move common unpacking code to unpack.mk, replace zcat with $(ZCAT) for systems that use gzcat instead
[openwrt.org/openwrt.git] / include / host.mk
blob:a/include/host.mk -> blob:b/include/host.mk
--- a/include/host.mk
+++ b/include/host.mk
@@ -1,15 +1,20 @@
 # 
-# Copyright (C) 2006 OpenWrt.org
+# Copyright (C) 2007 OpenWrt.org
 #
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.
 #
 
-include $(TOPDIR)/.host.mk
+TMP_DIR ?= $(TOPDIR)/tmp
+-include $(TMP_DIR)/.host.mk
 
 export TAR
 
-$(TOPDIR)/.host.mk: $(INCLUDE_DIR)/host.mk
+ifneq ($(__host_inc),1)
+__host_inc:=1
+.PRECIOUS: $(TMP_DIR)/.host.mk
+$(TMP_DIR)/.host.mk: $(TOPDIR)/include/host.mk
+	@mkdir -p $(TMP_DIR)
 	@( \
 		HOST_OS=`uname`; \
 		case "$$HOST_OS" in \
@@ -22,15 +27,22 @@
 		echo "HOST_OS:=$$HOST_OS" > $@; \
 		echo "HOST_ARCH:=$$HOST_ARCH" >> $@; \
 		echo "GNU_HOST_NAME:=$$GNU_HOST_NAME" >> $@; \
-		TAR=`which gtar`; \
-		[ -n "$$TAR" -a -x "$$TAR" ] || TAR=`which tar`; \
+		TAR=`which gtar 2>/dev/null`; \
+		[ -n "$$TAR" -a -x "$$TAR" ] || TAR=`which tar 2>/dev/null`; \
 		echo "TAR:=$$TAR" >> $@; \
-		if $$TAR --version 2>&1 | grep 'GNU' >/dev/null; then \
-			echo "TAR_WILDCARDS:=--wildcards" >> $@; \
+		echo "BASH:=$(shell which bash)" >> $@; \
+		if find -L /tmp -maxdepth 0 >/dev/null 2>/dev/null; then \
+			echo 'FIND_L=find -L $$(1)' >>$@; \
+		else \
+			echo 'FIND_L=find $$(1) -follow' >> $@; \
 		fi; \
-		ZCAT=`which gzcat`; \
-		[ -n "$$ZCAT" -a -x "$$ZCAT" ] || ZCAT=`which zcat`; \
-		echo "ZCAT:=$$ZCAT" >> $@; \
 	)
 
+endif
 
+ifeq ($(HOST_OS),Linux)
+  XARGS:=xargs -r
+else
+  XARGS:=xargs
+endif
+

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