fortran: Add missing predefined datatype named constants.

This commit add the following Fortran named constants which are
defined in the MPI standard but are missing in Open MPI.

- `MPI_LONG_LONG` (defined as a synonym of `MPI_LONG_LONG_INT`)
- `MPI_CXX_FLOAT_COMPLEX`
- `MPI_C_BOOL`

And this commit also changes the value of the following Fortran
named constant for consistency.

- `MPI_C_COMPLEX`
  `(MPI_C_FLOAT_COMPLEX` is defined as a synonym of this)

Each needs a different solution described below.

For `MPI_LONG_LONG`:

The value of `MPI_LONG_LONG` is defined to have a same value
as `MPI_LONG_LONG_INT` because of the following reasons.

1. It is defined as a synonym of `MPI_LONG_LONG_INT` in
   the MPI standard.
2. `MPI_LONG_LONG_INT` and `MPI_LONG_LONG` has a same value
   for C in `mpi.h`.
3. `ompi_mpi_long_long` is not defined in
   `ompi/datatype/ompi_datatype_module.c`.

For `MPI_CXX_FLOAT_COMPLEX`:

Existing `MPI_CXX_COMPLEX` is replaced with `MPI_CXX_FLOAT_COMPLEX`
bacause `MPI_CXX_FLOAT_COMPLEX` is the right name defined in MPI-3.1
and `MPI_CXX_COMPLEX` is not defined in MPI-3.1 (nor older).
But for compatibility, `MPI_CXX_COMPLEX` is treated as a synonym
of `MPI_CXX_FLOAT_COMPLEX` on Open MPI.

For `MPI_C_BOOL`:

`MPI_C_BOOL` is newly added. The value which `MPI_C_COMPLEX` had
used (68) is assinged for it because the value becomes no longer
in use (described later) and it is a suited position as a datatype
added on MPI-2.2.

For `MPI_C_COMPLEX`:

Existing `MPI_C_FLOAT_COMPLEX` is replaced with `MPI_C_COMPLEX`
and `MPI_C_FLOAT_COMPLEX` is changed to have the same value.
In other words, make `MPI_C_COMPLEX` the canonical name and
make `MPI_C_FLOAT_COMPLEX` an alias of it.
This is bacause the relation of these datatypes is same as
the relation of `MPI_LONG_LONG_INT` and `MPI_LONG_LONG`, and
`MPI_LONG_LONG_INT` and `MPI_LONG_LONG` are implemented like that.
But in the datatype engine, we use `ompi_mpi_c_float_complex`
instead of `ompi_mpi_c_complex` as a variable name to keep
the consistency with the other similar types such as
`ompi_mpi_c_double_complex` (see George's comment in open-mpi/ompi#1927).
We don't delete `ompi_mpi_c_complex` now because it is used in
some other places in Open MPI code. It may be cleand up in the future.

In addition, `MPI_CXX_COMPLEX`, which was defined only in the Open MPI
Fortran binding, is added to `mpi.h` for the C binding.

This commit breaks binary compatibility of Fortran `MPI_C_COMPLEX`.
When this commit is merged into v2.x branch, the change of
`MPI_C_COMPLEX` should be excluded.

ompi/datatype/ompi_datatype_module.c

@@ -109,7 +109,7 @@ ompi_predefined_datatype_t ompi_mpi_cxx_bool =       OMPI_DATATYPE_INIT_PREDEFIN
 /*
  * Complex datatypes for C (base types), C++, and fortran
  */
-ompi_predefined_datatype_t ompi_mpi_c_float_complex =       OMPI_DATATYPE_INIT_PREDEFINED (C_FLOAT_COMPLEX, OMPI_DATATYPE_FLAG_DATA_C | OMPI_DATATYPE_FLAG_DATA_COMPLEX );
+ompi_predefined_datatype_t ompi_mpi_c_float_complex =       OMPI_DATATYPE_INIT_PREDEFINED_BASIC_TYPE (C_FLOAT_COMPLEX, C_COMPLEX, OMPI_DATATYPE_FLAG_DATA_C | OMPI_DATATYPE_FLAG_DATA_COMPLEX );
 ompi_predefined_datatype_t ompi_mpi_c_complex =             OMPI_DATATYPE_INIT_PREDEFINED_BASIC_TYPE (C_FLOAT_COMPLEX, C_COMPLEX, OMPI_DATATYPE_FLAG_DATA_C | OMPI_DATATYPE_FLAG_DATA_COMPLEX );
 ompi_predefined_datatype_t ompi_mpi_c_double_complex =      OMPI_DATATYPE_INIT_PREDEFINED (C_DOUBLE_COMPLEX, OMPI_DATATYPE_FLAG_DATA_C | OMPI_DATATYPE_FLAG_DATA_COMPLEX );
 #if HAVE_LONG_DOUBLE
@@ -533,7 +533,7 @@ int32_t ompi_datatype_init( void )
     }
 
     /*
-     * This MUST match the order of ompi/include/mpif-common.h
+     * This MUST match the order of ompi/include/mpif-values.pl
      * Any change will break binary compatibility of Fortran programs.
      */
     MOOG(datatype_null, 0);
@@ -614,7 +614,7 @@ int32_t ompi_datatype_init( void )
     MOOG(uint64_t, 65);
     MOOG(aint, 66);
     MOOG(offset, 67);
-    MOOG(c_complex, 68);
+    MOOG(c_bool, 68);
     MOOG(c_float_complex, 69);
     MOOG(c_double_complex, 70);
     MOOG(c_long_double_complex, 71);

ompi/include/mpi.h.in

@@ -1006,7 +1006,6 @@ OMPI_DECLSPEC extern struct ompi_predefined_datatype_t ompi_mpi_aint;
 OMPI_DECLSPEC extern struct ompi_predefined_datatype_t ompi_mpi_offset;
 OMPI_DECLSPEC extern struct ompi_predefined_datatype_t ompi_mpi_count;
 OMPI_DECLSPEC extern struct ompi_predefined_datatype_t ompi_mpi_c_bool;
-OMPI_DECLSPEC extern struct ompi_predefined_datatype_t ompi_mpi_c_complex;
 OMPI_DECLSPEC extern struct ompi_predefined_datatype_t ompi_mpi_c_float_complex;
 OMPI_DECLSPEC extern struct ompi_predefined_datatype_t ompi_mpi_c_double_complex;
 OMPI_DECLSPEC extern struct ompi_predefined_datatype_t ompi_mpi_c_long_double_complex;
@@ -1153,7 +1152,7 @@ OMPI_DECLSPEC extern MPI_Fint *MPI_F_STATUSES_IGNORE;
 #define MPI_OFFSET                OMPI_PREDEFINED_GLOBAL(MPI_Datatype, ompi_mpi_offset)
 #define MPI_C_BOOL                OMPI_PREDEFINED_GLOBAL(MPI_Datatype, ompi_mpi_c_bool)
 #if HAVE_FLOAT__COMPLEX
-#define MPI_C_COMPLEX             OMPI_PREDEFINED_GLOBAL(MPI_Datatype, ompi_mpi_c_complex)
+#define MPI_C_COMPLEX             OMPI_PREDEFINED_GLOBAL(MPI_Datatype, ompi_mpi_c_float_complex)
 #define MPI_C_FLOAT_COMPLEX       OMPI_PREDEFINED_GLOBAL(MPI_Datatype, ompi_mpi_c_float_complex)
 #endif
 #if HAVE_DOUBLE__COMPLEX
@@ -1163,6 +1162,7 @@ OMPI_DECLSPEC extern MPI_Fint *MPI_F_STATUSES_IGNORE;
 #define MPI_C_LONG_DOUBLE_COMPLEX OMPI_PREDEFINED_GLOBAL(MPI_Datatype, ompi_mpi_c_long_double_complex)
 #endif
 #define MPI_CXX_BOOL              OMPI_PREDEFINED_GLOBAL(MPI_Datatype, ompi_mpi_cxx_bool)
+#define MPI_CXX_COMPLEX           OMPI_PREDEFINED_GLOBAL(MPI_Datatype, ompi_mpi_cxx_cplex)
 #define MPI_CXX_FLOAT_COMPLEX     OMPI_PREDEFINED_GLOBAL(MPI_Datatype, ompi_mpi_cxx_cplex)
 #define MPI_CXX_DOUBLE_COMPLEX    OMPI_PREDEFINED_GLOBAL(MPI_Datatype, ompi_mpi_cxx_dblcplex)
 #define MPI_CXX_LONG_DOUBLE_COMPLEX OMPI_PREDEFINED_GLOBAL(MPI_Datatype, ompi_mpi_cxx_ldblcplex)

ompi/include/mpif-values.pl

@@ -162,6 +162,7 @@ $handles->{MPI_UNSIGNED} = 40;
 $handles->{MPI_LONG} = 41;
 $handles->{MPI_UNSIGNED_LONG} = 42;
 $handles->{MPI_LONG_LONG_INT} = 43;
+$handles->{MPI_LONG_LONG} = $handles->{MPI_LONG_LONG_INT};
 $handles->{MPI_UNSIGNED_LONG_LONG} = 44;
 $handles->{MPI_FLOAT} = 45;
 $handles->{MPI_DOUBLE} = 46;
@@ -173,7 +174,8 @@ $handles->{MPI_LONG_INT} = 51;
 $handles->{MPI_2INT} = 52;
 $handles->{MPI_SHORT_INT} = 53;
 $handles->{MPI_CXX_BOOL} = 54;
-$handles->{MPI_CXX_COMPLEX} = 55;
+$handles->{MPI_CXX_FLOAT_COMPLEX} = 55;
+$handles->{MPI_CXX_COMPLEX} = $handles->{MPI_CXX_FLOAT_COMPLEX};
 $handles->{MPI_CXX_DOUBLE_COMPLEX} = 56;
 $handles->{MPI_CXX_LONG_DOUBLE_COMPLEX} = 57;
 $handles->{MPI_INT8_T} = 58;
@@ -186,8 +188,9 @@ $handles->{MPI_INT64_T} = 64;
 $handles->{MPI_UINT64_T} = 65;
 $handles->{MPI_AINT} = 66;
 $handles->{MPI_OFFSET} = 67;
-$handles->{MPI_C_COMPLEX} = 68;
-$handles->{MPI_C_FLOAT_COMPLEX} = 69;
+$handles->{MPI_C_BOOL} = 68;
+$handles->{MPI_C_COMPLEX} = 69;
+$handles->{MPI_C_FLOAT_COMPLEX} = $handles->{MPI_C_COMPLEX};
 $handles->{MPI_C_DOUBLE_COMPLEX} = 70;
 $handles->{MPI_C_LONG_DOUBLE_COMPLEX} = 71;
 $handles->{MPI_COUNT} = 72;