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

diff --git a/package/Makefile b/package/Makefile
index 85f852f..c2015b3 100644 (file)
--- a/package/Makefile
+++ b/package/Makefile
@@ -55,6 +55,8 @@ install:
        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)