Kommissar - a representative of the supreme authority in an area.

Der Kommissar is a spack environment (or set of known good environments) which will provide a set of packages, typically provided via the OS package manager, but built using spack with 'together' concretization and intended for consumption by spack as a localization platform on which to build a dependent environment (e.g. e4s) for a target system.

Building this environment generates the packages in the versions needed, and the script provided will generate a packages.yaml formatted file, to be included in downstream environments.

None of the packages contained herein should be built when the dependent environment is built. Furthermore, this environment should be built only with GCC, and at the GCC version level of the compiler used to build the dependent environment. In some cases, it may be possible to build these packages with llvm compilers instead of gcc compilers, but that is up to the discretion of the deployer.

Standardizing on the set of packages and concretizing together insures that they are as compatible as possible with one another, and also reduces the number of redundant (and sometimes failing) builds.

For LMOD installations, these packages are built with and made available through the Core compiler.