only rebuild the package index when the *.ipk files have changed
only rebuild the package index when the *.ipk files have changed


git-svn-id: svn://svn.openwrt.org/openwrt/branches/buildroot-ng/openwrt@4395 3c298f89-4303-0410-b956-a3cf2f4a3e73

--- a/package/Makefile
+++ b/package/Makefile
@@ -55,7 +55,9 @@
 	rm -rf $(BUILD_DIR)/root
 	$(MAKE) install-targets
 
-index: FORCE
+index: $(PACKAGE_DIR)/Packages
+
+$(PACKAGE_DIR)/Packages: $(PACKAGE_DIR)/*.ipk
 	(cd $(PACKAGE_DIR); $(STAGING_DIR)/usr/bin/ipkg-make-index . > Packages)
 
 

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