSG_RESULT([yes])],
+                [AC_MSG_RESULT([no])]
+    )
+    AC_LANG_POP(Fortran)
   fi
 
   ## ----------------------------------------------------------------------

fortran/src/CMakeLists.txt

@@ -24,6 +24,13 @@ if (WIN32)
   endif ()
 endif ()
 
+if (H5_HAVE_MPI_F08) # MPI-3 module mpi_f08 supported
+  set (CMAKE_H5_HAVE_MPI_F08 1)
+else ()
+  set (H5_NOMPI_F08 ";")
+  set (CMAKE_H5_HAVE_MPI_F08 0)
+endif ()
+
 # configure for Fortran preprocessor
 
 # Define Parallel variable for passing to H5config_f.inc.cmake