In file included from /usr/include/hdf5/openmpi/hdf5.h:22,
                 from /tmp/opencv/opencv_contrib-4.1.2/modules/hdf/src/hdf5.cpp:37:
/usr/include/hdf5/openmpi/H5public.h:60:13: fatal error: mpi.h: No such file or directory
 #   include <mpi.h>
             ^~~~~~~
compilation terminated.
make[3]: *** [modules/hdf/CMakeFiles/opencv_hdf.dir/build.make:63: modules/hdf/CMakeFiles/opencv_hdf.dir/src/hdf5.cpp.o] Error 1
make[3]: Leaving directory '/tmp/opencv/opencv-4.1.2/build'
make[2]: *** [CMakeFiles/Makefile2:2591: modules/hdf/CMakeFiles/opencv_hdf.dir/all] Error 2
make[2]: Leaving directory '/tmp/opencv/opencv-4.1.2/build'
make[1]: *** [Makefile:163: all] Error 2
make[1]: Leaving directory '/tmp/opencv/opencv-4.1.2/build'
/tmp/opencv/opencv-4.1.2