correct example linking MPI

Author: scivision

Examples/CMakeLists.txt

@@ -1,16 +1,17 @@
 cmake_minimum_required(VERSION 3.20...3.22)
 
 project(h5mpiExample
-LANGUAGES Fortran
+LANGUAGES C Fortran
 )
 
 enable_testing()
 
+find_package(MPI COMPONENTS C Fortran REQUIRED)
 find_package(h5mpi CONFIG REQUIRED)
 
 # --- example 1
 add_executable(example1 example1.f90)
-target_link_libraries(example1 h5mpi::h5mpi)
+target_link_libraries(example1 h5mpi::h5mpi MPI::MPI_Fortran MPI::MPI_C)
 
 add_test(NAME Example1
 COMMAND $<TARGET_FILE:example1>

Examples/example1.f90

@@ -1,15 +1,17 @@
 program example2
 
-use, intrinsic :: iso_fortran_env, only : real32
+use, intrinsic :: iso_fortran_env, only : real32, int32
 
-use mpi, only : mpi_init, mpi_finalize
+use mpi, only : mpi_init, MPI_COMM_WORLD, mpi_comm_rank, mpi_comm_size
 
 use h5mpi, only : hdf5_file, HSIZE_T
 
 implicit none (type, external)
 
+external :: mpi_finalize
+
 character(*), parameter :: filename = 'example1.h5'
-integer :: ierr, mpi_id, Nmpi
+integer(int32) :: ierr, mpi_id, Nmpi, i32
 
 type(hdf5_file) :: h5f