mpic++

compiles MPI C++ programs

TLDR

Compile MPI C++ program

$ mpic++ -o [program] [source.cpp]

Compile with optimization

$ mpic++ -O2 -o [program] [source.cpp]

Show compiler command

$ mpic++ --showme [source.cpp]

SYNOPSIS

mpic++ [options] sourcefiles_...

mpic++ is a compiler driver shipped with MPI implementations (Open MPI, MPICH, MVAPICH, Intel MPI) that invokes the underlying system C++ compiler with the include paths, library paths, and link libraries needed to build MPI programs. It is the C++ counterpart to mpicc and is typically a symlink or alias to mpicxx.The wrapped compiler can be overridden via the `OMPICXX` (Open MPI) or `MPICHCXX` (MPICH) environment variable, allowing the same wrapper to drive `g++`, `clang++`, `icpx`, etc.

PARAMETERS

-o file

Output file name.

-O level

Optimization level.

--showme

Show underlying compiler command.

-I dir

Include directory.

-L dir

Library directory.

-std= standard

C++ standard version (c++11, c++14, c++17, c++20).

-show

Print the underlying compiler command line that would be invoked, then exit (MPICH-style).

--showme:compile / --showme:link / --showme:command

Print only the compile flags, only the link flags, or only the wrapped compiler name (Open MPI).

INSTALL

sudo apk add openmpi-dev

CAVEATS

The flags injected by the wrapper depend on the MPI implementation; do not rely on `--showme` semantics being identical between Open MPI and MPICH. Mixing object files compiled with different MPI wrappers is unsafe.