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int main( int argc, char **argv)
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MPI_Datatype tmptype, newtype, oldtypes[2];
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MPI_Aint offsets[2], extent, lb, ub;
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MPI_Init(&argc, &argv);
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oldtypes[0] = MPI_BYTE;
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blockcnt[1] = 1; /* set upper bound to avoid padding */
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MPI_Type_struct(2, blockcnt, offsets, oldtypes, &tmptype);
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MPI_Type_commit(&tmptype);
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MPI_Type_size(tmptype, &size);
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MPI_Type_lb(tmptype, &lb);
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MPI_Type_ub(tmptype, &ub);
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MPI_Type_extent(tmptype, &extent);
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printf("tmptype: size: %d lb: %ld ub: %ld ex: %ld\n",
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size, (long)lb, (long)ub, (long)extent);
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oldtypes[0] = tmptype;
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MPI_Type_struct(1, blockcnt, offsets, oldtypes, &newtype);
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MPI_Type_commit(&newtype);
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MPI_Type_size(newtype, &size);
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MPI_Type_lb(newtype, &lb);
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MPI_Type_ub(newtype, &ub);
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MPI_Type_extent(newtype, &extent);
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printf("newtype: size: %d lb: %ld ub: %ld ex: %ld\n",
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size, (long)lb, (long)ub, (long)extent);
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if (size != 1 || lb != 2 || ub != 3 || extent != 1) {
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printf("lb = %ld (should be 2), ub = %ld (should be 3) extent = %ld should be 1, size = %d (should be 1)\n",
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(long)lb, (long)ub, (long)extent, size);
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printf( " No Errors\n" );
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MPI_Type_free(&tmptype);
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MPI_Type_free(&newtype);