[WP][FIX] (gremlin,grrefsub): fix Fortran dependency files

This is a legacy commit from before 2015-03-01.
It may be incomplete as well as inconsistent.
See COPYING.legacy and README.history for details.

dependency files must contain object files as targets in order to be effective

src/libs/libgrrefsub/Makefile

@@ -92,6 +92,8 @@ clean:
 
 flist: $(wildcard *.f *.inc) Makefile COPYING README
 	echo $^ | tr ' ' '\n' | sort > $@
+	echo "----" >> $@
+	echo $(TF_EDIT) | tr ' ' '\n' | sort >> $@
 .PHONY: edit
 edit: flist; vim $<
 
@@ -110,7 +112,8 @@ libgrrefsub.doc: gr_refsub.f
 #----------------------------------------------------------------------
 
 %.d: %.f
-	echo $<: $(shell cat $< | egrep '^ +include' | cut -f 2 -d \' | sort | uniq) > $@
+	echo $< $(patsubst %.f,%.o,$<): \
+	  $(shell cat $< | egrep '^ +include' | cut -f 2 -d \' | sort | uniq) > $@
 include $(patsubst %.f,%.d,$(wildcard *.f))
 
 %.o: %.f; $(FC) -c -o $@ $< $(FFLAGS)