0495b5474b
Provides a patch for the fix in https://github.com/ornladios/ADIOS/pull/182 Installed ADIOS MPI-enabled libraries are with that able to also perform serial I/O without the need to start the whole app via `mpiexec`.
17 lines
530 B
Diff
17 lines
530 B
Diff
diff --git a/src/core/adios_internals_mxml.c b/src/core/adios_internals_mxml.c
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index 513fd45c..b9296050 100644
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--- a/src/core/adios_internals_mxml.c
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+++ b/src/core/adios_internals_mxml.c
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@@ -2173,8 +2173,9 @@ int adios_parse_config (const char * config, MPI_Comm comm)
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char * buffer = NULL;
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//#if HAVE_MPI
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int buffer_size = 0;
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- int rank;
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- MPI_Comm_rank (comm, &rank);
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+ int rank = 0;
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+ if (comm != MPI_COMM_NULL)
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+ MPI_Comm_rank (comm, &rank);
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init_comm = comm;
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if (rank == 0)
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{
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