libmrmpi-dev binary package in Ubuntu Focal riscv64

 The MapReduce-MPI (MR-MPI) library is open-source software that implements the
 MapReduce operation popularized by Google on top of standard MPI message
 passing.
 .
 The MR-MPI library is written in C++ and is callable from hi-level languages
 such as C++, C, Fortran. A Python wrapper is also included, so MapReduce
 programs can be written in Python, including map() and reduce() user callback
 methods. A hi-level scripting interface to the MR-MPI library, called OINK, is
 also included which can be used to develop and chain MapReduce algorithms
 together in scripts with commands that simplify data management tasks. OINK has
 its own manual and doc pages.
 .
 This package contains development files needed to build MapReduce-MPI
 applications.

Source package