libmpich-dev - 3.4.1-5~deb11u1 main

MPICH is a high-performance and widely portable implementation of the
MPI-3.1 standard from the Argonne National Laboratory.
It efficiently supports different computation and communication platforms
including commodity clusters, SMPs, massively parallel systems, and
high-speed networks.
This release has all MPI 3.1 functions and features required by the standard
with the exception of support for the "external32" portable I/O format and
user-defined data representations for I/O.
.
This package includes the MPICH headers and static libraries, as well
as the compiler wrappers needed to build MPICH programs.