ifeq ($(strip $(PKG_UNPACK)),) ifneq ($(strip $(PKG_CAT)),) # use existing PKG_CAT PKG_UNPACK:=$(PKG_CAT) $(DL_DIR)/$(PKG_SOURCE) | $(TAR) -C $(PKG_BUILD_DIR)/.. $(TAR_OPTIONS) ifeq ($(PKG_CAT),unzip) PKG_UNPACK=unzip -d $(PKG_BUILD_DIR) $(DL_DIR)/$(PKG_SOURCE) endif # replace zcat with $(ZCAT), because some system have it as gzcat ifeq ($(PKG_CAT),zcat) PKG_UNPACK:=$(ZCAT) $(DL_DIR)/$(PKG_SOURCE) | $(TAR) -C $(PKG_BUILD_DIR)/.. $(TAR_OPTIONS) endif else # try to autodetect file type endif endif