coarrayenabled

Coarrayenabled is a software configuration term used to denote that a component, module, or application provides or requires support for coarray parallel programming. Coarrays refer to a Partitioned Global Address Space (PGAS) model that enables convenient expression of distributed-memory parallelism, often through language features or a runtime library. When a project is marked as coarrayenabled, it signals that coarray syntax and the associated runtime mechanisms for inter-image communication are available and usable.

In practice, coarrayenabled may appear in build systems, package metadata, or documentation as a boolean capability. A project can be coarrayenabled by compiling with a coarray-capable compiler and linking against a coarray runtime, such as a PGAS runtime or a dedicated coarray library. Conversely, a project without coarrayenabled would disable or avoid coarray paths, falling back to alternative parallelism models (e.g., MPI) or single-process execution.

Usage typically involves ensuring compatibility between the language standard, compiler, and runtime. Enabling coarrays often requires specific toolchains, such as compilers with coarray support and corresponding runtimes, and may necessitate environment configuration for inter-process communication. Performance characteristics depend on the underlying runtime and hardware topology, and portability can vary across platforms.

See also: coarrays, PGAS, OpenCoarrays, Fortran coarrays, Chapel, UPC, parallel programming runtimes.