--- /dev/null
+SSCONVERT ?=ssconvert
+
+%.xls: %.gnumeric
+ $(SSCONVERT) --export-type Gnumeric_Excel:excel_dsf $< $@
+
+%.txt: %.gnumeric
+ $(SSCONVERT) --export-type Gnumeric_stf:stf_assistant -O 'separator=" " quote="" eol="unix"' $< $@
+
+%.txt: %.xls
+ $(SSCONVERT) --export-type Gnumeric_stf:stf_assistant -O 'separator=" " quote="" eol="unix"' $< $@
+
+%.txt: %.xlsx
+ $(SSCONVERT) --export-type Gnumeric_stf:stf_assistant -O 'separator=" " quote="" eol="unix"' $< $@
+
+%.xls: %.txt
+ txt2xls $< > $@