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Fix MPI environment variable list size #455

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Merged
allnes merged 1 commit into from
Jun 20, 2025
Merged

Fix MPI environment variable list size #455

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5 changes: 4 additions & 1 deletion modules/core/util/src/util.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -28,7 +28,10 @@ int ppc::util::GetNumThreads() {
return 1;
}

constexpr std::array<std::string_view, 13> kMpiEnvVars = {
// List of environment variables that signal the application is running under
// an MPI launcher. The array size must match the number of entries to avoid
// looking up empty environment variable names.
constexpr std::array<std::string_view, 10> kMpiEnvVars = {
"OMPI_COMM_WORLD_SIZE", "OMPI_UNIVERSE_SIZE", "PMI_SIZE", "PMI_RANK", "PMI_FD",
"HYDRA_CONTROL_FD", "PMIX_RANK", "SLURM_PROCID", "MSMPI_RANK", "MSMPI_LOCALRANK"};

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