use-mpi extensions do not have a .la lib, so the fortran module should not depend on them.

ompi/Makefile.am

@@ -87,6 +87,7 @@ SUBDIRS = \
         mpi/cxx \
         $(OMPI_MPIEXT_MPIFH_DIRS) \
         mpi/fortran/mpif-h \
+        $(OMPI_MPIEXT_USEMPI_DIR) \
         $(OMPI_FORTRAN_USEMPI_DIR) \
         $(OMPI_MPIEXT_USEMPIF08_DIRS) \
         $(OMPI_FORTRAN_USEMPIF08_DIR) \

ompi/mpi/fortran/use-mpi-ignore-tkr/Makefile.am

@@ -53,7 +53,6 @@ endif
 # directly (pulling it in indirectly via libmpi.la does not work on
 # all platforms).
 libmpi_usempi_ignore_tkr_la_LIBADD = \
-        $(OMPI_MPIEXT_USEMPI_LIBS) \
         $(OMPI_TOP_BUILDDIR)/opal/lib@OPAL_LIB_PREFIX@open-pal.la
 libmpi_usempi_ignore_tkr_la_LDFLAGS = \
         -version-info $(libmpi_usempi_ignore_tkr_so_version) \

ompi/mpi/fortran/use-mpi-tkr/Makefile.am

@@ -92,7 +92,6 @@ endif
 # platforms).
 libmpi_usempi_la_LIBADD = \
         $(top_builddir)/ompi/mpi/fortran/mpif-h/libmpi_mpifh.la \
-        $(OMPI_MPIEXT_USEMPI_LIBS) \
         $(OMPI_TOP_BUILDDIR)/opal/lib@OPAL_LIB_PREFIX@open-pal.la
 # Set the library version
 libmpi_usempi_la_LDFLAGS = \