Need to have empty targets when you put a target in AM_CONDITIONAL

This commit was SVN r5270.

src/mpi/f90/Makefile.am

@@ -162,4 +162,12 @@ uninstall-local:
 	  echo rm -f $(DESTDIR)$(libdir)/$$file; \
 	  rm -f $(DESTDIR)$(libdir)/$$file; \
 	done
+else
+
+# Need to have empty targets because AM can't handle having an
+# AM_CONDITIONAL was targets in the "if" statement but not in the
+# "else".  :-(
+
+install-exec-hook:
+uninstall-local:
 endif