move ccache to tools/ and fix potential dependency issue

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6413 3c298f89-4303-0410-b956-a3cf2f4a3e73

tools/Makefile

@@ -8,6 +8,7 @@
 #
 include $(TOPDIR)/rules.mk
 TARGETS-y:=sed sstrip ipkg-utils ext2fs squashfs mtd-utils lzma mkimage firmware-utils
+TARGETS-$(CONFIG_CCACHE) += ccache
 
 TARGETS_DOWNLOAD:=$(patsubst %,%-download,$(TARGETS-y))
 TARGETS_PREPARE:=$(patsubst %,%-prepare,$(TARGETS-y))
@@ -28,7 +29,7 @@ ifneq ($(shell $(SCRIPT_DIR)/timestamp.pl -p . $(STAMP)),$(STAMP))
   $(STAMP): $(TARGETS_INSTALL)
 endif
 
-$(STAMP):
+$(STAMP): $(TOPDIR)/.config
 	mkdir -p $(shell dirname $@)
 	touch $@
 	

tools/ccache/Makefile

@@ -0,0 +1,49 @@
+# 
+# Copyright (C) 2006 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+include $(TOPDIR)/rules.mk
+include $(INCLUDE_DIR)/target.mk
+
+PKG_NAME:=ccache
+PKG_VERSION:=2.4
+
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
+PKG_SOURCE_URL:=http://samba.org/ftp/ccache/
+PKG_MD5SUM:=73c1ed1e767c1752dd0f548ec1e66ce7
+PKG_CAT:=zcat
+
+PKG_BUILD_DIR:=$(TOOLCHAIN_BUILD_DIR)/$(PKG_NAME)-$(PKG_VERSION)
+
+include $(INCLUDE_DIR)/host-build.mk
+
+ifneq ($(strip $(shell which ccache >/dev/null && echo found)),found)
+  define Build/Compile
+	$(MAKE) CC="$(HOSTCC)" -C $(PKG_BUILD_DIR)
+  endef
+
+  define Build/Install
+	$(MAKE) -C $(PKG_BUILD_DIR) \
+		DESTDIR="$(STAGING_DIR)" \
+		install
+  endef
+
+  define Build/Clean
+	-$(MAKE) -C $(PKG_BUILD_DIR) uninstall
+	-$(MAKE) -C $(PKG_BUILD_DIR) clean
+	$(call Build/Clean/Default)
+  endef
+else
+  define Build/Prepare
+  endef
+  define Build/Configure
+  endef
+  define Build/Compile
+  endef
+  define Build/Clean
+  endef
+endif
+
+$(eval $(call HostBuild))