Move common code to ompi/mpi/fortran/base.

The attribute and conversion callback subroutine interfaces
are used by all 3 modules, and belong in the fortran/base directory,
not the directory of a specific module.

Also clean up some comments.

cmr=v1.7.4:ticket=4162

This commit was SVN r30378.

The following Trac tickets were found above:
  Ticket 4162 --> https://svn.open-mpi.org/trac/ompi/ticket/4162

ompi/mpi/fortran/base/attr_fn-f90-interfaces.h

@@ -11,13 +11,6 @@
 ! $HEADER$
 !
 
-! Note about these declarations: these are "external" functions in
-! mpif-common.h.  However, if we don't declare them here, compilers will add
-! them to the "mpi" module namespace, and result in linker errors if MPI
-! F90 applications try to use them.  Because the implementations of
-! these functions are not in the MPI module namespace -- they're the F77
-! functions.
-
 interface
 
   subroutine mpi_type_null_delete_fn( type, type_keyval, attribute_val_out, &

ompi/mpi/fortran/use-mpi-f08/mpi-f08.F90

@@ -36,14 +36,12 @@ module mpi_f08
 #include "mpi-f-interfaces-bind.h"
 #include "pmpi-f-interfaces-bind.h"
 
-! The MPI attribute callback functions need to be explictly called out
+! The MPI attribute callback functions
-! so that they don't end up in the MPI namespace.  See a longer
-! explanation in attr_fn-f90-interfaces.h.
-!
-!  include "ompi/mpi/fortran/use-mpi/attr_fn-f90-interfaces.h"
 
-! Similarly, we need the MPI_CONVERSION_FN_NULL function
+  include "ompi/mpi/fortran/base/attr_fn-f90-interfaces.h"
-!
+
-!  include "ompi/mpi/fortran/use-mpi/conversion_fn_null-f90-interface.h"
+! The MPI_CONVERSION_FN_NULL function
+
+  include "ompi/mpi/fortran/base/conversion_fn_null-f90-interface.h"
 
 end module mpi_f08

ompi/mpi/fortran/use-mpi-ignore-tkr/mpi-ignore-tkr.F90

@@ -31,15 +31,13 @@ module mpi
 #endif
   include "mpif-sentinels.h"
 
-! The MPI attribute callback functions need to be explictly called out
+! The MPI attribute callback functions
-! so that they don't end up in the MPI namespace.  See a longer
-! explanation in attr_fn-f90-interfaces.h.
 
-  include "ompi/mpi/fortran/use-mpi-tkr/attr_fn-f90-interfaces.h"
+  include "ompi/mpi/fortran/base/attr_fn-f90-interfaces.h"
 
 ! Similarly, we need the MPI_CONVERSION_FN_NULL function
 
-  include "ompi/mpi/fortran/use-mpi-tkr/conversion_fn_null-f90-interface.h"
+  include "ompi/mpi/fortran/base/conversion_fn_null-f90-interface.h"
 
 ! The ignore-TKR version of the MPI interfaces
 

ompi/mpi/fortran/use-mpi-tkr/mpi.F90

@@ -31,15 +31,13 @@ module mpi
 #endif
   include "mpif-sentinels.h"
 
-! The MPI attribute callback functions need to be explictly called out
+! The MPI attribute callback functions
-! so that they don't end up in the MPI namespace.  See a longer
-! explanation in attr_fn-f90-interfaces.h.
 
-  include "attr_fn-f90-interfaces.h"
+  include "ompi/mpi/fortran/base/attr_fn-f90-interfaces.h"
 
-! Similarly, we need the MPI_CONVERSION_FN_NULL function
+! The MPI_CONVERSION_FN_NULL function
 
-  include "conversion_fn_null-f90-interface.h"
+  include "ompi/mpi/fortran/base/conversion_fn_null-f90-interface.h"
 
 ! This file is generated, and is *huge*.  Its size is directly related
 ! to the --with-f90-max-array-dim configure parameter.