fortran: moar fixes for the Fortran MPI_SIZEOF debacle

Ensure to define ompi/pompi versions for platforms that don't have
weak symbols.  Also make fortran/mpif-h/profile build a separate
sizeof library, just like fortran/mpifh-h does.

ompi/mpi/fortran/base/gen-mpi-sizeof.pl

@@ -227,16 +227,24 @@ sub output_file {
 ! compiler to build Open MPI.\n\n";
 
         if ($want_bodies) {
+            my $name = "ompi_sad_panda";
+            $name = "pompi_sad_panda"
+                if ($pmpi_arg);
             print OUT "!
 ! Dummy subroutine, just so that there is *some* Fortran in this file
-! (some compilers are unhappy if there are no Fortran statements in this
+! (this is defensive programming: since the Fortran compiler doesn't
+! support enough mojo, configure should set some AM_CONDITIONALs such
+! that this file should not end up being compiled, but just in case
+! that logic changes someday and this file *does* end up getting
+! compiled, make sure that it's not entirely empty because some
+! compilers are unhappy if there are no Fortran statements in this
 ! file).
-subroutine ompi_sad_panda()
+subroutine $name()
   implicit none
 
   print *, 'Open MPI is a sad panda because your Fortran compiler'
   print *, 'does not support enough Fortran mojo for MPI_SIZEOF'
-end subroutine ompi_sad_panda\n\n";
+end subroutine $name\n\n";
         }
     }
 

ompi/mpi/fortran/mpif-h/profile/Makefile.am

@@ -10,7 +10,7 @@
 #                         University of Stuttgart.  All rights reserved.
 # Copyright (c) 2004-2005 The Regents of the University of California.
 #                         All rights reserved.
-# Copyright (c) 2009-2014 Cisco Systems, Inc.  All rights reserved.
+# Copyright (c) 2009-2015 Cisco Systems, Inc.  All rights reserved.
 # Copyright (c) 2011-2013 Inria.  All rights reserved.
 # Copyright (c) 2011-2013 Universite Bordeaux 1
 # Copyright (c) 2013-2014 Los Alamos National Security, LLC. All rights
@@ -26,6 +26,9 @@
 
 include $(top_srcdir)/Makefile.ompi-rules
 
+CLEANFILES=
+libmpi_mpifh_pmpi_la_LIBADD =
+
 #
 # OMPI_PROFILING_DEFINES flag is enabled when we want our MPI_* symbols
 # to be replaced by PMPI_*. In other words, this flag decides
@@ -432,7 +435,19 @@ $(linked_files):
 
 # psizeof_f.f90 is generated based on some results from configure tests.
 CLEANFILES += psizeof_f.f90
+
+# Build the MPI_SIZEOF code in a separate convenience library (see
+# lengthy comment in ompi/mpi/fortran/mpif-h/Makefile.am for an
+# explanation why).
+#if BUILD_FORTRAN_SIZEOF
+noinst_LTLIBRARIES += libmpi_mpifh_psizeof.la
+# Do not dist this file; it is generated
+nodist_libmpi_mpifh_psizeof_la_SOURCES = psizeof_f.f90
+libmpi_mpifh_pmpi_la_LIBADD += libmpi_mpifh_psizeof.la
+#endif
+
 sizeof_pl=$(top_srcdir)/ompi/mpi/fortran/base/gen-mpi-sizeof.pl
+
 psizeof_f.f90: $(top_builddir)/config.status
 psizeof_f.f90: $(sizeof_pl)
 psizeof_f.f90:
@@ -447,7 +462,6 @@ psizeof_f.f90:
 # The library itself
 #
 nodist_libmpi_mpifh_pmpi_la_SOURCES = \
-        psizeof_f.f90 \
         $(linked_files)
 
 # Conditionally install the header files