install symbol thumbnails

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@50215 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/images/Makefile

@@ -6,10 +6,21 @@ ETCDIR = $(ETC)/gui/images
 
 FILES := $(wildcard *.png)
 
-default: $(patsubst %,$(ETCDIR)/%,$(FILES))
+default: $(patsubst %,$(ETCDIR)/%,$(FILES)) symbol_thumbnails
 
 $(ETCDIR)/%.png: %.png | $(ETCDIR)
 	$(INSTALL_DATA) $< $@
 
+symbol_thumbnails: $(ETCDIR)
+	if [ ! -d $(ETCDIR)/symbols ]; then $(MKDIR) $(ETCDIR)/symbols ; fi
+	for category in basic demo extra geology ; do \
+		if [ ! -d $(ETCDIR)/symbols/$$category ] ; then \
+			$(MKDIR) $(ETCDIR)/symbols/$$category ; \
+		fi ; \
+		for file in symbols/$$category/*.png ; do \
+			$(INSTALL_DATA) $$file $(ETCDIR)/symbols/$$category ; \
+		done ; \
+	done
+
 $(ETCDIR):
 	$(MKDIR) $@