[mpich-discuss] [PATCH] Use attribute layout_compatible for pair types

[Jed Brown]

In addition, I suggest guarding these definitions. Leaving these in
increases the total number of symbols in an example executable linking
PETSc by a factor of 2. (They're all read-only, but they're still there.)
Clang is smart enough to remove these, presumably because it understands
the special attributes.

static const MPI_Datatype mpich_mpi_float_int
MPICH_ATTR_TYPE_TAG_LAYOUT_COMPATIBLE(struct mpich_struct_mpi_float_int)
    = MPI_FLOAT_INT;
static const MPI_Datatype mpich_mpi_double_int
 MPICH_ATTR_TYPE_TAG_LAYOUT_COMPATIBLE(struct mpich_struct_mpi_double_int)
     = MPI_DOUBLE_INT;
static const MPI_Datatype mpich_mpi_long_int
 MPICH_ATTR_TYPE_TAG_LAYOUT_COMPATIBLE(struct mpich_struct_mpi_long_int)
     = MPI_LONG_INT;
static const MPI_Datatype mpich_mpi_short_int
MPICH_ATTR_TYPE_TAG_LAYOUT_COMPATIBLE(struct mpich_struct_mpi_short_int)
    = MPI_SHORT_INT;
static const MPI_Datatype mpich_mpi_2int
 MPICH_ATTR_TYPE_TAG_LAYOUT_COMPATIBLE(struct mpich_struct_mpi_2int)
     = MPI_2INT;
static const MPI_Datatype mpich_mpi_long_double_int
MPICH_ATTR_TYPE_TAG_LAYOUT_COMPATIBLE(struct
mpich_struct_mpi_long_double_int) = MPI_LONG_DOUBLE_INT;



>
>
> On Tue, Jan 1, 2013 at 11:48 AM, Jed Brown <jedbrown at mcs.anl.gov> wrote:
>
>> ---
>>  src/include/mpi.h.in | 12 ++++++------
>>  1 file changed, 6 insertions(+), 6 deletions(-)
>>
>>
>
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